40 lines
734 B
HLSL
40 lines
734 B
HLSL
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#ifndef FLUIDKERNELS_INCLUDE
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#define FLUIDKERNELS_INCLUDE
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#include "SolverParameters.cginc"
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float Poly6(float r, float h)
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{
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float h2 = h * h;
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float h4 = h2 * h2;
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float h8 = h4 * h4;
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float rl = min(r, h);
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float hr = h2 - rl * rl;
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if (mode)
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return 4.0f / PI / h8 * hr * hr * hr;
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else
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return 315.0f / (64.0 * PI) / (h8 * h) * hr * hr * hr;
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}
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float Spiky(float r, float h)
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{
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float h2 = h * h;
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float h4 = h2 * h2;
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float rl = min(r, h);
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float hr = h - rl;
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if (mode)
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return -30.0f / PI / (h4 * h) * hr * hr;
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else
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return -45.0f / PI / (h4 * h2) * hr * hr;
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}
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float Cohesion(float r, float h)
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{
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return cos(min(r, h) * 3 * PI / (2 * h));
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}
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#endif
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