SoNormalCache Class Reference

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. More...

#include <Inventor/caches/SoNormalCache.h>

Inheritance diagram for SoNormalCache:

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)
Public Member Functions inherited from SoCache
	SoCache (SoState *const state)
void	ref (void)
void	unref (SoState *state=NULL)
void	addElement (const SoElement *const elem)
virtual void	addCacheDependency (const SoState *state, SoCache *cache)
virtual SbBool	isValid (const SoState *state) const
const SoElement *	getInvalidElement (const SoState *const state) const
void	invalidate (void)

Additional Inherited Members
Protected Member Functions inherited from SoCache
virtual void	destroy (SoState *state)
virtual	~SoCache ()

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 *const

state

)

Contructor with state being the current state.

SoNormalCache::~SoNormalCache ( )

virtual

Destructor

Member Function Documentation

void SoNormalCache::set	(	const int	num,
		const SbVec3f *const	normals
	)

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 *const	coords,
		const unsigned int	numcoords,
		const int32_t *	vindex,
		const int	numvi,
		const float	crease_angle,
		const SbVec3f *	facenormals = NULL,
		const int	numfacenormals = -1,
		const SbBool	ccw = TRUE,
		const SbBool	tristrip = 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 *const	coords,
		const unsigned int	numcoords,
		const int32_t *	cind,
		const int	nv,
		const SbBool	ccw
	)

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

void SoNormalCache::generatePerFaceStrip	(	const SbVec3f *const	coords,
		const unsigned int	numcoords,
		const int32_t *	cind,
		const int	nv,
		const SbBool	ccw
	)

Generates face normals for triangle strips.

void SoNormalCache::generatePerStrip	(	const SbVec3f *const	coords,
		const unsigned int	numcoords,
		const int32_t *	cind,
		const int	nv,
		const SbBool	ccw
	)

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

void SoNormalCache::generatePerVertexQuad	(	const SbVec3f *const	coords,
		const unsigned int	numcoords,
		const int	vPerRow,
		const int	vPerColumn,
		const SbBool	ccw
	)

Generates PER_VERTEX normals for quad data.

void SoNormalCache::generatePerFaceQuad	(	const SbVec3f *const	coords,
		const unsigned int	numcoords,
		const int	vPerRow,
		const int	vPerColumn,
		const SbBool	ccw
	)

Generates per face normals for quad data.

void SoNormalCache::generatePerRowQuad	(	const SbVec3f *const	coords,
		const unsigned int	numcoords,
		const int	vPerRow,
		const int	vPerColumn,
		const SbBool	ccw
	)

Generates per row normals for quad data.

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

• SoNormalCache.h
• SoNormalCache.cpp