19 lines
714 B
HLSL
19 lines
714 B
HLSL
#include "fluid_common.hlsli"
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// Pixel
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float3 main(p_fluidsim input) : SV_Target
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{
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float4 L = Texture_velocity1.SampleLevel(samPointClamp, LEFTCELL, 0);
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float4 R = Texture_velocity1.SampleLevel(samPointClamp, RIGHTCELL, 0);
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float4 B = Texture_velocity1.SampleLevel(samPointClamp, BOTTOMCELL, 0);
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float4 T = Texture_velocity1.SampleLevel(samPointClamp, TOPCELL, 0);
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float4 D = Texture_velocity1.SampleLevel(samPointClamp, DOWNCELL, 0);
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float4 U = Texture_velocity1.SampleLevel(samPointClamp, UPCELL, 0);
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float3 vorticity = 0.5 * float3(((T.z - B.z) - (U.y - D.y)),
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((U.x - D.x) - (R.z - L.z)),
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((R.y - L.y) - (T.x - B.x)));
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return vorticity;
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}
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