initial commit, 4.5 stable

modules/jolt_physics/shapes/jolt_custom_motion_shape.cpp

@@ -0,0 +1,78 @@
+/**************************************************************************/
+/*  jolt_custom_motion_shape.cpp                                          */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include "jolt_custom_motion_shape.h"
+
+namespace {
+
+class JoltMotionConvexSupport final : public JPH::ConvexShape::Support {
+public:
+	JoltMotionConvexSupport(JPH::Vec3Arg p_motion, const JPH::ConvexShape::Support *p_inner_support) :
+			motion(p_motion),
+			inner_support(p_inner_support) {}
+
+	virtual JPH::Vec3 GetSupport(JPH::Vec3Arg p_direction) const override {
+		JPH::Vec3 support = inner_support->GetSupport(p_direction);
+
+		if (p_direction.Dot(motion) > 0) {
+			support += motion;
+		}
+
+		return support;
+	}
+
+	virtual float GetConvexRadius() const override { return inner_support->GetConvexRadius(); }
+
+private:
+	JPH::Vec3 motion = JPH::Vec3::sZero();
+
+	const JPH::ConvexShape::Support *inner_support = nullptr;
+};
+
+} // namespace
+
+JPH::AABox JoltCustomMotionShape::GetLocalBounds() const {
+	JPH::AABox aabb = inner_shape.GetLocalBounds();
+	JPH::AABox aabb_translated = aabb;
+	aabb_translated.Translate(motion);
+	aabb.Encapsulate(aabb_translated);
+
+	return aabb;
+}
+
+void JoltCustomMotionShape::GetSupportingFace(const JPH::SubShapeID &p_sub_shape_id, JPH::Vec3Arg p_direction, JPH::Vec3Arg p_scale, JPH::Mat44Arg p_center_of_mass_transform, JPH::Shape::SupportingFace &p_vertices) const {
+	// This is technically called when using the enhanced internal edge removal, but `JPH::InternalEdgeRemovingCollector` will
+	// only ever use the faces of the second shape in the collision pair, and this shape will always be the first in the pair, so
+	// we can safely skip this.
+}
+
+const JPH::ConvexShape::Support *JoltCustomMotionShape::GetSupportFunction(JPH::ConvexShape::ESupportMode p_mode, JPH::ConvexShape::SupportBuffer &p_buffer, JPH::Vec3Arg p_scale) const {
+	return new (&p_buffer) JoltMotionConvexSupport(motion, inner_shape.GetSupportFunction(p_mode, inner_support_buffer, p_scale));
+}