The btTriangleMesh class is a convenience class derived from btTriangleIndexVertexArray, that provides storage for a concave triangle mesh. More...

#include <btTriangleMesh.h>

Inheritance diagram for btTriangleMesh:

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Collaboration diagram for btTriangleMesh:

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Public Member Functions
	btTriangleMesh (bool use32bitIndices=true, bool use4componentVertices=true)

bool	getUse32bitIndices () const

bool	getUse4componentVertices () const

void	addTriangle (const btVector3 &vertex0, const btVector3 &vertex1, const btVector3 &vertex2, bool removeDuplicateVertices=false)
	By default addTriangle won't search for duplicate vertices, because the search is very slow for large triangle meshes.

void	addTriangleIndices (int index1, int index2, int index3)
	Add a triangle using its indices. Make sure the indices are pointing within the vertices array, so add the vertices first (and to be sure, avoid removal of duplicate vertices)

int	getNumTriangles () const

virtual void	preallocateVertices (int numverts)

virtual void	preallocateIndices (int numindices)

int	findOrAddVertex (const btVector3 &vertex, bool removeDuplicateVertices)
	findOrAddVertex is an internal method, use addTriangle instead

void	addIndex (int index)
	addIndex is an internal method, use addTriangle instead

Public Member Functions inherited from btTriangleIndexVertexArray
	BT_DECLARE_ALIGNED_ALLOCATOR ()

	btTriangleIndexVertexArray ()

virtual	~btTriangleIndexVertexArray ()

	btTriangleIndexVertexArray (int numTriangles, int triangleIndexBase, int triangleIndexStride, int numVertices, btScalar vertexBase, int vertexStride)

void	addIndexedMesh (const btIndexedMesh &mesh, PHY_ScalarType indexType=PHY_INTEGER)

virtual void	getLockedVertexIndexBase (unsigned char vertexbase, int &numverts, PHY_ScalarType &type, int &vertexStride, unsigned char indexbase, int &indexstride, int &numfaces, PHY_ScalarType &indicestype, int subpart=0)
	get read and write access to a subpart of a triangle mesh this subpart has a continuous array of vertices and indices in this way the mesh can be handled as chunks of memory with striding very similar to OpenGL vertexarray support make a call to unLockVertexBase when the read and write access is finished

virtual void	getLockedReadOnlyVertexIndexBase (const unsigned char vertexbase, int &numverts, PHY_ScalarType &type, int &vertexStride, const unsigned char indexbase, int &indexstride, int &numfaces, PHY_ScalarType &indicestype, int subpart=0) const

virtual void	unLockVertexBase (int subpart)
	unLockVertexBase finishes the access to a subpart of the triangle mesh make a call to unLockVertexBase when the read and write access (using getLockedVertexIndexBase) is finished

virtual void	unLockReadOnlyVertexBase (int subpart) const

virtual int	getNumSubParts () const
	getNumSubParts returns the number of seperate subparts each subpart has a continuous array of vertices and indices

IndexedMeshArray &	getIndexedMeshArray ()

const IndexedMeshArray &	getIndexedMeshArray () const

virtual bool	hasPremadeAabb () const

virtual void	setPremadeAabb (const btVector3 &aabbMin, const btVector3 &aabbMax) const

virtual void	getPremadeAabb (btVector3 aabbMin, btVector3 aabbMax) const

Public Member Functions inherited from btStridingMeshInterface
	BT_DECLARE_ALIGNED_ALLOCATOR ()

	btStridingMeshInterface ()

virtual	~btStridingMeshInterface ()

virtual void	InternalProcessAllTriangles (btInternalTriangleIndexCallback *callback, const btVector3 &aabbMin, const btVector3 &aabbMax) const

void	calculateAabbBruteForce (btVector3 &aabbMin, btVector3 &aabbMax)
	brute force method to calculate aabb

const btVector3 &	getScaling () const

void	setScaling (const btVector3 &scaling)

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 Attributes
btScalar	m_weldingThreshold

Additional Inherited Members
Protected Attributes inherited from btTriangleIndexVertexArray
IndexedMeshArray	m_indexedMeshes

int	m_pad [2]

int	m_hasAabb

btVector3	m_aabbMin

btVector3	m_aabbMax

Protected Attributes inherited from btStridingMeshInterface
btVector3	m_scaling

Detailed Description

The btTriangleMesh class is a convenience class derived from btTriangleIndexVertexArray, that provides storage for a concave triangle mesh.

It can be used as data for the btBvhTriangleMeshShape. It allows either 32bit or 16bit indices, and 4 (x-y-z-w) or 3 (x-y-z) component vertices. If you want to share triangle/index data between graphics mesh and collision mesh (btBvhTriangleMeshShape), you can directly use btTriangleIndexVertexArray or derive your own class from btStridingMeshInterface. Performance of btTriangleMesh and btTriangleIndexVertexArray used in a btBvhTriangleMeshShape is the same.

Definition at line 27 of file btTriangleMesh.h.

Constructor & Destructor Documentation

◆ btTriangleMesh()

btTriangleMesh::btTriangleMesh	(	bool	use32bitIndices = true,
		bool	use4componentVertices = true )

Definition at line 21 of file btTriangleMesh.cpp.

Member Function Documentation

◆ addIndex()

void btTriangleMesh::addIndex ( int index )

addIndex is an internal method, use addTriangle instead

Definition at line 65 of file btTriangleMesh.cpp.

◆ addTriangle()

void btTriangleMesh::addTriangle	(	const btVector3 &	vertex0,
		const btVector3 &	vertex1,
		const btVector3 &	vertex2,
		bool	removeDuplicateVertices = false )

By default addTriangle won't search for duplicate vertices, because the search is very slow for large triangle meshes.

In general it is better to directly use btTriangleIndexVertexArray instead.

Definition at line 132 of file btTriangleMesh.cpp.

◆ addTriangleIndices()

void btTriangleMesh::addTriangleIndices	(	int	index1,
		int	index2,
		int	index3 )

Add a triangle using its indices. Make sure the indices are pointing within the vertices array, so add the vertices first (and to be sure, avoid removal of duplicate vertices)

Definition at line 78 of file btTriangleMesh.cpp.

◆ findOrAddVertex()

int btTriangleMesh::findOrAddVertex	(	const btVector3 &	vertex,
		bool	removeDuplicateVertices )

findOrAddVertex is an internal method, use addTriangle instead

Definition at line 86 of file btTriangleMesh.cpp.

◆ getNumTriangles()

int btTriangleMesh::getNumTriangles ( ) const

Definition at line 140 of file btTriangleMesh.cpp.

◆ getUse32bitIndices()

bool btTriangleMesh::getUse32bitIndices ( ) const

inline

Definition at line 43 of file btTriangleMesh.h.

◆ getUse4componentVertices()

bool btTriangleMesh::getUse4componentVertices ( ) const

inline

Definition at line 48 of file btTriangleMesh.h.

◆ preallocateIndices()

void btTriangleMesh::preallocateIndices ( int numindices )

virtual

Reimplemented from btTriangleIndexVertexArray.

Definition at line 160 of file btTriangleMesh.cpp.

◆ preallocateVertices()

void btTriangleMesh::preallocateVertices ( int numverts )

virtual

Reimplemented from btTriangleIndexVertexArray.

Definition at line 149 of file btTriangleMesh.cpp.

Member Data Documentation

◆ m_16bitIndices

btAlignedObjectArray<unsigned short int> btTriangleMesh::m_16bitIndices

private

Definition at line 33 of file btTriangleMesh.h.

◆ m_32bitIndices

btAlignedObjectArray<unsigned int> btTriangleMesh::m_32bitIndices

private

Definition at line 32 of file btTriangleMesh.h.

◆ m_3componentVertices

btAlignedObjectArray<btScalar> btTriangleMesh::m_3componentVertices

private

Definition at line 30 of file btTriangleMesh.h.

◆ m_4componentVertices

btAlignedObjectArray<btVector3> btTriangleMesh::m_4componentVertices

private

Definition at line 29 of file btTriangleMesh.h.

◆ m_use32bitIndices

bool btTriangleMesh::m_use32bitIndices

private

Definition at line 34 of file btTriangleMesh.h.

◆ m_use4componentVertices

bool btTriangleMesh::m_use4componentVertices

private

Definition at line 35 of file btTriangleMesh.h.

◆ m_weldingThreshold

btScalar btTriangleMesh::m_weldingThreshold

Definition at line 39 of file btTriangleMesh.h.

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

Private Attributes
btAlignedObjectArray< btVector3 >	m_4componentVertices

btAlignedObjectArray< btScalar >	m_3componentVertices

btAlignedObjectArray< unsigned int >	m_32bitIndices

btAlignedObjectArray< unsigned short int >	m_16bitIndices

bool	m_use32bitIndices

bool	m_use4componentVertices

Public Member Functions

Public Attributes

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ btTriangleMesh()

Member Function Documentation

◆ addIndex()

◆ addTriangle()

◆ addTriangleIndices()

◆ findOrAddVertex()

◆ getNumTriangles()

◆ getUse32bitIndices()

◆ getUse4componentVertices()

◆ preallocateIndices()

◆ preallocateVertices()

Member Data Documentation

◆ m_16bitIndices

◆ m_32bitIndices

◆ m_3componentVertices

◆ m_4componentVertices

◆ m_use32bitIndices

◆ m_use4componentVertices

◆ m_weldingThreshold