Base class for a compound shape. More...

#include <CompoundShape.h>

Inheritance diagram for CompoundShape:

Classes
struct	CastRayVisitor

struct	CastRayVisitorCollector

struct	CastShapeVisitor

struct	CollectTransformedShapesVisitor

struct	CollideCompoundVsShapeVisitor

struct	CollidePointVisitor

struct	CollideShapeVsCompoundVisitor

struct	GetIntersectingSubShapesVisitor

struct	SubShape

Public Types
using	SubShapes = Array< SubShape >

Public Types inherited from Shape
using	ShapeResult = ShapeSettings::ShapeResult

using	SupportingFace = StaticArray< Vec3, 32 >
	Type definition for a supporting face. More...

using	VisitedShapes = UnorderedSet< const Shape * >

using	ShapeToIDMap = StreamUtils::ObjectToIDMap< Shape >

using	IDToShapeMap = StreamUtils::IDToObjectMap< Shape >

using	MaterialToIDMap = StreamUtils::ObjectToIDMap< PhysicsMaterial >

using	IDToMaterialMap = StreamUtils::IDToObjectMap< PhysicsMaterial >

Public Member Functions
JPH_OVERRIDE_NEW_DELETE	CompoundShape (EShapeSubType inSubType)
	Constructor. More...

	CompoundShape (EShapeSubType inSubType, const ShapeSettings &inSettings, ShapeResult &outResult)

virtual Vec3	GetCenterOfMass () const override
	All shapes are centered around their center of mass. This function returns the center of mass position that needs to be applied to transform the shape to where it was created. More...

virtual bool	MustBeStatic () const override
	Check if this shape can only be used to create a static body or if it can also be dynamic/kinematic. More...

virtual AABox	GetLocalBounds () const override
	Get local bounding box including convex radius, this box is centered around the center of mass rather than the world transform. More...

virtual uint	GetSubShapeIDBitsRecursive () const override
	Get the max number of sub shape ID bits that are needed to be able to address any leaf shape in this shape. Used mainly for checking that it is smaller or equal than SubShapeID::MaxBits. More...

virtual AABox	GetWorldSpaceBounds (Mat44Arg inCenterOfMassTransform, Vec3Arg inScale) const override

virtual float	GetInnerRadius () const override

virtual MassProperties	GetMassProperties () const override
	Calculate the mass and inertia of this shape. More...

virtual const PhysicsMaterial *	GetMaterial (const SubShapeID &inSubShapeID) const override
	Get the material assigned to a particular sub shape ID. More...

virtual uint64	GetSubShapeUserData (const SubShapeID &inSubShapeID) const override
	Get the user data of a particular sub shape ID. More...

virtual TransformedShape	GetSubShapeTransformedShape (const SubShapeID &inSubShapeID, Vec3Arg inPositionCOM, QuatArg inRotation, Vec3Arg inScale, SubShapeID &outRemainder) 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 JPH_IF_DEBUG_RENDERER(, RVec3Arg inBaseOffset)) const override

virtual void	Draw (DebugRenderer *inRenderer, RMat44Arg inCenterOfMassTransform, Vec3Arg inScale, ColorArg inColor, bool inUseMaterialColors, bool inDrawWireframe) const override
	Draw the shape at a particular location with a particular color (debugging purposes) More...

virtual void	DrawGetSupportFunction (DebugRenderer *inRenderer, RMat44Arg inCenterOfMassTransform, Vec3Arg inScale, ColorArg inColor, bool inDrawSupportDirection) const override
	Draw the results of the GetSupportFunction with the convex radius added back on to show any errors introduced by this process (only relevant for convex shapes) More...

virtual void	DrawGetSupportingFace (DebugRenderer *inRenderer, RMat44Arg inCenterOfMassTransform, Vec3Arg inScale) const override
	Draw the results of the GetSupportingFace function to show any errors introduced by this process (only relevant for convex shapes) More...

virtual void	CollideSoftBodyVertices (Mat44Arg inCenterOfMassTransform, Vec3Arg inScale, SoftBodyVertex *ioVertices, uint inNumVertices, float inDeltaTime, Vec3Arg inDisplacementDueToGravity, int inCollidingShapeIndex) const override

virtual void	TransformShape (Mat44Arg inCenterOfMassTransform, TransformedShapeCollector &ioCollector) 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 int	GetIntersectingSubShapes (const AABox &inBox, uint *outSubShapeIndices, int inMaxSubShapeIndices) const =0

virtual int	GetIntersectingSubShapes (const OrientedBox &inBox, uint *outSubShapeIndices, int inMaxSubShapeIndices) const =0

const SubShapes &	GetSubShapes () const
	Access to the sub shapes of this compound. More...

uint	GetNumSubShapes () const
	Get the total number of sub shapes. More...

const SubShape &	GetSubShape (uint inIdx) const
	Access to a particular sub shape. More...

uint32	GetCompoundUserData (uint inIdx) const
	Get the user data associated with a shape in this compound. More...

void	SetCompoundUserData (uint inIdx, uint32 inUserData)
	Set the user data associated with a shape in this compound. More...

bool	IsSubShapeIDValid (SubShapeID inSubShapeID) const

uint32	GetSubShapeIndexFromID (SubShapeID inSubShapeID, SubShapeID &outRemainder) const

SubShapeIDCreator	GetSubShapeIDFromIndex (int inIdx, const SubShapeIDCreator &inParentSubShapeID) const
	Convert a sub shape index to a sub shape ID. More...

virtual void	SaveBinaryState (StreamOut &inStream) const override
	Saves the contents of the shape in binary form to inStream. More...

virtual void	SaveSubShapeState (ShapeList &outSubShapes) const override
	Outputs the shape references that this shape has to outSubShapes. More...

virtual void	RestoreSubShapeState (const ShapeRefC *inSubShapes, uint inNumShapes) override
	Restore the shape references after calling sRestoreFromBinaryState. Note that the exact same shapes need to be provided in the same order as returned by SaveSubShapeState. More...

virtual Stats	GetStatsRecursive (VisitedShapes &ioVisitedShapes) const override
	Volume of this shape (m^3). Note that for compound shapes the volume may be incorrect since child shapes can overlap which is not accounted for. More...

virtual float	GetVolume () const override

virtual bool	IsValidScale (Vec3Arg inScale) const override

virtual AABox	GetWorldSpaceBounds (Mat44Arg inCenterOfMassTransform, Vec3Arg inScale) const

AABox	GetWorldSpaceBounds (DMat44Arg inCenterOfMassTransform, Vec3Arg inScale) const
	Get world space bounds including convex radius. More...

Public Member Functions inherited from Shape
	Shape (EShapeType inType, EShapeSubType inSubType)
	Constructor. More...

	Shape (EShapeType inType, EShapeSubType inSubType, const ShapeSettings &inSettings, ShapeResult &outResult)

virtual	~Shape ()=default
	Destructor. More...

EShapeType	GetType () const
	Get type. More...

EShapeSubType	GetSubType () const

uint64	GetUserData () const
	User data (to be used freely by the application) More...

void	SetUserData (uint64 inUserData)

virtual bool	MustBeStatic () const
	Check if this shape can only be used to create a static body or if it can also be dynamic/kinematic. More...

virtual Vec3	GetCenterOfMass () const
	All shapes are centered around their center of mass. This function returns the center of mass position that needs to be applied to transform the shape to where it was created. More...

virtual AABox	GetLocalBounds () const =0
	Get local bounding box including convex radius, this box is centered around the center of mass rather than the world transform. More...

virtual uint	GetSubShapeIDBitsRecursive () const =0
	Get the max number of sub shape ID bits that are needed to be able to address any leaf shape in this shape. Used mainly for checking that it is smaller or equal than SubShapeID::MaxBits. More...

virtual AABox	GetWorldSpaceBounds (Mat44Arg inCenterOfMassTransform, Vec3Arg inScale) const

AABox	GetWorldSpaceBounds (DMat44Arg inCenterOfMassTransform, Vec3Arg inScale) const
	Get world space bounds including convex radius. More...

virtual float	GetInnerRadius () const =0

virtual MassProperties	GetMassProperties () const =0
	Calculate the mass and inertia of this shape. More...

virtual const PhysicsMaterial *	GetMaterial (const SubShapeID &inSubShapeID) const =0
	Get the material assigned to a particular sub shape ID. More...

virtual Vec3	GetSurfaceNormal (const SubShapeID &inSubShapeID, Vec3Arg inLocalSurfacePosition) const =0

virtual void	GetSupportingFace (const SubShapeID &inSubShapeID, Vec3Arg inDirection, Vec3Arg inScale, Mat44Arg inCenterOfMassTransform, SupportingFace &outVertices) const

virtual uint64	GetSubShapeUserData (const SubShapeID &inSubShapeID) const
	Get the user data of a particular sub shape ID. More...

virtual TransformedShape	GetSubShapeTransformedShape (const SubShapeID &inSubShapeID, Vec3Arg inPositionCOM, QuatArg inRotation, Vec3Arg inScale, SubShapeID &outRemainder) const

virtual void	GetSubmergedVolume (Mat44Arg inCenterOfMassTransform, Vec3Arg inScale, const Plane &inSurface, float &outTotalVolume, float &outSubmergedVolume, Vec3 &outCenterOfBuoyancy, RVec3Arg inBaseOffset) const =0

virtual void	Draw (DebugRenderer *inRenderer, RMat44Arg inCenterOfMassTransform, Vec3Arg inScale, ColorArg inColor, bool inUseMaterialColors, bool inDrawWireframe) const =0
	Draw the shape at a particular location with a particular color (debugging purposes) More...

virtual void	DrawGetSupportFunction (DebugRenderer *inRenderer, RMat44Arg inCenterOfMassTransform, Vec3Arg inScale, ColorArg inColor, bool inDrawSupportDirection) const
	Draw the results of the GetSupportFunction with the convex radius added back on to show any errors introduced by this process (only relevant for convex shapes) More...

virtual void	DrawGetSupportingFace (DebugRenderer *inRenderer, RMat44Arg inCenterOfMassTransform, Vec3Arg inScale) const
	Draw the results of the GetSupportingFace function to show any errors introduced by this process (only relevant for convex shapes) More...

virtual bool	CastRay (const RayCast &inRay, const SubShapeIDCreator &inSubShapeIDCreator, RayCastResult &ioHit) const =0

virtual void	CastRay (const RayCast &inRay, const RayCastSettings &inRayCastSettings, const SubShapeIDCreator &inSubShapeIDCreator, CastRayCollector &ioCollector, const ShapeFilter &inShapeFilter={ }) const =0

virtual void	CollidePoint (Vec3Arg inPoint, const SubShapeIDCreator &inSubShapeIDCreator, CollidePointCollector &ioCollector, const ShapeFilter &inShapeFilter={ }) const =0

virtual void	CollideSoftBodyVertices (Mat44Arg inCenterOfMassTransform, Vec3Arg inScale, SoftBodyVertex *ioVertices, uint inNumVertices, float inDeltaTime, Vec3Arg inDisplacementDueToGravity, int inCollidingShapeIndex) const =0

virtual void	CollectTransformedShapes (const AABox &inBox, Vec3Arg inPositionCOM, QuatArg inRotation, Vec3Arg inScale, const SubShapeIDCreator &inSubShapeIDCreator, TransformedShapeCollector &ioCollector, const ShapeFilter &inShapeFilter) const

virtual void	TransformShape (Mat44Arg inCenterOfMassTransform, TransformedShapeCollector &ioCollector) const

ShapeResult	ScaleShape (Vec3Arg inScale) const

virtual void	GetTrianglesStart (GetTrianglesContext &ioContext, const AABox &inBox, Vec3Arg inPositionCOM, QuatArg inRotation, Vec3Arg inScale) const =0

virtual int	GetTrianglesNext (GetTrianglesContext &ioContext, int inMaxTrianglesRequested, Float3 outTriangleVertices, const PhysicsMaterial *outMaterials=nullptr) const =0

virtual Stats	GetStats () const =0
	Get stats of this shape. Use for logging / data collection purposes only. Does not add values from child shapes, use GetStatsRecursive for this. More...

virtual Stats	GetStatsRecursive (VisitedShapes &ioVisitedShapes) const
	Volume of this shape (m^3). Note that for compound shapes the volume may be incorrect since child shapes can overlap which is not accounted for. More...

virtual float	GetVolume () const =0

virtual bool	IsValidScale (Vec3Arg inScale) const

virtual void	SaveMaterialState (PhysicsMaterialList &outMaterials) const
	Outputs the material references that this shape has to outMaterials. More...

virtual void	RestoreMaterialState (const PhysicsMaterialRefC *inMaterials, uint inNumMaterials)
	Restore the material references after calling sRestoreFromBinaryState. Note that the exact same materials need to be provided in the same order as returned by SaveMaterialState. More...

void	SaveWithChildren (StreamOut &inStream, ShapeToIDMap &ioShapeMap, MaterialToIDMap &ioMaterialMap) const
	Save this shape, all its children and its materials. Pass in an empty map in ioShapeMap / ioMaterialMap or reuse the same map while saving multiple shapes to the same stream in order to avoid writing duplicates. More...

Public Member Functions inherited from RefTarget< Shape >
	RefTarget ()=default
	Constructor. More...

	RefTarget (const RefTarget &)

	~RefTarget ()
	assert no one is referencing us More...

void	SetEmbedded () const

RefTarget &	operator= (const RefTarget &)
	Assignment operator. More...

uint32	GetRefCount () const
	Get current refcount of this object. More...

void	AddRef () const
	Add or release a reference to this object. More...

void	Release () const

Public Member Functions inherited from NonCopyable
	NonCopyable ()=default

	NonCopyable (const NonCopyable &)=delete

void	operator= (const NonCopyable &)=delete

Static Public Member Functions
static void	sRegister ()

Static Public Member Functions inherited from Shape
static ShapeResult	sRestoreFromBinaryState (StreamIn &inStream)
	Creates a Shape of the correct type and restores its contents from the binary stream inStream. More...

static ShapeResult	sRestoreWithChildren (StreamIn &inStream, IDToShapeMap &ioShapeMap, IDToMaterialMap &ioMaterialMap)
	Restore a shape, all its children and materials. Pass in an empty map in ioShapeMap / ioMaterialMap or reuse the same map while reading multiple shapes from the same stream in order to restore duplicates. More...

Static Public Member Functions inherited from RefTarget< Shape >
static int	sInternalGetRefCountOffset ()
	INTERNAL HELPER FUNCTION USED BY SERIALIZATION. More...

Protected Member Functions
virtual void	RestoreBinaryState (StreamIn &inStream) override
	This function should not be called directly, it is used by sRestoreFromBinaryState. More...

uint	GetSubShapeIDBits () const
	Determine amount of bits needed to encode sub shape id. More...

void	CalculateInnerRadius ()
	Determine the inner radius of this shape. More...

virtual void	RestoreBinaryState (StreamIn &inStream)
	This function should not be called directly, it is used by sRestoreFromBinaryState. More...

Protected Attributes
Vec3	mCenterOfMass { Vec3::sZero() }
	Center of mass of the compound. More...

AABox	mLocalBounds

SubShapes	mSubShapes

float	mInnerRadius = FLT_MAX
	Smallest radius of GetInnerRadius() of child shapes. More...

Protected Attributes inherited from RefTarget< Shape >
atomic< uint32 >	mRefCount
	Current reference count. More...

Additional Inherited Members
Static Public Attributes inherited from Shape
static constexpr int	cGetTrianglesMinTrianglesRequested = 32
	This is the minimum amount of triangles that should be requested through GetTrianglesNext. More...

static bool	sDrawSubmergedVolumes = false
	Debug helper which draws the intersection between water and the shapes, the center of buoyancy and the submerged volume. More...

Static Protected Member Functions inherited from Shape
static void	sCollidePointUsingRayCast (const Shape &inShape, Vec3Arg inPoint, const SubShapeIDCreator &inSubShapeIDCreator, CollidePointCollector &ioCollector, const ShapeFilter &inShapeFilter)
	A fallback version of CollidePoint that uses a ray cast and counts the number of hits to determine if the point is inside the shape. Odd number of hits means inside, even number of hits means outside. More...

Static Protected Attributes inherited from RefTarget< Shape >
static constexpr uint32	cEmbedded
	A large value that gets added to the refcount to mark the object as embedded. More...

Detailed Description

Base class for a compound shape.

Member Typedef Documentation

◆ SubShapes

using CompoundShape::SubShapes = Array<SubShape>

Constructor & Destructor Documentation

◆ CompoundShape() [1/2]

JPH_OVERRIDE_NEW_DELETE CompoundShape::CompoundShape ( EShapeSubType inSubType )

inlineexplicit

Constructor.

◆ CompoundShape() [2/2]

CompoundShape::CompoundShape	(	EShapeSubType	inSubType,
		const ShapeSettings &	inSettings,
		ShapeResult &	outResult
	)

inline

Member Function Documentation

◆ CalculateInnerRadius()

void CompoundShape::CalculateInnerRadius ( )

inlineprotected

Determine the inner radius of this shape.

◆ CollideSoftBodyVertices()

void CompoundShape::CollideSoftBodyVertices	(	Mat44Arg	inCenterOfMassTransform,
		Vec3Arg	inScale,
		SoftBodyVertex *	ioVertices,
		uint	inNumVertices,
		float	inDeltaTime,
		Vec3Arg	inDisplacementDueToGravity,
		int	inCollidingShapeIndex
	)		const

overridevirtual

Collides all vertices of a soft body with this shape and updates SoftBodyVertex::mCollisionPlane, SoftBodyVertex::mCollidingShapeIndex and SoftBodyVertex::mLargestPenetration if a collision with more penetration was found.

Parameters

inCenterOfMassTransform	Center of mass transform for this shape relative to the vertices.
inScale	The scale to use for this shape
ioVertices	The vertices of the soft body
inNumVertices	The number of vertices in ioVertices
inDeltaTime	Delta time of this time step (can be used to extrapolate the position using the velocity of the particle)
inDisplacementDueToGravity	Displacement due to gravity during this time step
inCollidingShapeIndex	Value to store in SoftBodyVertex::mCollidingShapeIndex when a collision was found

Implements Shape.

◆ Draw()

void CompoundShape::Draw	(	DebugRenderer *	inRenderer,
		RMat44Arg	inCenterOfMassTransform,
		Vec3Arg	inScale,
		ColorArg	inColor,
		bool	inUseMaterialColors,
		bool	inDrawWireframe
	)		const

overridevirtual

Draw the shape at a particular location with a particular color (debugging purposes)

Implements Shape.

◆ DrawGetSupportFunction()

void CompoundShape::DrawGetSupportFunction	(	DebugRenderer *	inRenderer,
		RMat44Arg	inCenterOfMassTransform,
		Vec3Arg	inScale,
		ColorArg	inColor,
		bool	inDrawSupportDirection
	)		const

overridevirtual

Draw the results of the GetSupportFunction with the convex radius added back on to show any errors introduced by this process (only relevant for convex shapes)

Reimplemented from Shape.

◆ DrawGetSupportingFace()

void CompoundShape::DrawGetSupportingFace	(	DebugRenderer *	inRenderer,
		RMat44Arg	inCenterOfMassTransform,
		Vec3Arg	inScale
	)		const

overridevirtual

Draw the results of the GetSupportingFace function to show any errors introduced by this process (only relevant for convex shapes)

Reimplemented from Shape.

◆ GetCenterOfMass()

virtual Vec3 CompoundShape::GetCenterOfMass ( ) const

inlineoverridevirtual

All shapes are centered around their center of mass. This function returns the center of mass position that needs to be applied to transform the shape to where it was created.

Reimplemented from Shape.

◆ GetCompoundUserData()

uint32 CompoundShape::GetCompoundUserData ( uint inIdx ) const

inline

Get the user data associated with a shape in this compound.

◆ GetInnerRadius()

virtual float CompoundShape::GetInnerRadius ( ) const

inlineoverridevirtual

Returns the radius of the biggest sphere that fits entirely in the shape. In case this shape consists of multiple sub shapes, it returns the smallest sphere of the parts. This can be used as a measure of how far the shape can be moved without risking going through geometry.

Implements Shape.

◆ GetIntersectingSubShapes() [1/2]

virtual int CompoundShape::GetIntersectingSubShapes	(	const AABox &	inBox,
		uint *	outSubShapeIndices,
		int	inMaxSubShapeIndices
	)		const

pure virtual

Get which sub shape's bounding boxes overlap with an axis aligned box

Parameters

inBox	The axis aligned box to test against (relative to the center of mass of this shape)
outSubShapeIndices	Buffer where to place the indices of the sub shapes that intersect
inMaxSubShapeIndices	How many indices will fit in the buffer (normally you'd provide a buffer of GetNumSubShapes() indices)

Returns: How many indices were placed in outSubShapeIndices

Implemented in MutableCompoundShape, and StaticCompoundShape.

◆ GetIntersectingSubShapes() [2/2]

virtual int CompoundShape::GetIntersectingSubShapes	(	const OrientedBox &	inBox,
		uint *	outSubShapeIndices,
		int	inMaxSubShapeIndices
	)		const

pure virtual

Get which sub shape's bounding boxes overlap with an axis aligned box

Parameters

inBox	The axis aligned box to test against (relative to the center of mass of this shape)
outSubShapeIndices	Buffer where to place the indices of the sub shapes that intersect
inMaxSubShapeIndices	How many indices will fit in the buffer (normally you'd provide a buffer of GetNumSubShapes() indices)

Returns: How many indices were placed in outSubShapeIndices

Implemented in MutableCompoundShape, and StaticCompoundShape.

◆ GetLocalBounds()

virtual AABox CompoundShape::GetLocalBounds ( ) const

inlineoverridevirtual

Get local bounding box including convex radius, this box is centered around the center of mass rather than the world transform.

Implements Shape.

◆ GetMassProperties()

MassProperties CompoundShape::GetMassProperties ( ) const

overridevirtual

Calculate the mass and inertia of this shape.

Implements Shape.

◆ GetMaterial()

const PhysicsMaterial * CompoundShape::GetMaterial ( const SubShapeID & inSubShapeID ) const

overridevirtual

Get the material assigned to a particular sub shape ID.

Implements Shape.

◆ GetNumSubShapes()

uint CompoundShape::GetNumSubShapes ( ) const

inline

Get the total number of sub shapes.

◆ GetStatsRecursive()

Shape::Stats CompoundShape::GetStatsRecursive ( VisitedShapes & ioVisitedShapes ) const

overridevirtual

Volume of this shape (m^3). Note that for compound shapes the volume may be incorrect since child shapes can overlap which is not accounted for.

Get the combined stats of this shape and its children.

Parameters

ioVisitedShapes is used to track which shapes have already been visited, to avoid calculating the wrong memory size.

Reimplemented from Shape.

◆ GetSubmergedVolume()

void CompoundShape::GetSubmergedVolume	(	Mat44Arg	inCenterOfMassTransform,
		Vec3Arg	inScale,
		const Plane &	inSurface,
		float &	outTotalVolume,
		float &	outSubmergedVolume,
		Vec3 &outCenterOfBuoyancy	JPH_IF_DEBUG_RENDERER, RVec3Arg inBaseOffset
	)		const

overridevirtual

◆ GetSubShape()

const SubShape & CompoundShape::GetSubShape ( uint inIdx ) const

inline

Access to a particular sub shape.

◆ GetSubShapeIDBits()

uint CompoundShape::GetSubShapeIDBits ( ) const

inlineprotected

Determine amount of bits needed to encode sub shape id.

◆ GetSubShapeIDBitsRecursive()

uint CompoundShape::GetSubShapeIDBitsRecursive ( ) const

overridevirtual

Get the max number of sub shape ID bits that are needed to be able to address any leaf shape in this shape. Used mainly for checking that it is smaller or equal than SubShapeID::MaxBits.

Implements Shape.

◆ GetSubShapeIDFromIndex()

SubShapeIDCreator CompoundShape::GetSubShapeIDFromIndex	(	int	inIdx,
		const SubShapeIDCreator &	inParentSubShapeID
	)		const

inline

Convert a sub shape index to a sub shape ID.

Parameters

inIdx	Index of the sub shape of this compound
inParentSubShapeID	Parent SubShapeID (describing the path to the compound shape)

Returns: A sub shape ID creator that contains the full path to the sub shape with index inIdx

◆ GetSubShapeIndexFromID()

uint32 CompoundShape::GetSubShapeIndexFromID	(	SubShapeID	inSubShapeID,
		SubShapeID &	outRemainder
	)		const

inline

Convert SubShapeID to sub shape index

Parameters

inSubShapeID	Sub shape id that indicates the leaf shape relative to this shape
outRemainder	This is the sub shape ID for the sub shape of the compound after popping off the index

Returns: The index of the sub shape of this compound

◆ GetSubShapes()

const SubShapes & CompoundShape::GetSubShapes ( ) const

inline

Access to the sub shapes of this compound.

◆ GetSubShapeTransformedShape()

TransformedShape CompoundShape::GetSubShapeTransformedShape	(	const SubShapeID &	inSubShapeID,
		Vec3Arg	inPositionCOM,
		QuatArg	inRotation,
		Vec3Arg	inScale,
		SubShapeID &	outRemainder
	)		const

overridevirtual

Get the direct child sub shape and its transform for a sub shape ID.

Parameters

inSubShapeID	Sub shape ID that indicates the path to the leaf shape
inPositionCOM	The position of the center of mass of this shape
inRotation	The orientation of this shape
inScale	Scale of this shape
outRemainder	The remainder of the sub shape ID after removing the sub shape

Returns: Direct child sub shape and its transform, note that the body ID and sub shape ID will be invalid

Reimplemented from Shape.

◆ GetSubShapeUserData()

uint64 CompoundShape::GetSubShapeUserData ( const SubShapeID & inSubShapeID ) const

overridevirtual

Get the user data of a particular sub shape ID.

Reimplemented from Shape.

◆ GetSupportingFace()

void CompoundShape::GetSupportingFace	(	const SubShapeID &	inSubShapeID,
		Vec3Arg	inDirection,
		Vec3Arg	inScale,
		Mat44Arg	inCenterOfMassTransform,
		SupportingFace &	outVertices
	)		const

overridevirtual

Get the vertices of the face that faces inDirection the most (includes any convex radius). Note that this function can only return faces of convex shapes or triangles, which is why a sub shape ID to get to that leaf must be provided.

Parameters

inSubShapeID	Sub shape ID of target shape
inDirection	Direction that the face should be facing (in local space to this shape)
inCenterOfMassTransform	Transform to transform outVertices with
inScale	Scale of this shape
outVertices	Resulting face. The returned face can be empty if the shape doesn't have polygons to return (e.g. because it's a sphere). The face will be returned in world space.

Reimplemented from Shape.

◆ GetSurfaceNormal()

Vec3 CompoundShape::GetSurfaceNormal	(	const SubShapeID &	inSubShapeID,
		Vec3Arg	inLocalSurfacePosition
	)		const

overridevirtual

Get the surface normal of a particular sub shape ID and point on surface (all vectors are relative to center of mass for this shape). Note: When you have a CollideShapeResult or ShapeCastResult you should use -mPenetrationAxis.Normalized() as contact normal as GetSurfaceNormal will only return face normals (and not vertex or edge normals).

Implements Shape.

◆ GetTrianglesNext()

virtual int CompoundShape::GetTrianglesNext	(	GetTrianglesContext &	ioContext,
		int	inMaxTrianglesRequested,
		Float3 *	outTriangleVertices,
		const PhysicsMaterial **	outMaterials = `nullptr`
	)		const

inlineoverridevirtual

Call this repeatedly to get all triangles in the box. outTriangleVertices should be large enough to hold 3 * inMaxTriangleRequested entries. outMaterials (if it is not null) should contain inMaxTrianglesRequested entries. The function returns the amount of triangles that it found (which will be <= inMaxTrianglesRequested), or 0 if there are no more triangles. Note that the function can return a value < inMaxTrianglesRequested and still have more triangles to process (triangles can be returned in blocks). Note that the function may return triangles outside of the requested box, only coarse culling is performed on the returned triangles.

Implements Shape.

◆ GetTrianglesStart()

virtual void CompoundShape::GetTrianglesStart	(	GetTrianglesContext &	ioContext,
		const AABox &	inBox,
		Vec3Arg	inPositionCOM,
		QuatArg	inRotation,
		Vec3Arg	inScale
	)		const

inlineoverridevirtual

To start iterating over triangles, call this function first. ioContext is a temporary buffer and should remain untouched until the last call to GetTrianglesNext. inBox is the world space bounding in which you want to get the triangles. inPositionCOM/inRotation/inScale describes the transform of this shape. To get the actual triangles call GetTrianglesNext.

Implements Shape.

◆ GetVolume()

float CompoundShape::GetVolume ( ) const

overridevirtual

Implements Shape.

◆ GetWorldSpaceBounds() [1/3]

AABox Shape::GetWorldSpaceBounds	(	DMat44Arg	inCenterOfMassTransform,
		Vec3Arg	inScale
	)		const

inline

Get world space bounds including convex radius.

◆ GetWorldSpaceBounds() [2/3]

virtual AABox Shape::GetWorldSpaceBounds	(	Mat44Arg	inCenterOfMassTransform,
		Vec3Arg	inScale
	)		const

inlinevirtual

Get world space bounds including convex radius. This shape is scaled by inScale in local space first. This function can be overridden to return a closer fitting world space bounding box, by default it will just transform what GetLocalBounds() returns.

Reimplemented from Shape.

◆ GetWorldSpaceBounds() [3/3]

AABox CompoundShape::GetWorldSpaceBounds	(	Mat44Arg	inCenterOfMassTransform,
		Vec3Arg	inScale
	)		const

overridevirtual

Get world space bounds including convex radius. This shape is scaled by inScale in local space first. This function can be overridden to return a closer fitting world space bounding box, by default it will just transform what GetLocalBounds() returns.

Reimplemented from Shape.

◆ IsSubShapeIDValid()

bool CompoundShape::IsSubShapeIDValid ( SubShapeID inSubShapeID ) const

inline

Check if a sub shape ID is still valid for this shape

Parameters

inSubShapeID Sub shape id that indicates the leaf shape relative to this shape

Returns: True if the ID is valid, false if not

◆ IsValidScale()

bool CompoundShape::IsValidScale ( Vec3Arg inScale ) const

overridevirtual

Test if inScale is a valid scale for this shape. Some shapes can only be scaled uniformly, compound shapes cannot handle shapes being rotated and scaled (this would cause shearing), scale can never be zero. When the scale is invalid, the function will return false.

Here's a list of supported scales:

SphereShape: Scale must be uniform (signs of scale are ignored).
BoxShape: Any scale supported (signs of scale are ignored).
TriangleShape: Any scale supported when convex radius is zero, otherwise only uniform scale supported.
CapsuleShape: Scale must be uniform (signs of scale are ignored).
TaperedCapsuleShape: Scale must be uniform (sign of Y scale can be used to flip the capsule).
CylinderShape: Scale must be uniform in XZ plane, Y can scale independently (signs of scale are ignored).
RotatedTranslatedShape: Scale must not cause shear in the child shape.
CompoundShape: Scale must not cause shear in any of the child shapes.

Reimplemented from Shape.

◆ MustBeStatic()

bool CompoundShape::MustBeStatic ( ) const

overridevirtual

Check if this shape can only be used to create a static body or if it can also be dynamic/kinematic.

Reimplemented from Shape.

◆ RestoreBinaryState()

void CompoundShape::RestoreBinaryState ( StreamIn & inStream )

overrideprotectedvirtual

This function should not be called directly, it is used by sRestoreFromBinaryState.

Reimplemented from Shape.

Reimplemented in MutableCompoundShape, and StaticCompoundShape.

◆ RestoreSubShapeState()

void CompoundShape::RestoreSubShapeState	(	const ShapeRefC *	inSubShapes,
		uint	inNumShapes
	)

overridevirtual

Restore the shape references after calling sRestoreFromBinaryState. Note that the exact same shapes need to be provided in the same order as returned by SaveSubShapeState.

Reimplemented from Shape.

◆ SaveBinaryState()

void CompoundShape::SaveBinaryState ( StreamOut & inStream ) const

overridevirtual

Saves the contents of the shape in binary form to inStream.

Reimplemented from Shape.

Reimplemented in MutableCompoundShape, and StaticCompoundShape.

◆ SaveSubShapeState()

void CompoundShape::SaveSubShapeState ( ShapeList & outSubShapes ) const

overridevirtual

Outputs the shape references that this shape has to outSubShapes.

Reimplemented from Shape.

◆ SetCompoundUserData()

void CompoundShape::SetCompoundUserData	(	uint	inIdx,
		uint32	inUserData
	)

inline

Set the user data associated with a shape in this compound.

◆ sRegister()

void CompoundShape::sRegister ( )

static

◆ TransformShape()

void CompoundShape::TransformShape	(	Mat44Arg	inCenterOfMassTransform,
		TransformedShapeCollector &	ioCollector
	)		const

overridevirtual

Transforms this shape and all of its children with inTransform, resulting shape(s) are passed to ioCollector. Note that not all shapes support all transforms (especially true for scaling), the resulting shape will try to match the transform as accurately as possible.

Parameters

inCenterOfMassTransform	The transform (rotation, translation, scale) that the center of mass of the shape should get
ioCollector	The transformed shapes will be passed to this collector

Reimplemented from Shape.

Member Data Documentation

◆ mCenterOfMass

Vec3 CompoundShape::mCenterOfMass { Vec3::sZero() }

protected

Center of mass of the compound.

◆ mInnerRadius

float CompoundShape::mInnerRadius = FLT_MAX

protected

Smallest radius of GetInnerRadius() of child shapes.

◆ mLocalBounds

AABox CompoundShape::mLocalBounds

protected

◆ mSubShapes

SubShapes CompoundShape::mSubShapes

protected

The documentation for this class was generated from the following files:

Jolt/Physics/Collision/Shape/CompoundShape.h
Jolt/Physics/Collision/Shape/CompoundShape.cpp

Classes

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ SubShapes

Constructor & Destructor Documentation

◆ CompoundShape() [1/2]

◆ CompoundShape() [2/2]

Member Function Documentation

◆ CalculateInnerRadius()

◆ CollideSoftBodyVertices()

◆ Draw()

◆ DrawGetSupportFunction()

◆ DrawGetSupportingFace()

◆ GetCenterOfMass()

◆ GetCompoundUserData()

◆ GetInnerRadius()

◆ GetIntersectingSubShapes() [1/2]

◆ GetIntersectingSubShapes() [2/2]

◆ GetLocalBounds()

◆ GetMassProperties()

◆ GetMaterial()

◆ GetNumSubShapes()

◆ GetStatsRecursive()

◆ GetSubmergedVolume()

◆ GetSubShape()

◆ GetSubShapeIDBits()

◆ GetSubShapeIDBitsRecursive()

◆ GetSubShapeIDFromIndex()

◆ GetSubShapeIndexFromID()

◆ GetSubShapes()

◆ GetSubShapeTransformedShape()

◆ GetSubShapeUserData()

◆ GetSupportingFace()

◆ GetSurfaceNormal()

◆ GetTrianglesNext()

◆ GetTrianglesStart()

◆ GetVolume()

◆ GetWorldSpaceBounds() [1/3]

◆ GetWorldSpaceBounds() [2/3]

◆ GetWorldSpaceBounds() [3/3]

◆ IsSubShapeIDValid()

◆ IsValidScale()

◆ MustBeStatic()

◆ RestoreBinaryState()

◆ RestoreSubShapeState()

◆ SaveBinaryState()

◆ SaveSubShapeState()

◆ SetCompoundUserData()

◆ sRegister()

◆ TransformShape()

Member Data Documentation

◆ mCenterOfMass

◆ mInnerRadius

◆ mLocalBounds

◆ mSubShapes