polyvox/include/PolyVox/AmbientOcclusionCalculator.h

84 lines
3.0 KiB
C++

/*******************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2015 David Williams and Matthew Williams
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*******************************************************************************/
#ifndef __AmbientOcclusionCalculator_H__
#define __AmbientOcclusionCalculator_H__
#include "Impl/RandomUnitVectors.h"
#include "Impl/RandomVectors.h"
#include "Array.h"
#include "Region.h"
#include "Raycast.h"
//These two should not be here!
#include "Material.h"
#include "PagedVolume.h"
#include <algorithm>
namespace PolyVox
{
/**
* \file
*
* Ambient occlusion
*/
template<typename VolumeType, typename IsVoxelTransparentCallback>
class AmbientOcclusionCalculatorRaycastCallback
{
public:
AmbientOcclusionCalculatorRaycastCallback(IsVoxelTransparentCallback isVoxelTransparentCallback) : mIsVoxelTransparentCallback(isVoxelTransparentCallback)
{
}
bool operator()(const typename VolumeType::Sampler& sampler)
{
auto sample = sampler.getVoxel();
bool func = mIsVoxelTransparentCallback(sample);
return func;
}
IsVoxelTransparentCallback mIsVoxelTransparentCallback;
};
// NOTE: The callback needs to be a functor not a function. I haven't been
// able to work the required template magic to get functions working as well.
//
// Matt: If you make the function take a "IsVoxelTransparentCallback&&" then
// it will forward it on. Works for functors, functions and lambdas.
// This will be 'perfect forwarding' using 'universal references'
// This will require C++11 rvalue references which is why I haven't made the
// change yet.
/// Calculate the ambient occlusion for the volume
template<typename VolumeType, typename IsVoxelTransparentCallback>
void calculateAmbientOcclusion(VolumeType* volInput, Array<3, uint8_t>* arrayResult, const Region& region, float fRayLength, uint8_t uNoOfSamplesPerOutputElement, IsVoxelTransparentCallback isVoxelTransparentCallback);
}
#include "AmbientOcclusionCalculator.inl"
#endif //__AmbientOcclusionCalculator_H__