Ogre::VertexShadowMapHelper Class Reference

#include <OgreVertexShadowMapHelper.h>

Static Public Member Functions
static bool	findFirstAppearance (const VertexArrayObjectArray &vao, const VertexBufferPacked *vertexBuffer, size_t &outVaoIdx, size_t &outVertexBufferIdx)
	Finds the first occurence of 'vertexBuffer' pointer in vao, and returns its indexes so that vao[outVaoIdx].getVertexBuffers()[outVertexBufferIdx] is the found first occurrence.
static void	optimizeForShadowMapping (VaoManager *vaoManager, const VertexArrayObjectArray &inVao, VertexArrayObjectArray &outVao)
	Reads all the vertex & index buffer from all the LOD levels in inVao, optimizes the buffers for shadow mapping, and stores them as new Vaos in outVao.
static uint32	shrinkVertexBuffer (uint8 *dstData, const VertexElement2 *vertexElements[3], FastArray< uint32 > &vertexConversionLut, bool hasIndexBuffer, const uint8 *srcData[3], const size_t srcOffset[3], const size_t srcBytesPerVertex[3], uint32 numVertices)
	Copies the contents from srcData into dstData, but shrinking it by removing duplicated vertices.
static void	useSameVaos (VaoManager *vaoManager, const VertexArrayObjectArray &inVao, VertexArrayObjectArray &outVao)
	Copies all the pointers in inVao to outVao so they are identical without cloning any memory.

Member Function Documentation

findFirstAppearance()

static bool Ogre::VertexShadowMapHelper::findFirstAppearance ( const VertexArrayObjectArray &  vao, const VertexBufferPacked *  vertexBuffer, size_t &  outVaoIdx, size_t &  outVertexBufferIdx  )

static

Finds the first occurence of 'vertexBuffer' pointer in vao, and returns its indexes so that vao[outVaoIdx].getVertexBuffers()[outVertexBufferIdx] is the found first occurrence.

Parameters

vao	Vao to look inside.
vertexBuffer	Vertex Buffer to look for.
outVaoIdx	The index to vao[outVaoIdx]. Value is not set if not found.
outVertexBufferIdx	The index to vao[outVaoIdx].getVertexBuffers[outVertexBufferIdx]. Value is not set if not found.

Returns

True if found, false if not found.

optimizeForShadowMapping()

static void Ogre::VertexShadowMapHelper::optimizeForShadowMapping ( VaoManager *  vaoManager, const VertexArrayObjectArray &  inVao, VertexArrayObjectArray &  outVao  )

static

Reads all the vertex & index buffer from all the LOD levels in inVao, optimizes the buffers for shadow mapping, and stores them as new Vaos in outVao.

Remarks

If the buffers can't be optimized (i.e. it is invalid because an LOD level doesn't contain the VES_POSITION semantic), useSameVaos is used; which does not clone the Vaos.

Parameters

vaoManager	VaoManager. Required for buffer management.
inVao	Input Vao to clone and optimize.
outVao	Output vao to store the cloned, optimized version.

shrinkVertexBuffer()

static uint32 Ogre::VertexShadowMapHelper::shrinkVertexBuffer ( uint8 *  dstData, const VertexElement2 *  vertexElements[3], FastArray< uint32 > &  vertexConversionLut, bool  hasIndexBuffer, const uint8 *  srcData[3], const size_t  srcOffset[3], const size_t  srcBytesPerVertex[3], uint32  numVertices  )

static

Copies the contents from srcData into dstData, but shrinking it by removing duplicated vertices.

Duplicated vertices are not removed if there is not index buffer.

Parameters

dstData	[inout] Pointer to copy to. Must be numVertices * sum(vertexElements[i]) in size, although amount of written bytes may be lower if there were duplicate vertices.
vertexElements	[in] An array with the vertex elements that needs to be copied (i.e. VES_POSITION, VES_BLEND_INDICES & VES_BLEND_WEIGHTS)
vertexConversionLut	[out] Table that maps the old vertices to their new location (only useful when the vertex data was actually shrunk)
srcData	[in] Pointers where to source the data from.
srcOffset	[in] Location in srcData to get each vertex element.
srcBytesPerVertex	[in] The vertex size per vertex buffer.
numVertices	[in] The total amount of vertices.

Returns

The new vertex count. Will be <= numVertices

useSameVaos()

static void Ogre::VertexShadowMapHelper::useSameVaos ( VaoManager *  vaoManager, const VertexArrayObjectArray &  inVao, VertexArrayObjectArray &  outVao  )

static

Copies all the pointers in inVao to outVao so they are identical without cloning any memory.

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

• OgreVertexShadowMapHelper.h