blender::opensubdiv::PatchMap Class Reference

An quadtree-based map connecting coarse faces to their sub-patches. More...

#include <patch_map.h>

Classes
struct	QuadNode

Public Types
using	Handle = OpenSubdiv::Far::PatchTable::PatchHandle

Public Member Functions
	PatchMap (OpenSubdiv::Far::PatchTable const &patchTable)
	Constructor.
Handle const *	FindPatch (int patchFaceId, double u, double v) const
	Returns a handle to the sub-patch of the face at the given (u,v). Note that the patch face ID corresponds to potentially quadrangulated face indices and not the base face indices (see Far::PtexIndices for more details).
int	getMinPatchFace () const
int	getMaxPatchFace () const
int	getMaxDepth () const
bool	getPatchesAreTriangular () const
const std::vector< Handle > &	getHandles ()
const std::vector< QuadNode > &	nodes ()

Detailed Description

An quadtree-based map connecting coarse faces to their sub-patches.

PatchTable::PatchArrays contain lists of patches that represent the limit surface of a mesh, sorted by their topological type. These arrays break the connection between coarse faces and their sub-patches.

The PatchMap provides a quad-tree based lookup structure that, given a singular parametric location, can efficiently return a handle to the sub-patch that contains this location.

Definition at line 25 of file patch_map.h.

Member Typedef Documentation

Handle

using blender::opensubdiv::PatchMap::Handle = OpenSubdiv::Far::PatchTable::PatchHandle

Definition at line 49 of file patch_map.h.

Constructor & Destructor Documentation

PatchMap()

blender::opensubdiv::PatchMap::PatchMap

(

OpenSubdiv::Far::PatchTable const &

patchTable

)

Constructor.

Parameters

patchTable

A valid PatchTable

Definition at line 77 of file patch_map.cc.

Member Function Documentation

FindPatch()

PatchMap::Handle const * blender::opensubdiv::PatchMap::FindPatch ( int patchFaceId, double u, double v ) const

inline

Returns a handle to the sub-patch of the face at the given (u,v). Note that the patch face ID corresponds to potentially quadrangulated face indices and not the base face indices (see Far::PtexIndices for more details).

Returns a handle to the sub-patch of the face at the given (u,v).

Parameters

patchFaceId	The index of the patch (Ptex) face
u	Local u parameter
v	Local v parameter

Returns

A patch handle or 0 if the face is not supported (index out of bounds) or is tagged as a hole

Definition at line 201 of file patch_map.h.

References assert, blender::opensubdiv::PatchMap::QuadNode::children, blender::opensubdiv::PatchMap::QuadNode::Child::index, blender::opensubdiv::PatchMap::QuadNode::Child::isLeaf, blender::opensubdiv::PatchMap::QuadNode::Child::isSet, and v.

Referenced by blender::opensubdiv::convertPatchCoordsToArray().

getHandles()

const std::vector< Handle > & blender::opensubdiv::PatchMap::getHandles ( )

inline

Definition at line 93 of file patch_map.h.

getMaxDepth()

int blender::opensubdiv::PatchMap::getMaxDepth ( ) const

inline

Definition at line 83 of file patch_map.h.

getMaxPatchFace()

int blender::opensubdiv::PatchMap::getMaxPatchFace ( ) const

inline

Definition at line 78 of file patch_map.h.

getMinPatchFace()

int blender::opensubdiv::PatchMap::getMinPatchFace ( ) const

inline

Definition at line 73 of file patch_map.h.

getPatchesAreTriangular()

bool blender::opensubdiv::PatchMap::getPatchesAreTriangular ( ) const

inline

Definition at line 88 of file patch_map.h.

nodes()

const std::vector< QuadNode > & blender::opensubdiv::PatchMap::nodes ( )

inline

Definition at line 98 of file patch_map.h.

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

• patch_map.h
• patch_map.cc