Use right handed coordinate system for rotation matrices and quaternions. Also fixes Euler angles (XYZ convention, which is used as default by Blender).

Furthermore, functions which expect a rotation matrix will now give an error simply, rather than trying to orthonormalize such matrices. The documentation for such functions has be updated accordingly.

This commit breaks code using 3D rotations, and is a part of the breaking changes in 2.1 -> 3.0 transition. The code affected within Godot code base is fixed in this commit.

1 files changed, 11 insertions, 11 deletions

diff --git a/tools/editor/plugins/spatial_editor_plugin.cpp b/tools/editor/plugins/spatial_editor_plugin.cpp
index 44d3b63335..70a256fd2c 100644
--- a/tools/editor/plugins/spatial_editor_plugin.cpp
+++ b/tools/editor/plugins/spatial_editor_plugin.cpp
@@ -61,8 +61,8 @@ void SpatialEditorViewport::_update_camera() {
 
 	Transform camera_transform;
 	camera_transform.translate(cursor.pos);
-	camera_transform.basis.rotate(Vector3(0, 1, 0), cursor.y_rot);
-	camera_transform.basis.rotate(Vector3(1, 0, 0), cursor.x_rot);
+	camera_transform.basis.rotate(Vector3(0, 1, 0), -cursor.y_rot);
+	camera_transform.basis.rotate(Vector3(1, 0, 0), -cursor.x_rot);
 
 	if (orthogonal)
 		camera_transform.translate(0, 0, 4096);
@@ -474,8 +474,8 @@ Vector3 SpatialEditorViewport::_get_screen_to_space(const Vector3& p_pos) {
 
 	Transform camera_transform;
 	camera_transform.translate( cursor.pos );
-	camera_transform.basis.rotate(Vector3(0,1,0),cursor.y_rot);
-	camera_transform.basis.rotate(Vector3(1,0,0),cursor.x_rot);
+	camera_transform.basis.rotate(Vector3(0,1,0),-cursor.y_rot);
+	camera_transform.basis.rotate(Vector3(1,0,0),-cursor.x_rot);
 	camera_transform.translate(0,0,cursor.distance);
 
 	return camera_transform.xform(Vector3( ((p_pos.x/get_size().width)*2.0-1.0)*screen_w, ((1.0-(p_pos.y/get_size().height))*2.0-1.0)*screen_h,-get_znear()));
@@ -1484,7 +1484,7 @@ void SpatialEditorViewport::_sinput(const InputEvent &p_event) {
 
 
 							Transform r;
-							r.basis.rotate(plane.normal,-angle);
+							r.basis.rotate(plane.normal,angle);
 
 							List<Node*> &selection = editor_selection->get_selected_node_list();
 
@@ -1591,8 +1591,8 @@ void SpatialEditorViewport::_sinput(const InputEvent &p_event) {
 					Transform camera_transform;
 
 					camera_transform.translate(cursor.pos);
-					camera_transform.basis.rotate(Vector3(0,1,0),cursor.y_rot);
-					camera_transform.basis.rotate(Vector3(1,0,0),cursor.x_rot);
+					camera_transform.basis.rotate(Vector3(0,1,0),-cursor.y_rot);
+					camera_transform.basis.rotate(Vector3(1,0,0),-cursor.x_rot);
 					Vector3 translation(-m.relative_x*pan_speed,m.relative_y*pan_speed,0);
 					translation*=cursor.distance/DISTANCE_DEFAULT;
 					camera_transform.translate(translation);
@@ -2810,7 +2810,7 @@ void SpatialEditor::_xform_dialog_action() {
 			continue;
 		Vector3 axis;
 		axis[i]=1.0;
-		t.basis.rotate(axis,rotate[i]);
+		t.basis.rotate(axis,rotate[i]); // BUG(?): Angle not flipped; please check during the review of PR #6865.
 	}
 
 	for(int i=0;i<3;i++) {
@@ -3160,7 +3160,7 @@ void SpatialEditor::_init_indicators() {
 
 
 
-	light_transform.rotate(Vector3(1,0,0),Math_PI/5.0);
+	light_transform.rotate(Vector3(1,0,0),-Math_PI/5.0);
 	VisualServer::get_singleton()->instance_set_transform(light_instance,light_transform);
 
 
@@ -3773,8 +3773,8 @@ void SpatialEditor::_update_ambient_light_color(const Color& p_color) {
 void SpatialEditor::_update_default_light_angle() {
 
 	Transform t;
-	t.basis.rotate(Vector3(1,0,0),settings_default_light_rot_x);
-	t.basis.rotate(Vector3(0,1,0),settings_default_light_rot_y);
+	t.basis.rotate(Vector3(1,0,0),-settings_default_light_rot_x);
+	t.basis.rotate(Vector3(0,1,0),-settings_default_light_rot_y);
 	settings_dlight->set_transform(t);
 	if (light_instance.is_valid()) {
 		VS::get_singleton()->instance_set_transform(light_instance,t);