Rename Quat to Quaternion

37 files changed, 308 insertions, 308 deletions

diff --git a/modules/fbx/data/pivot_transform.cpp b/modules/fbx/data/pivot_transform.cpp
index 3e4e197fbf..4cf42257a4 100644
--- a/modules/fbx/data/pivot_transform.cpp
+++ b/modules/fbx/data/pivot_transform.cpp
@@ -90,7 +90,7 @@ void PivotTransform::ReadTransformChain() {
 	if (ok) {
 		geometric_rotation = ImportUtils::EulerToQuaternion(rot, ImportUtils::deg2rad(GeometricRotation));
 	} else {
-		geometric_rotation = Quat();
+		geometric_rotation = Quaternion();
 	}
 
 	const Vector3 &GeometricTranslation = ImportUtils::safe_import_vector3(FBXDocParser::PropertyGet<Vector3>(props, "GeometricTranslation", ok));
@@ -100,7 +100,7 @@ void PivotTransform::ReadTransformChain() {
 		geometric_translation = Vector3(0, 0, 0);
 	}
 
-	if (geometric_rotation != Quat()) {
+	if (geometric_rotation != Quaternion()) {
 		print_error("geometric rotation is unsupported!");
 		//CRASH_COND(true);
 	}
@@ -116,7 +116,7 @@ void PivotTransform::ReadTransformChain() {
 	}
 }
 
-Transform3D PivotTransform::ComputeLocalTransform(Vector3 p_translation, Quat p_rotation, Vector3 p_scaling) const {
+Transform3D PivotTransform::ComputeLocalTransform(Vector3 p_translation, Quaternion p_rotation, Vector3 p_scaling) const {
 	Transform3D T, Roff, Rp, Soff, Sp, S;
 
 	// Here I assume this is the operation which needs done.
@@ -142,18 +142,18 @@ Transform3D PivotTransform::ComputeLocalTransform(Vector3 p_translation, Quat p_
 Transform3D PivotTransform::ComputeGlobalTransform(Transform3D t) const {
 	Vector3 pos = t.origin;
 	Vector3 scale = t.basis.get_scale();
-	Quat rot = t.basis.get_rotation_quat();
+	Quaternion rot = t.basis.get_rotation_quaternion();
 	return ComputeGlobalTransform(pos, rot, scale);
 }
 
 Transform3D PivotTransform::ComputeLocalTransform(Transform3D t) const {
 	Vector3 pos = t.origin;
 	Vector3 scale = t.basis.get_scale();
-	Quat rot = t.basis.get_rotation_quat();
+	Quaternion rot = t.basis.get_rotation_quaternion();
 	return ComputeLocalTransform(pos, rot, scale);
 }
 
-Transform3D PivotTransform::ComputeGlobalTransform(Vector3 p_translation, Quat p_rotation, Vector3 p_scaling) const {
+Transform3D PivotTransform::ComputeGlobalTransform(Vector3 p_translation, Quaternion p_rotation, Vector3 p_scaling) const {
 	Transform3D T, Roff, Rp, Soff, Sp, S;
 
 	// Here I assume this is the operation which needs done.
@@ -183,11 +183,11 @@ Transform3D PivotTransform::ComputeGlobalTransform(Vector3 p_translation, Quat p
 	}
 
 	Transform3D local_rotation_m, parent_global_rotation_m;
-	Quat parent_global_rotation = parent_global_xform.basis.get_rotation_quat();
-	parent_global_rotation_m.basis.set_quat(parent_global_rotation);
+	Quaternion parent_global_rotation = parent_global_xform.basis.get_rotation_quaternion();
+	parent_global_rotation_m.basis.set_quaternion(parent_global_rotation);
 	local_rotation_m = Rpre * R * Rpost;
 
-	//Basis parent_global_rotation = Basis(parent_global_xform.get_basis().get_rotation_quat().normalized());
+	//Basis parent_global_rotation = Basis(parent_global_xform.get_basis().get_rotation_quaternion().normalized());
 
 	Transform3D local_shear_scaling, parent_shear_scaling, parent_shear_rotation, parent_shear_translation;
 	Vector3 parent_translation = parent_global_xform.get_origin();
@@ -250,11 +250,11 @@ void PivotTransform::ComputePivotTransform() {
 	}
 
 	Transform3D local_rotation_m, parent_global_rotation_m;
-	Quat parent_global_rotation = parent_global_xform.basis.get_rotation_quat();
-	parent_global_rotation_m.basis.set_quat(parent_global_rotation);
+	Quaternion parent_global_rotation = parent_global_xform.basis.get_rotation_quaternion();
+	parent_global_rotation_m.basis.set_quaternion(parent_global_rotation);
 	local_rotation_m = Rpre * R * Rpost;
 
-	//Basis parent_global_rotation = Basis(parent_global_xform.get_basis().get_rotation_quat().normalized());
+	//Basis parent_global_rotation = Basis(parent_global_xform.get_basis().get_rotation_quaternion().normalized());
 
 	Transform3D local_shear_scaling, parent_shear_scaling, parent_shear_rotation, parent_shear_translation;
 	Vector3 parent_translation = parent_global_xform.get_origin();
diff --git a/modules/fbx/data/pivot_transform.h b/modules/fbx/data/pivot_transform.h
index 8ed8358b70..29cf7a3d0e 100644
--- a/modules/fbx/data/pivot_transform.h
+++ b/modules/fbx/data/pivot_transform.h
@@ -58,10 +58,10 @@ enum TransformationComp {
 struct PivotTransform : Reference, ModelAbstraction {
 	// at the end we want to keep geometric_ everything, post and pre rotation
 	// these are used during animation data processing / keyframe ingestion the rest can be simplified down / out.
-	Quat pre_rotation = Quat();
-	Quat post_rotation = Quat();
-	Quat rotation = Quat();
-	Quat geometric_rotation = Quat();
+	Quaternion pre_rotation = Quaternion();
+	Quaternion post_rotation = Quaternion();
+	Quaternion rotation = Quaternion();
+	Quaternion geometric_rotation = Quaternion();
 	Vector3 rotation_pivot = Vector3();
 	Vector3 rotation_offset = Vector3();
 	Vector3 scaling_offset = Vector3(1.0, 1.0, 1.0);
@@ -87,8 +87,8 @@ struct PivotTransform : Reference, ModelAbstraction {
 
 	Transform3D ComputeGlobalTransform(Transform3D t) const;
 	Transform3D ComputeLocalTransform(Transform3D t) const;
-	Transform3D ComputeGlobalTransform(Vector3 p_translation, Quat p_rotation, Vector3 p_scaling) const;
-	Transform3D ComputeLocalTransform(Vector3 p_translation, Quat p_rotation, Vector3 p_scaling) const;
+	Transform3D ComputeGlobalTransform(Vector3 p_translation, Quaternion p_rotation, Vector3 p_scaling) const;
+	Transform3D ComputeLocalTransform(Vector3 p_translation, Quaternion p_rotation, Vector3 p_scaling) const;
 
 	/* Extract into xforms and calculate once */
 	void ComputePivotTransform();
diff --git a/modules/fbx/editor_scene_importer_fbx.cpp b/modules/fbx/editor_scene_importer_fbx.cpp
index 4da0b55f42..40deaae74d 100644
--- a/modules/fbx/editor_scene_importer_fbx.cpp
+++ b/modules/fbx/editor_scene_importer_fbx.cpp
@@ -258,24 +258,24 @@ struct EditorSceneImporterAssetImportInterpolate {
 
 //thank you for existing, partial specialization
 template <>
-struct EditorSceneImporterAssetImportInterpolate<Quat> {
-	Quat lerp(const Quat &a, const Quat &b, float c) const {
-		ERR_FAIL_COND_V(!a.is_normalized(), Quat());
-		ERR_FAIL_COND_V(!b.is_normalized(), Quat());
+struct EditorSceneImporterAssetImportInterpolate<Quaternion> {
+	Quaternion lerp(const Quaternion &a, const Quaternion &b, float c) const {
+		ERR_FAIL_COND_V(!a.is_normalized(), Quaternion());
+		ERR_FAIL_COND_V(!b.is_normalized(), Quaternion());
 
 		return a.slerp(b, c).normalized();
 	}
 
-	Quat catmull_rom(const Quat &p0, const Quat &p1, const Quat &p2, const Quat &p3, float c) {
-		ERR_FAIL_COND_V(!p1.is_normalized(), Quat());
-		ERR_FAIL_COND_V(!p2.is_normalized(), Quat());
+	Quaternion catmull_rom(const Quaternion &p0, const Quaternion &p1, const Quaternion &p2, const Quaternion &p3, float c) {
+		ERR_FAIL_COND_V(!p1.is_normalized(), Quaternion());
+		ERR_FAIL_COND_V(!p2.is_normalized(), Quaternion());
 
 		return p1.slerp(p2, c).normalized();
 	}
 
-	Quat bezier(Quat start, Quat control_1, Quat control_2, Quat end, float t) {
-		ERR_FAIL_COND_V(!start.is_normalized(), Quat());
-		ERR_FAIL_COND_V(!end.is_normalized(), Quat());
+	Quaternion bezier(Quaternion start, Quaternion control_1, Quaternion control_2, Quaternion end, float t) {
+		ERR_FAIL_COND_V(!start.is_normalized(), Quaternion());
+		ERR_FAIL_COND_V(!end.is_normalized(), Quaternion());
 
 		return start.slerp(end, t).normalized();
 	}
@@ -888,7 +888,7 @@ Node3D *EditorSceneImporterFBX::_generate_scene(
 					// we need to know what object the curves are for.
 					// we need the target ID and the target name for the track reduction.
 
-					FBXDocParser::Model::RotOrder quat_rotation_order = FBXDocParser::Model::RotOrder_EulerXYZ;
+					FBXDocParser::Model::RotOrder quaternion_rotation_order = FBXDocParser::Model::RotOrder_EulerXYZ;
 
 					// T:: R:: S:: Visible:: Custom::
 					for (const FBXDocParser::AnimationCurveNode *curve_node : node_list) {
@@ -910,7 +910,7 @@ Node3D *EditorSceneImporterFBX::_generate_scene(
 							continue;
 						} else {
 							//print_verbose("[doc] applied rotation order: " + itos(target->RotationOrder()));
-							quat_rotation_order = target->RotationOrder();
+							quaternion_rotation_order = target->RotationOrder();
 						}
 
 						uint64_t target_id = target->ID();
@@ -1086,7 +1086,7 @@ Node3D *EditorSceneImporterFBX::_generate_scene(
 						Vector<float> pos_times;
 						Vector<Vector3> scale_values;
 						Vector<float> scale_times;
-						Vector<Quat> rot_values;
+						Vector<Quaternion> rot_values;
 						Vector<float> rot_times;
 
 						double max_duration = 0;
@@ -1122,8 +1122,8 @@ Node3D *EditorSceneImporterFBX::_generate_scene(
 						bool got_pre = false;
 						bool got_post = false;
 
-						Quat post_rotation;
-						Quat pre_rotation;
+						Quaternion post_rotation;
+						Quaternion pre_rotation;
 
 						// Rotation matrix
 						const Vector3 &PreRotation = FBXDocParser::PropertyGet<Vector3>(props, "PreRotation", got_pre);
@@ -1137,24 +1137,24 @@ Node3D *EditorSceneImporterFBX::_generate_scene(
 							post_rotation = ImportUtils::EulerToQuaternion(rot_order, ImportUtils::deg2rad(PostRotation));
 						}
 
-						Quat lastQuat = Quat();
+						Quaternion lastQuaternion = Quaternion();
 
 						for (std::pair<int64_t, Vector3> rotation_key : rotation_keys.keyframes) {
 							double animation_track_time = CONVERT_FBX_TIME(rotation_key.first);
 
 							//print_verbose("euler rotation key: " + rotation_key.second);
-							Quat rot_key_value = ImportUtils::EulerToQuaternion(quat_rotation_order, ImportUtils::deg2rad(rotation_key.second));
+							Quaternion rot_key_value = ImportUtils::EulerToQuaternion(quaternion_rotation_order, ImportUtils::deg2rad(rotation_key.second));
 
-							if (lastQuat != Quat() && rot_key_value.dot(lastQuat) < 0) {
+							if (lastQuaternion != Quaternion() && rot_key_value.dot(lastQuaternion) < 0) {
 								rot_key_value.x = -rot_key_value.x;
 								rot_key_value.y = -rot_key_value.y;
 								rot_key_value.z = -rot_key_value.z;
 								rot_key_value.w = -rot_key_value.w;
 							}
 							// pre_post rotation possibly could fix orientation
-							Quat final_rotation = pre_rotation * rot_key_value * post_rotation;
+							Quaternion final_rotation = pre_rotation * rot_key_value * post_rotation;
 
-							lastQuat = final_rotation;
+							lastQuaternion = final_rotation;
 
 							if (animation_track_time > max_duration) {
 								max_duration = animation_track_time;
@@ -1182,13 +1182,13 @@ Node3D *EditorSceneImporterFBX::_generate_scene(
 						}
 
 						const Vector3 def_pos = translation_keys.has_default ? (translation_keys.default_value * state.scale) : bone_rest.origin;
-						const Quat def_rot = rotation_keys.has_default ? ImportUtils::EulerToQuaternion(quat_rotation_order, ImportUtils::deg2rad(rotation_keys.default_value)) : bone_rest.basis.get_rotation_quat();
+						const Quaternion def_rot = rotation_keys.has_default ? ImportUtils::EulerToQuaternion(quaternion_rotation_order, ImportUtils::deg2rad(rotation_keys.default_value)) : bone_rest.basis.get_rotation_quaternion();
 						const Vector3 def_scale = scale_keys.has_default ? scale_keys.default_value : bone_rest.basis.get_scale();
 						print_verbose("track defaults: p(" + def_pos + ") s(" + def_scale + ") r(" + def_rot + ")");
 
 						while (true) {
 							Vector3 pos = def_pos;
-							Quat rot = def_rot;
+							Quaternion rot = def_rot;
 							Vector3 scale = def_scale;
 
 							if (pos_values.size()) {
@@ -1197,7 +1197,7 @@ Node3D *EditorSceneImporterFBX::_generate_scene(
 							}
 
 							if (rot_values.size()) {
-								rot = _interpolate_track<Quat>(rot_times, rot_values, time,
+								rot = _interpolate_track<Quaternion>(rot_times, rot_values, time,
 										AssetImportAnimation::INTERP_LINEAR);
 							}
 
@@ -1209,12 +1209,12 @@ Node3D *EditorSceneImporterFBX::_generate_scene(
 							// node animations must also include pivots
 							if (skeleton_bone >= 0) {
 								Transform3D xform = Transform3D();
-								xform.basis.set_quat_scale(rot, scale);
+								xform.basis.set_quaternion_scale(rot, scale);
 								xform.origin = pos;
 								const Transform3D t = bone_rest.affine_inverse() * xform;
 
 								// populate	this again
-								rot = t.basis.get_rotation_quat();
+								rot = t.basis.get_rotation_quaternion();
 								rot.normalize();
 								scale = t.basis.get_scale();
 								pos = t.origin;
diff --git a/modules/fbx/tools/import_utils.cpp b/modules/fbx/tools/import_utils.cpp
index 259000d2a4..66b0153308 100644
--- a/modules/fbx/tools/import_utils.cpp
+++ b/modules/fbx/tools/import_utils.cpp
@@ -80,7 +80,7 @@ Basis ImportUtils::EulerToBasis(FBXDocParser::Model::RotOrder mode, const Vector
 	return ret;
 }
 
-Quat ImportUtils::EulerToQuaternion(FBXDocParser::Model::RotOrder mode, const Vector3 &p_rotation) {
+Quaternion ImportUtils::EulerToQuaternion(FBXDocParser::Model::RotOrder mode, const Vector3 &p_rotation) {
 	return ImportUtils::EulerToBasis(mode, p_rotation);
 }
 
@@ -117,7 +117,7 @@ Vector3 ImportUtils::BasisToEuler(FBXDocParser::Model::RotOrder mode, const Basi
 	}
 }
 
-Vector3 ImportUtils::QuaternionToEuler(FBXDocParser::Model::RotOrder mode, const Quat &p_rotation) {
+Vector3 ImportUtils::QuaternionToEuler(FBXDocParser::Model::RotOrder mode, const Quaternion &p_rotation) {
 	return BasisToEuler(mode, p_rotation);
 }
 
diff --git a/modules/fbx/tools/import_utils.h b/modules/fbx/tools/import_utils.h
index 3972f7520e..7625f67256 100644
--- a/modules/fbx/tools/import_utils.h
+++ b/modules/fbx/tools/import_utils.h
@@ -56,13 +56,13 @@ public:
 	static Basis EulerToBasis(FBXDocParser::Model::RotOrder mode, const Vector3 &p_rotation);
 
 	/// Converts rotation order vector (in rad) to quaternion.
-	static Quat EulerToQuaternion(FBXDocParser::Model::RotOrder mode, const Vector3 &p_rotation);
+	static Quaternion EulerToQuaternion(FBXDocParser::Model::RotOrder mode, const Vector3 &p_rotation);
 
 	/// Converts basis into rotation order vector (in rad).
 	static Vector3 BasisToEuler(FBXDocParser::Model::RotOrder mode, const Basis &p_rotation);
 
 	/// Converts quaternion into rotation order vector (in rad).
-	static Vector3 QuaternionToEuler(FBXDocParser::Model::RotOrder mode, const Quat &p_rotation);
+	static Vector3 QuaternionToEuler(FBXDocParser::Model::RotOrder mode, const Quaternion &p_rotation);
 
 	static void debug_xform(String name, const Transform3D &t) {
 		print_verbose(name + " " + t.origin + " rotation: " + (t.basis.get_euler() * (180 / Math_PI)));
diff --git a/modules/gdnative/gdnative/quat.cpp b/modules/gdnative/gdnative/quaternion.cpp
index 8ebcf7c91f..62bcbbd382 100644
--- a/modules/gdnative/gdnative/quat.cpp
+++ b/modules/gdnative/gdnative/quaternion.cpp
@@ -1,5 +1,5 @@
 /*************************************************************************/
-/*  quat.cpp                                                             */
+/*  quaternion.cpp                                                       */
 /*************************************************************************/
 /*                       This file is part of:                           */
 /*                           GODOT ENGINE                                */
@@ -28,31 +28,31 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
-#include "gdnative/quat.h"
+#include "gdnative/quaternion.h"
 
-#include "core/math/quat.h"
+#include "core/math/quaternion.h"
 
-static_assert(sizeof(godot_quat) == sizeof(Quat), "Quat size mismatch");
+static_assert(sizeof(godot_quaternion) == sizeof(Quaternion), "Quaternion size mismatch");
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-void GDAPI godot_quat_new(godot_quat *p_self) {
-	memnew_placement(p_self, Quat);
+void GDAPI godot_quaternion_new(godot_quaternion *p_self) {
+	memnew_placement(p_self, Quaternion);
 }
 
-void GDAPI godot_quat_new_copy(godot_quat *r_dest, const godot_quat *p_src) {
-	memnew_placement(r_dest, Quat(*(Quat *)p_src));
+void GDAPI godot_quaternion_new_copy(godot_quaternion *r_dest, const godot_quaternion *p_src) {
+	memnew_placement(r_dest, Quaternion(*(Quaternion *)p_src));
 }
 
-godot_real_t GDAPI *godot_quat_operator_index(godot_quat *p_self, godot_int p_index) {
-	Quat *self = (Quat *)p_self;
+godot_real_t GDAPI *godot_quaternion_operator_index(godot_quaternion *p_self, godot_int p_index) {
+	Quaternion *self = (Quaternion *)p_self;
 	return (godot_real_t *)&self->operator[](p_index);
 }
 
-const godot_real_t GDAPI *godot_quat_operator_index_const(const godot_quat *p_self, godot_int p_index) {
-	const Quat *self = (const Quat *)p_self;
+const godot_real_t GDAPI *godot_quaternion_operator_index_const(const godot_quaternion *p_self, godot_int p_index) {
+	const Quaternion *self = (const Quaternion *)p_self;
 	return (const godot_real_t *)&self->operator[](p_index);
 }
 
diff --git a/modules/gdnative/gdnative/variant.cpp b/modules/gdnative/gdnative/variant.cpp
index c588704627..24f50a94f5 100644
--- a/modules/gdnative/gdnative/variant.cpp
+++ b/modules/gdnative/gdnative/variant.cpp
@@ -143,10 +143,10 @@ void GDAPI godot_variant_new_plane(godot_variant *r_dest, const godot_plane *p_p
 	memnew_placement_custom(dest, Variant, Variant(*plane));
 }
 
-void GDAPI godot_variant_new_quat(godot_variant *r_dest, const godot_quat *p_quat) {
+void GDAPI godot_variant_new_quaternion(godot_variant *r_dest, const godot_quaternion *p_quaternion) {
 	Variant *dest = (Variant *)r_dest;
-	const Quat *quat = (const Quat *)p_quat;
-	memnew_placement_custom(dest, Variant, Variant(*quat));
+	const Quaternion *quaternion = (const Quaternion *)p_quaternion;
+	memnew_placement_custom(dest, Variant, Variant(*quaternion));
 }
 
 void GDAPI godot_variant_new_aabb(godot_variant *r_dest, const godot_aabb *p_aabb) {
@@ -378,10 +378,10 @@ godot_plane GDAPI godot_variant_as_plane(const godot_variant *p_self) {
 	return raw_dest;
 }
 
-godot_quat GDAPI godot_variant_as_quat(const godot_variant *p_self) {
-	godot_quat raw_dest;
+godot_quaternion GDAPI godot_variant_as_quaternion(const godot_variant *p_self) {
+	godot_quaternion raw_dest;
 	const Variant *self = (const Variant *)p_self;
-	Quat *dest = (Quat *)&raw_dest;
+	Quaternion *dest = (Quaternion *)&raw_dest;
 	*dest = *self;
 	return raw_dest;
 }
diff --git a/modules/gdnative/gdnative_api.json b/modules/gdnative/gdnative_api.json
index ec825229ac..175a6a3c91 100644
--- a/modules/gdnative/gdnative_api.json
+++ b/modules/gdnative/gdnative_api.json
@@ -469,7 +469,7 @@
 				]
 			},
 			{
-				"name": "godot_variant_new_quat",
+				"name": "godot_variant_new_quaternion",
 				"return_type": "void",
 				"arguments": [
 					[
@@ -477,8 +477,8 @@
 						"r_dest"
 					],
 					[
-						"const godot_quat *",
-						"p_quat"
+						"const godot_quaternion *",
+						"p_quaternion"
 					]
 				]
 			},
@@ -893,8 +893,8 @@
 				]
 			},
 			{
-				"name": "godot_variant_as_quat",
-				"return_type": "godot_quat",
+				"name": "godot_variant_as_quaternion",
+				"return_type": "godot_quaternion",
 				"arguments": [
 					[
 						"const godot_variant *",
@@ -3866,35 +3866,35 @@
 				]
 			},
 			{
-				"name": "godot_quat_new",
+				"name": "godot_quaternion_new",
 				"return_type": "void",
 				"arguments": [
 					[
-						"godot_quat *",
+						"godot_quaternion *",
 						"p_self"
 					]
 				]
 			},
 			{
-				"name": "godot_quat_new_copy",
+				"name": "godot_quaternion_new_copy",
 				"return_type": "void",
 				"arguments": [
 					[
-						"godot_quat *",
+						"godot_quaternion *",
 						"r_dest"
 					],
 					[
-						"const godot_quat *",
+						"const godot_quaternion *",
 						"p_src"
 					]
 				]
 			},
 			{
-				"name": "godot_quat_operator_index",
+				"name": "godot_quaternion_operator_index",
 				"return_type": "godot_real_t *",
 				"arguments": [
 					[
-						"godot_quat *",
+						"godot_quaternion *",
 						"p_self"
 					],
 					[
@@ -3904,11 +3904,11 @@
 				]
 			},
 			{
-				"name": "godot_quat_operator_index_const",
+				"name": "godot_quaternion_operator_index_const",
 				"return_type": "const godot_real_t *",
 				"arguments": [
 					[
-						"const godot_quat *",
+						"const godot_quaternion *",
 						"p_self"
 					],
 					[
diff --git a/modules/gdnative/include/gdnative/gdnative.h b/modules/gdnative/include/gdnative/gdnative.h
index 1937748bd4..d8c290f6bd 100644
--- a/modules/gdnative/include/gdnative/gdnative.h
+++ b/modules/gdnative/include/gdnative/gdnative.h
@@ -149,9 +149,9 @@ typedef void godot_object;
 
 #include <gdnative/plane.h>
 
-/////// Quat
+/////// Quaternion
 
-#include <gdnative/quat.h>
+#include <gdnative/quaternion.h>
 
 /////// AABB
 
diff --git a/modules/gdnative/include/gdnative/quat.h b/modules/gdnative/include/gdnative/quaternion.h
index 00abdb4404..75754e6ab5 100644
--- a/modules/gdnative/include/gdnative/quat.h
+++ b/modules/gdnative/include/gdnative/quaternion.h
@@ -1,5 +1,5 @@
 /*************************************************************************/
-/*  quat.h                                                               */
+/*  quaternion.h                                                         */
 /*************************************************************************/
 /*                       This file is part of:                           */
 /*                           GODOT ENGINE                                */
@@ -28,8 +28,8 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
-#ifndef GODOT_QUAT_H
-#define GODOT_QUAT_H
+#ifndef GODOT_QUATERNION_H
+#define GODOT_QUATERNION_H
 
 #ifdef __cplusplus
 extern "C" {
@@ -37,24 +37,24 @@ extern "C" {
 
 #include <gdnative/math_defs.h>
 
-#define GODOT_QUAT_SIZE (sizeof(godot_real_t) * 4)
+#define GODOT_QUATERNION_SIZE (sizeof(godot_real_t) * 4)
 
-#ifndef GODOT_CORE_API_GODOT_QUAT_TYPE_DEFINED
-#define GODOT_CORE_API_GODOT_QUAT_TYPE_DEFINED
+#ifndef GODOT_CORE_API_GODOT_QUATERNION_TYPE_DEFINED
+#define GODOT_CORE_API_GODOT_QUATERNION_TYPE_DEFINED
 typedef struct {
-	uint8_t _dont_touch_that[GODOT_QUAT_SIZE];
-} godot_quat;
+	uint8_t _dont_touch_that[GODOT_QUATERNION_SIZE];
+} godot_quaternion;
 #endif
 
 #include <gdnative/gdnative.h>
 
-void GDAPI godot_quat_new(godot_quat *p_self);
-void GDAPI godot_quat_new_copy(godot_quat *r_dest, const godot_quat *p_src);
-godot_real_t GDAPI *godot_quat_operator_index(godot_quat *p_self, godot_int p_index);
-const godot_real_t GDAPI *godot_quat_operator_index_const(const godot_quat *p_self, godot_int p_index);
+void GDAPI godot_quaternion_new(godot_quaternion *p_self);
+void GDAPI godot_quaternion_new_copy(godot_quaternion *r_dest, const godot_quaternion *p_src);
+godot_real_t GDAPI *godot_quaternion_operator_index(godot_quaternion *p_self, godot_int p_index);
+const godot_real_t GDAPI *godot_quaternion_operator_index_const(const godot_quaternion *p_self, godot_int p_index);
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif // GODOT_QUAT_H
+#endif // GODOT_QUATERNION_H
diff --git a/modules/gdnative/include/gdnative/variant.h b/modules/gdnative/include/gdnative/variant.h
index 6bc6435114..dd4f76cf57 100644
--- a/modules/gdnative/include/gdnative/variant.h
+++ b/modules/gdnative/include/gdnative/variant.h
@@ -56,7 +56,7 @@ typedef enum godot_variant_type {
 	GODOT_VARIANT_TYPE_VECTOR3I,
 	GODOT_VARIANT_TYPE_TRANSFORM2D,
 	GODOT_VARIANT_TYPE_PLANE,
-	GODOT_VARIANT_TYPE_QUAT,
+	GODOT_VARIANT_TYPE_QUATERNION,
 	GODOT_VARIANT_TYPE_AABB,
 	GODOT_VARIANT_TYPE_BASIS,
 	GODOT_VARIANT_TYPE_TRANSFORM3D,
@@ -177,7 +177,7 @@ typedef void (*godot_ptr_utility_function)(void *r_return, const void **p_argume
 #include <gdnative/node_path.h>
 #include <gdnative/packed_arrays.h>
 #include <gdnative/plane.h>
-#include <gdnative/quat.h>
+#include <gdnative/quaternion.h>
 #include <gdnative/rect2.h>
 #include <gdnative/rid.h>
 #include <gdnative/signal.h>
@@ -208,7 +208,7 @@ void GDAPI godot_variant_new_vector3(godot_variant *r_dest, const godot_vector3
 void GDAPI godot_variant_new_vector3i(godot_variant *r_dest, const godot_vector3i *p_v3);
 void GDAPI godot_variant_new_transform2d(godot_variant *r_dest, const godot_transform2d *p_t2d);
 void GDAPI godot_variant_new_plane(godot_variant *r_dest, const godot_plane *p_plane);
-void GDAPI godot_variant_new_quat(godot_variant *r_dest, const godot_quat *p_quat);
+void GDAPI godot_variant_new_quaternion(godot_variant *r_dest, const godot_quaternion *p_quaternion);
 void GDAPI godot_variant_new_aabb(godot_variant *r_dest, const godot_aabb *p_aabb);
 void GDAPI godot_variant_new_basis(godot_variant *r_dest, const godot_basis *p_basis);
 void GDAPI godot_variant_new_transform3d(godot_variant *r_dest, const godot_transform3d *p_trans);
@@ -243,7 +243,7 @@ godot_vector3 GDAPI godot_variant_as_vector3(const godot_variant *p_self);
 godot_vector3i GDAPI godot_variant_as_vector3i(const godot_variant *p_self);
 godot_transform2d GDAPI godot_variant_as_transform2d(const godot_variant *p_self);
 godot_plane GDAPI godot_variant_as_plane(const godot_variant *p_self);
-godot_quat GDAPI godot_variant_as_quat(const godot_variant *p_self);
+godot_quaternion GDAPI godot_variant_as_quaternion(const godot_variant *p_self);
 godot_aabb GDAPI godot_variant_as_aabb(const godot_variant *p_self);
 godot_basis GDAPI godot_variant_as_basis(const godot_variant *p_self);
 godot_transform3d GDAPI godot_variant_as_transform3d(const godot_variant *p_self);
diff --git a/modules/gdscript/gdscript_analyzer.cpp b/modules/gdscript/gdscript_analyzer.cpp
index a4786c5396..e92adee8e8 100644
--- a/modules/gdscript/gdscript_analyzer.cpp
+++ b/modules/gdscript/gdscript_analyzer.cpp
@@ -2825,7 +2825,7 @@ void GDScriptAnalyzer::reduce_subscript(GDScriptParser::SubscriptNode *p_subscri
 							case Variant::RECT2:
 							case Variant::RECT2I:
 							case Variant::PLANE:
-							case Variant::QUAT:
+							case Variant::QUATERNION:
 							case Variant::AABB:
 							case Variant::OBJECT:
 								error = index_type.builtin_type != Variant::STRING;
@@ -2904,7 +2904,7 @@ void GDScriptAnalyzer::reduce_subscript(GDScriptParser::SubscriptNode *p_subscri
 					case Variant::PACKED_FLOAT64_ARRAY:
 					case Variant::VECTOR2:
 					case Variant::VECTOR3:
-					case Variant::QUAT:
+					case Variant::QUATERNION:
 						result_type.builtin_type = Variant::FLOAT;
 						break;
 					// Return Color.
diff --git a/modules/gdscript/gdscript_byte_codegen.cpp b/modules/gdscript/gdscript_byte_codegen.cpp
index 6d7d0951b0..6998cc5bb7 100644
--- a/modules/gdscript/gdscript_byte_codegen.cpp
+++ b/modules/gdscript/gdscript_byte_codegen.cpp
@@ -85,7 +85,7 @@ uint32_t GDScriptByteCodeGenerator::add_temporary(const GDScriptDataType &p_type
 				case Variant::VECTOR3I:
 				case Variant::TRANSFORM2D:
 				case Variant::PLANE:
-				case Variant::QUAT:
+				case Variant::QUATERNION:
 				case Variant::AABB:
 				case Variant::BASIS:
 				case Variant::TRANSFORM3D:
@@ -458,8 +458,8 @@ void GDScriptByteCodeGenerator::write_type_adjust(const Address &p_target, Varia
 		case Variant::PLANE:
 			append(GDScriptFunction::OPCODE_TYPE_ADJUST_PLANE, 1);
 			break;
-		case Variant::QUAT:
-			append(GDScriptFunction::OPCODE_TYPE_ADJUST_QUAT, 1);
+		case Variant::QUATERNION:
+			append(GDScriptFunction::OPCODE_TYPE_ADJUST_QUATERNION, 1);
 			break;
 		case Variant::AABB:
 			append(GDScriptFunction::OPCODE_TYPE_ADJUST_AABB, 1);
@@ -1105,7 +1105,7 @@ void GDScriptByteCodeGenerator::write_call_ptrcall(const Address &p_target, cons
 			CASE_TYPE(STRING_NAME);
 			CASE_TYPE(NODE_PATH);
 			CASE_TYPE(RID);
-			CASE_TYPE(QUAT);
+			CASE_TYPE(QUATERNION);
 			CASE_TYPE(OBJECT);
 			CASE_TYPE(CALLABLE);
 			CASE_TYPE(SIGNAL);
diff --git a/modules/gdscript/gdscript_disassembler.cpp b/modules/gdscript/gdscript_disassembler.cpp
index 8aa64d7dcc..1acb9ceddc 100644
--- a/modules/gdscript/gdscript_disassembler.cpp
+++ b/modules/gdscript/gdscript_disassembler.cpp
@@ -625,7 +625,7 @@ void GDScriptFunction::disassemble(const Vector<String> &p_code_lines) const {
 				DISASSEMBLE_PTRCALL(STRING_NAME);
 				DISASSEMBLE_PTRCALL(NODE_PATH);
 				DISASSEMBLE_PTRCALL(RID);
-				DISASSEMBLE_PTRCALL(QUAT);
+				DISASSEMBLE_PTRCALL(QUATERNION);
 				DISASSEMBLE_PTRCALL(OBJECT);
 				DISASSEMBLE_PTRCALL(CALLABLE);
 				DISASSEMBLE_PTRCALL(SIGNAL);
@@ -957,7 +957,7 @@ void GDScriptFunction::disassemble(const Vector<String> &p_code_lines) const {
 				DISASSEMBLE_TYPE_ADJUST(VECTOR3I);
 				DISASSEMBLE_TYPE_ADJUST(TRANSFORM2D);
 				DISASSEMBLE_TYPE_ADJUST(PLANE);
-				DISASSEMBLE_TYPE_ADJUST(QUAT);
+				DISASSEMBLE_TYPE_ADJUST(QUATERNION);
 				DISASSEMBLE_TYPE_ADJUST(AABB);
 				DISASSEMBLE_TYPE_ADJUST(BASIS);
 				DISASSEMBLE_TYPE_ADJUST(TRANSFORM);
diff --git a/modules/gdscript/gdscript_function.h b/modules/gdscript/gdscript_function.h
index 658be9f364..cd1704cb03 100644
--- a/modules/gdscript/gdscript_function.h
+++ b/modules/gdscript/gdscript_function.h
@@ -278,7 +278,7 @@ public:
 		OPCODE_CALL_PTRCALL_VECTOR3I,
 		OPCODE_CALL_PTRCALL_TRANSFORM2D,
 		OPCODE_CALL_PTRCALL_PLANE,
-		OPCODE_CALL_PTRCALL_QUAT,
+		OPCODE_CALL_PTRCALL_QUATERNION,
 		OPCODE_CALL_PTRCALL_AABB,
 		OPCODE_CALL_PTRCALL_BASIS,
 		OPCODE_CALL_PTRCALL_TRANSFORM3D,
@@ -365,7 +365,7 @@ public:
 		OPCODE_TYPE_ADJUST_VECTOR3I,
 		OPCODE_TYPE_ADJUST_TRANSFORM2D,
 		OPCODE_TYPE_ADJUST_PLANE,
-		OPCODE_TYPE_ADJUST_QUAT,
+		OPCODE_TYPE_ADJUST_QUATERNION,
 		OPCODE_TYPE_ADJUST_AABB,
 		OPCODE_TYPE_ADJUST_BASIS,
 		OPCODE_TYPE_ADJUST_TRANSFORM,
diff --git a/modules/gdscript/gdscript_parser.cpp b/modules/gdscript/gdscript_parser.cpp
index 152b1ba23c..1af54ea8df 100644
--- a/modules/gdscript/gdscript_parser.cpp
+++ b/modules/gdscript/gdscript_parser.cpp
@@ -61,7 +61,7 @@ Variant::Type GDScriptParser::get_builtin_type(const StringName &p_type) {
 		builtin_types["Vector3i"] = Variant::VECTOR3I;
 		builtin_types["AABB"] = Variant::AABB;
 		builtin_types["Plane"] = Variant::PLANE;
-		builtin_types["Quat"] = Variant::QUAT;
+		builtin_types["Quaternion"] = Variant::QUATERNION;
 		builtin_types["Basis"] = Variant::BASIS;
 		builtin_types["Transform"] = Variant::TRANSFORM3D;
 		builtin_types["Color"] = Variant::COLOR;
diff --git a/modules/gdscript/gdscript_vm.cpp b/modules/gdscript/gdscript_vm.cpp
index d45d50287e..318ec966ae 100644
--- a/modules/gdscript/gdscript_vm.cpp
+++ b/modules/gdscript/gdscript_vm.cpp
@@ -166,7 +166,7 @@ void (*type_init_function_table[])(Variant *) = {
 	&VariantInitializer<Vector3i>::init, // VECTOR3I.
 	&VariantInitializer<Transform2D>::init, // TRANSFORM2D.
 	&VariantInitializer<Plane>::init, // PLANE.
-	&VariantInitializer<Quat>::init, // QUAT.
+	&VariantInitializer<Quaternion>::init, // QUATERNION.
 	&VariantInitializer<AABB>::init, // AABB.
 	&VariantInitializer<Basis>::init, // BASIS.
 	&VariantInitializer<Transform3D>::init, // TRANSFORM3D.
@@ -248,7 +248,7 @@ void (*type_init_function_table[])(Variant *) = {
 		&&OPCODE_CALL_PTRCALL_VECTOR3I,              \
 		&&OPCODE_CALL_PTRCALL_TRANSFORM2D,           \
 		&&OPCODE_CALL_PTRCALL_PLANE,                 \
-		&&OPCODE_CALL_PTRCALL_QUAT,                  \
+		&&OPCODE_CALL_PTRCALL_QUATERNION,            \
 		&&OPCODE_CALL_PTRCALL_AABB,                  \
 		&&OPCODE_CALL_PTRCALL_BASIS,                 \
 		&&OPCODE_CALL_PTRCALL_TRANSFORM3D,           \
@@ -335,7 +335,7 @@ void (*type_init_function_table[])(Variant *) = {
 		&&OPCODE_TYPE_ADJUST_VECTOR3I,               \
 		&&OPCODE_TYPE_ADJUST_TRANSFORM2D,            \
 		&&OPCODE_TYPE_ADJUST_PLANE,                  \
-		&&OPCODE_TYPE_ADJUST_QUAT,                   \
+		&&OPCODE_TYPE_ADJUST_QUATERNION,             \
 		&&OPCODE_TYPE_ADJUST_AABB,                   \
 		&&OPCODE_TYPE_ADJUST_BASIS,                  \
 		&&OPCODE_TYPE_ADJUST_TRANSFORM,              \
@@ -398,7 +398,7 @@ void (*type_init_function_table[])(Variant *) = {
 #define OP_GET_VECTOR3I get_vector3i
 #define OP_GET_RECT2 get_rect2
 #define OP_GET_RECT2I get_rect2i
-#define OP_GET_QUAT get_quat
+#define OP_GET_QUATERNION get_quaternion
 #define OP_GET_COLOR get_color
 #define OP_GET_STRING get_string
 #define OP_GET_STRING_NAME get_string_name
@@ -1733,7 +1733,7 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 			OPCODE_CALL_PTR(VECTOR3I);
 			OPCODE_CALL_PTR(TRANSFORM2D);
 			OPCODE_CALL_PTR(PLANE);
-			OPCODE_CALL_PTR(QUAT);
+			OPCODE_CALL_PTR(QUATERNION);
 			OPCODE_CALL_PTR(AABB);
 			OPCODE_CALL_PTR(BASIS);
 			OPCODE_CALL_PTR(TRANSFORM3D);
@@ -3150,7 +3150,7 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 			OPCODE_TYPE_ADJUST(VECTOR3I, Vector3i);
 			OPCODE_TYPE_ADJUST(TRANSFORM2D, Transform2D);
 			OPCODE_TYPE_ADJUST(PLANE, Plane);
-			OPCODE_TYPE_ADJUST(QUAT, Quat);
+			OPCODE_TYPE_ADJUST(QUATERNION, Quaternion);
 			OPCODE_TYPE_ADJUST(AABB, AABB);
 			OPCODE_TYPE_ADJUST(BASIS, Basis);
 			OPCODE_TYPE_ADJUST(TRANSFORM, Transform3D);
diff --git a/modules/gltf/doc_classes/GLTFNode.xml b/modules/gltf/doc_classes/GLTFNode.xml
index 33aad0028e..5d84d7088b 100644
--- a/modules/gltf/doc_classes/GLTFNode.xml
+++ b/modules/gltf/doc_classes/GLTFNode.xml
@@ -23,7 +23,7 @@
 		</member>
 		<member name="parent" type="int" setter="set_parent" getter="get_parent" default="-1">
 		</member>
-		<member name="rotation" type="Quat" setter="set_rotation" getter="get_rotation" default="Quat( 0, 0, 0, 1 )">
+		<member name="rotation" type="Quaternion" setter="set_rotation" getter="get_rotation" default="Quaternion( 0, 0, 0, 1 )">
 		</member>
 		<member name="scale" type="Vector3" setter="set_scale" getter="get_scale" default="Vector3( 1, 1, 1 )">
 		</member>
diff --git a/modules/gltf/gltf_animation.h b/modules/gltf/gltf_animation.h
index a494e6bd67..216d2161c4 100644
--- a/modules/gltf/gltf_animation.h
+++ b/modules/gltf/gltf_animation.h
@@ -56,7 +56,7 @@ public:
 
 	struct Track {
 		Channel<Vector3> translation_track;
-		Channel<Quat> rotation_track;
+		Channel<Quaternion> rotation_track;
 		Channel<Vector3> scale_track;
 		Vector<Channel<float>> weight_tracks;
 	};
diff --git a/modules/gltf/gltf_document.cpp b/modules/gltf/gltf_document.cpp
index c32f7619d8..fa93704fd9 100644
--- a/modules/gltf/gltf_document.cpp
+++ b/modules/gltf/gltf_document.cpp
@@ -342,19 +342,19 @@ static Vector3 _arr_to_vec3(const Array &p_array) {
 	return Vector3(p_array[0], p_array[1], p_array[2]);
 }
 
-static Array _quat_to_array(const Quat &p_quat) {
+static Array _quaternion_to_array(const Quaternion &p_quaternion) {
 	Array array;
 	array.resize(4);
-	array[0] = p_quat.x;
-	array[1] = p_quat.y;
-	array[2] = p_quat.z;
-	array[3] = p_quat.w;
+	array[0] = p_quaternion.x;
+	array[1] = p_quaternion.y;
+	array[2] = p_quaternion.z;
+	array[3] = p_quaternion.w;
 	return array;
 }
 
-static Quat _arr_to_quat(const Array &p_array) {
-	ERR_FAIL_COND_V(p_array.size() != 4, Quat());
-	return Quat(p_array[0], p_array[1], p_array[2], p_array[3]);
+static Quaternion _arr_to_quaternion(const Array &p_array) {
+	ERR_FAIL_COND_V(p_array.size() != 4, Quaternion());
+	return Quaternion(p_array[0], p_array[1], p_array[2], p_array[3]);
 }
 
 static Transform3D _arr_to_xform(const Array &p_array) {
@@ -425,8 +425,8 @@ Error GLTFDocument::_serialize_nodes(Ref<GLTFState> state) {
 			node["matrix"] = _xform_to_array(n->xform);
 		}
 
-		if (!n->rotation.is_equal_approx(Quat())) {
-			node["rotation"] = _quat_to_array(n->rotation);
+		if (!n->rotation.is_equal_approx(Quaternion())) {
+			node["rotation"] = _quaternion_to_array(n->rotation);
 		}
 
 		if (!n->scale.is_equal_approx(Vector3(1.0f, 1.0f, 1.0f))) {
@@ -591,13 +591,13 @@ Error GLTFDocument::_parse_nodes(Ref<GLTFState> state) {
 				node->translation = _arr_to_vec3(n["translation"]);
 			}
 			if (n.has("rotation")) {
-				node->rotation = _arr_to_quat(n["rotation"]);
+				node->rotation = _arr_to_quaternion(n["rotation"]);
 			}
 			if (n.has("scale")) {
 				node->scale = _arr_to_vec3(n["scale"]);
 			}
 
-			node->xform.basis.set_quat_scale(node->rotation, node->scale);
+			node->xform.basis.set_quaternion_scale(node->rotation, node->scale);
 			node->xform.origin = node->translation;
 		}
 
@@ -1779,7 +1779,7 @@ GLTFAccessorIndex GLTFDocument::_encode_accessor_as_joints(Ref<GLTFState> state,
 	return state->accessors.size() - 1;
 }
 
-GLTFAccessorIndex GLTFDocument::_encode_accessor_as_quats(Ref<GLTFState> state, const Vector<Quat> p_attribs, const bool p_for_vertex) {
+GLTFAccessorIndex GLTFDocument::_encode_accessor_as_quaternions(Ref<GLTFState> state, const Vector<Quaternion> p_attribs, const bool p_for_vertex) {
 	if (p_attribs.size() == 0) {
 		return -1;
 	}
@@ -1794,11 +1794,11 @@ GLTFAccessorIndex GLTFDocument::_encode_accessor_as_quats(Ref<GLTFState> state,
 	Vector<double> type_min;
 	type_min.resize(element_count);
 	for (int i = 0; i < p_attribs.size(); i++) {
-		Quat quat = p_attribs[i];
-		attribs.write[(i * element_count) + 0] = Math::snapped(quat.x, CMP_NORMALIZE_TOLERANCE);
-		attribs.write[(i * element_count) + 1] = Math::snapped(quat.y, CMP_NORMALIZE_TOLERANCE);
-		attribs.write[(i * element_count) + 2] = Math::snapped(quat.z, CMP_NORMALIZE_TOLERANCE);
-		attribs.write[(i * element_count) + 3] = Math::snapped(quat.w, CMP_NORMALIZE_TOLERANCE);
+		Quaternion quaternion = p_attribs[i];
+		attribs.write[(i * element_count) + 0] = Math::snapped(quaternion.x, CMP_NORMALIZE_TOLERANCE);
+		attribs.write[(i * element_count) + 1] = Math::snapped(quaternion.y, CMP_NORMALIZE_TOLERANCE);
+		attribs.write[(i * element_count) + 2] = Math::snapped(quaternion.z, CMP_NORMALIZE_TOLERANCE);
+		attribs.write[(i * element_count) + 3] = Math::snapped(quaternion.w, CMP_NORMALIZE_TOLERANCE);
 
 		_calc_accessor_min_max(i, element_count, type_max, attribs, type_min);
 	}
@@ -2053,9 +2053,9 @@ Vector<Color> GLTFDocument::_decode_accessor_as_color(Ref<GLTFState> state, cons
 	}
 	return ret;
 }
-Vector<Quat> GLTFDocument::_decode_accessor_as_quat(Ref<GLTFState> state, const GLTFAccessorIndex p_accessor, const bool p_for_vertex) {
+Vector<Quaternion> GLTFDocument::_decode_accessor_as_quaternion(Ref<GLTFState> state, const GLTFAccessorIndex p_accessor, const bool p_for_vertex) {
 	const Vector<double> attribs = _decode_accessor(state, p_accessor, p_for_vertex);
-	Vector<Quat> ret;
+	Vector<Quaternion> ret;
 
 	if (attribs.size() == 0) {
 		return ret;
@@ -2067,7 +2067,7 @@ Vector<Quat> GLTFDocument::_decode_accessor_as_quat(Ref<GLTFState> state, const
 	ret.resize(ret_size);
 	{
 		for (int i = 0; i < ret_size; i++) {
-			ret.write[i] = Quat(attribs_ptr[i * 4 + 0], attribs_ptr[i * 4 + 1], attribs_ptr[i * 4 + 2], attribs_ptr[i * 4 + 3]).normalized();
+			ret.write[i] = Quaternion(attribs_ptr[i * 4 + 0], attribs_ptr[i * 4 + 1], attribs_ptr[i * 4 + 2], attribs_ptr[i * 4 + 3]).normalized();
 		}
 	}
 	return ret;
@@ -4607,8 +4607,8 @@ Error GLTFDocument::_serialize_animations(Ref<GLTFState> state) {
 				s["interpolation"] = interpolation_to_string(track.rotation_track.interpolation);
 				Vector<real_t> times = Variant(track.rotation_track.times);
 				s["input"] = _encode_accessor_as_floats(state, times, false);
-				Vector<Quat> values = track.rotation_track.values;
-				s["output"] = _encode_accessor_as_quats(state, values, false);
+				Vector<Quaternion> values = track.rotation_track.values;
+				s["output"] = _encode_accessor_as_quaternions(state, values, false);
 
 				samplers.push_back(s);
 
@@ -4777,7 +4777,7 @@ Error GLTFDocument::_parse_animations(Ref<GLTFState> state) {
 				track->translation_track.times = Variant(times); //convert via variant
 				track->translation_track.values = Variant(translations); //convert via variant
 			} else if (path == "rotation") {
-				const Vector<Quat> rotations = _decode_accessor_as_quat(state, output, false);
+				const Vector<Quaternion> rotations = _decode_accessor_as_quaternion(state, output, false);
 				track->rotation_track.interpolation = interp;
 				track->rotation_track.times = Variant(times); //convert via variant
 				track->rotation_track.values = rotations;
@@ -5077,7 +5077,7 @@ GLTFSkeletonIndex GLTFDocument::_convert_skeleton(Ref<GLTFState> state, Skeleton
 void GLTFDocument::_convert_spatial(Ref<GLTFState> state, Node3D *p_spatial, Ref<GLTFNode> p_node) {
 	Transform3D xform = p_spatial->get_transform();
 	p_node->scale = xform.basis.get_scale();
-	p_node->rotation = xform.basis.get_rotation_quat();
+	p_node->rotation = xform.basis.get_rotation_quaternion();
 	p_node->translation = xform.origin;
 }
 
@@ -5274,9 +5274,9 @@ void GLTFDocument::_convert_mult_mesh_instance_to_gltf(Node *p_scene_parent, con
 				transform.origin =
 						Vector3(xform_2d.get_origin().x, 0, xform_2d.get_origin().y);
 				real_t rotation = xform_2d.get_rotation();
-				Quat quat(Vector3(0, 1, 0), rotation);
+				Quaternion quaternion(Vector3(0, 1, 0), rotation);
 				Size2 scale = xform_2d.get_scale();
-				transform.basis.set_quat_scale(quat,
+				transform.basis.set_quaternion_scale(quaternion,
 						Vector3(scale.x, 0, scale.y));
 				transform =
 						multi_mesh_instance->get_transform() * transform;
@@ -5516,24 +5516,24 @@ struct EditorSceneImporterGLTFInterpolate {
 
 // thank you for existing, partial specialization
 template <>
-struct EditorSceneImporterGLTFInterpolate<Quat> {
-	Quat lerp(const Quat &a, const Quat &b, const float c) const {
-		ERR_FAIL_COND_V_MSG(!a.is_normalized(), Quat(), "The quaternion \"a\" must be normalized.");
-		ERR_FAIL_COND_V_MSG(!b.is_normalized(), Quat(), "The quaternion \"b\" must be normalized.");
+struct EditorSceneImporterGLTFInterpolate<Quaternion> {
+	Quaternion lerp(const Quaternion &a, const Quaternion &b, const float c) const {
+		ERR_FAIL_COND_V_MSG(!a.is_normalized(), Quaternion(), "The quaternion \"a\" must be normalized.");
+		ERR_FAIL_COND_V_MSG(!b.is_normalized(), Quaternion(), "The quaternion \"b\" must be normalized.");
 
 		return a.slerp(b, c).normalized();
 	}
 
-	Quat catmull_rom(const Quat &p0, const Quat &p1, const Quat &p2, const Quat &p3, const float c) {
-		ERR_FAIL_COND_V_MSG(!p1.is_normalized(), Quat(), "The quaternion \"p1\" must be normalized.");
-		ERR_FAIL_COND_V_MSG(!p2.is_normalized(), Quat(), "The quaternion \"p2\" must be normalized.");
+	Quaternion catmull_rom(const Quaternion &p0, const Quaternion &p1, const Quaternion &p2, const Quaternion &p3, const float c) {
+		ERR_FAIL_COND_V_MSG(!p1.is_normalized(), Quaternion(), "The quaternion \"p1\" must be normalized.");
+		ERR_FAIL_COND_V_MSG(!p2.is_normalized(), Quaternion(), "The quaternion \"p2\" must be normalized.");
 
 		return p1.slerp(p2, c).normalized();
 	}
 
-	Quat bezier(const Quat start, const Quat control_1, const Quat control_2, const Quat end, const float t) {
-		ERR_FAIL_COND_V_MSG(!start.is_normalized(), Quat(), "The start quaternion must be normalized.");
-		ERR_FAIL_COND_V_MSG(!end.is_normalized(), Quat(), "The end quaternion must be normalized.");
+	Quaternion bezier(const Quaternion start, const Quaternion control_1, const Quaternion control_2, const Quaternion end, const float t) {
+		ERR_FAIL_COND_V_MSG(!start.is_normalized(), Quaternion(), "The start quaternion must be normalized.");
+		ERR_FAIL_COND_V_MSG(!end.is_normalized(), Quaternion(), "The end quaternion must be normalized.");
 
 		return start.slerp(end, t).normalized();
 	}
@@ -5681,7 +5681,7 @@ void GLTFDocument::_import_animation(Ref<GLTFState> state, AnimationPlayer *ap,
 			double time = 0.0;
 
 			Vector3 base_pos;
-			Quat base_rot;
+			Quaternion base_rot;
 			Vector3 base_scale = Vector3(1, 1, 1);
 
 			if (!track.rotation_track.values.size()) {
@@ -5699,7 +5699,7 @@ void GLTFDocument::_import_animation(Ref<GLTFState> state, AnimationPlayer *ap,
 			bool last = false;
 			while (true) {
 				Vector3 pos = base_pos;
-				Quat rot = base_rot;
+				Quaternion rot = base_rot;
 				Vector3 scale = base_scale;
 
 				if (track.translation_track.times.size()) {
@@ -5707,7 +5707,7 @@ void GLTFDocument::_import_animation(Ref<GLTFState> state, AnimationPlayer *ap,
 				}
 
 				if (track.rotation_track.times.size()) {
-					rot = _interpolate_track<Quat>(track.rotation_track.times, track.rotation_track.values, time, track.rotation_track.interpolation);
+					rot = _interpolate_track<Quaternion>(track.rotation_track.times, track.rotation_track.values, time, track.rotation_track.interpolation);
 				}
 
 				if (track.scale_track.times.size()) {
@@ -5716,14 +5716,14 @@ void GLTFDocument::_import_animation(Ref<GLTFState> state, AnimationPlayer *ap,
 
 				if (gltf_node->skeleton >= 0) {
 					Transform3D xform;
-					xform.basis.set_quat_scale(rot, scale);
+					xform.basis.set_quaternion_scale(rot, scale);
 					xform.origin = pos;
 
 					const Skeleton3D *skeleton = state->skeletons[gltf_node->skeleton]->godot_skeleton;
 					const int bone_idx = skeleton->find_bone(gltf_node->get_name());
 					xform = skeleton->get_bone_rest(bone_idx).affine_inverse() * xform;
 
-					rot = xform.basis.get_rotation_quat();
+					rot = xform.basis.get_rotation_quaternion();
 					rot.normalize();
 					scale = xform.basis.get_scale();
 					pos = xform.origin;
@@ -5810,7 +5810,7 @@ void GLTFDocument::_convert_mesh_instances(Ref<GLTFState> state) {
 		ERR_CONTINUE(!mi);
 		Transform3D mi_xform = mi->get_transform();
 		node->scale = mi_xform.basis.get_scale();
-		node->rotation = mi_xform.basis.get_rotation_quat();
+		node->rotation = mi_xform.basis.get_rotation_quaternion();
 		node->translation = mi_xform.origin;
 
 		Dictionary json_skin;
@@ -5874,7 +5874,7 @@ void GLTFDocument::_convert_mesh_instances(Ref<GLTFState> state) {
 
 			Transform3D bone_rest_xform = skeleton->get_bone_rest(bone_index);
 			joint_node->scale = bone_rest_xform.basis.get_scale();
-			joint_node->rotation = bone_rest_xform.basis.get_rotation_quat();
+			joint_node->rotation = bone_rest_xform.basis.get_rotation_quaternion();
 			joint_node->translation = bone_rest_xform.origin;
 			joint_node->joint = true;
 
@@ -6036,16 +6036,16 @@ GLTFAnimation::Track GLTFDocument::_convert_animation_track(Ref<GLTFState> state
 		p_track.rotation_track.interpolation = gltf_interpolation;
 		for (int32_t key_i = 0; key_i < key_count; key_i++) {
 			Vector3 translation;
-			Quat rotation;
+			Quaternion rotation;
 			Vector3 scale;
 			Error err = p_animation->transform_track_get_key(p_track_i, key_i, &translation, &rotation, &scale);
 			ERR_CONTINUE(err != OK);
 			Transform3D xform;
-			xform.basis.set_quat_scale(rotation, scale);
+			xform.basis.set_quaternion_scale(rotation, scale);
 			xform.origin = translation;
 			xform = p_bone_rest * xform;
 			p_track.translation_track.values.write[key_i] = xform.get_origin();
-			p_track.rotation_track.values.write[key_i] = xform.basis.get_rotation_quat();
+			p_track.rotation_track.values.write[key_i] = xform.basis.get_rotation_quaternion();
 			p_track.scale_track.values.write[key_i] = xform.basis.get_scale();
 		}
 	} else if (path.find(":transform") != -1) {
@@ -6065,7 +6065,7 @@ GLTFAnimation::Track GLTFDocument::_convert_animation_track(Ref<GLTFState> state
 		for (int32_t key_i = 0; key_i < key_count; key_i++) {
 			Transform3D xform = p_animation->track_get_key_value(p_track_i, key_i);
 			p_track.translation_track.values.write[key_i] = xform.get_origin();
-			p_track.rotation_track.values.write[key_i] = xform.basis.get_rotation_quat();
+			p_track.rotation_track.values.write[key_i] = xform.basis.get_rotation_quaternion();
 			p_track.scale_track.values.write[key_i] = xform.basis.get_scale();
 		}
 	} else if (track_type == Animation::TYPE_VALUE) {
@@ -6077,7 +6077,7 @@ GLTFAnimation::Track GLTFDocument::_convert_animation_track(Ref<GLTFState> state
 			p_track.rotation_track.interpolation = gltf_interpolation;
 
 			for (int32_t key_i = 0; key_i < key_count; key_i++) {
-				Quat rotation_track = p_animation->track_get_key_value(p_track_i, key_i);
+				Quaternion rotation_track = p_animation->track_get_key_value(p_track_i, key_i);
 				p_track.rotation_track.values.write[key_i] = rotation_track;
 			}
 		} else if (path.find(":translation") != -1) {
@@ -6104,7 +6104,7 @@ GLTFAnimation::Track GLTFDocument::_convert_animation_track(Ref<GLTFState> state
 				rotation_radian.x = Math::deg2rad(rotation_degrees.x);
 				rotation_radian.y = Math::deg2rad(rotation_degrees.y);
 				rotation_radian.z = Math::deg2rad(rotation_degrees.z);
-				p_track.rotation_track.values.write[key_i] = Quat(rotation_radian);
+				p_track.rotation_track.values.write[key_i] = Quaternion(rotation_radian);
 			}
 		} else if (path.find(":scale") != -1) {
 			p_track.scale_track.times = times;
diff --git a/modules/gltf/gltf_document.h b/modules/gltf/gltf_document.h
index 3076ddb8ad..514373c4f0 100644
--- a/modules/gltf/gltf_document.h
+++ b/modules/gltf/gltf_document.h
@@ -205,7 +205,7 @@ private:
 	Vector<Color> _decode_accessor_as_color(Ref<GLTFState> state,
 			const GLTFAccessorIndex p_accessor,
 			const bool p_for_vertex);
-	Vector<Quat> _decode_accessor_as_quat(Ref<GLTFState> state,
+	Vector<Quaternion> _decode_accessor_as_quaternion(Ref<GLTFState> state,
 			const GLTFAccessorIndex p_accessor,
 			const bool p_for_vertex);
 	Vector<Transform2D> _decode_accessor_as_xform2d(Ref<GLTFState> state,
@@ -273,8 +273,8 @@ private:
 	T _interpolate_track(const Vector<float> &p_times, const Vector<T> &p_values,
 			const float p_time,
 			const GLTFAnimation::Interpolation p_interp);
-	GLTFAccessorIndex _encode_accessor_as_quats(Ref<GLTFState> state,
-			const Vector<Quat> p_attribs,
+	GLTFAccessorIndex _encode_accessor_as_quaternions(Ref<GLTFState> state,
+			const Vector<Quaternion> p_attribs,
 			const bool p_for_vertex);
 	GLTFAccessorIndex _encode_accessor_as_weights(Ref<GLTFState> state,
 			const Vector<Color> p_attribs,
diff --git a/modules/gltf/gltf_node.cpp b/modules/gltf/gltf_node.cpp
index 759b52619d..5db7ad66c3 100644
--- a/modules/gltf/gltf_node.cpp
+++ b/modules/gltf/gltf_node.cpp
@@ -67,7 +67,7 @@ void GLTFNode::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "skeleton"), "set_skeleton", "get_skeleton"); // GLTFSkeletonIndex
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "joint"), "set_joint", "get_joint"); // bool
 	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "translation"), "set_translation", "get_translation"); // Vector3
-	ADD_PROPERTY(PropertyInfo(Variant::QUAT, "rotation"), "set_rotation", "get_rotation"); // Quat
+	ADD_PROPERTY(PropertyInfo(Variant::QUATERNION, "rotation"), "set_rotation", "get_rotation"); // Quaternion
 	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "scale"), "set_scale", "get_scale"); // Vector3
 	ADD_PROPERTY(PropertyInfo(Variant::PACKED_INT32_ARRAY, "children"), "set_children", "get_children"); // Vector<int>
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "light"), "set_light", "get_light"); // GLTFLightIndex
@@ -145,11 +145,11 @@ void GLTFNode::set_translation(Vector3 p_translation) {
 	translation = p_translation;
 }
 
-Quat GLTFNode::get_rotation() {
+Quaternion GLTFNode::get_rotation() {
 	return rotation;
 }
 
-void GLTFNode::set_rotation(Quat p_rotation) {
+void GLTFNode::set_rotation(Quaternion p_rotation) {
 	rotation = p_rotation;
 }
 
diff --git a/modules/gltf/gltf_node.h b/modules/gltf/gltf_node.h
index 6e6d9d5248..378b6da8bf 100644
--- a/modules/gltf/gltf_node.h
+++ b/modules/gltf/gltf_node.h
@@ -50,7 +50,7 @@ private:
 	GLTFSkeletonIndex skeleton = -1;
 	bool joint = false;
 	Vector3 translation;
-	Quat rotation;
+	Quaternion rotation;
 	Vector3 scale = Vector3(1, 1, 1);
 	Vector<int> children;
 	GLTFLightIndex light = -1;
@@ -86,8 +86,8 @@ public:
 	Vector3 get_translation();
 	void set_translation(Vector3 p_translation);
 
-	Quat get_rotation();
-	void set_rotation(Quat p_rotation);
+	Quaternion get_rotation();
+	void set_rotation(Quaternion p_rotation);
 
 	Vector3 get_scale();
 	void set_scale(Vector3 p_scale);
diff --git a/modules/mobile_vr/mobile_vr_interface.cpp b/modules/mobile_vr/mobile_vr_interface.cpp
index a0731f90f3..40b1745c35 100644
--- a/modules/mobile_vr/mobile_vr_interface.cpp
+++ b/modules/mobile_vr/mobile_vr_interface.cpp
@@ -185,8 +185,8 @@ void MobileVRInterface::set_position_from_sensors() {
 	// if you have a gyro + accelerometer that combo tends to be better than combining all three but without a gyro you need the magnetometer..
 	if (has_magneto && has_grav && !has_gyro) {
 		// convert to quaternions, easier to smooth those out
-		Quat transform_quat(orientation);
-		Quat acc_mag_quat(combine_acc_mag(grav, magneto));
+		Quaternion transform_quat(orientation);
+		Quaternion acc_mag_quat(combine_acc_mag(grav, magneto));
 		transform_quat = transform_quat.slerp(acc_mag_quat, 0.1);
 		orientation = Basis(transform_quat);
 
diff --git a/modules/mono/csharp_script.cpp b/modules/mono/csharp_script.cpp
index 1f07f58ecc..5406e17054 100644
--- a/modules/mono/csharp_script.cpp
+++ b/modules/mono/csharp_script.cpp
@@ -496,7 +496,7 @@ static String variant_type_to_managed_name(const String &p_var_type_name) {
 		Variant::VECTOR3I,
 		Variant::TRANSFORM2D,
 		Variant::PLANE,
-		Variant::QUAT,
+		Variant::QUATERNION,
 		Variant::AABB,
 		Variant::BASIS,
 		Variant::TRANSFORM3D,
diff --git a/modules/mono/editor/bindings_generator.cpp b/modules/mono/editor/bindings_generator.cpp
index c2707e46d9..94c5195b83 100644
--- a/modules/mono/editor/bindings_generator.cpp
+++ b/modules/mono/editor/bindings_generator.cpp
@@ -2523,7 +2523,7 @@ bool BindingsGenerator::_arg_default_value_is_assignable_to_type(const Variant &
 		case Variant::TRANSFORM2D:
 		case Variant::TRANSFORM3D:
 		case Variant::BASIS:
-		case Variant::QUAT:
+		case Variant::QUATERNION:
 		case Variant::PLANE:
 		case Variant::AABB:
 		case Variant::COLOR:
@@ -3142,12 +3142,12 @@ bool BindingsGenerator::_arg_default_value_from_variant(const Variant &p_val, Ar
 			}
 			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
 		} break;
-		case Variant::QUAT: {
-			Quat quat = p_val.operator Quat();
-			if (quat == Quat()) {
-				r_iarg.default_argument = "Quat.Identity";
+		case Variant::QUATERNION: {
+			Quaternion quaternion = p_val.operator Quaternion();
+			if (quaternion == Quaternion()) {
+				r_iarg.default_argument = "Quaternion.Identity";
 			} else {
-				r_iarg.default_argument = "new Quat" + quat.operator String();
+				r_iarg.default_argument = "new Quaternion" + quaternion.operator String();
 			}
 			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
 		} break;
@@ -3196,7 +3196,7 @@ void BindingsGenerator::_populate_builtin_type_interfaces() {
 	INSERT_STRUCT_TYPE(Vector3)
 	INSERT_STRUCT_TYPE(Vector3i)
 	INSERT_STRUCT_TYPE(Basis)
-	INSERT_STRUCT_TYPE(Quat)
+	INSERT_STRUCT_TYPE(Quaternion)
 	INSERT_STRUCT_TYPE(Transform3D)
 	INSERT_STRUCT_TYPE(AABB)
 	INSERT_STRUCT_TYPE(Color)
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Basis.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Basis.cs
index 3f1120575f..01525e593f 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Basis.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Basis.cs
@@ -207,7 +207,7 @@ namespace Godot
             }
         }
 
-        public Quat RotationQuat()
+        public Quaternion RotationQuaternion()
         {
             Basis orthonormalizedBasis = Orthonormalized();
             real_t det = orthonormalizedBasis.Determinant();
@@ -218,18 +218,18 @@ namespace Godot
                 orthonormalizedBasis = orthonormalizedBasis.Scaled(-Vector3.One);
             }
 
-            return orthonormalizedBasis.Quat();
+            return orthonormalizedBasis.Quaternion();
         }
 
-        internal void SetQuatScale(Quat quat, Vector3 scale)
+        internal void SetQuaternionScale(Quaternion quaternion, Vector3 scale)
         {
             SetDiagonal(scale);
-            Rotate(quat);
+            Rotate(quaternion);
         }
 
-        private void Rotate(Quat quat)
+        private void Rotate(Quaternion quaternion)
         {
-            this *= new Basis(quat);
+            this *= new Basis(quaternion);
         }
 
         private void SetDiagonal(Vector3 diagonal)
@@ -263,8 +263,8 @@ namespace Godot
         /// The returned vector contains the rotation angles in
         /// the format (X angle, Y angle, Z angle).
         ///
-        /// Consider using the <see cref="Basis.Quat()"/> method instead, which
-        /// returns a <see cref="Godot.Quat"/> quaternion instead of Euler angles.
+        /// Consider using the <see cref="Basis.Quaternion()"/> method instead, which
+        /// returns a <see cref="Godot.Quaternion"/> quaternion instead of Euler angles.
         /// </summary>
         /// <returns>A Vector3 representing the basis rotation in Euler angles.</returns>
         public Vector3 GetEuler()
@@ -486,8 +486,8 @@ namespace Godot
         /// <returns>The resulting basis matrix of the interpolation.</returns>
         public Basis Slerp(Basis target, real_t weight)
         {
-            Quat from = new Quat(this);
-            Quat to = new Quat(target);
+            Quaternion from = new Quaternion(this);
+            Quaternion to = new Quaternion(target);
 
             Basis b = new Basis(from.Slerp(to, weight));
             b.Row0 *= Mathf.Lerp(Row0.Length(), target.Row0.Length(), weight);
@@ -588,8 +588,8 @@ namespace Godot
         /// See <see cref="GetEuler()"/> if you need Euler angles, but keep in
         /// mind that quaternions should generally be preferred to Euler angles.
         /// </summary>
-        /// <returns>A <see cref="Godot.Quat"/> representing the basis's rotation.</returns>
-        public Quat Quat()
+        /// <returns>A <see cref="Godot.Quaternion"/> representing the basis's rotation.</returns>
+        public Quaternion Quaternion()
         {
             real_t trace = Row0[0] + Row1[1] + Row2[2];
 
@@ -597,7 +597,7 @@ namespace Godot
             {
                 real_t s = Mathf.Sqrt(trace + 1.0f) * 2f;
                 real_t inv_s = 1f / s;
-                return new Quat(
+                return new Quaternion(
                     (Row2[1] - Row1[2]) * inv_s,
                     (Row0[2] - Row2[0]) * inv_s,
                     (Row1[0] - Row0[1]) * inv_s,
@@ -609,7 +609,7 @@ namespace Godot
             {
                 real_t s = Mathf.Sqrt(Row0[0] - Row1[1] - Row2[2] + 1.0f) * 2f;
                 real_t inv_s = 1f / s;
-                return new Quat(
+                return new Quaternion(
                     s * 0.25f,
                     (Row0[1] + Row1[0]) * inv_s,
                     (Row0[2] + Row2[0]) * inv_s,
@@ -621,7 +621,7 @@ namespace Godot
             {
                 real_t s = Mathf.Sqrt(-Row0[0] + Row1[1] - Row2[2] + 1.0f) * 2f;
                 real_t inv_s = 1f / s;
-                return new Quat(
+                return new Quaternion(
                     (Row0[1] + Row1[0]) * inv_s,
                     s * 0.25f,
                     (Row1[2] + Row2[1]) * inv_s,
@@ -632,7 +632,7 @@ namespace Godot
             {
                 real_t s = Mathf.Sqrt(-Row0[0] - Row1[1] + Row2[2] + 1.0f) * 2f;
                 real_t inv_s = 1f / s;
-                return new Quat(
+                return new Quaternion(
                     (Row0[2] + Row2[0]) * inv_s,
                     (Row1[2] + Row2[1]) * inv_s,
                     s * 0.25f,
@@ -699,23 +699,23 @@ namespace Godot
         /// <summary>
         /// Constructs a pure rotation basis matrix from the given quaternion.
         /// </summary>
-        /// <param name="quat">The quaternion to create the basis from.</param>
-        public Basis(Quat quat)
+        /// <param name="quaternion">The quaternion to create the basis from.</param>
+        public Basis(Quaternion quaternion)
         {
-            real_t s = 2.0f / quat.LengthSquared;
+            real_t s = 2.0f / quaternion.LengthSquared;
 
-            real_t xs = quat.x * s;
-            real_t ys = quat.y * s;
-            real_t zs = quat.z * s;
-            real_t wx = quat.w * xs;
-            real_t wy = quat.w * ys;
-            real_t wz = quat.w * zs;
-            real_t xx = quat.x * xs;
-            real_t xy = quat.x * ys;
-            real_t xz = quat.x * zs;
-            real_t yy = quat.y * ys;
-            real_t yz = quat.y * zs;
-            real_t zz = quat.z * zs;
+            real_t xs = quaternion.x * s;
+            real_t ys = quaternion.y * s;
+            real_t zs = quaternion.z * s;
+            real_t wx = quaternion.w * xs;
+            real_t wy = quaternion.w * ys;
+            real_t wz = quaternion.w * zs;
+            real_t xx = quaternion.x * xs;
+            real_t xy = quaternion.x * ys;
+            real_t xz = quaternion.x * zs;
+            real_t yy = quaternion.y * ys;
+            real_t yz = quaternion.y * zs;
+            real_t zz = quaternion.z * zs;
 
             Row0 = new Vector3(1.0f - (yy + zz), xy - wz, xz + wy);
             Row1 = new Vector3(xy + wz, 1.0f - (xx + zz), yz - wx);
@@ -727,8 +727,8 @@ namespace Godot
         /// (in the YXZ convention: when *composing*, first Y, then X, and Z last),
         /// given in the vector format as (X angle, Y angle, Z angle).
         ///
-        /// Consider using the <see cref="Basis(Quat)"/> constructor instead, which
-        /// uses a <see cref="Godot.Quat"/> quaternion instead of Euler angles.
+        /// Consider using the <see cref="Basis(Quaternion)"/> constructor instead, which
+        /// uses a <see cref="Godot.Quaternion"/> quaternion instead of Euler angles.
         /// </summary>
         /// <param name="eulerYXZ">The Euler angles to create the basis from.</param>
         public Basis(Vector3 eulerYXZ)
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Quat.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Quaternion.cs
index bd3bcb0c58..b087b4c200 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Quat.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Quaternion.cs
@@ -15,7 +15,7 @@ namespace Godot
     /// It is similar to Basis, which implements matrix representation of
     /// rotations, and can be parametrized using both an axis-angle pair
     /// or Euler angles. Basis stores rotation, scale, and shearing,
-    /// while Quat only stores rotation.
+    /// while Quaternion only stores rotation.
     ///
     /// Due to its compactness and the way it is stored in memory, certain
     /// operations (obtaining axis-angle and performing SLERP, in particular)
@@ -23,7 +23,7 @@ namespace Godot
     /// </summary>
     [Serializable]
     [StructLayout(LayoutKind.Sequential)]
-    public struct Quat : IEquatable<Quat>
+    public struct Quaternion : IEquatable<Quaternion>
     {
         /// <summary>
         /// X component of the quaternion (imaginary `i` axis part).
@@ -122,11 +122,11 @@ namespace Godot
         /// <param name="postB">A quaternion after `b`.</param>
         /// <param name="weight">A value on the range of 0.0 to 1.0, representing the amount of interpolation.</param>
         /// <returns>The interpolated quaternion.</returns>
-        public Quat CubicSlerp(Quat b, Quat preA, Quat postB, real_t weight)
+        public Quaternion CubicSlerp(Quaternion b, Quaternion preA, Quaternion postB, real_t weight)
         {
             real_t t2 = (1.0f - weight) * weight * 2f;
-            Quat sp = Slerp(b, weight);
-            Quat sq = preA.Slerpni(postB, weight);
+            Quaternion sp = Slerp(b, weight);
+            Quaternion sq = preA.Slerpni(postB, weight);
             return sp.Slerpni(sq, t2);
         }
 
@@ -135,7 +135,7 @@ namespace Godot
         /// </summary>
         /// <param name="b">The other quaternion.</param>
         /// <returns>The dot product.</returns>
-        public real_t Dot(Quat b)
+        public real_t Dot(Quaternion b)
         {
             return x * b.x + y * b.y + z * b.z + w * b.w;
         }
@@ -152,7 +152,7 @@ namespace Godot
 #if DEBUG
             if (!IsNormalized())
             {
-                throw new InvalidOperationException("Quat is not normalized");
+                throw new InvalidOperationException("Quaternion is not normalized");
             }
 #endif
             var basis = new Basis(this);
@@ -163,15 +163,15 @@ namespace Godot
         /// Returns the inverse of the quaternion.
         /// </summary>
         /// <returns>The inverse quaternion.</returns>
-        public Quat Inverse()
+        public Quaternion Inverse()
         {
 #if DEBUG
             if (!IsNormalized())
             {
-                throw new InvalidOperationException("Quat is not normalized");
+                throw new InvalidOperationException("Quaternion is not normalized");
             }
 #endif
-            return new Quat(-x, -y, -z, w);
+            return new Quaternion(-x, -y, -z, w);
         }
 
         /// <summary>
@@ -187,7 +187,7 @@ namespace Godot
         /// Returns a copy of the quaternion, normalized to unit length.
         /// </summary>
         /// <returns>The normalized quaternion.</returns>
-        public Quat Normalized()
+        public Quaternion Normalized()
         {
             return this / Length;
         }
@@ -201,12 +201,12 @@ namespace Godot
         /// <param name="to">The destination quaternion for interpolation. Must be normalized.</param>
         /// <param name="weight">A value on the range of 0.0 to 1.0, representing the amount of interpolation.</param>
         /// <returns>The resulting quaternion of the interpolation.</returns>
-        public Quat Slerp(Quat to, real_t weight)
+        public Quaternion Slerp(Quaternion to, real_t weight)
         {
 #if DEBUG
             if (!IsNormalized())
             {
-                throw new InvalidOperationException("Quat is not normalized");
+                throw new InvalidOperationException("Quaternion is not normalized");
             }
             if (!to.IsNormalized())
             {
@@ -217,7 +217,7 @@ namespace Godot
             // Calculate cosine.
             real_t cosom = x * to.x + y * to.y + z * to.z + w * to.w;
 
-            var to1 = new Quat();
+            var to1 = new Quaternion();
 
             // Adjust signs if necessary.
             if (cosom < 0.0)
@@ -255,7 +255,7 @@ namespace Godot
             }
 
             // Calculate final values.
-            return new Quat
+            return new Quaternion
             (
                 scale0 * x + scale1 * to1.x,
                 scale0 * y + scale1 * to1.y,
@@ -272,7 +272,7 @@ namespace Godot
         /// <param name="to">The destination quaternion for interpolation. Must be normalized.</param>
         /// <param name="weight">A value on the range of 0.0 to 1.0, representing the amount of interpolation.</param>
         /// <returns>The resulting quaternion of the interpolation.</returns>
-        public Quat Slerpni(Quat to, real_t weight)
+        public Quaternion Slerpni(Quaternion to, real_t weight)
         {
             real_t dot = Dot(to);
 
@@ -286,7 +286,7 @@ namespace Godot
             real_t newFactor = Mathf.Sin(weight * theta) * sinT;
             real_t invFactor = Mathf.Sin((1.0f - weight) * theta) * sinT;
 
-            return new Quat
+            return new Quaternion
             (
                 invFactor * x + newFactor * to.x,
                 invFactor * y + newFactor * to.y,
@@ -305,7 +305,7 @@ namespace Godot
 #if DEBUG
             if (!IsNormalized())
             {
-                throw new InvalidOperationException("Quat is not normalized");
+                throw new InvalidOperationException("Quaternion is not normalized");
             }
 #endif
             var u = new Vector3(x, y, z);
@@ -314,15 +314,15 @@ namespace Godot
         }
 
         // Constants
-        private static readonly Quat _identity = new Quat(0, 0, 0, 1);
+        private static readonly Quaternion _identity = new Quaternion(0, 0, 0, 1);
 
         /// <summary>
         /// The identity quaternion, representing no rotation.
         /// Equivalent to an identity <see cref="Basis"/> matrix. If a vector is transformed by
         /// an identity quaternion, it will not change.
         /// </summary>
-        /// <value>Equivalent to `new Quat(0, 0, 0, 1)`.</value>
-        public static Quat Identity { get { return _identity; } }
+        /// <value>Equivalent to `new Quaternion(0, 0, 0, 1)`.</value>
+        public static Quaternion Identity { get { return _identity; } }
 
         /// <summary>
         /// Constructs a quaternion defined by the given values.
@@ -331,7 +331,7 @@ namespace Godot
         /// <param name="y">Y component of the quaternion (imaginary `j` axis part).</param>
         /// <param name="z">Z component of the quaternion (imaginary `k` axis part).</param>
         /// <param name="w">W component of the quaternion (real part).</param>
-        public Quat(real_t x, real_t y, real_t z, real_t w)
+        public Quaternion(real_t x, real_t y, real_t z, real_t w)
         {
             this.x = x;
             this.y = y;
@@ -343,7 +343,7 @@ namespace Godot
         /// Constructs a quaternion from the given quaternion.
         /// </summary>
         /// <param name="q">The existing quaternion.</param>
-        public Quat(Quat q)
+        public Quaternion(Quaternion q)
         {
             this = q;
         }
@@ -352,9 +352,9 @@ namespace Godot
         /// Constructs a quaternion from the given <see cref="Basis"/>.
         /// </summary>
         /// <param name="basis">The basis to construct from.</param>
-        public Quat(Basis basis)
+        public Quaternion(Basis basis)
         {
-            this = basis.Quat();
+            this = basis.Quaternion();
         }
 
         /// <summary>
@@ -364,7 +364,7 @@ namespace Godot
         /// given in the vector format as (X angle, Y angle, Z angle).
         /// </summary>
         /// <param name="eulerYXZ"></param>
-        public Quat(Vector3 eulerYXZ)
+        public Quaternion(Vector3 eulerYXZ)
         {
             real_t half_a1 = eulerYXZ.y * 0.5f;
             real_t half_a2 = eulerYXZ.x * 0.5f;
@@ -393,7 +393,7 @@ namespace Godot
         /// </summary>
         /// <param name="axis">The axis to rotate around. Must be normalized.</param>
         /// <param name="angle">The angle to rotate, in radians.</param>
-        public Quat(Vector3 axis, real_t angle)
+        public Quaternion(Vector3 axis, real_t angle)
         {
 #if DEBUG
             if (!axis.IsNormalized())
@@ -424,9 +424,9 @@ namespace Godot
             }
         }
 
-        public static Quat operator *(Quat left, Quat right)
+        public static Quaternion operator *(Quaternion left, Quaternion right)
         {
-            return new Quat
+            return new Quaternion
             (
                 left.w * right.x + left.x * right.w + left.y * right.z - left.z * right.y,
                 left.w * right.y + left.y * right.w + left.z * right.x - left.x * right.z,
@@ -435,24 +435,24 @@ namespace Godot
             );
         }
 
-        public static Quat operator +(Quat left, Quat right)
+        public static Quaternion operator +(Quaternion left, Quaternion right)
         {
-            return new Quat(left.x + right.x, left.y + right.y, left.z + right.z, left.w + right.w);
+            return new Quaternion(left.x + right.x, left.y + right.y, left.z + right.z, left.w + right.w);
         }
 
-        public static Quat operator -(Quat left, Quat right)
+        public static Quaternion operator -(Quaternion left, Quaternion right)
         {
-            return new Quat(left.x - right.x, left.y - right.y, left.z - right.z, left.w - right.w);
+            return new Quaternion(left.x - right.x, left.y - right.y, left.z - right.z, left.w - right.w);
         }
 
-        public static Quat operator -(Quat left)
+        public static Quaternion operator -(Quaternion left)
         {
-            return new Quat(-left.x, -left.y, -left.z, -left.w);
+            return new Quaternion(-left.x, -left.y, -left.z, -left.w);
         }
 
-        public static Quat operator *(Quat left, Vector3 right)
+        public static Quaternion operator *(Quaternion left, Vector3 right)
         {
-            return new Quat
+            return new Quaternion
             (
                 left.w * right.x + left.y * right.z - left.z * right.y,
                 left.w * right.y + left.z * right.x - left.x * right.z,
@@ -461,9 +461,9 @@ namespace Godot
             );
         }
 
-        public static Quat operator *(Vector3 left, Quat right)
+        public static Quaternion operator *(Vector3 left, Quaternion right)
         {
-            return new Quat
+            return new Quaternion
             (
                 right.w * left.x + right.y * left.z - right.z * left.y,
                 right.w * left.y + right.z * left.x - right.x * left.z,
@@ -472,42 +472,42 @@ namespace Godot
             );
         }
 
-        public static Quat operator *(Quat left, real_t right)
+        public static Quaternion operator *(Quaternion left, real_t right)
         {
-            return new Quat(left.x * right, left.y * right, left.z * right, left.w * right);
+            return new Quaternion(left.x * right, left.y * right, left.z * right, left.w * right);
         }
 
-        public static Quat operator *(real_t left, Quat right)
+        public static Quaternion operator *(real_t left, Quaternion right)
         {
-            return new Quat(right.x * left, right.y * left, right.z * left, right.w * left);
+            return new Quaternion(right.x * left, right.y * left, right.z * left, right.w * left);
         }
 
-        public static Quat operator /(Quat left, real_t right)
+        public static Quaternion operator /(Quaternion left, real_t right)
         {
             return left * (1.0f / right);
         }
 
-        public static bool operator ==(Quat left, Quat right)
+        public static bool operator ==(Quaternion left, Quaternion right)
         {
             return left.Equals(right);
         }
 
-        public static bool operator !=(Quat left, Quat right)
+        public static bool operator !=(Quaternion left, Quaternion right)
         {
             return !left.Equals(right);
         }
 
         public override bool Equals(object obj)
         {
-            if (obj is Quat)
+            if (obj is Quaternion)
             {
-                return Equals((Quat)obj);
+                return Equals((Quaternion)obj);
             }
 
             return false;
         }
 
-        public bool Equals(Quat other)
+        public bool Equals(Quaternion other)
         {
             return x == other.x && y == other.y && z == other.z && w == other.w;
         }
@@ -518,7 +518,7 @@ namespace Godot
         /// </summary>
         /// <param name="other">The other quaternion to compare.</param>
         /// <returns>Whether or not the quaternions are approximately equal.</returns>
-        public bool IsEqualApprox(Quat other)
+        public bool IsEqualApprox(Quaternion other)
         {
             return Mathf.IsEqualApprox(x, other.x) && Mathf.IsEqualApprox(y, other.y) && Mathf.IsEqualApprox(z, other.z) && Mathf.IsEqualApprox(w, other.w);
         }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Transform3D.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Transform3D.cs
index 9e5ff2b315..50cc95fb95 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Transform3D.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Transform3D.cs
@@ -124,15 +124,15 @@ namespace Godot
             /* not sure if very "efficient" but good enough? */
 
             Vector3 sourceScale = basis.Scale;
-            Quat sourceRotation = basis.RotationQuat();
+            Quaternion sourceRotation = basis.RotationQuaternion();
             Vector3 sourceLocation = origin;
 
             Vector3 destinationScale = transform.basis.Scale;
-            Quat destinationRotation = transform.basis.RotationQuat();
+            Quaternion destinationRotation = transform.basis.RotationQuaternion();
             Vector3 destinationLocation = transform.origin;
 
             var interpolated = new Transform3D();
-            interpolated.basis.SetQuatScale(sourceRotation.Slerp(destinationRotation, weight).Normalized(), sourceScale.Lerp(destinationScale, weight));
+            interpolated.basis.SetQuaternionScale(sourceRotation.Slerp(destinationRotation, weight).Normalized(), sourceScale.Lerp(destinationScale, weight));
             interpolated.origin = sourceLocation.Lerp(destinationLocation, weight);
 
             return interpolated;
@@ -324,11 +324,11 @@ namespace Godot
         /// <summary>
         /// Constructs a transformation matrix from the given quaternion and origin vector.
         /// </summary>
-        /// <param name="quat">The <see cref="Godot.Quat"/> to create the basis from.</param>
+        /// <param name="quaternion">The <see cref="Godot.Quaternion"/> to create the basis from.</param>
         /// <param name="origin">The origin vector, or column index 3.</param>
-        public Transform3D(Quat quat, Vector3 origin)
+        public Transform3D(Quaternion quaternion, Vector3 origin)
         {
-            basis = new Basis(quat);
+            basis = new Basis(quaternion);
             this.origin = origin;
         }
 
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj b/modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj
index c3dd13d84b..1fcfe74c86 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj
+++ b/modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj
@@ -50,7 +50,7 @@
     <Compile Include="Core\NodePath.cs" />
     <Compile Include="Core\Object.base.cs" />
     <Compile Include="Core\Plane.cs" />
-    <Compile Include="Core\Quat.cs" />
+    <Compile Include="Core\Quaternion.cs" />
     <Compile Include="Core\Rect2.cs" />
     <Compile Include="Core\Rect2i.cs" />
     <Compile Include="Core\RID.cs" />
diff --git a/modules/mono/mono_gd/gd_mono_cache.cpp b/modules/mono/mono_gd/gd_mono_cache.cpp
index adb0518cd6..341ca88728 100644
--- a/modules/mono/mono_gd/gd_mono_cache.cpp
+++ b/modules/mono/mono_gd/gd_mono_cache.cpp
@@ -109,7 +109,7 @@ void CachedData::clear_godot_api_cache() {
 	class_Vector3 = nullptr;
 	class_Vector3i = nullptr;
 	class_Basis = nullptr;
-	class_Quat = nullptr;
+	class_Quaternion = nullptr;
 	class_Transform3D = nullptr;
 	class_AABB = nullptr;
 	class_Color = nullptr;
@@ -238,7 +238,7 @@ void update_godot_api_cache() {
 	CACHE_CLASS_AND_CHECK(Vector3, GODOT_API_CLASS(Vector3));
 	CACHE_CLASS_AND_CHECK(Vector3i, GODOT_API_CLASS(Vector3i));
 	CACHE_CLASS_AND_CHECK(Basis, GODOT_API_CLASS(Basis));
-	CACHE_CLASS_AND_CHECK(Quat, GODOT_API_CLASS(Quat));
+	CACHE_CLASS_AND_CHECK(Quaternion, GODOT_API_CLASS(Quaternion));
 	CACHE_CLASS_AND_CHECK(Transform3D, GODOT_API_CLASS(Transform3D));
 	CACHE_CLASS_AND_CHECK(AABB, GODOT_API_CLASS(AABB));
 	CACHE_CLASS_AND_CHECK(Color, GODOT_API_CLASS(Color));
diff --git a/modules/mono/mono_gd/gd_mono_cache.h b/modules/mono/mono_gd/gd_mono_cache.h
index a332d492b9..3d867060f5 100644
--- a/modules/mono/mono_gd/gd_mono_cache.h
+++ b/modules/mono/mono_gd/gd_mono_cache.h
@@ -80,7 +80,7 @@ struct CachedData {
 	GDMonoClass *class_Vector3;
 	GDMonoClass *class_Vector3i;
 	GDMonoClass *class_Basis;
-	GDMonoClass *class_Quat;
+	GDMonoClass *class_Quaternion;
 	GDMonoClass *class_Transform3D;
 	GDMonoClass *class_AABB;
 	GDMonoClass *class_Color;
diff --git a/modules/mono/mono_gd/gd_mono_field.cpp b/modules/mono/mono_gd/gd_mono_field.cpp
index 97e3fe1677..111eaa0bbf 100644
--- a/modules/mono/mono_gd/gd_mono_field.cpp
+++ b/modules/mono/mono_gd/gd_mono_field.cpp
@@ -146,8 +146,8 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 				break;
 			}
 
-			if (tclass == CACHED_CLASS(Quat)) {
-				GDMonoMarshal::M_Quat from = MARSHALLED_OUT(Quat, p_value.operator ::Quat());
+			if (tclass == CACHED_CLASS(Quaternion)) {
+				GDMonoMarshal::M_Quaternion from = MARSHALLED_OUT(Quaternion, p_value.operator ::Quaternion());
 				mono_field_set_value(p_object, mono_field, &from);
 				break;
 			}
@@ -336,8 +336,8 @@ void GDMonoField::set_value_from_variant(MonoObject *p_object, const Variant &p_
 					GDMonoMarshal::M_Plane from = MARSHALLED_OUT(Plane, p_value.operator ::Plane());
 					mono_field_set_value(p_object, mono_field, &from);
 				} break;
-				case Variant::QUAT: {
-					GDMonoMarshal::M_Quat from = MARSHALLED_OUT(Quat, p_value.operator ::Quat());
+				case Variant::QUATERNION: {
+					GDMonoMarshal::M_Quaternion from = MARSHALLED_OUT(Quaternion, p_value.operator ::Quaternion());
 					mono_field_set_value(p_object, mono_field, &from);
 				} break;
 				case Variant::AABB: {
diff --git a/modules/mono/mono_gd/gd_mono_marshal.cpp b/modules/mono/mono_gd/gd_mono_marshal.cpp
index 0623755263..c8f80e7777 100644
--- a/modules/mono/mono_gd/gd_mono_marshal.cpp
+++ b/modules/mono/mono_gd/gd_mono_marshal.cpp
@@ -104,8 +104,8 @@ Variant::Type managed_to_variant_type(const ManagedType &p_type, bool *r_nil_is_
 				return Variant::BASIS;
 			}
 
-			if (vtclass == CACHED_CLASS(Quat)) {
-				return Variant::QUAT;
+			if (vtclass == CACHED_CLASS(Quaternion)) {
+				return Variant::QUATERNION;
 			}
 
 			if (vtclass == CACHED_CLASS(Transform3D)) {
@@ -508,9 +508,9 @@ MonoObject *variant_to_mono_object(const Variant &p_var) {
 			GDMonoMarshal::M_Plane from = MARSHALLED_OUT(Plane, p_var.operator ::Plane());
 			return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(Plane), &from);
 		}
-		case Variant::QUAT: {
-			GDMonoMarshal::M_Quat from = MARSHALLED_OUT(Quat, p_var.operator ::Quat());
-			return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(Quat), &from);
+		case Variant::QUATERNION: {
+			GDMonoMarshal::M_Quaternion from = MARSHALLED_OUT(Quaternion, p_var.operator ::Quaternion());
+			return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(Quaternion), &from);
 		}
 		case Variant::AABB: {
 			GDMonoMarshal::M_AABB from = MARSHALLED_OUT(AABB, p_var.operator ::AABB());
@@ -619,7 +619,7 @@ size_t variant_get_managed_unboxed_size(const ManagedType &p_type) {
 			RETURN_CHECK_FOR_STRUCT(Vector3);
 			RETURN_CHECK_FOR_STRUCT(Vector3i);
 			RETURN_CHECK_FOR_STRUCT(Basis);
-			RETURN_CHECK_FOR_STRUCT(Quat);
+			RETURN_CHECK_FOR_STRUCT(Quaternion);
 			RETURN_CHECK_FOR_STRUCT(Transform3D);
 			RETURN_CHECK_FOR_STRUCT(AABB);
 			RETURN_CHECK_FOR_STRUCT(Color);
@@ -724,7 +724,7 @@ void *variant_to_managed_unboxed(const Variant &p_var, const ManagedType &p_type
 			RETURN_CHECK_FOR_STRUCT(Vector3);
 			RETURN_CHECK_FOR_STRUCT(Vector3i);
 			RETURN_CHECK_FOR_STRUCT(Basis);
-			RETURN_CHECK_FOR_STRUCT(Quat);
+			RETURN_CHECK_FOR_STRUCT(Quaternion);
 			RETURN_CHECK_FOR_STRUCT(Transform3D);
 			RETURN_CHECK_FOR_STRUCT(AABB);
 			RETURN_CHECK_FOR_STRUCT(Color);
@@ -880,7 +880,7 @@ MonoObject *variant_to_mono_object(const Variant &p_var, const ManagedType &p_ty
 			RETURN_CHECK_FOR_STRUCT(Vector3);
 			RETURN_CHECK_FOR_STRUCT(Vector3i);
 			RETURN_CHECK_FOR_STRUCT(Basis);
-			RETURN_CHECK_FOR_STRUCT(Quat);
+			RETURN_CHECK_FOR_STRUCT(Quaternion);
 			RETURN_CHECK_FOR_STRUCT(Transform3D);
 			RETURN_CHECK_FOR_STRUCT(AABB);
 			RETURN_CHECK_FOR_STRUCT(Color);
@@ -1036,8 +1036,8 @@ Variant mono_object_to_variant_impl(MonoObject *p_obj, const ManagedType &p_type
 				return MARSHALLED_IN(Basis, unbox_addr<GDMonoMarshal::M_Basis>(p_obj));
 			}
 
-			if (vtclass == CACHED_CLASS(Quat)) {
-				return MARSHALLED_IN(Quat, unbox_addr<GDMonoMarshal::M_Quat>(p_obj));
+			if (vtclass == CACHED_CLASS(Quaternion)) {
+				return MARSHALLED_IN(Quaternion, unbox_addr<GDMonoMarshal::M_Quaternion>(p_obj));
 			}
 
 			if (vtclass == CACHED_CLASS(Transform3D)) {
diff --git a/modules/mono/mono_gd/gd_mono_marshal.h b/modules/mono/mono_gd/gd_mono_marshal.h
index 141d6a66bd..88afc7ebc5 100644
--- a/modules/mono/mono_gd/gd_mono_marshal.h
+++ b/modules/mono/mono_gd/gd_mono_marshal.h
@@ -263,11 +263,11 @@ enum {
 
 	MATCHES_Basis = (MATCHES_Vector3 && (sizeof(Basis) == (sizeof(Vector3) * 3))), // No field offset required, it stores an array
 
-	MATCHES_Quat = (MATCHES_real_t && (sizeof(Quat) == (sizeof(real_t) * 4)) &&
-					offsetof(Quat, x) == (sizeof(real_t) * 0) &&
-					offsetof(Quat, y) == (sizeof(real_t) * 1) &&
-					offsetof(Quat, z) == (sizeof(real_t) * 2) &&
-					offsetof(Quat, w) == (sizeof(real_t) * 3)),
+	MATCHES_Quaternion = (MATCHES_real_t && (sizeof(Quaternion) == (sizeof(real_t) * 4)) &&
+						  offsetof(Quaternion, x) == (sizeof(real_t) * 0) &&
+						  offsetof(Quaternion, y) == (sizeof(real_t) * 1) &&
+						  offsetof(Quaternion, z) == (sizeof(real_t) * 2) &&
+						  offsetof(Quaternion, w) == (sizeof(real_t) * 3)),
 
 	MATCHES_Transform3D = (MATCHES_Basis && MATCHES_Vector3 && (sizeof(Transform3D) == (sizeof(Basis) + sizeof(Vector3))) &&
 						   offsetof(Transform3D, basis) == 0 &&
@@ -292,7 +292,7 @@ enum {
 #ifdef GD_MONO_FORCE_INTEROP_STRUCT_COPY
 /* clang-format off */
 static_assert(MATCHES_Vector2 && MATCHES_Rect2 && MATCHES_Transform2D && MATCHES_Vector3 &&
-				MATCHES_Basis && MATCHES_Quat && MATCHES_Transform3D && MATCHES_AABB && MATCHES_Color &&
+				MATCHES_Basis && MATCHES_Quaternion && MATCHES_Transform3D && MATCHES_AABB && MATCHES_Color &&
 				MATCHES_Plane && MATCHES_Vector2i && MATCHES_Rect2i && MATCHES_Vector3i);
 /* clang-format on */
 #endif
@@ -420,15 +420,15 @@ struct M_Basis {
 	}
 };
 
-struct M_Quat {
+struct M_Quaternion {
 	real_t x, y, z, w;
 
-	static _FORCE_INLINE_ Quat convert_to(const M_Quat &p_from) {
-		return Quat(p_from.x, p_from.y, p_from.z, p_from.w);
+	static _FORCE_INLINE_ Quaternion convert_to(const M_Quaternion &p_from) {
+		return Quaternion(p_from.x, p_from.y, p_from.z, p_from.w);
 	}
 
-	static _FORCE_INLINE_ M_Quat convert_from(const Quat &p_from) {
-		M_Quat ret = { p_from.x, p_from.y, p_from.z, p_from.w };
+	static _FORCE_INLINE_ M_Quaternion convert_from(const Quaternion &p_from) {
+		M_Quaternion ret = { p_from.x, p_from.y, p_from.z, p_from.w };
 		return ret;
 	}
 };
@@ -533,7 +533,7 @@ DECL_TYPE_MARSHAL_TEMPLATES(Transform2D)
 DECL_TYPE_MARSHAL_TEMPLATES(Vector3)
 DECL_TYPE_MARSHAL_TEMPLATES(Vector3i)
 DECL_TYPE_MARSHAL_TEMPLATES(Basis)
-DECL_TYPE_MARSHAL_TEMPLATES(Quat)
+DECL_TYPE_MARSHAL_TEMPLATES(Quaternion)
 DECL_TYPE_MARSHAL_TEMPLATES(Transform3D)
 DECL_TYPE_MARSHAL_TEMPLATES(AABB)
 DECL_TYPE_MARSHAL_TEMPLATES(Color)
diff --git a/modules/visual_script/visual_script_editor.cpp b/modules/visual_script/visual_script_editor.cpp
index 779f366c86..9de316d4d2 100644
--- a/modules/visual_script/visual_script_editor.cpp
+++ b/modules/visual_script/visual_script_editor.cpp
@@ -381,7 +381,7 @@ static Color _color_from_type(Variant::Type p_type, bool dark_theme = true) {
 			case Variant::PLANE:
 				color = Color(0.97, 0.44, 0.44);
 				break;
-			case Variant::QUAT:
+			case Variant::QUATERNION:
 				color = Color(0.93, 0.41, 0.64);
 				break;
 			case Variant::AABB:
@@ -487,7 +487,7 @@ static Color _color_from_type(Variant::Type p_type, bool dark_theme = true) {
 			case Variant::PLANE:
 				color = Color(0.97, 0.44, 0.44);
 				break;
-			case Variant::QUAT:
+			case Variant::QUATERNION:
 				color = Color(0.93, 0.41, 0.64);
 				break;
 			case Variant::AABB:
diff --git a/modules/visual_script/visual_script_nodes.cpp b/modules/visual_script/visual_script_nodes.cpp
index 2dd18a492c..07dc3dfaf6 100644
--- a/modules/visual_script/visual_script_nodes.cpp
+++ b/modules/visual_script/visual_script_nodes.cpp
@@ -3918,7 +3918,7 @@ void register_visual_script_nodes() {
 	VisualScriptLanguage::singleton->add_register_func("functions/deconstruct/" + Variant::get_type_name(Variant::Type::RECT2I), create_node_deconst_typed<Variant::Type::RECT2I>);
 	VisualScriptLanguage::singleton->add_register_func("functions/deconstruct/" + Variant::get_type_name(Variant::Type::TRANSFORM2D), create_node_deconst_typed<Variant::Type::TRANSFORM2D>);
 	VisualScriptLanguage::singleton->add_register_func("functions/deconstruct/" + Variant::get_type_name(Variant::Type::PLANE), create_node_deconst_typed<Variant::Type::PLANE>);
-	VisualScriptLanguage::singleton->add_register_func("functions/deconstruct/" + Variant::get_type_name(Variant::Type::QUAT), create_node_deconst_typed<Variant::Type::QUAT>);
+	VisualScriptLanguage::singleton->add_register_func("functions/deconstruct/" + Variant::get_type_name(Variant::Type::QUATERNION), create_node_deconst_typed<Variant::Type::QUATERNION>);
 	VisualScriptLanguage::singleton->add_register_func("functions/deconstruct/" + Variant::get_type_name(Variant::Type::AABB), create_node_deconst_typed<Variant::Type::AABB>);
 	VisualScriptLanguage::singleton->add_register_func("functions/deconstruct/" + Variant::get_type_name(Variant::Type::BASIS), create_node_deconst_typed<Variant::Type::BASIS>);
 	VisualScriptLanguage::singleton->add_register_func("functions/deconstruct/" + Variant::get_type_name(Variant::Type::TRANSFORM3D), create_node_deconst_typed<Variant::Type::TRANSFORM3D>);