51 lines
1.2 KiB
HLSL
51 lines
1.2 KiB
HLSL
#include "fluid_common.hlsli"
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cbuffer BoxBounds
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{
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// float3 boxLBDcorner;
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// float3 boxRTUcorner;
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float4 boxLBDcorner;
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float4 boxRTUcorner;
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}
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struct PSDrawBoxOut
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{
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float4 obstacle : SV_TARGET0;
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float4 velocity : SV_TARGET1;
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};
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bool PointIsInsideBox(float3 p, float3 LBUcorner, float3 RTDcorner)
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{
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return ((p.x > LBUcorner.x) && (p.x < RTDcorner.x) &&
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(p.y > LBUcorner.y) && (p.y < RTDcorner.y) &&
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(p.z > LBUcorner.z) && (p.z < RTDcorner.z));
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}
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// Pixel
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PSDrawBoxOut main(p_fluidsim input)
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{
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PSDrawBoxOut voxel;
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float3 innerboxLBDcorner = boxLBDcorner + 1;
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float3 innerboxRTUcorner = boxRTUcorner - 1;
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// cells completely inside box = 1.0
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if (PointIsInsideBox(input.cell0, innerboxLBDcorner, innerboxRTUcorner))
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{
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voxel.obstacle = 0.5;
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voxel.velocity = 0;
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return voxel;
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}
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// cells in box boundary = 0.5
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if (PointIsInsideBox(input.cell0, boxLBDcorner, boxRTUcorner))
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{
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voxel.obstacle = 1.0;
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// voxel.velocity = float4(obstVelocity.xyz,1);
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voxel.velocity = 0;
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return voxel;
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}
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// Kill texel to preserve other obstacles
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clip(-1);
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return (PSDrawBoxOut)0;
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}
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