NAME¶

SoNormalCache - The SoNormalCache class is used to hold cached normals. As an extension to the original SGI Open Inventor v2.1 API, it is also possible to generate normals using this class.

SYNOPSIS¶

#include <Inventor/caches/SoNormalCache.h> Inherits SoCache.

Public Member Functions¶

SoNormalCache (SoState *const state) virtual ~SoNormalCache () void set (const int num, const SbVec3f *const normals) void set (SoNormalGenerator *generator) int getNum (void) const const SbVec3f * getNormals (void) const int getNumIndices (void) const const int32_t * getIndices (void) const void generatePerVertex (const SbVec3f *const coords, const unsigned int numcoords, const int32_t *coordindices, const int numcoordindices, const float crease_angle, const SbVec3f *facenormals=NULL, const int numfacenormals=-1, const SbBool ccw=TRUE, const SbBool tristrip=FALSE) void generatePerFace (const SbVec3f *const coords, const unsigned int numcoords, const int32_t *coordindices, const int numcoorindices, const SbBool ccw) void generatePerFaceStrip (const SbVec3f *const coords, const unsigned int numcoords, const int32_t *coordindices, const int numcoorindices, const SbBool ccw) void generatePerStrip (const SbVec3f *const coords, const unsigned int numcoords, const int32_t *coordindices, const int numcoorindices, const SbBool ccw) void generatePerVertexQuad (const SbVec3f *const coords, const unsigned int numcoords, const int vPerRow, const int vPerColumn, const SbBool ccw) void generatePerFaceQuad (const SbVec3f *const coords, const unsigned int numcoords, const int vPerRow, const int vPerColumn, const SbBool ccw) void generatePerRowQuad (const SbVec3f *const coords, const unsigned int numcoords, const int vPerRow, const int vPerColumn, const SbBool ccw)

Additional Inherited Members¶

Detailed Description¶

The SoNormalCache class is used to hold cached normals. As an extension to the original SGI Open Inventor v2.1 API, it is also possible to generate normals using this class. It is more powerful and easier to use than the SoNormalGenerator class. It is possible to generate normals per vertex with indices (using much less memory than plain per vertex normals), and it contains special methods to generate normals for triangle strips and quads.

Constructor & Destructor Documentation¶

SoNormalCache::SoNormalCache ( SoState *conststate)¶

Contructor with state being the current state.

SoNormalCache::~SoNormalCache () [virtual]¶

Destructor

Member Function Documentation¶

void SoNormalCache::set (const intnum, const SbVec3f *constnormals)¶

Sets an array of normals for this cache. The normals will not be deleted when the instance is deleted.

void SoNormalCache::set ( SoNormalGenerator *generator)¶

Uses a normal generator in this cache. The normal generator will be deleted when the cache is deleted or reset.

int SoNormalCache::getNum (void) const¶

Returns the number of normals in the cache.

const SbVec3f * SoNormalCache::getNormals (void) const¶

Return a pointer to the normals in this cache.

int SoNormalCache::getNumIndices (void) const¶

Returns the number of indices in this cache. Normals are generated with PER_VERTEX_INDEXED binding.

const int32_t * SoNormalCache::getIndices (void) const¶

Returns the normal indices.

void SoNormalCache::generatePerVertex (const SbVec3f *constcoords, const unsigned intnumcoords, const int32_t *vindex, const intnumvi, const floatcrease_angle, const SbVec3f *facenormals = NULL, const intnumfacenormals = -1, const SbBoolccw = TRUE, const SbBooltristrip = FALSE)¶

Generates normals for each vertex for each face. It is possible to specify face normals if these have been calculated somewhere else, otherwise the face normals will be calculated before the vertex normals are calculated. tristrip should be TRUE if the geometry consists of triangle strips.

void SoNormalCache::generatePerFace (const SbVec3f *constcoords, const unsigned intnumcoords, const int32_t *cind, const intnv, const SbBoolccw)¶

Generates face normals for the faceset defined by coords and cind.

void SoNormalCache::generatePerFaceStrip (const SbVec3f *constcoords, const unsigned intnumcoords, const int32_t *cind, const intnv, const SbBoolccw)¶

Generates face normals for triangle strips.

void SoNormalCache::generatePerStrip (const SbVec3f *constcoords, const unsigned intnumcoords, const int32_t *cind, const intnv, const SbBoolccw)¶

Generates one normal per triangle strips (avarages all triangle normals).

void SoNormalCache::generatePerVertexQuad (const SbVec3f *constcoords, const unsigned intnumcoords, const intvPerRow, const intvPerColumn, const SbBoolccw)¶

Generates PER_VERTEX normals for quad data.

void SoNormalCache::generatePerFaceQuad (const SbVec3f *constcoords, const unsigned intnumcoords, const intvPerRow, const intvPerColumn, const SbBoolccw)¶

Generates per face normals for quad data.

void SoNormalCache::generatePerRowQuad (const SbVec3f *constcoords, const unsigned intnumcoords, const intvPerRow, const intvPerColumn, const SbBoolccw)¶

Generates per row normals for quad data.

Author¶

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