64 lines
1.6 KiB
Plaintext
64 lines
1.6 KiB
Plaintext
// DeformationCS.usf
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#include "/Engine/Public/Platform.ush"
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// 输入输出定义
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Texture2D<float4> InputTexture;
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RWTexture2D<float4> OutputTexture;
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// 参数缓冲区
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cbuffer Parameters
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{
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float3 ImpactPoint;
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float ImpactForce;
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float3 ImpactNormal;
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float DeformationRadius;
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float Plasticity;
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int3 TextureSize;
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int3 UpdateRegionMin;
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int3 UpdateRegionSize;
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};
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// 线程组大小
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#define THREADGROUP_SIZE_X 8
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#define THREADGROUP_SIZE_Y 8
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[numthreads(THREADGROUP_SIZE_X, THREADGROUP_SIZE_Y, 1)]
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void MainCS(
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uint3 GroupID : SV_GroupID,
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uint3 GroupThreadID : SV_GroupThreadID,
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uint3 DispatchThreadID : SV_DispatchThreadID
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)
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{
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// 计算全局像素坐标
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int2 PixelCoord = DispatchThreadID.xy + int2(UpdateRegionMin.xy);
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// 检查是否在有效区域内
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if (PixelCoord.x >= UpdateRegionMin.x + UpdateRegionSize.x ||
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PixelCoord.y >= UpdateRegionMin.y + UpdateRegionSize.y)
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{
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return;
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}
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// 从输入纹理读取位置
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float4 OriginalPos = InputTexture.Load(int3(PixelCoord, 0));
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// 计算到碰撞点的距离
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float dist = distance(OriginalPos.xyz, ImpactPoint);
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// 在变形半径内处理
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if (dist < DeformationRadius)
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{
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// 计算变形衰减 (高斯衰减)
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float falloff = exp(-(dist * dist) / (2.0 * DeformationRadius * DeformationRadius));
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// 计算变形量 (考虑法线方向)
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float3 deformation = ImpactNormal * ImpactForce * falloff * 0.01;
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// 应用塑性变形
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float3 newPos = OriginalPos.xyz + deformation * Plasticity;
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// 写入新位置
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OutputTexture[PixelCoord] = float4(newPos, OriginalPos.w);
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}
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else
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{
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// 保持原位置
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OutputTexture[PixelCoord] = OriginalPos;
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}
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} |