ilyakooo0/metal-metaballs
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Removed a few more repeated calculations.

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vinivendra 2016-02-12 13:49:23 -05:00
parent 67fc9a0116
commit 8de54d9d65
1 changed files with 5 additions and 7 deletions
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12
PixelImage/shaders.metal
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@ -25,23 +25,21 @@ kernel void drawMetaballs(texture2d<float, access::write> outTexture[[texture(0)
}
for (i = 1, x = 0; i < metaballArraySize; i += 2, x += 1) {
float value1 = 2048 / (metaballDistances[x] + 1);
float2 direction1 = metaballDirections[x];
for (j = i + 2, y = x + 1; j < metaballArraySize; j += 2, y += 1) {
float value1 = 2048 / (metaballDistances[x] + 1);
float value2 = 2048 / (metaballDistances[y] + 1);
float2 direction2 = metaballDirections[y];
float v = value1 + value2;
float weightedValue = 0.5 * v;
char edgeIndex = y * numberOfMetaballs + x;
float edgeWeight = edgesBuffer[edgeIndex];
float2 direction1 = metaballDirections[x];
float2 direction2 = metaballDirections[y];
float cosine = dot(direction1, direction2);
float link = pow(((1 - cosine) * 0.5), 100);
float weightedLink = 0.6 * link * edgeWeight;
sum += step(0.5, weightedValue + weightedLink);