Utility class for provides optimised functions. More...

#include <OgreOptimisedUtil.h>

Public Member Functions
	OptimisedUtil ()

virtual	~OptimisedUtil ()

virtual void	calculateFaceNormals (const float positions, const v1::EdgeData::Triangle triangles, Vector4 *faceNormals, size_t numTriangles)=0
	Calculate the face normals for the triangles based on position information. More...

virtual void	calculateLightFacing (const Vector4 &lightPos, const Vector4 faceNormals, char lightFacings, size_t numFaces)=0
	Calculate the light facing state of the triangle's face normals. More...

virtual void	concatenateAffineMatrices (const Matrix4 &baseMatrix, const Matrix4 srcMatrices, Matrix4 dstMatrices, size_t numMatrices)=0
	Concatenate an affine matrix to an array of affine matrices. More...

virtual void	extrudeVertices (const Vector4 &lightPos, Real extrudeDist, const float srcPositions, float destPositions, size_t numVertices)=0
	Extruding vertices by a fixed distance based on light position. More...

virtual void	softwareVertexMorph (Real t, const float srcPos1, const float srcPos2, float *dstPos, size_t pos1VSize, size_t pos2VSize, size_t dstVSize, size_t numVertices, bool morphNormals)=0
	Performs a software vertex morph, of the kind used for morph animation although it can be used for other purposes. More...

virtual void	softwareVertexSkinning (const float srcPosPtr, float destPosPtr, const float srcNormPtr, float destNormPtr, const float blendWeightPtr, const unsigned char blendIndexPtr, const Matrix4 const blendMatrices, size_t srcPosStride, size_t destPosStride, size_t srcNormStride, size_t destNormStride, size_t blendWeightStride, size_t blendIndexStride, size_t numWeightsPerVertex, size_t numVertices)=0
	Performs software vertex skinning. More...

Static Public Member Functions
static OptimisedUtil *	getImplementation ()
	Gets the implementation of this class. More...

Detailed Description

Utility class for provides optimised functions.

Note: This class are supposed used by internal engine only.

Constructor & Destructor Documentation

◆ OptimisedUtil()

Ogre::OptimisedUtil::OptimisedUtil ( )

inline

◆ ~OptimisedUtil()

virtual Ogre::OptimisedUtil::~OptimisedUtil ( )

inlinevirtual

Member Function Documentation

◆ calculateFaceNormals()

virtual void Ogre::OptimisedUtil::calculateFaceNormals	(	const float *	positions,
		const v1::EdgeData::Triangle *	triangles,
		Vector4 *	faceNormals,
		size_t	numTriangles
	)

pure virtual

Calculate the face normals for the triangles based on position information.

Parameters

positions	Pointer to position information, which packed in (x, y, z) format, indexing by vertex index in the triangle. No alignment requests.
triangles	The triangles need to calculate face normal, the vertex positions is indexed by vertex index to position information.
faceNormals	The array of Vector4 used to store triangles face normal, Must be aligned to SIMD alignment.
numTriangles	Number of triangles to calculate face normal.

◆ calculateLightFacing()

virtual void Ogre::OptimisedUtil::calculateLightFacing	(	const Vector4 &	lightPos,
		const Vector4 *	faceNormals,
		char *	lightFacings,
		size_t	numFaces
	)

pure virtual

Calculate the light facing state of the triangle's face normals.

Remarks: This is normally the first stage of calculating a silhouette, i.e. establishing which tris are facing the light and which are facing away.

Parameters

lightPos	4D position of the light in object space, note that for directional lights (which have no position), the w component is 0 and the x/y/z position are the direction.
faceNormals	An array of face normals for the triangles, the face normal are unit vector orthogonal to the triangles, plus distance from origin. This array must be aligned to SIMD alignment.
lightFacings	An array of flags for store light facing state results, the result flag is true if corresponding face normal facing the light, false otherwise. This array no alignment requires.
numFaces	Number of face normals to calculate.

◆ concatenateAffineMatrices()

virtual void Ogre::OptimisedUtil::concatenateAffineMatrices	(	const Matrix4 &	baseMatrix,
		const Matrix4 *	srcMatrices,
		Matrix4 *	dstMatrices,
		size_t	numMatrices
	)

pure virtual

Concatenate an affine matrix to an array of affine matrices.

Note: An affine matrix is a 4x4 matrix with row 3 equal to (0, 0, 0, 1), e.g. no projective coefficients.

Parameters

baseMatrix	The matrix used as first operand.
srcMatrices	An array of matrix used as second operand.
dstMatrices	An array of matrix to store matrix concatenate results.
numMatrices	Number of matrices in the array.

◆ extrudeVertices()

virtual void Ogre::OptimisedUtil::extrudeVertices	(	const Vector4 &	lightPos,
		Real	extrudeDist,
		const float *	srcPositions,
		float *	destPositions,
		size_t	numVertices
	)

pure virtual

Extruding vertices by a fixed distance based on light position.

Parameters

lightPos	4D light position, when w=0.0f this represents a directional light, otherwise, w must be equal to 1.0f, which represents a point light.
extrudeDist	The distance to extrude.
srcPositions	Pointer to source vertex's position buffer, which the position is a 3D vector packed in xyz format. No SIMD alignment requirement but loss performance for unaligned data.
destPositions	Pointer to destination vertex's position buffer, which the position is a 3D vector packed in xyz format. No SIMD alignment requirement but loss performance for unaligned data.
numVertices	Number of vertices need to extruding, which agree with source and destination buffers.

◆ getImplementation()

static OptimisedUtil* Ogre::OptimisedUtil::getImplementation ( )

inlinestatic

Gets the implementation of this class.

Note: Don't cache the pointer returned by this function, it'll change due run-time environment detection to pick up the best implementation.

◆ softwareVertexMorph()

virtual void Ogre::OptimisedUtil::softwareVertexMorph	(	Real	t,
		const float *	srcPos1,
		const float *	srcPos2,
		float *	dstPos,
		size_t	pos1VSize,
		size_t	pos2VSize,
		size_t	dstVSize,
		size_t	numVertices,
		bool	morphNormals
	)

pure virtual

Performs a software vertex morph, of the kind used for morph animation although it can be used for other purposes.

Remarks: This function will linearly interpolate positions between two source buffers, into a third buffer.

Parameters

t	Parametric distance between the start and end positions
srcPos1	Pointer to buffer for the start positions
srcPos2	Pointer to buffer for the end positions
dstPos	Pointer to buffer for the destination positions
pos1VSize,pos2VSize,dstVSize	Vertex sizes in bytes of each of the 3 buffers referenced
numVertices	Number of vertices to morph, which agree with the number in start, end and destination buffer. Bear in mind three floating-point values per vertex

◆ softwareVertexSkinning()

virtual void Ogre::OptimisedUtil::softwareVertexSkinning	(	const float *	srcPosPtr,
		float *	destPosPtr,
		const float *	srcNormPtr,
		float *	destNormPtr,
		const float *	blendWeightPtr,
		const unsigned char *	blendIndexPtr,
		const Matrix4 const	blendMatrices,
		size_t	srcPosStride,
		size_t	destPosStride,
		size_t	srcNormStride,
		size_t	destNormStride,
		size_t	blendWeightStride,
		size_t	blendIndexStride,
		size_t	numWeightsPerVertex,
		size_t	numVertices
	)

pure virtual

Performs software vertex skinning.

Parameters

srcPosPtr	Pointer to source position buffer.
destPosPtr	Pointer to destination position buffer.
srcNormPtr	Pointer to source normal buffer, if NULL, means blend position only.
destNormPtr	Pointer to destination normal buffer, it's ignored if srcNormPtr is NULL.
blendWeightPtr	Pointer to blend weight buffer.
blendIndexPtr	Pointer to blend index buffer.
blendMatrices	An array of pointer of blend matrix, the matrix must be aligned to SIMD alignment, but not necessary for the array itself.
srcPosStride	The stride of source position in bytes.
destPosStride	The stride of destination position in bytes.
srcNormStride	The stride of source normal in bytes, it's ignored if srcNormPtr is NULL.
destNormStride	The stride of destination normal in bytes, it's ignored if srcNormPtr is NULL.
blendWeightStride	The stride of blend weight buffer in bytes.
blendIndexStride	The stride of blend index buffer in bytes.
numWeightsPerVertex	Number of blend weights per-vertex, as well as for blend indices.
numVertices	Number of vertices to blend.

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

OgreOptimisedUtil.h

Public Member Functions

Static Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ OptimisedUtil()

◆ ~OptimisedUtil()

Member Function Documentation

◆ calculateFaceNormals()

◆ calculateLightFacing()

◆ concatenateAffineMatrices()

◆ extrudeVertices()

◆ getImplementation()

◆ softwareVertexMorph()

◆ softwareVertexSkinning()