GT_OSDLimitSurface Class Reference

Interface to perform limit surface evaluation. More...

#include <GT_OSD3.h>

Public Types
using	TopologyRefiner = OpenSubdiv::Far::TopologyRefiner
using	PtexIndices = OpenSubdiv::Far::PtexIndices
using	PatchTable = OpenSubdiv::Far::PatchTable
using	PatchMap = OpenSubdiv::Far::PatchMap
using	PatchTableFactory = OpenSubdiv::Far::PatchTableFactory
using	AttribId = GT_OSDAttributes::AttribId
using	VertexStorage = GT_OSDAttributes::VertexStorage
using	Vertex = GT_OSDAttributes::Vertex

Public Member Functions
	GT_OSDLimitSurface (const GT_OSDTopology &topology, const GT_OSDAttributes &attribs, const GT_OSDPatchTableOptions &options, const GT_OSDPatchTable &patchTable, const GT_PrimPolygonMesh &mesh)
	~GT_OSDLimitSurface ()
void	dump () const
void	dump (UT_JSONWriter &w) const
bool	update (const GT_OSDAttributes &attribs)
int	ptexFaceCount () const
	Return the number of patches. More...
int	ptexFromFace (GT_Size face_index) const
	Return the first ptex patch associated with the given coarse face. More...
GT_Size	faceFromPtex (int ptex_id, int &offset) const
	Return the coarse face associated with the given ptex id. More...
int	limitSurface (GT_DataArrayHandle *result, GT_DataArrayHandle *result_du, GT_DataArrayHandle *result_dv, const GT_OSDAttributes &alist, const AttribId &attrib, int npts, const int32 *faces, const fpreal32 *u, const fpreal32 *v, int uv_stride=1) const
int	limitSurfaceFVar (const GT_OSDTopology &topology, GT_DataArrayHandle *result, GT_DataArrayHandle *result_du, GT_DataArrayHandle *result_dv, const GT_OSDAttributes &alist, const AttribId &attrib, int npts, const int32 *faces, const fpreal32 *u, const fpreal32 *v, int uv_stride=1) const
	Evaluation of face-varying attributes on the limit surface. More...
int	numPtexPatches (const TopologyRefiner &refiner, GT_Size face_index) const
int	numPtexPatches (const GT_OSDTopology &top, GT_Size face_index) const
bool	coarsePoints (const GT_OSDTopology &topology, GT_Size coarse_face_index, GT_Size *vertices, GT_Size buffer_size) const
bool	coarseVertices (const GT_OSDTopology &topology, GT_Size coarse_face_index, GT_Size *vertices, GT_Size buffer_size) const

Detailed Description

Interface to perform limit surface evaluation.

Definition at line 627 of file GT_OSD3.h.

Member Typedef Documentation

using GT_OSDLimitSurface::AttribId = GT_OSDAttributes::AttribId

Definition at line 635 of file GT_OSD3.h.

using GT_OSDLimitSurface::PatchMap = OpenSubdiv::Far::PatchMap

Definition at line 633 of file GT_OSD3.h.

using GT_OSDLimitSurface::PatchTable = OpenSubdiv::Far::PatchTable

Definition at line 632 of file GT_OSD3.h.

using GT_OSDLimitSurface::PatchTableFactory = OpenSubdiv::Far::PatchTableFactory

Definition at line 634 of file GT_OSD3.h.

using GT_OSDLimitSurface::PtexIndices = OpenSubdiv::Far::PtexIndices

Definition at line 631 of file GT_OSD3.h.

using GT_OSDLimitSurface::TopologyRefiner = OpenSubdiv::Far::TopologyRefiner

Definition at line 630 of file GT_OSD3.h.

using GT_OSDLimitSurface::Vertex = GT_OSDAttributes::Vertex

Definition at line 637 of file GT_OSD3.h.

using GT_OSDLimitSurface::VertexStorage = GT_OSDAttributes::VertexStorage

Definition at line 636 of file GT_OSD3.h.

Constructor & Destructor Documentation

GT_OSDLimitSurface::GT_OSDLimitSurface	(	const GT_OSDTopology &	topology,
		const GT_OSDAttributes &	attribs,
		const GT_OSDPatchTableOptions &	options,
		const GT_OSDPatchTable &	patchTable,
		const GT_PrimPolygonMesh &	mesh
	)

GT_OSDLimitSurface::~GT_OSDLimitSurface

(

)

Member Function Documentation

bool GT_OSDLimitSurface::coarsePoints	(	const GT_OSDTopology &	topology,
		GT_Size	coarse_face_index,
		GT_Size *	vertices,
		GT_Size	buffer_size
	)		const

Query the points/vertices for a face in the coarse mesh

bool GT_OSDLimitSurface::coarseVertices	(	const GT_OSDTopology &	topology,
		GT_Size	coarse_face_index,
		GT_Size *	vertices,
		GT_Size	buffer_size
	)		const

Query the points/vertices for a face in the coarse mesh

void GT_OSDLimitSurface::dump

(

)

const

void GT_OSDLimitSurface::dump

(

UT_JSONWriter &

w

)

const

GT_Size GT_OSDLimitSurface::faceFromPtex	(	int	ptex_id,
		int &	offset
	)		const

Return the coarse face associated with the given ptex id.

int GT_OSDLimitSurface::limitSurface	(	GT_DataArrayHandle *	result,
		GT_DataArrayHandle *	result_du,
		GT_DataArrayHandle *	result_dv,
		const GT_OSDAttributes &	alist,
		const AttribId &	attrib,
		int	npts,
		const int32 *	faces,
		const fpreal32 *	u,
		const fpreal32 *	v,
		int	uv_stride = 1
	)		const

Evaluate the limit surface (and derivatives) at a given coordinates. The faces array should have npts entries. The u and v arrays should have also have npts entries. Each u and v coordinate will be offset by uv_stride entries. So, if you have uv's that are interleaved (i.e. [u0 v0 u1 v1 u2 v2 ...]), you can offset the v pointer and set the stride to 2.

Passing a nullptr for any of the results will disable evaluation of that property.

The method returns the tuple size of the attribute evaluated.

int GT_OSDLimitSurface::limitSurfaceFVar	(	const GT_OSDTopology &	topology,
		GT_DataArrayHandle *	result,
		GT_DataArrayHandle *	result_du,
		GT_DataArrayHandle *	result_dv,
		const GT_OSDAttributes &	alist,
		const AttribId &	attrib,
		int	npts,
		const int32 *	faces,
		const fpreal32 *	u,
		const fpreal32 *	v,
		int	uv_stride = 1
	)		const

Evaluation of face-varying attributes on the limit surface.

int GT_OSDLimitSurface::numPtexPatches	(	const TopologyRefiner &	refiner,
		GT_Size	face_index
	)		const

Return the number of ptex patches for the given coarse face

int GT_OSDLimitSurface::numPtexPatches ( const GT_OSDTopology &  top, GT_Size  face_index  ) const

inline

Return the number of ptex patches for the given coarse face

Definition at line 660 of file GT_OSD3.h.

int GT_OSDLimitSurface::ptexFaceCount

(

)

const

Return the number of patches.

int GT_OSDLimitSurface::ptexFromFace

(

GT_Size

face_index

)

const

Return the first ptex patch associated with the given coarse face.

bool GT_OSDLimitSurface::update

(

const GT_OSDAttributes &

attribs

)

---

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

• GT/GT_OSD3.h