Realistic Rendering and 3D Data Processing

This section describes the Intel® Integrated Performance Primitives (Intel® IPP) for realistic rendering and 3D data processing.

Table “Functions for Realistic Rendering” lists functions described in more detail later in this section:

Functions for Realistic Rendering
Function Base Name	Operation
Ray-Scene Intersection Engine
IntersectMO	Calculates parameters of intersection of rays with the scene triangles.
IntersectEyeSO	Calculates intersection of the primary ray with the geometry of scene.
IntersectAnySO	Performs occlusion tests for block of rays with the single origin.
IntersectMultipleSO	Calculates the parameters of intersection of rays with the specified number of scene triangles.
Ray-Casting Functions
CastEye	Calculates the vectors of direction for primary rays.
CastReflectionRay	Calculates the vectors of direction for secondary rays.
CastShadowSO	Calculates the vectors of direction for shadow rays.
Surface Properties Functions
SurfFlatNormal	Calculates the flat surface normals.
SurfSmoothNormal	Calculates the smooth surface normals.
HitPoint3DEpsSO	Calculates coordinates of the hit points for a block of rays from the single origin.
HitPoint3DEpsMO	Calculates coordinates of the hit points for a block of rays from the multiple origins.
Shader Support Functions
Dot	Calculates the dot product of two vectors.
DotChangeNorm	Calculates the dot product of two vectors and changes the sign of the surface normal.
Mul	Multiplies accumulator and source vectors.
AddMulMul	Multiplies two source vectors and adds product to the accumulator.
Divi	Divides two vectors.
DistAttenuationSO	Calculates the distance between source point and intersection points.
Acceleration Functions
TriangleAccelInit	Initializes the structure IpprTriangleAccel.
TriangleAccelGetSize	Calculates the size of the external buffer for the structure IpprTriangleAccel.
SetBoundBox	Calculates the coordinates of the axis aligned bounding box.
KDTreeBuildAlloc	Builds k-D tree for triangles.
KDTreeFree	Frees memory allocated for k-D tree.
Auxiliary Functions
TriangleNormal	Calculates the triangle normals.
Spherical Harmonic Transform Functions
SHGetSize	Calculates the size of the state structure for spherical harmonic transforms.
SHInit	Initializes the state structure for spherical harmonic transforms.
SH, SHBand	Computes the spherical harmonic functions.
SHTFwd	Computes the forward spherical harmonic transform.
SHTInv	Computes the inverse spherical harmonic transform.
3D Transforms Functions
ResizeGetBufSize	Calculates the size of the external work buffer.
Resize	Resizes the source volume.
WarpAffineGetBufSize	Calculates the size of the external buffer for the affine transform.
WarpAffine	Performs the general affine transform of the source volume.
Remap	Performs the look-up coordinate mapping of the elements of the source volume.
3D General Linear Filters
FilterGetBufSize	Calculates the size of the working buffer.
Filter	Filters a volume using a general cuboidal kernel.