simple gradient

simple_gradient.cpp

#include "Debug"

void main() {
	// Load a reference image
	ref<Debug> debug;
	std::vector<float4> _ref = debug->getRefimg(film);

	// Calculate
	float4* _refDxErr = new float4[xSize * ySize];
	float4* _refDyErr = new float4[xSize * ySize];

	for (int i = 0; i < xSize * ySize; ++i) {
		int x = i % xSize;
	    	int y = i / xSize;

		_refDx[i].x = (x != xSize - 1) ? _ref[i + 1].x - _ref[i].x : 0.f;
		_refDx[i].y = (x != xSize - 1) ? _ref[i + 1].y - _ref[i].y : 0.f;
		_refDx[i].z = (x != xSize - 1) ? _ref[i + 1].z - _ref[i].z : 0.f;

		_refDy[i].x = (y != ySize - 1) ? _ref[i + xSize].x - _ref[i].x : 0.f;
		_refDy[i].y = (y != ySize - 1) ? _ref[i + xSize].y - _ref[i].y : 0.f;
		_refDy[i].z = (y != ySize - 1) ? _ref[i + xSize].z - _ref[i].z : 0.f;
	}
}