ShUtil Namespace Reference

The main ShUtil namespace. More...

Classes
class	ShMesh
	ShMesh class stores a mesh using a half-edge data structure. More...
class	ShNoise
	A Perlin noise/turbulence generator. More...
Typedefs
typedef std::vector< Triple >	ShObjIndexedFace
typedef ShMeshType< ShObjVertex, ShObjFace, ShObjEdge >	ShObjMeshType
Functions
template<int N, typename T>
ShGeneric< N, T >	smoothstep (const ShGeneric< N, T > &a, const ShGeneric< N, T > &b, const ShGeneric< N, T > x)
	Cubic interpolated step between 0 and 1.
template<int N, typename T>
ShGeneric< N, T >	hashlcg (const ShGeneric< N, T > &p)
	Parallel linear congruential generator.
template<int N, typename T>
ShGeneric< N, T >	hashmrg (const ShGeneric< N, T > &p)
	MRG style pseudorandom vector generator.
template<typename T>
ShGeneric< 3, T >	changeBasis (const ShGeneric< 3, T > &b0, const ShGeneric< 3, T > &b1, const ShGeneric< 3, T > &b2, const ShGeneric< 3, T > &v)
	Given 3 orthonormal basis vectors b0, b1, b2, specified relative to a coordinate space C, this does a change of basis on a vector v in space C to the orthonormal basis.
template<int N, int M, typename T>
ShGeneric< N, T >	perlin (const ShGeneric< M, T > &p, bool useTexture=true)
template<int N, int M, int K, typename T1, typename T2>
ShGeneric< N, CT1T2 >	perlin (const ShGeneric< M, T1 > &p, const ShGeneric< K, T2 > &amp, bool useTexture=true)
template<int N, int M, typename T>
ShGeneric< N, T >	sperlin (const ShGeneric< M, T > &p, bool useTexture=true)
template<int N, int M, int K, typename T1, typename T2>
ShGeneric< N, CT1T2 >	sperlin (const ShGeneric< M, T1 > &p, const ShGeneric< K, T2 > &amp, bool useTexture=true)
template<int N, int M, typename T>
ShGeneric< N, T >	cellnoise (const ShGeneric< M, T > &p, bool useTexture=true)
template<int N, int M, int K, typename T1, typename T2>
ShGeneric< N, CT1T2 >	cellnoise (const ShGeneric< M, T1 > &p, const ShGeneric< K, T2 > &amp, bool useTexture=true)
template<int N, int M, typename T>
ShGeneric< N, T >	scellnoise (const ShGeneric< M, T > &p, bool useTexture=true)
template<int N, int M, int K, typename T1, typename T2>
ShGeneric< N, CT1T2 >	scellnoise (const ShGeneric< M, T1 > &p, const ShGeneric< K, T2 > &amp, bool useTexture=true)
template<int N, int M, typename T>
ShGeneric< N, T >	turbulence (const ShGeneric< M, T > &p, bool useTexture=true)
template<int N, int M, int K, typename T1, typename T2>
ShGeneric< N, CT1T2 >	turbulence (const ShGeneric< M, T1 > &p, const ShGeneric< K, T2 > &amp, bool useTexture=true)
template<int N, int M, typename T>
ShGeneric< N, T >	sturbulence (const ShGeneric< M, T > &p, bool useTexture=true)
	Turbulence functions sum several octaves of Perlin noise.
template<int N, int M, int K, typename T1, typename T2>
ShGeneric< N, CT1T2 >	sturbulence (const ShGeneric< M, T1 > &p, const ShGeneric< K, T2 > &amp, bool useTexture=true)
template<int M, typename T>
ShGeneric< M, T >	_psmootht (const ShGeneric< M, T > &t)
	SHNOISE_WITH_AMP (perlin)
	SHNOISE_WITH_AMP (sperlin)
	SHNOISE_WITH_AMP (cellnoise)
	SHNOISE_WITH_AMP (scellnoise)
	SHNOISE_WITH_AMP (turbulence)
	SHNOISE_WITH_AMP (sturbulence)
std::istream &	operator>> (std::istream &in, ShObjMesh &mesh)
template<typename P1, typename P2>
PropertyFactory< P1::NUM_PROPS+P2::NUM_PROPS, P1::DIM, typename P1::PropType > *	combine (const P1 *propFactory1, const P2 *propFactory2)
template<int K, int D, typename T>
ShGeneric< K, T >	worley (const ShGeneric< D, T > &p, bool useTexture=true)
	Worley texture generator.
template<int K, int L, int P, int D, typename T>
void	worley (ShGeneric< K, T > result[], const ShGeneric< D, T > &p, const GeneratorFactory< P, D, T > *genFactory, const PropertyFactory< L, D, T > *propFactory)
	Worley texture generator.
template<int K, int D, typename T>
ShProgram	shWorley (bool useTexture)
	Makes a shader that takes IN(1) ShTexCoord<D,T> texcoord; // texture lookup coordinates.
template<int K, int N, int P, int D, typename T>
ShProgram	shWorley (const GeneratorFactory< P, D, T > *genFactory, const PropertyFactory< N, D, T > *propFactory)
template<int N, int K, int P, typename T>
void	kSelect (const ShGeneric< P, T > vals[N], ShGeneric< K, T > result[N], float LARGE=1e10)
template<int K, int L, int P, int D, typename T>
ShProgram	shWorley (const GeneratorFactory< P, D, T > *genFactory, const PropertyFactory< L, D, T > *propFactory)

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Detailed Description

The main ShUtil namespace.

All the extra Sh utility functions and objects reside within this namespace.

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Function Documentation

template<int N, typename T> ShGeneric< N, T > ShUtil::hashlcg (  const ShGeneric< N, T > &  p  )

Parallel linear congruential generator. This does not work very well right now. Use hashmrg instead. See also: template<int N, typename T> ShGeneric<N, T> hashmrg(const ShGeneric<N, T>& p) Definition at line 58 of file ShFuncImpl.hpp. References SH::exp(), SH::frac(), SH::mad(), and SH::pow().

template<int N, typename T> ShGeneric< N, T > ShUtil::hashmrg (  const ShGeneric< N, T > &  p  )

MRG style pseudorandom vector generator. Generates a random vector using a multiple-recursive generator style. (LCG on steroids) Treat x,y,z,w as seeds a0, a1, a2, a3 and repeatedly apply an = b * (an-1, an-2, an-3, an-4), where b is a vector Take as output (an, an-1, an-2, an3) after suitable number of iterations. This appears to reduce correlation in the output components when input components are similar, but the behaviour needs to be studied further. See also: template<int N, typename T> ShGeneric<N, T> hashlcg(const ShGeneric<N, T>& p) Definition at line 88 of file ShFuncImpl.hpp. References SH::dot(), SH::exp(), SH::frac(), and SH::pow(). Referenced by ShUtil::ShNoise< M, T, P >::cellnoise(), and ShUtil::ShNoise< M, T, P >::perlin().

template<int K, int D, typename T> ShProgram ShUtil::shWorley (  bool  useTexture  )

Makes a shader that takes IN(1) ShTexCoord<D,T> texcoord; // texture lookup coordinates. TODO make Output a struct of some kind when Sh supports structs OUT(0) ShAttrib<K, T> result[N]; // properties of k-nearest neighbours Definition at line 274 of file ShWorleyImpl.hpp.

template<int N, typename T> ShGeneric< N, T > ShUtil::smoothstep (  const ShGeneric< N, T > &  a, const ShGeneric< N, T > &  b, const ShGeneric< N, T >  x )

Cubic interpolated step between 0 and 1. Returns 0 if x < a, 1 if x > b, cubic interpolation between 0 and 1 otherwise Definition at line 40 of file ShFuncImpl.hpp. References SH::clamp(), and SH::mad().

template<int K, int L, int P, int D, typename T> void ShUtil::worley (  ShGeneric< K, T >  result[], const ShGeneric< D, T > &  p, const GeneratorFactory< P, D, T > *  genFactory, const PropertyFactory< L, D, T > *  propFactory )

Worley texture generator. This uses a GeneratorFactory and PropertyFactory of your choice. Definition at line 235 of file ShWorleyImpl.hpp.

template<int K, int D, typename T> ShGeneric< K, T > ShUtil::worley (  const ShGeneric< D, T > &  p, bool  useTexture = true )

Worley texture generator. This uses the DefaultGeneratorFactory and DistSqPropFactory TODO allow arbitrary distance function Definition at line 261 of file ShWorleyImpl.hpp.

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