SoftBodyShape.h

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// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
// SPDX-FileCopyrightText: 2023 Jorrit Rouwe
// SPDX-License-Identifier: MIT
 
#pragma once
 
#include <Jolt/Physics/Collision/Shape/Shape.h>
 
JPH_NAMESPACE_BEGIN
 
class SoftBodyMotionProperties;
class CollideShapeSettings;
 
class JPH_EXPORT SoftBodyShape final : public Shape
{
public:
    JPH_OVERRIDE_NEW_DELETE
 
                                    SoftBodyShape()                                         : Shape(EShapeType::SoftBody, EShapeSubType::SoftBody) { }
 
    uint                            GetSubShapeIDBits() const;
 
    uint32                          GetFaceIndex(const SubShapeID &inSubShapeID) const;
 
    // See Shape
    virtual bool                    MustBeStatic() const override                           { return false; }
    virtual Vec3                    GetCenterOfMass() const override                        { return Vec3::sZero(); }
    virtual AABox                   GetLocalBounds() const override;
    virtual uint                    GetSubShapeIDBitsRecursive() const override             { return GetSubShapeIDBits(); }
    virtual float                   GetInnerRadius() const override                         { return 0.0f; }
    virtual MassProperties          GetMassProperties() const override                      { return MassProperties(); }
    virtual const PhysicsMaterial * GetMaterial(const SubShapeID &inSubShapeID) const override;
    virtual Vec3                    GetSurfaceNormal(const SubShapeID &inSubShapeID, Vec3Arg inLocalSurfacePosition) const override;
    virtual void                    GetSupportingFace(const SubShapeID &inSubShapeID, Vec3Arg inDirection, Vec3Arg inScale, Mat44Arg inCenterOfMassTransform, SupportingFace &outVertices) const override;
    virtual void                    GetSubmergedVolume(Mat44Arg inCenterOfMassTransform, Vec3Arg inScale, const Plane &inSurface, float &outTotalVolume, float &outSubmergedVolume, Vec3 &outCenterOfBuoyancy
#ifdef JPH_DEBUG_RENDERER // Not using JPH_IF_DEBUG_RENDERER for Doxygen
        , RVec3Arg inBaseOffset
#endif
        ) const override;
#ifdef JPH_DEBUG_RENDERER
    virtual void                    Draw(DebugRenderer *inRenderer, RMat44Arg inCenterOfMassTransform, Vec3Arg inScale, ColorArg inColor, bool inUseMaterialColors, bool inDrawWireframe) const override;
#endif // JPH_DEBUG_RENDERER
    virtual bool                    CastRay(const RayCast &inRay, const SubShapeIDCreator &inSubShapeIDCreator, RayCastResult &ioHit) const override;
    virtual void                    CastRay(const RayCast &inRay, const RayCastSettings &inRayCastSettings, const SubShapeIDCreator &inSubShapeIDCreator, CastRayCollector &ioCollector, const ShapeFilter &inShapeFilter = { }) const override;
    virtual void                    CollidePoint(Vec3Arg inPoint, const SubShapeIDCreator &inSubShapeIDCreator, CollidePointCollector &ioCollector, const ShapeFilter &inShapeFilter = { }) const override;
    virtual void                    CollideSoftBodyVertices(Mat44Arg inCenterOfMassTransform, Vec3Arg inScale, SoftBodyVertex *ioVertices, uint inNumVertices, float inDeltaTime, Vec3Arg inDisplacementDueToGravity, int inCollidingShapeIndex) const override;
    virtual void                    GetTrianglesStart(GetTrianglesContext &ioContext, const AABox &inBox, Vec3Arg inPositionCOM, QuatArg inRotation, Vec3Arg inScale) const override;
    virtual int                     GetTrianglesNext(GetTrianglesContext &ioContext, int inMaxTrianglesRequested, Float3 *outTriangleVertices, const PhysicsMaterial **outMaterials = nullptr) const override;
    virtual Stats                   GetStats() const override;
    virtual float                   GetVolume() const override;
 
    // Register shape functions with the registry
    static void                     sRegister();
 
private:
    // Helper functions called by CollisionDispatch
    static void                     sCollideConvexVsSoftBody(const Shape *inShape1, const Shape *inShape2, Vec3Arg inScale1, Vec3Arg inScale2, Mat44Arg inCenterOfMassTransform1, Mat44Arg inCenterOfMassTransform2, const SubShapeIDCreator &inSubShapeIDCreator1, const SubShapeIDCreator &inSubShapeIDCreator2, const CollideShapeSettings &inCollideShapeSettings, CollideShapeCollector &ioCollector, const ShapeFilter &inShapeFilter);
    static void                     sCollideSphereVsSoftBody(const Shape *inShape1, const Shape *inShape2, Vec3Arg inScale1, Vec3Arg inScale2, Mat44Arg inCenterOfMassTransform1, Mat44Arg inCenterOfMassTransform2, const SubShapeIDCreator &inSubShapeIDCreator1, const SubShapeIDCreator &inSubShapeIDCreator2, const CollideShapeSettings &inCollideShapeSettings, CollideShapeCollector &ioCollector, const ShapeFilter &inShapeFilter);
    static void                     sCastConvexVsSoftBody(const ShapeCast &inShapeCast, const ShapeCastSettings &inShapeCastSettings, const Shape *inShape, Vec3Arg inScale, const ShapeFilter &inShapeFilter, Mat44Arg inCenterOfMassTransform2, const SubShapeIDCreator &inSubShapeIDCreator1, const SubShapeIDCreator &inSubShapeIDCreator2, CastShapeCollector &ioCollector);
    static void                     sCastSphereVsSoftBody(const ShapeCast &inShapeCast, const ShapeCastSettings &inShapeCastSettings, const Shape *inShape, Vec3Arg inScale, const ShapeFilter &inShapeFilter, Mat44Arg inCenterOfMassTransform2, const SubShapeIDCreator &inSubShapeIDCreator1, const SubShapeIDCreator &inSubShapeIDCreator2, CastShapeCollector &ioCollector);
 
    struct SBSGetTrianglesContext;
 
    friend class BodyManager;
 
    const SoftBodyMotionProperties *mSoftBodyMotionProperties;
};
 
JPH_NAMESPACE_END