PxTetrahedronMeshExt#

Defined in include/extensions/PxTetrahedronMeshExt.h

class PxTetrahedronMeshExt#

utility functions for use with PxTetrahedronMesh and subclasses

Public Static Functions

static PxI32 findTetrahedronContainingPoint(
const PxTetrahedronMesh *mesh,
const PxVec3 &point,
PxVec4 &bary,
PxReal tolerance = 1e-6f,
)#

Returns the index of the tetrahedron that contains a point.

Parameters:

  • mesh – [in] The tetmesh

  • point – [in] The point to find the enclosing tetrahedron for

  • bary – [in] The barycentric coordinates of the point inside the enclosing tetrahedron

  • tolerance – [in] Tolerance value used classify points as inside if they lie exactly a tetrahedron’s surface

Returns:

The index of the tetrahedron containing the point, -1 if not tetrahedron contains the opoint

static PxI32 findTetrahedronClosestToPoint(
const PxTetrahedronMesh *mesh,
const PxVec3 &point,
PxVec4 &bary,
)#

Returns the index of the tetrahedron closest to a point.

Parameters:

  • mesh – [in] The tetmesh

  • point – [in] The point to find the closest tetrahedron for

  • bary – [out] The barycentric coordinates of the point in the tetrahedron

Returns:

The index of the tetrahedron closest to the point

static void createPointsToTetrahedronMap(
const PxArray<PxVec3> &tetMeshVertices,
const PxArray<PxU32> &tetMeshIndices,
const PxArray<PxVec3> &pointsToEmbed,
PxArray<PxVec4> &barycentricCoordinates,
PxArray<PxU32> &tetLinks,
)#

Associates points with closest tetrahedra from input tetrahedral mesh.

If the tetmesh does not have any tetrahedra or points, a warning will be generated and the result arrays will be empty, even if there are query points passed into the method.

Parameters:

  • tetMeshVertices – [in] The tetrahedral mesh vertices

  • tetMeshIndices – [in] The tetraheral mesh indices

  • pointsToEmbed – [in] The points for which the embedding should be created

  • barycentricCoordinates – [in] The output barycentric coordinates for each input point relative to its closest tetrahedron

  • tetLinks – [in] The output indices of the closest tetrahedron for each input point

static void extractTetMeshSurface(
const void *tetrahedra,
PxU32 numTetrahedra,
bool sixteenBitIndices,
PxArray<PxU32> &surfaceTriangles,
PxArray<PxU32> *surfaceTriangleToTet = NULL,
bool flipTriangleOrientation = false,
)#

Extracts the surface triangles of a tetmesh.

The extracted triangle’s vertex indices point to the vertex buffer of the tetmesh.

Parameters:

  • tetrahedra – [in] The tetrahedra indices

  • numTetrahedra – [in] The number of tetrahedra

  • sixteenBitIndices – [in] If set to true, the tetrahedra indices are read as 16bit integers, otherwise 32bit integers are used

  • surfaceTriangles – [in] The resulting surface triangles

  • surfaceTriangleToTet – [in] Optional array to get the index of a tetrahedron that is adjacent to the surface triangle with the corresponding index

  • flipTriangleOrientation – [in] Reverses the orientation of the ouput triangles

static void extractTetMeshSurface(
const PxTetrahedronMesh *mesh,
PxArray<PxU32> &surfaceTriangles,
PxArray<PxU32> *surfaceTriangleToTet = NULL,
bool flipTriangleOrientation = false,
)#

Extracts the surface triangles of a tetmesh.

The extracted triangle’s vertex indices point to the vertex buffer of the tetmesh.

Parameters:

  • mesh – [in] The mesh from which the surface shall be computed

  • surfaceTriangles – [in] The resulting surface triangles

  • surfaceTriangleToTet – [in] Optional array to get the index of a tetrahedron that is adjacent to the surface triangle with the corresponding index

  • flipTriangleOrientation – [in] Reverses the orientation of the ouput triangles

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