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Moved gradient calculation outside of class.

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This commit is contained in:
David Williams 2015-05-25 21:16:29 +02:00
parent e4ef845045
commit 37db0bac52
2 changed files with 23 additions and 31 deletions
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31
include/PolyVox/MarchingCubesSurfaceExtractor.h
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@ -156,37 +156,6 @@ namespace PolyVox
MarchingCubesSurfaceExtractor();
void execute(VolumeType* volData, Region region, MeshType* result, ControllerType controller);
private:
////////////////////////////////////////////////////////////////////////////////
// NOTE: These two functions are in the .h file rather than the .inl due to an apparent bug in VC2010.
//See http://stackoverflow.com/questions/1484885/strange-vc-compile-error-c2244 for details.
////////////////////////////////////////////////////////////////////////////////
Vector3DFloat computeCentralDifferenceGradient(const typename VolumeType::Sampler& volIter, ControllerType& controller)
{
//FIXME - Should actually use DensityType here, both in principle and because the maths may be
//faster (and to reduce casts). So it would be good to add a way to get DensityType from a voxel.
//But watch out for when the DensityType is unsigned and the difference could be negative.
float voxel1nx = static_cast<float>(controller.convertToDensity(volIter.peekVoxel1nx0py0pz()));
float voxel1px = static_cast<float>(controller.convertToDensity(volIter.peekVoxel1px0py0pz()));
float voxel1ny = static_cast<float>(controller.convertToDensity(volIter.peekVoxel0px1ny0pz()));
float voxel1py = static_cast<float>(controller.convertToDensity(volIter.peekVoxel0px1py0pz()));
float voxel1nz = static_cast<float>(controller.convertToDensity(volIter.peekVoxel0px0py1nz()));
float voxel1pz = static_cast<float>(controller.convertToDensity(volIter.peekVoxel0px0py1pz()));
return Vector3DFloat
(
voxel1nx - voxel1px,
voxel1ny - voxel1py,
voxel1nz - voxel1pz
);
}
////////////////////////////////////////////////////////////////////////////////
// End of compiler bug workaroumd.
////////////////////////////////////////////////////////////////////////////////
};
// This version of the function performs the extraction into a user-provided mesh rather than allocating a mesh automatically.

23
include/PolyVox/MarchingCubesSurfaceExtractor.inl
View File

@ -25,6 +25,29 @@ freely, subject to the following restrictions:
namespace PolyVox
{
template< typename Sampler, typename ControllerType>
Vector3DFloat computeCentralDifferenceGradient(const Sampler& volIter, ControllerType& controller)
{
//FIXME - Should actually use DensityType here, both in principle and because the maths may be
//faster (and to reduce casts). So it would be good to add a way to get DensityType from a voxel.
//But watch out for when the DensityType is unsigned and the difference could be negative.
float voxel1nx = static_cast<float>(controller.convertToDensity(volIter.peekVoxel1nx0py0pz()));
float voxel1px = static_cast<float>(controller.convertToDensity(volIter.peekVoxel1px0py0pz()));
float voxel1ny = static_cast<float>(controller.convertToDensity(volIter.peekVoxel0px1ny0pz()));
float voxel1py = static_cast<float>(controller.convertToDensity(volIter.peekVoxel0px1py0pz()));
float voxel1nz = static_cast<float>(controller.convertToDensity(volIter.peekVoxel0px0py1nz()));
float voxel1pz = static_cast<float>(controller.convertToDensity(volIter.peekVoxel0px0py1pz()));
return Vector3DFloat
(
voxel1nx - voxel1px,
voxel1ny - voxel1py,
voxel1nz - voxel1pz
);
}
template<typename VolumeType, typename MeshType, typename ControllerType>
MarchingCubesSurfaceExtractor<VolumeType, MeshType, ControllerType>::MarchingCubesSurfaceExtractor()
{