The btConvexTriangleMeshShape is a convex hull of a triangle mesh, but the performance is not as good as btConvexHullShape. More...

#include <btConvexTriangleMeshShape.h>

Inheritance diagram for btConvexTriangleMeshShape:

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Collaboration diagram for btConvexTriangleMeshShape:

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Public Member Functions
	BT_DECLARE_ALIGNED_ALLOCATOR ()

	btConvexTriangleMeshShape (btStridingMeshInterface *meshInterface, bool calcAabb=true)

class btStridingMeshInterface *	getMeshInterface ()

const class btStridingMeshInterface *	getMeshInterface () const

virtual btVector3	localGetSupportingVertex (const btVector3 &vec) const

virtual btVector3	localGetSupportingVertexWithoutMargin (const btVector3 &vec) const

virtual void	batchedUnitVectorGetSupportingVertexWithoutMargin (const btVector3 vectors, btVector3 supportVerticesOut, int numVectors) const

virtual const char *	getName () const

virtual int	getNumVertices () const

virtual int	getNumEdges () const

virtual void	getEdge (int i, btVector3 &pa, btVector3 &pb) const

virtual void	getVertex (int i, btVector3 &vtx) const

virtual int	getNumPlanes () const

virtual void	getPlane (btVector3 &planeNormal, btVector3 &planeSupport, int i) const

virtual bool	isInside (const btVector3 &pt, btScalar tolerance) const

virtual void	setLocalScaling (const btVector3 &scaling)

virtual const btVector3 &	getLocalScaling () const

void	calculatePrincipalAxisTransform (btTransform &principal, btVector3 &inertia, btScalar &volume) const
	computes the exact moment of inertia and the transform from the coordinate system defined by the principal axes of the moment of inertia and the center of mass to the current coordinate system.

Public Member Functions inherited from btPolyhedralConvexAabbCachingShape
void	getNonvirtualAabb (const btTransform &trans, btVector3 &aabbMin, btVector3 &aabbMax, btScalar margin) const

virtual void	getAabb (const btTransform &t, btVector3 &aabbMin, btVector3 &aabbMax) const
	getAabb's default implementation is brute force, expected derived classes to implement a fast dedicated version

void	recalcLocalAabb ()

Public Member Functions inherited from btPolyhedralConvexShape
	BT_DECLARE_ALIGNED_ALLOCATOR ()

	btPolyhedralConvexShape ()

virtual	~btPolyhedralConvexShape ()

virtual bool	initializePolyhedralFeatures (int shiftVerticesByMargin=0)
	optional method mainly used to generate multiple contact points by clipping polyhedral features (faces/edges) experimental/work-in-progress

virtual void	setPolyhedralFeatures (btConvexPolyhedron &polyhedron)

const btConvexPolyhedron *	getConvexPolyhedron () const

virtual void	calculateLocalInertia (btScalar mass, btVector3 &inertia) const

Public Member Functions inherited from btConvexInternalShape
	BT_DECLARE_ALIGNED_ALLOCATOR ()

virtual	~btConvexInternalShape ()

const btVector3 &	getImplicitShapeDimensions () const

void	setImplicitShapeDimensions (const btVector3 &dimensions)
	warning: use setImplicitShapeDimensions with care changing a collision shape while the body is in the world is not recommended, it is best to remove the body from the world, then make the change, and re-add it alternatively flush the contact points, see documentation for 'cleanProxyFromPairs'

void	setSafeMargin (btScalar minDimension, btScalar defaultMarginMultiplier=0.1f)

void	setSafeMargin (const btVector3 &halfExtents, btScalar defaultMarginMultiplier=0.1f)

virtual void	getAabbSlow (const btTransform &t, btVector3 &aabbMin, btVector3 &aabbMax) const

const btVector3 &	getLocalScalingNV () const

virtual void	setMargin (btScalar margin)

virtual btScalar	getMargin () const

btScalar	getMarginNV () const

virtual int	getNumPreferredPenetrationDirections () const

virtual void	getPreferredPenetrationDirection (int index, btVector3 &penetrationVector) const

virtual int	calculateSerializeBufferSize () const

virtual const char *	serialize (void dataBuffer, btSerializer serializer) const
	fills the dataBuffer and returns the struct name (and 0 on failure)

Public Member Functions inherited from btConvexShape
	BT_DECLARE_ALIGNED_ALLOCATOR ()

	btConvexShape ()
	not supported on IBM SDK, until we fix the alignment of btVector3

virtual	~btConvexShape ()

btVector3	localGetSupportVertexWithoutMarginNonVirtual (const btVector3 &vec) const

btVector3	localGetSupportVertexNonVirtual (const btVector3 &vec) const

btScalar	getMarginNonVirtual () const

void	getAabbNonVirtual (const btTransform &t, btVector3 &aabbMin, btVector3 &aabbMax) const

virtual void	project (const btTransform &trans, const btVector3 &dir, btScalar &minProj, btScalar &maxProj, btVector3 &witnesPtMin, btVector3 &witnesPtMax) const

Public Member Functions inherited from btCollisionShape
	BT_DECLARE_ALIGNED_ALLOCATOR ()

	btCollisionShape ()

virtual	~btCollisionShape ()

virtual void	getBoundingSphere (btVector3 &center, btScalar &radius) const

virtual btScalar	getAngularMotionDisc () const
	getAngularMotionDisc returns the maximum radius needed for Conservative Advancement to handle time-of-impact with rotations.

virtual btScalar	getContactBreakingThreshold (btScalar defaultContactThresholdFactor) const

void	calculateTemporalAabb (const btTransform &curTrans, const btVector3 &linvel, const btVector3 &angvel, btScalar timeStep, btVector3 &temporalAabbMin, btVector3 &temporalAabbMax) const
	calculateTemporalAabb calculates the enclosing aabb for the moving object over interval [0..timeStep) result is conservative

bool	isPolyhedral () const

bool	isConvex2d () const

bool	isConvex () const

bool	isNonMoving () const

bool	isConcave () const

bool	isCompound () const

bool	isSoftBody () const

bool	isInfinite () const
	isInfinite is used to catch simulation error (aabb check)

int	getShapeType () const

virtual btVector3	getAnisotropicRollingFrictionDirection () const
	the getAnisotropicRollingFrictionDirection can be used in combination with setAnisotropicFriction See Bullet/Demos/RollingFrictionDemo for an example

void	setUserPointer (void *userPtr)
	optional user data pointer

void *	getUserPointer () const

void	setUserIndex (int index)

int	getUserIndex () const

void	setUserIndex2 (int index)

int	getUserIndex2 () const

virtual void	serializeSingleShape (btSerializer *serializer) const

Private Attributes
class btStridingMeshInterface *	m_stridingMesh

Additional Inherited Members
Protected Member Functions inherited from btPolyhedralConvexAabbCachingShape
void	setCachedLocalAabb (const btVector3 &aabbMin, const btVector3 &aabbMax)

void	getCachedLocalAabb (btVector3 &aabbMin, btVector3 &aabbMax) const

	btPolyhedralConvexAabbCachingShape ()

Protected Member Functions inherited from btConvexInternalShape
	btConvexInternalShape ()

Protected Attributes inherited from btPolyhedralConvexShape
btConvexPolyhedron *	m_polyhedron

Protected Attributes inherited from btConvexInternalShape
btVector3	m_localScaling

btVector3	m_implicitShapeDimensions

btScalar	m_collisionMargin

btScalar	m_padding

Protected Attributes inherited from btCollisionShape
int	m_shapeType

void *	m_userPointer

int	m_userIndex

int	m_userIndex2

Detailed Description

The btConvexTriangleMeshShape is a convex hull of a triangle mesh, but the performance is not as good as btConvexHullShape.

A small benefit of this class is that it uses the btStridingMeshInterface, so you can avoid the duplication of the triangle mesh data. Nevertheless, most users should use the much better performing btConvexHullShape instead.

Definition at line 23 of file btConvexTriangleMeshShape.h.

Constructor & Destructor Documentation

◆ btConvexTriangleMeshShape()

btConvexTriangleMeshShape::btConvexTriangleMeshShape	(	btStridingMeshInterface *	meshInterface,
		bool	calcAabb = `true`
	)

Definition at line 22 of file btConvexTriangleMeshShape.cpp.

Member Function Documentation

◆ batchedUnitVectorGetSupportingVertexWithoutMargin()

void btConvexTriangleMeshShape::batchedUnitVectorGetSupportingVertexWithoutMargin	(	const btVector3 *	vectors,
		btVector3 *	supportVerticesOut,
		int	numVectors
	)		const

virtual

Reimplemented from btPolyhedralConvexShape.

Definition at line 93 of file btConvexTriangleMeshShape.cpp.

◆ BT_DECLARE_ALIGNED_ALLOCATOR()

btConvexTriangleMeshShape::BT_DECLARE_ALIGNED_ALLOCATOR ( )

◆ calculatePrincipalAxisTransform()

void btConvexTriangleMeshShape::calculatePrincipalAxisTransform	(	btTransform &	principal,
		btVector3 &	inertia,
		btScalar &	volume
	)		const

computes the exact moment of inertia and the transform from the coordinate system defined by the principal axes of the moment of inertia and the center of mass to the current coordinate system.

A mass of 1 is assumed, for other masses just multiply the computed "inertia" by the mass. The resulting transform "principal" has to be applied inversely to the mesh in order for the local coordinate system of the shape to be centered at the center of mass and to coincide with the principal axes. This also necessitates a correction of the world transform of the collision object by the principal transform. This method also computes the volume of the convex mesh.

Definition at line 184 of file btConvexTriangleMeshShape.cpp.