ShFunc.hpp

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// Sh: A GPU metaprogramming language.
//
// Copyright (c) 2003 University of Waterloo Computer Graphics Laboratory
// Project administrator: Michael D. McCool
// Authors: Zheng Qin, Stefanus Du Toit, Kevin Moule, Tiberiu S. Popa,
//          Bryan Chan, Michael D. McCool
// 
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
// 
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 
// 1. The origin of this software must not be misrepresented; you must
// not claim that you wrote the original software. If you use this
// software in a product, an acknowledgment in the product documentation
// would be appreciated but is not required.
// 
// 2. Altered source versions must be plainly marked as such, and must
// not be misrepresented as being the original software.
// 
// 3. This notice may not be removed or altered from any source
// distribution.
#ifndef SHUTIL_FUNC_HPP 
#define SHUTIL_FUNC_HPP 

#include "ShVariable.hpp"
#include "ShAttrib.hpp"

#ifndef WIN32
namespace ShUtil {

using namespace SH;

//TODO extend to vector versions

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

template<int N, typename T>
ShGeneric<1, T> distance(const ShGeneric<N, T>& a, const ShGeneric<N, T>& b); 

template<int N, typename T>
ShGeneric<1, T> lOneDistance(const ShGeneric<N, T>& a, const ShGeneric<N, T>& b); 

template<int N, typename T>
ShGeneric<1, T> lInfDistance(const ShGeneric<N, T>& a, const ShGeneric<N, T>& b); 

// TODO: may not work as intended on 24-bit floats
// since there may not be enough precision 
template<int N, typename T>
ShGeneric<N, T> hashlcg(const ShGeneric<N, T>& p); 

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


template<int N, ShBindingType Binding, typename T>
ShAttrib<N, Binding, T> evenOddSort(const ShAttrib<N, Binding, T>& v);

template<int S, int N, ShBindingType Binding, typename T>
void groupEvenOddSort(ShAttrib<N, Binding, T> v[]);

//template<int S, int N, ShBindingType Binding, typename T>
//void groupBitonicSort(ShAttrib<N, Binding, T> v[]);

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); 

}
#endif

#include "ShFuncImpl.hpp"

#endif // SHUTIL_FUNC_HPP 

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