Rename Curve/Curve2D/Curve3D/Gradient `interpolate()` to `sample()`

"sampling" is a more accurate term than "interpolating" for what's
happening when using that function.

13 files changed, 109 insertions, 109 deletions

diff --git a/scene/2d/cpu_particles_2d.cpp b/scene/2d/cpu_particles_2d.cpp
index dfe2ce0ec3..58e357ab5f 100644
--- a/scene/2d/cpu_particles_2d.cpp
+++ b/scene/2d/cpu_particles_2d.cpp
@@ -719,17 +719,17 @@ void CPUParticles2D::_particles_process(double p_delta) {
 
 			/*real_t tex_linear_velocity = 0;
 			if (curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY].is_valid()) {
-				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->interpolate(0);
+				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->sample(0);
 			}*/
 
 			real_t tex_angle = 0.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
-				tex_angle = curve_parameters[PARAM_ANGLE]->interpolate(tv);
+				tex_angle = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}
 
 			real_t tex_anim_offset = 0.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
-				tex_anim_offset = curve_parameters[PARAM_ANGLE]->interpolate(tv);
+				tex_anim_offset = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}
 
 			p.seed = Math::rand();
@@ -825,51 +825,51 @@ void CPUParticles2D::_particles_process(double p_delta) {
 
 			real_t tex_linear_velocity = 1.0;
 			if (curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY].is_valid()) {
-				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->interpolate(tv);
+				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->sample(tv);
 			}
 
 			real_t tex_orbit_velocity = 1.0;
 			if (curve_parameters[PARAM_ORBIT_VELOCITY].is_valid()) {
-				tex_orbit_velocity = curve_parameters[PARAM_ORBIT_VELOCITY]->interpolate(tv);
+				tex_orbit_velocity = curve_parameters[PARAM_ORBIT_VELOCITY]->sample(tv);
 			}
 
 			real_t tex_angular_velocity = 1.0;
 			if (curve_parameters[PARAM_ANGULAR_VELOCITY].is_valid()) {
-				tex_angular_velocity = curve_parameters[PARAM_ANGULAR_VELOCITY]->interpolate(tv);
+				tex_angular_velocity = curve_parameters[PARAM_ANGULAR_VELOCITY]->sample(tv);
 			}
 
 			real_t tex_linear_accel = 1.0;
 			if (curve_parameters[PARAM_LINEAR_ACCEL].is_valid()) {
-				tex_linear_accel = curve_parameters[PARAM_LINEAR_ACCEL]->interpolate(tv);
+				tex_linear_accel = curve_parameters[PARAM_LINEAR_ACCEL]->sample(tv);
 			}
 
 			real_t tex_tangential_accel = 1.0;
 			if (curve_parameters[PARAM_TANGENTIAL_ACCEL].is_valid()) {
-				tex_tangential_accel = curve_parameters[PARAM_TANGENTIAL_ACCEL]->interpolate(tv);
+				tex_tangential_accel = curve_parameters[PARAM_TANGENTIAL_ACCEL]->sample(tv);
 			}
 
 			real_t tex_radial_accel = 1.0;
 			if (curve_parameters[PARAM_RADIAL_ACCEL].is_valid()) {
-				tex_radial_accel = curve_parameters[PARAM_RADIAL_ACCEL]->interpolate(tv);
+				tex_radial_accel = curve_parameters[PARAM_RADIAL_ACCEL]->sample(tv);
 			}
 
 			real_t tex_damping = 1.0;
 			if (curve_parameters[PARAM_DAMPING].is_valid()) {
-				tex_damping = curve_parameters[PARAM_DAMPING]->interpolate(tv);
+				tex_damping = curve_parameters[PARAM_DAMPING]->sample(tv);
 			}
 
 			real_t tex_angle = 1.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
-				tex_angle = curve_parameters[PARAM_ANGLE]->interpolate(tv);
+				tex_angle = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}
 			real_t tex_anim_speed = 1.0;
 			if (curve_parameters[PARAM_ANIM_SPEED].is_valid()) {
-				tex_anim_speed = curve_parameters[PARAM_ANIM_SPEED]->interpolate(tv);
+				tex_anim_speed = curve_parameters[PARAM_ANIM_SPEED]->sample(tv);
 			}
 
 			real_t tex_anim_offset = 1.0;
 			if (curve_parameters[PARAM_ANIM_OFFSET].is_valid()) {
-				tex_anim_offset = curve_parameters[PARAM_ANIM_OFFSET]->interpolate(tv);
+				tex_anim_offset = curve_parameters[PARAM_ANIM_OFFSET]->sample(tv);
 			}
 
 			Vector2 force = gravity;
@@ -921,18 +921,18 @@ void CPUParticles2D::_particles_process(double p_delta) {
 		Vector2 tex_scale = Vector2(1.0, 1.0);
 		if (split_scale) {
 			if (scale_curve_x.is_valid()) {
-				tex_scale.x = scale_curve_x->interpolate(tv);
+				tex_scale.x = scale_curve_x->sample(tv);
 			} else {
 				tex_scale.x = 1.0;
 			}
 			if (scale_curve_y.is_valid()) {
-				tex_scale.y = scale_curve_y->interpolate(tv);
+				tex_scale.y = scale_curve_y->sample(tv);
 			} else {
 				tex_scale.y = 1.0;
 			}
 		} else {
 			if (curve_parameters[PARAM_SCALE].is_valid()) {
-				real_t tmp_scale = curve_parameters[PARAM_SCALE]->interpolate(tv);
+				real_t tmp_scale = curve_parameters[PARAM_SCALE]->sample(tv);
 				tex_scale.x = tmp_scale;
 				tex_scale.y = tmp_scale;
 			}
@@ -940,7 +940,7 @@ void CPUParticles2D::_particles_process(double p_delta) {
 
 		real_t tex_hue_variation = 0.0;
 		if (curve_parameters[PARAM_HUE_VARIATION].is_valid()) {
-			tex_hue_variation = curve_parameters[PARAM_HUE_VARIATION]->interpolate(tv);
+			tex_hue_variation = curve_parameters[PARAM_HUE_VARIATION]->sample(tv);
 		}
 
 		real_t hue_rot_angle = (tex_hue_variation)*Math_TAU * Math::lerp(parameters_min[PARAM_HUE_VARIATION], parameters_max[PARAM_HUE_VARIATION], p.hue_rot_rand);
diff --git a/scene/2d/line_builder.cpp b/scene/2d/line_builder.cpp
index 25eb9b9851..2bbe88b0e0 100644
--- a/scene/2d/line_builder.cpp
+++ b/scene/2d/line_builder.cpp
@@ -137,14 +137,14 @@ void LineBuilder::build() {
 		// The line's outer length will be a little higher due to begin and end caps
 		if (begin_cap_mode == Line2D::LINE_CAP_BOX || begin_cap_mode == Line2D::LINE_CAP_ROUND) {
 			if (retrieve_curve) {
-				total_distance += width * curve->interpolate_baked(0.f) * 0.5f;
+				total_distance += width * curve->sample_baked(0.f) * 0.5f;
 			} else {
 				total_distance += width * 0.5f;
 			}
 		}
 		if (end_cap_mode == Line2D::LINE_CAP_BOX || end_cap_mode == Line2D::LINE_CAP_ROUND) {
 			if (retrieve_curve) {
-				total_distance += width * curve->interpolate_baked(1.f) * 0.5f;
+				total_distance += width * curve->sample_baked(1.f) * 0.5f;
 			} else {
 				total_distance += width * 0.5f;
 			}
@@ -160,7 +160,7 @@ void LineBuilder::build() {
 	float uvx1 = 0.f;
 
 	if (retrieve_curve) {
-		width_factor = curve->interpolate_baked(0.f);
+		width_factor = curve->sample_baked(0.f);
 	}
 
 	pos_up0 += u0 * hw * width_factor;
@@ -219,7 +219,7 @@ void LineBuilder::build() {
 			color1 = gradient->get_color_at_offset(current_distance1 / total_distance);
 		}
 		if (retrieve_curve) {
-			width_factor = curve->interpolate_baked(current_distance1 / total_distance);
+			width_factor = curve->sample_baked(current_distance1 / total_distance);
 		}
 
 		Vector2 inner_normal0, inner_normal1;
@@ -383,7 +383,7 @@ void LineBuilder::build() {
 		color1 = gradient->get_color(gradient->get_points_count() - 1);
 	}
 	if (retrieve_curve) {
-		width_factor = curve->interpolate_baked(1.f);
+		width_factor = curve->sample_baked(1.f);
 	}
 
 	Vector2 pos_up1 = pos1 + u0 * hw * width_factor;
diff --git a/scene/2d/path_2d.cpp b/scene/2d/path_2d.cpp
index b883d14a41..be17299f07 100644
--- a/scene/2d/path_2d.cpp
+++ b/scene/2d/path_2d.cpp
@@ -47,7 +47,7 @@ Rect2 Path2D::_edit_get_rect() const {
 	for (int i = 0; i < curve->get_point_count(); i++) {
 		for (int j = 0; j <= 8; j++) {
 			real_t frac = j / 8.0;
-			Vector2 p = curve->interpolate(i, frac);
+			Vector2 p = curve->sample(i, frac);
 			aabb.expand_to(p);
 		}
 	}
@@ -70,7 +70,7 @@ bool Path2D::_edit_is_selected_on_click(const Point2 &p_point, double p_toleranc
 
 		for (int j = 1; j <= 8; j++) {
 			real_t frac = j / 8.0;
-			s[1] = curve->interpolate(i, frac);
+			s[1] = curve->sample(i, frac);
 
 			Vector2 p = Geometry2D::get_closest_point_to_segment(p_point, s);
 			if (p.distance_to(p_point) <= p_tolerance) {
@@ -112,7 +112,7 @@ void Path2D::_notification(int p_what) {
 			for (int i = 0; i < curve->get_point_count(); i++) {
 				for (int j = 0; j < 8; j++) {
 					real_t frac = j * (1.0 / 8.0);
-					Vector2 p = curve->interpolate(i, frac);
+					Vector2 p = curve->sample(i, frac);
 					_cached_draw_pts.set(count++, p);
 				}
 			}
@@ -175,7 +175,7 @@ void PathFollow2D::_update_transform() {
 	if (path_length == 0) {
 		return;
 	}
-	Vector2 pos = c->interpolate_baked(progress, cubic);
+	Vector2 pos = c->sample_baked(progress, cubic);
 
 	if (rotates) {
 		real_t ahead = progress + lookahead;
@@ -195,14 +195,14 @@ void PathFollow2D::_update_transform() {
 			}
 		}
 
-		Vector2 ahead_pos = c->interpolate_baked(ahead, cubic);
+		Vector2 ahead_pos = c->sample_baked(ahead, cubic);
 
 		Vector2 tangent_to_curve;
 		if (ahead_pos == pos) {
 			// This will happen at the end of non-looping or non-closed paths.
 			// We'll try a look behind instead, in order to get a meaningful angle.
 			tangent_to_curve =
-					(pos - c->interpolate_baked(progress - lookahead, cubic)).normalized();
+					(pos - c->sample_baked(progress - lookahead, cubic)).normalized();
 		} else {
 			tangent_to_curve = (ahead_pos - pos).normalized();
 		}
diff --git a/scene/3d/cpu_particles_3d.cpp b/scene/3d/cpu_particles_3d.cpp
index 9dc61b35af..e14bb1aa94 100644
--- a/scene/3d/cpu_particles_3d.cpp
+++ b/scene/3d/cpu_particles_3d.cpp
@@ -739,17 +739,17 @@ void CPUParticles3D::_particles_process(double p_delta) {
 
 			/*real_t tex_linear_velocity = 0;
 			if (curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY].is_valid()) {
-				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->interpolate(0);
+				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->sample(0);
 			}*/
 
 			real_t tex_angle = 0.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
-				tex_angle = curve_parameters[PARAM_ANGLE]->interpolate(tv);
+				tex_angle = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}
 
 			real_t tex_anim_offset = 0.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
-				tex_anim_offset = curve_parameters[PARAM_ANGLE]->interpolate(tv);
+				tex_anim_offset = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}
 
 			p.seed = Math::rand();
@@ -907,53 +907,53 @@ void CPUParticles3D::_particles_process(double p_delta) {
 
 			real_t tex_linear_velocity = 1.0;
 			if (curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY].is_valid()) {
-				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->interpolate(tv);
+				tex_linear_velocity = curve_parameters[PARAM_INITIAL_LINEAR_VELOCITY]->sample(tv);
 			}
 
 			real_t tex_orbit_velocity = 1.0;
 			if (particle_flags[PARTICLE_FLAG_DISABLE_Z]) {
 				if (curve_parameters[PARAM_ORBIT_VELOCITY].is_valid()) {
-					tex_orbit_velocity = curve_parameters[PARAM_ORBIT_VELOCITY]->interpolate(tv);
+					tex_orbit_velocity = curve_parameters[PARAM_ORBIT_VELOCITY]->sample(tv);
 				}
 			}
 
 			real_t tex_angular_velocity = 1.0;
 			if (curve_parameters[PARAM_ANGULAR_VELOCITY].is_valid()) {
-				tex_angular_velocity = curve_parameters[PARAM_ANGULAR_VELOCITY]->interpolate(tv);
+				tex_angular_velocity = curve_parameters[PARAM_ANGULAR_VELOCITY]->sample(tv);
 			}
 
 			real_t tex_linear_accel = 1.0;
 			if (curve_parameters[PARAM_LINEAR_ACCEL].is_valid()) {
-				tex_linear_accel = curve_parameters[PARAM_LINEAR_ACCEL]->interpolate(tv);
+				tex_linear_accel = curve_parameters[PARAM_LINEAR_ACCEL]->sample(tv);
 			}
 
 			real_t tex_tangential_accel = 1.0;
 			if (curve_parameters[PARAM_TANGENTIAL_ACCEL].is_valid()) {
-				tex_tangential_accel = curve_parameters[PARAM_TANGENTIAL_ACCEL]->interpolate(tv);
+				tex_tangential_accel = curve_parameters[PARAM_TANGENTIAL_ACCEL]->sample(tv);
 			}
 
 			real_t tex_radial_accel = 1.0;
 			if (curve_parameters[PARAM_RADIAL_ACCEL].is_valid()) {
-				tex_radial_accel = curve_parameters[PARAM_RADIAL_ACCEL]->interpolate(tv);
+				tex_radial_accel = curve_parameters[PARAM_RADIAL_ACCEL]->sample(tv);
 			}
 
 			real_t tex_damping = 1.0;
 			if (curve_parameters[PARAM_DAMPING].is_valid()) {
-				tex_damping = curve_parameters[PARAM_DAMPING]->interpolate(tv);
+				tex_damping = curve_parameters[PARAM_DAMPING]->sample(tv);
 			}
 
 			real_t tex_angle = 1.0;
 			if (curve_parameters[PARAM_ANGLE].is_valid()) {
-				tex_angle = curve_parameters[PARAM_ANGLE]->interpolate(tv);
+				tex_angle = curve_parameters[PARAM_ANGLE]->sample(tv);
 			}
 			real_t tex_anim_speed = 1.0;
 			if (curve_parameters[PARAM_ANIM_SPEED].is_valid()) {
-				tex_anim_speed = curve_parameters[PARAM_ANIM_SPEED]->interpolate(tv);
+				tex_anim_speed = curve_parameters[PARAM_ANIM_SPEED]->sample(tv);
 			}
 
 			real_t tex_anim_offset = 1.0;
 			if (curve_parameters[PARAM_ANIM_OFFSET].is_valid()) {
-				tex_anim_offset = curve_parameters[PARAM_ANIM_OFFSET]->interpolate(tv);
+				tex_anim_offset = curve_parameters[PARAM_ANIM_OFFSET]->sample(tv);
 			}
 
 			Vector3 force = gravity;
@@ -1016,23 +1016,23 @@ void CPUParticles3D::_particles_process(double p_delta) {
 		Vector3 tex_scale = Vector3(1.0, 1.0, 1.0);
 		if (split_scale) {
 			if (scale_curve_x.is_valid()) {
-				tex_scale.x = scale_curve_x->interpolate(tv);
+				tex_scale.x = scale_curve_x->sample(tv);
 			} else {
 				tex_scale.x = 1.0;
 			}
 			if (scale_curve_y.is_valid()) {
-				tex_scale.y = scale_curve_y->interpolate(tv);
+				tex_scale.y = scale_curve_y->sample(tv);
 			} else {
 				tex_scale.y = 1.0;
 			}
 			if (scale_curve_z.is_valid()) {
-				tex_scale.z = scale_curve_z->interpolate(tv);
+				tex_scale.z = scale_curve_z->sample(tv);
 			} else {
 				tex_scale.z = 1.0;
 			}
 		} else {
 			if (curve_parameters[PARAM_SCALE].is_valid()) {
-				float tmp_scale = curve_parameters[PARAM_SCALE]->interpolate(tv);
+				float tmp_scale = curve_parameters[PARAM_SCALE]->sample(tv);
 				tex_scale.x = tmp_scale;
 				tex_scale.y = tmp_scale;
 				tex_scale.z = tmp_scale;
@@ -1041,7 +1041,7 @@ void CPUParticles3D::_particles_process(double p_delta) {
 
 		real_t tex_hue_variation = 0.0;
 		if (curve_parameters[PARAM_HUE_VARIATION].is_valid()) {
-			tex_hue_variation = curve_parameters[PARAM_HUE_VARIATION]->interpolate(tv);
+			tex_hue_variation = curve_parameters[PARAM_HUE_VARIATION]->sample(tv);
 		}
 
 		real_t hue_rot_angle = (tex_hue_variation)*Math_TAU * Math::lerp(parameters_min[PARAM_HUE_VARIATION], parameters_max[PARAM_HUE_VARIATION], p.hue_rot_rand);
diff --git a/scene/3d/path_3d.cpp b/scene/3d/path_3d.cpp
index 7d79d9b4fd..3d23206e6b 100644
--- a/scene/3d/path_3d.cpp
+++ b/scene/3d/path_3d.cpp
@@ -198,17 +198,17 @@ void PathFollow3D::_update_transform(bool p_update_xyz_rot) {
 		}
 	}
 
-	Vector3 pos = c->interpolate_baked(progress, cubic);
+	Vector3 pos = c->sample_baked(progress, cubic);
 	Transform3D t = get_transform();
 	// Vector3 pos_offset = Vector3(h_offset, v_offset, 0); not used in all cases
 	// will be replaced by "Vector3(h_offset, v_offset, 0)" where it was formerly used
 
 	if (rotation_mode == ROTATION_ORIENTED) {
-		Vector3 forward = c->interpolate_baked(o_next, cubic) - pos;
+		Vector3 forward = c->sample_baked(o_next, cubic) - pos;
 
 		// Try with the previous position
 		if (forward.length_squared() < CMP_EPSILON2) {
-			forward = pos - c->interpolate_baked(o_prev, cubic);
+			forward = pos - c->sample_baked(o_prev, cubic);
 		}
 
 		if (forward.length_squared() < CMP_EPSILON2) {
@@ -217,10 +217,10 @@ void PathFollow3D::_update_transform(bool p_update_xyz_rot) {
 			forward.normalize();
 		}
 
-		Vector3 up = c->interpolate_baked_up_vector(progress, true);
+		Vector3 up = c->sample_baked_up_vector(progress, true);
 
 		if (o_next < progress) {
-			Vector3 up1 = c->interpolate_baked_up_vector(o_next, true);
+			Vector3 up1 = c->sample_baked_up_vector(o_next, true);
 			Vector3 axis = up.cross(up1);
 
 			if (axis.length_squared() < CMP_EPSILON2) {
@@ -249,10 +249,10 @@ void PathFollow3D::_update_transform(bool p_update_xyz_rot) {
 		t.origin = pos;
 		if (p_update_xyz_rot && prev_offset != progress) { // Only update rotation if some parameter has changed - i.e. not on addition to scene tree.
 			real_t sample_distance = bi * 0.01;
-			Vector3 t_prev_pos_a = c->interpolate_baked(prev_offset - sample_distance, cubic);
-			Vector3 t_prev_pos_b = c->interpolate_baked(prev_offset + sample_distance, cubic);
-			Vector3 t_cur_pos_a = c->interpolate_baked(progress - sample_distance, cubic);
-			Vector3 t_cur_pos_b = c->interpolate_baked(progress + sample_distance, cubic);
+			Vector3 t_prev_pos_a = c->sample_baked(prev_offset - sample_distance, cubic);
+			Vector3 t_prev_pos_b = c->sample_baked(prev_offset + sample_distance, cubic);
+			Vector3 t_cur_pos_a = c->sample_baked(progress - sample_distance, cubic);
+			Vector3 t_cur_pos_b = c->sample_baked(progress + sample_distance, cubic);
 			Vector3 t_prev = (t_prev_pos_a - t_prev_pos_b).normalized();
 			Vector3 t_cur = (t_cur_pos_a - t_cur_pos_b).normalized();
 
@@ -277,7 +277,7 @@ void PathFollow3D::_update_transform(bool p_update_xyz_rot) {
 			}
 
 			// do the additional tilting
-			real_t tilt_angle = c->interpolate_baked_tilt(progress);
+			real_t tilt_angle = c->sample_baked_tilt(progress);
 			Vector3 tilt_axis = t_cur; // not sure what tilt is supposed to do, is this correct??
 
 			if (likely(!Math::is_zero_approx(Math::abs(tilt_angle)))) {
diff --git a/scene/animation/animation_blend_tree.cpp b/scene/animation/animation_blend_tree.cpp
index 61f068408c..308e14592c 100644
--- a/scene/animation/animation_blend_tree.cpp
+++ b/scene/animation/animation_blend_tree.cpp
@@ -750,7 +750,7 @@ double AnimationNodeTransition::process(double p_time, bool p_seek, bool p_seek_
 
 		float blend = xfade_time == 0 ? 0 : (prev_xfading / xfade_time);
 		if (xfade_curve.is_valid()) {
-			blend = xfade_curve->interpolate(blend);
+			blend = xfade_curve->sample(blend);
 		}
 
 		if (from_start && !p_seek && switched) { //just switched, seek to start of current
diff --git a/scene/animation/animation_node_state_machine.cpp b/scene/animation/animation_node_state_machine.cpp
index afb52de307..4982afb59f 100644
--- a/scene/animation/animation_node_state_machine.cpp
+++ b/scene/animation/animation_node_state_machine.cpp
@@ -433,7 +433,7 @@ double AnimationNodeStateMachinePlayback::process(AnimationNodeStateMachine *p_s
 	}
 
 	if (current_curve.is_valid()) {
-		fade_blend = current_curve->interpolate(fade_blend);
+		fade_blend = current_curve->sample(fade_blend);
 	}
 	float rem = p_state_machine->blend_node(current, p_state_machine->states[current].node, p_time, p_seek, p_seek_root, fade_blend, AnimationNode::FILTER_IGNORE, true);
 
diff --git a/scene/resources/curve.cpp b/scene/resources/curve.cpp
index ee53578517..0ea5264935 100644
--- a/scene/resources/curve.cpp
+++ b/scene/resources/curve.cpp
@@ -313,7 +313,7 @@ void Curve::set_max_value(real_t p_max) {
 	emit_signal(SNAME(SIGNAL_RANGE_CHANGED));
 }
 
-real_t Curve::interpolate(real_t p_offset) const {
+real_t Curve::sample(real_t p_offset) const {
 	if (_points.size() == 0) {
 		return 0;
 	}
@@ -333,10 +333,10 @@ real_t Curve::interpolate(real_t p_offset) const {
 		return _points[0].position.y;
 	}
 
-	return interpolate_local_nocheck(i, local);
+	return sample_local_nocheck(i, local);
 }
 
-real_t Curve::interpolate_local_nocheck(int p_index, real_t p_local_offset) const {
+real_t Curve::sample_local_nocheck(int p_index, real_t p_local_offset) const {
 	const Point a = _points[p_index];
 	const Point b = _points[p_index + 1];
 
@@ -440,7 +440,7 @@ void Curve::bake() {
 
 	for (int i = 1; i < _bake_resolution - 1; ++i) {
 		real_t x = i / static_cast<real_t>(_bake_resolution);
-		real_t y = interpolate(x);
+		real_t y = sample(x);
 		_baked_cache.write[i] = y;
 	}
 
@@ -459,7 +459,7 @@ void Curve::set_bake_resolution(int p_resolution) {
 	_baked_cache_dirty = true;
 }
 
-real_t Curve::interpolate_baked(real_t p_offset) const {
+real_t Curve::sample_baked(real_t p_offset) const {
 	if (_baked_cache_dirty) {
 		// Last-second bake if not done already
 		const_cast<Curve *>(this)->bake();
@@ -486,7 +486,7 @@ real_t Curve::interpolate_baked(real_t p_offset) const {
 		fi = 0;
 	}
 
-	// Interpolate
+	// Sample
 	if (i + 1 < _baked_cache.size()) {
 		real_t t = fi - i;
 		return Math::lerp(_baked_cache[i], _baked_cache[i + 1], t);
@@ -595,8 +595,8 @@ void Curve::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_point_position", "index"), &Curve::get_point_position);
 	ClassDB::bind_method(D_METHOD("set_point_value", "index", "y"), &Curve::set_point_value);
 	ClassDB::bind_method(D_METHOD("set_point_offset", "index", "offset"), &Curve::set_point_offset);
-	ClassDB::bind_method(D_METHOD("interpolate", "offset"), &Curve::interpolate);
-	ClassDB::bind_method(D_METHOD("interpolate_baked", "offset"), &Curve::interpolate_baked);
+	ClassDB::bind_method(D_METHOD("sample", "offset"), &Curve::sample);
+	ClassDB::bind_method(D_METHOD("sample_baked", "offset"), &Curve::sample_baked);
 	ClassDB::bind_method(D_METHOD("get_point_left_tangent", "index"), &Curve::get_point_left_tangent);
 	ClassDB::bind_method(D_METHOD("get_point_right_tangent", "index"), &Curve::get_point_right_tangent);
 	ClassDB::bind_method(D_METHOD("get_point_left_mode", "index"), &Curve::get_point_left_mode);
@@ -720,7 +720,7 @@ void Curve2D::clear_points() {
 	}
 }
 
-Vector2 Curve2D::interpolate(int p_index, const real_t p_offset) const {
+Vector2 Curve2D::sample(int p_index, const real_t p_offset) const {
 	int pc = points.size();
 	ERR_FAIL_COND_V(pc == 0, Vector2());
 
@@ -738,14 +738,14 @@ Vector2 Curve2D::interpolate(int p_index, const real_t p_offset) const {
 	return p0.bezier_interpolate(p1, p2, p3, p_offset);
 }
 
-Vector2 Curve2D::interpolatef(real_t p_findex) const {
+Vector2 Curve2D::samplef(real_t p_findex) const {
 	if (p_findex < 0) {
 		p_findex = 0;
 	} else if (p_findex >= points.size()) {
 		p_findex = points.size();
 	}
 
-	return interpolate((int)p_findex, Math::fmod(p_findex, (real_t)1.0));
+	return sample((int)p_findex, Math::fmod(p_findex, (real_t)1.0));
 }
 
 void Curve2D::mark_dirty() {
@@ -883,7 +883,7 @@ real_t Curve2D::get_baked_length() const {
 	return baked_max_ofs;
 }
 
-Vector2 Curve2D::interpolate_baked(real_t p_offset, bool p_cubic) const {
+Vector2 Curve2D::sample_baked(real_t p_offset, bool p_cubic) const {
 	if (baked_cache_dirty) {
 		_bake();
 	}
@@ -923,7 +923,7 @@ Vector2 Curve2D::interpolate_baked(real_t p_offset, bool p_cubic) const {
 	real_t offset_end = baked_dist_cache[idx + 1];
 
 	real_t idx_interval = offset_end - offset_begin;
-	ERR_FAIL_COND_V_MSG(p_offset < offset_begin || p_offset > offset_end, Vector2(), "failed to find baked segment");
+	ERR_FAIL_COND_V_MSG(p_offset < offset_begin || p_offset > offset_end, Vector2(), "Couldn't find baked segment.");
 
 	real_t frac = (p_offset - offset_begin) / idx_interval;
 
@@ -1176,14 +1176,14 @@ void Curve2D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_point_out", "idx"), &Curve2D::get_point_out);
 	ClassDB::bind_method(D_METHOD("remove_point", "idx"), &Curve2D::remove_point);
 	ClassDB::bind_method(D_METHOD("clear_points"), &Curve2D::clear_points);
-	ClassDB::bind_method(D_METHOD("interpolate", "idx", "t"), &Curve2D::interpolate);
-	ClassDB::bind_method(D_METHOD("interpolatef", "fofs"), &Curve2D::interpolatef);
+	ClassDB::bind_method(D_METHOD("sample", "idx", "t"), &Curve2D::sample);
+	ClassDB::bind_method(D_METHOD("samplef", "fofs"), &Curve2D::samplef);
 	//ClassDB::bind_method(D_METHOD("bake","subdivs"),&Curve2D::bake,DEFVAL(10));
 	ClassDB::bind_method(D_METHOD("set_bake_interval", "distance"), &Curve2D::set_bake_interval);
 	ClassDB::bind_method(D_METHOD("get_bake_interval"), &Curve2D::get_bake_interval);
 
 	ClassDB::bind_method(D_METHOD("get_baked_length"), &Curve2D::get_baked_length);
-	ClassDB::bind_method(D_METHOD("interpolate_baked", "offset", "cubic"), &Curve2D::interpolate_baked, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("sample_baked", "offset", "cubic"), &Curve2D::sample_baked, DEFVAL(false));
 	ClassDB::bind_method(D_METHOD("get_baked_points"), &Curve2D::get_baked_points);
 	ClassDB::bind_method(D_METHOD("get_closest_point", "to_point"), &Curve2D::get_closest_point);
 	ClassDB::bind_method(D_METHOD("get_closest_offset", "to_point"), &Curve2D::get_closest_offset);
@@ -1309,7 +1309,7 @@ void Curve3D::clear_points() {
 	}
 }
 
-Vector3 Curve3D::interpolate(int p_index, real_t p_offset) const {
+Vector3 Curve3D::sample(int p_index, real_t p_offset) const {
 	int pc = points.size();
 	ERR_FAIL_COND_V(pc == 0, Vector3());
 
@@ -1327,14 +1327,14 @@ Vector3 Curve3D::interpolate(int p_index, real_t p_offset) const {
 	return p0.bezier_interpolate(p1, p2, p3, p_offset);
 }
 
-Vector3 Curve3D::interpolatef(real_t p_findex) const {
+Vector3 Curve3D::samplef(real_t p_findex) const {
 	if (p_findex < 0) {
 		p_findex = 0;
 	} else if (p_findex >= points.size()) {
 		p_findex = points.size();
 	}
 
-	return interpolate((int)p_findex, Math::fmod(p_findex, (real_t)1.0));
+	return sample((int)p_findex, Math::fmod(p_findex, (real_t)1.0));
 }
 
 void Curve3D::mark_dirty() {
@@ -1536,7 +1536,7 @@ real_t Curve3D::get_baked_length() const {
 	return baked_max_ofs;
 }
 
-Vector3 Curve3D::interpolate_baked(real_t p_offset, bool p_cubic) const {
+Vector3 Curve3D::sample_baked(real_t p_offset, bool p_cubic) const {
 	if (baked_cache_dirty) {
 		_bake();
 	}
@@ -1576,7 +1576,7 @@ Vector3 Curve3D::interpolate_baked(real_t p_offset, bool p_cubic) const {
 	real_t offset_end = baked_dist_cache[idx + 1];
 
 	real_t idx_interval = offset_end - offset_begin;
-	ERR_FAIL_COND_V_MSG(p_offset < offset_begin || p_offset > offset_end, Vector3(), "failed to find baked segment");
+	ERR_FAIL_COND_V_MSG(p_offset < offset_begin || p_offset > offset_end, Vector3(), "Couldn't find baked segment.");
 
 	real_t frac = (p_offset - offset_begin) / idx_interval;
 
@@ -1589,7 +1589,7 @@ Vector3 Curve3D::interpolate_baked(real_t p_offset, bool p_cubic) const {
 	}
 }
 
-real_t Curve3D::interpolate_baked_tilt(real_t p_offset) const {
+real_t Curve3D::sample_baked_tilt(real_t p_offset) const {
 	if (baked_cache_dirty) {
 		_bake();
 	}
@@ -1629,14 +1629,14 @@ real_t Curve3D::interpolate_baked_tilt(real_t p_offset) const {
 	real_t offset_end = baked_dist_cache[idx + 1];
 
 	real_t idx_interval = offset_end - offset_begin;
-	ERR_FAIL_COND_V_MSG(p_offset < offset_begin || p_offset > offset_end, 0, "failed to find baked segment");
+	ERR_FAIL_COND_V_MSG(p_offset < offset_begin || p_offset > offset_end, 0, "Couldn't find baked segment.");
 
 	real_t frac = (p_offset - offset_begin) / idx_interval;
 
 	return Math::lerp(r[idx], r[idx + 1], (real_t)frac);
 }
 
-Vector3 Curve3D::interpolate_baked_up_vector(real_t p_offset, bool p_apply_tilt) const {
+Vector3 Curve3D::sample_baked_up_vector(real_t p_offset, bool p_apply_tilt) const {
 	if (baked_cache_dirty) {
 		_bake();
 	}
@@ -1671,7 +1671,7 @@ Vector3 Curve3D::interpolate_baked_up_vector(real_t p_offset, bool p_apply_tilt)
 	real_t offset_end = baked_dist_cache[idx + 1];
 
 	real_t idx_interval = offset_end - offset_begin;
-	ERR_FAIL_COND_V_MSG(p_offset < offset_begin || p_offset > offset_end, Vector3(0, 1, 0), "failed to find baked segment");
+	ERR_FAIL_COND_V_MSG(p_offset < offset_begin || p_offset > offset_end, Vector3(0, 1, 0), "Couldn't find baked segment.");
 
 	real_t frac = (p_offset - offset_begin) / idx_interval;
 
@@ -1983,8 +1983,8 @@ void Curve3D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_point_out", "idx"), &Curve3D::get_point_out);
 	ClassDB::bind_method(D_METHOD("remove_point", "idx"), &Curve3D::remove_point);
 	ClassDB::bind_method(D_METHOD("clear_points"), &Curve3D::clear_points);
-	ClassDB::bind_method(D_METHOD("interpolate", "idx", "t"), &Curve3D::interpolate);
-	ClassDB::bind_method(D_METHOD("interpolatef", "fofs"), &Curve3D::interpolatef);
+	ClassDB::bind_method(D_METHOD("sample", "idx", "t"), &Curve3D::sample);
+	ClassDB::bind_method(D_METHOD("samplef", "fofs"), &Curve3D::samplef);
 	//ClassDB::bind_method(D_METHOD("bake","subdivs"),&Curve3D::bake,DEFVAL(10));
 	ClassDB::bind_method(D_METHOD("set_bake_interval", "distance"), &Curve3D::set_bake_interval);
 	ClassDB::bind_method(D_METHOD("get_bake_interval"), &Curve3D::get_bake_interval);
@@ -1992,8 +1992,8 @@ void Curve3D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("is_up_vector_enabled"), &Curve3D::is_up_vector_enabled);
 
 	ClassDB::bind_method(D_METHOD("get_baked_length"), &Curve3D::get_baked_length);
-	ClassDB::bind_method(D_METHOD("interpolate_baked", "offset", "cubic"), &Curve3D::interpolate_baked, DEFVAL(false));
-	ClassDB::bind_method(D_METHOD("interpolate_baked_up_vector", "offset", "apply_tilt"), &Curve3D::interpolate_baked_up_vector, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("sample_baked", "offset", "cubic"), &Curve3D::sample_baked, DEFVAL(false));
+	ClassDB::bind_method(D_METHOD("sample_baked_up_vector", "offset", "apply_tilt"), &Curve3D::sample_baked_up_vector, DEFVAL(false));
 	ClassDB::bind_method(D_METHOD("get_baked_points"), &Curve3D::get_baked_points);
 	ClassDB::bind_method(D_METHOD("get_baked_tilts"), &Curve3D::get_baked_tilts);
 	ClassDB::bind_method(D_METHOD("get_baked_up_vectors"), &Curve3D::get_baked_up_vectors);
diff --git a/scene/resources/curve.h b/scene/resources/curve.h
index 08807b1b6e..88b6dda096 100644
--- a/scene/resources/curve.h
+++ b/scene/resources/curve.h
@@ -100,8 +100,8 @@ public:
 	real_t get_max_value() const { return _max_value; }
 	void set_max_value(real_t p_max);
 
-	real_t interpolate(real_t p_offset) const;
-	real_t interpolate_local_nocheck(int p_index, real_t p_local_offset) const;
+	real_t sample(real_t p_offset) const;
+	real_t sample_local_nocheck(int p_index, real_t p_local_offset) const;
 
 	void clean_dupes();
 
@@ -123,7 +123,7 @@ public:
 	void bake();
 	int get_bake_resolution() const { return _bake_resolution; }
 	void set_bake_resolution(int p_resolution);
-	real_t interpolate_baked(real_t p_offset) const;
+	real_t sample_baked(real_t p_offset) const;
 
 	void ensure_default_setup(real_t p_min, real_t p_max);
 
@@ -208,14 +208,14 @@ public:
 	void remove_point(int p_index);
 	void clear_points();
 
-	Vector2 interpolate(int p_index, real_t p_offset) const;
-	Vector2 interpolatef(real_t p_findex) const;
+	Vector2 sample(int p_index, real_t p_offset) const;
+	Vector2 samplef(real_t p_findex) const;
 
 	void set_bake_interval(real_t p_tolerance);
 	real_t get_bake_interval() const;
 
 	real_t get_baked_length() const;
-	Vector2 interpolate_baked(real_t p_offset, bool p_cubic = false) const;
+	Vector2 sample_baked(real_t p_offset, bool p_cubic = false) const;
 	PackedVector2Array get_baked_points() const; //useful for going through
 	Vector2 get_closest_point(const Vector2 &p_to_point) const;
 	real_t get_closest_offset(const Vector2 &p_to_point) const;
@@ -285,8 +285,8 @@ public:
 	void remove_point(int p_index);
 	void clear_points();
 
-	Vector3 interpolate(int p_index, real_t p_offset) const;
-	Vector3 interpolatef(real_t p_findex) const;
+	Vector3 sample(int p_index, real_t p_offset) const;
+	Vector3 samplef(real_t p_findex) const;
 
 	void set_bake_interval(real_t p_tolerance);
 	real_t get_bake_interval() const;
@@ -294,9 +294,9 @@ public:
 	bool is_up_vector_enabled() const;
 
 	real_t get_baked_length() const;
-	Vector3 interpolate_baked(real_t p_offset, bool p_cubic = false) const;
-	real_t interpolate_baked_tilt(real_t p_offset) const;
-	Vector3 interpolate_baked_up_vector(real_t p_offset, bool p_apply_tilt = false) const;
+	Vector3 sample_baked(real_t p_offset, bool p_cubic = false) const;
+	real_t sample_baked_tilt(real_t p_offset) const;
+	Vector3 sample_baked_up_vector(real_t p_offset, bool p_apply_tilt = false) const;
 	PackedVector3Array get_baked_points() const; //useful for going through
 	Vector<real_t> get_baked_tilts() const; //useful for going through
 	PackedVector3Array get_baked_up_vectors() const;
diff --git a/scene/resources/gradient.cpp b/scene/resources/gradient.cpp
index a9c44dc6bf..f04eb75d86 100644
--- a/scene/resources/gradient.cpp
+++ b/scene/resources/gradient.cpp
@@ -56,7 +56,7 @@ void Gradient::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_color", "point", "color"), &Gradient::set_color);
 	ClassDB::bind_method(D_METHOD("get_color", "point"), &Gradient::get_color);
 
-	ClassDB::bind_method(D_METHOD("interpolate", "offset"), &Gradient::get_color_at_offset);
+	ClassDB::bind_method(D_METHOD("sample", "offset"), &Gradient::get_color_at_offset);
 
 	ClassDB::bind_method(D_METHOD("get_point_count"), &Gradient::get_points_count);
 
diff --git a/scene/resources/gradient.h b/scene/resources/gradient.h
index e4bac15e4b..2b91331ab0 100644
--- a/scene/resources/gradient.h
+++ b/scene/resources/gradient.h
@@ -122,7 +122,7 @@ public:
 			}
 		}
 
-		// Return interpolated value.
+		// Return sampled value.
 		if (points[middle].offset > p_offset) {
 			middle--;
 		}
diff --git a/scene/resources/primitive_meshes.cpp b/scene/resources/primitive_meshes.cpp
index fc5cf2a028..727f7a4e09 100644
--- a/scene/resources/primitive_meshes.cpp
+++ b/scene/resources/primitive_meshes.cpp
@@ -1822,7 +1822,7 @@ void TubeTrailMesh::_create_mesh_array(Array &p_arr) const {
 
 			float r = radius;
 			if (curve.is_valid() && curve->get_point_count() > 0) {
-				r *= curve->interpolate_baked(v);
+				r *= curve->sample_baked(v);
 			}
 			float x = sin(u * Math_TAU);
 			float z = cos(u * Math_TAU);
@@ -1863,7 +1863,7 @@ void TubeTrailMesh::_create_mesh_array(Array &p_arr) const {
 	// add top
 	float scale_pos = 1.0;
 	if (curve.is_valid() && curve->get_point_count() > 0) {
-		scale_pos = curve->interpolate_baked(0);
+		scale_pos = curve->sample_baked(0);
 	}
 
 	if (scale_pos > CMP_EPSILON) {
@@ -1925,7 +1925,7 @@ void TubeTrailMesh::_create_mesh_array(Array &p_arr) const {
 
 	float scale_neg = 1.0;
 	if (curve.is_valid() && curve->get_point_count() > 0) {
-		scale_neg = curve->interpolate_baked(1.0);
+		scale_neg = curve->sample_baked(1.0);
 	}
 
 	// add bottom
@@ -2138,7 +2138,7 @@ void RibbonTrailMesh::_create_mesh_array(Array &p_arr) const {
 		float s = size;
 
 		if (curve.is_valid() && curve->get_point_count() > 0) {
-			s *= curve->interpolate_baked(v);
+			s *= curve->sample_baked(v);
 		}
 
 		points.push_back(Vector3(-s * 0.5, y, 0));
diff --git a/scene/resources/texture.cpp b/scene/resources/texture.cpp
index 25f5006c4f..f8f6900976 100644
--- a/scene/resources/texture.cpp
+++ b/scene/resources/texture.cpp
@@ -1866,11 +1866,11 @@ void CurveTexture::_update() {
 			for (int i = 0; i < _width; ++i) {
 				float t = i / static_cast<float>(_width);
 				if (texture_mode == TEXTURE_MODE_RGB) {
-					wd[i * 3 + 0] = curve.interpolate_baked(t);
+					wd[i * 3 + 0] = curve.sample_baked(t);
 					wd[i * 3 + 1] = wd[i * 3 + 0];
 					wd[i * 3 + 2] = wd[i * 3 + 0];
 				} else {
-					wd[i] = curve.interpolate_baked(t);
+					wd[i] = curve.sample_baked(t);
 				}
 			}
 
@@ -2054,7 +2054,7 @@ void CurveXYZTexture::_update() {
 			Curve &curve_x = **_curve_x;
 			for (int i = 0; i < _width; ++i) {
 				float t = i / static_cast<float>(_width);
-				wd[i * 3 + 0] = curve_x.interpolate_baked(t);
+				wd[i * 3 + 0] = curve_x.sample_baked(t);
 			}
 
 		} else {
@@ -2067,7 +2067,7 @@ void CurveXYZTexture::_update() {
 			Curve &curve_y = **_curve_y;
 			for (int i = 0; i < _width; ++i) {
 				float t = i / static_cast<float>(_width);
-				wd[i * 3 + 1] = curve_y.interpolate_baked(t);
+				wd[i * 3 + 1] = curve_y.sample_baked(t);
 			}
 
 		} else {
@@ -2080,7 +2080,7 @@ void CurveXYZTexture::_update() {
 			Curve &curve_z = **_curve_z;
 			for (int i = 0; i < _width; ++i) {
 				float t = i / static_cast<float>(_width);
-				wd[i * 3 + 2] = curve_z.interpolate_baked(t);
+				wd[i * 3 + 2] = curve_z.sample_baked(t);
 			}
 
 		} else {