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Vasily Petrov 2026-06-18 01:18:29 +03:00
commit 2fe6ca2f65
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gamedata/shaders/d3d11/fluid_project.ps.hlsl Normal file
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#include "fluid_common.hlsli"
// Pixel
float3 main(p_fluidsim input) : SV_Target
{
if (IsBoundaryCell(input.texcoords.xyz))
{
return GetObstVelocity(input.texcoords.xyz).xyz;
}
float pCenter = Texture_pressure.SampleLevel(samPointClamp, input.texcoords, 0).x;
float pL = Texture_pressure.SampleLevel(samPointClamp, LEFTCELL, 0).x;
float pR = Texture_pressure.SampleLevel(samPointClamp, RIGHTCELL, 0).x;
float pB = Texture_pressure.SampleLevel(samPointClamp, BOTTOMCELL, 0).x;
float pT = Texture_pressure.SampleLevel(samPointClamp, TOPCELL, 0).x;
float pD = Texture_pressure.SampleLevel(samPointClamp, DOWNCELL, 0).x;
float pU = Texture_pressure.SampleLevel(samPointClamp, UPCELL, 0).x;
float3 obstV = float3(0, 0, 0);
float3 vMask = float3(1, 1, 1);
float3 vLeft = GetObstVelocity(LEFTCELL).xyz;
float3 vRight = GetObstVelocity(RIGHTCELL).xyz;
float3 vBottom = GetObstVelocity(BOTTOMCELL).xyz;
float3 vTop = GetObstVelocity(TOPCELL).xyz;
float3 vDown = GetObstVelocity(DOWNCELL).xyz;
float3 vUp = GetObstVelocity(UPCELL).xyz;
float3 v;
if (IsBoundaryCell(LEFTCELL))
{
pL = pCenter;
obstV.x = vLeft.x;
vMask.x = 0;
}
if (IsBoundaryCell(RIGHTCELL))
{
pR = pCenter;
obstV.x = vRight.x;
vMask.x = 0;
}
if (IsBoundaryCell(BOTTOMCELL))
{
pB = pCenter;
obstV.y = vBottom.y;
vMask.y = 0;
}
if (IsBoundaryCell(TOPCELL))
{
pT = pCenter;
obstV.y = vTop.y;
vMask.y = 0;
}
if (IsBoundaryCell(DOWNCELL))
{
pD = pCenter;
obstV.z = vDown.z;
vMask.z = 0;
}
if (IsBoundaryCell(UPCELL))
{
pU = pCenter;
obstV.z = vUp.z;
vMask.z = 0;
}
v = (Texture_velocity1.SampleLevel(samPointClamp, input.texcoords, 0).xyz -
(0.5 * modulate * float3(pR - pL, pT - pB, pU - pD)));
return vMask * v + obstV;
}