调试shader
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// DeformationCS.usf
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#include "/Engine/Public/Platform.ush"
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// -----------------------------------------------------------------------------
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// 1. 输入输出定义
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// -----------------------------------------------------------------------------
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// 必须与 C++ 的 SHADER_PARAMETER_RDG_TEXTURE_SRV 匹配
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Texture2D<float4> InputTexture;
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// 必须与 C++ 的 SHADER_PARAMETER_RDG_TEXTURE_UAV 匹配
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RWTexture2D<float4> OutputTexture;
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// -----------------------------------------------------------------------------
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// 2. 参数缓冲区 (必须与 C++ FParameters 结构体严格匹配)
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// -----------------------------------------------------------------------------
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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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// 修正后的参数：对应 C++ 的 FIntVector4 UpdateRegionParam
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// 分量顺序: (Min.X, Min.Y, Max.X, Max.Y)
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int4 UpdateRegionParam;
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};
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// -----------------------------------------------------------------------------
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// 3. 线程组大小和入口点
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// -----------------------------------------------------------------------------
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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 MainCompute( // 注意: 建议使用 MainCompute，如果 C++ 注册的是 MainCompute
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uint3 GroupID : SV_GroupID,
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uint3 GroupThreadID : SV_GroupThreadID,
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uint3 DispatchThreadID : SV_DispatchThreadID // 全局线程 ID
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)
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{
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// -------------------------------------------------------------------------
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// 4. 坐标计算与边界检查
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// -------------------------------------------------------------------------
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// DispatchThreadID 从 0 开始，代表在调度区域内的偏移量。
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// 我们将其加上 UpdateRegionParam.xy (Min.X, Min.Y) 得到全局像素坐标。
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int2 PixelCoord = DispatchThreadID.xy + int2(UpdateRegionParam.x, UpdateRegionParam.y);
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// 边界检查：检查是否超出 UpdateRegionParam.zw (Max.X, Max.Y)
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if (PixelCoord.x < UpdateRegionParam.x || PixelCoord.x >= UpdateRegionParam.z ||
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PixelCoord.y < UpdateRegionParam.y || PixelCoord.y >= UpdateRegionParam.w)
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{
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// 虽然我们调度时已经只调度了需要的区域，但为了安全起见，保留检查。
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// 理论上，如果 C++ 端调度正确，这个检查应该很少触发。
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return;
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}
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// -------------------------------------------------------------------------
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// 5. 变形计算逻辑 (与之前相同)
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// -------------------------------------------------------------------------
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// 从输入纹理读取位置
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// Load 需要 int3，第三个分量 (MipLevel) 设为 0
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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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}
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@@ -1,64 +0,0 @@
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// 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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}
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@@ -8,6 +8,8 @@ public class BladeSmith : ModuleRules
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{
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PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
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// 如果你的模块类型是 Runtime 或 Gameplay 相关的，则添加这行：
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// bFasterWithoutUnity = false; // 确保非 Unity 构建也能正确加载
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PublicDependencyModuleNames.AddRange(new string[] {
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"Core",
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"CoreUObject",
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@@ -16,11 +18,13 @@ public class BladeSmith : ModuleRules
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"EnhancedInput",
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"RenderCore",
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"RHI",
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"RenderCore",
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"Renderer",
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"PhysicsCore",
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"AudioExtensions",
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"AudioMixer",
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"AudioPlatformConfiguration"
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});
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}
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}
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@@ -12,41 +12,7 @@
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FThreadSafeDeformationParams GDeformationParams;
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// 实现Compute Shader
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IMPLEMENT_GLOBAL_SHADER(FDeformationCS, "/Shaders/Private/DeformationCS.usf", "MainCS", SF_Compute);
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// 分派函数实现
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void FDeformationCS::Dispatch(
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FRHICommandListImmediate& RHICmdList,
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const FDeformationCSDispatchParams& Params)
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{
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// 创建参数结构
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FParameters Parameters;
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Parameters.ImpactPoint = FVector3f(Params.ImpactPoint);
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Parameters.ImpactNormal = FVector3f(Params.ImpactNormal);
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Parameters.ImpactForce = Params.ImpactForce;
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Parameters.DeformationRadius = Params.DeformationRadius;
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Parameters.Plasticity = Params.Plasticity;
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Parameters.InputTexture = Params.InputTexture;
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Parameters.OutputTexture = Params.OutputTexture;
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Parameters.TextureSize = Params.TextureSize;
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Parameters.UpdateRegionMin = FIntVector(Params.UpdateRegion.Min.X, Params.UpdateRegion.Min.Y, 0);
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Parameters.UpdateRegionSize = FIntVector(Params.UpdateRegion.Width(), Params.UpdateRegion.Height(), 1);
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// 计算线程组数量
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const int32 ThreadGroupSizeX = 8;
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const int32 ThreadGroupSizeY = 8;
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const int32 ThreadGroupSizeZ = 1;
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const int32 GroupCountX = FMath::DivideAndRoundUp(Params.UpdateRegion.Width(), ThreadGroupSizeX);
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const int32 GroupCountY = FMath::DivideAndRoundUp(Params.UpdateRegion.Height(), ThreadGroupSizeY);
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const int32 GroupCountZ = 1;
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// 分派Compute Shader
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TShaderMapRef<FDeformationCS> ComputeShader(GetGlobalShaderMap(GMaxRHIFeatureLevel));
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SetComputePipelineState(RHICmdList, ComputeShader.GetComputeShader());
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SetShaderParameters(RHICmdList, ComputeShader, ComputeShader.GetComputeShader(), Parameters);
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RHICmdList.DispatchComputeShader(GroupCountX, GroupCountY, GroupCountZ);
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}
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IMPLEMENT_GLOBAL_SHADER(FDeformComputeShader, "/Engine/Private/MiceCola/DeformationCS.usf", "MainCompute", SF_Compute);
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// 线程安全参数管理
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void FThreadSafeDeformationParams::AddParams(const FDeformationCSDispatchParams& NewParams)
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@@ -1,13 +1,8 @@
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#pragma once
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#include "GlobalShader.h"
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// DeformComputeShader.h
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// DeformationCS.h
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#pragma once
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#include "CoreMinimal.h"
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#include "RHI.h"
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#include "RHIResources.h"
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#include "GlobalShader.h"
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#include "ShaderParameterStruct.h"
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#include "RenderGraphUtils.h" // 必须包含
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// Compute Shader参数结构体
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struct FDeformationCSDispatchParams
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@@ -52,32 +47,51 @@ extern FThreadSafeDeformationParams GDeformationParams;
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// DeformationCS.h (续)
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// Compute Shader类
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class FDeformationCS : public FGlobalShader
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class FDeformComputeShader : public FGlobalShader
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{
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DECLARE_GLOBAL_SHADER(FDeformationCS);
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SHADER_USE_PARAMETER_STRUCT(FDeformationCS, FGlobalShader);
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DECLARE_GLOBAL_SHADER(FDeformComputeShader);
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SHADER_USE_PARAMETER_STRUCT(FDeformComputeShader, FGlobalShader);
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BEGIN_SHADER_PARAMETER_STRUCT(FParameters, )
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// 碰撞参数
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SHADER_PARAMETER(FVector3f, ImpactPoint)
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SHADER_PARAMETER(FVector3f, ImpactNormal)
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SHADER_PARAMETER(float, ImpactForce)
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SHADER_PARAMETER(FVector3f, ImpactNormal)
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SHADER_PARAMETER(float, DeformationRadius)
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SHADER_PARAMETER(float, Plasticity)
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// 纹理参数
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SHADER_PARAMETER_TEXTURE(Texture2D, InputTexture)
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SHADER_PARAMETER_UAV(RWTexture2D<float4>, OutputTexture)
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SHADER_PARAMETER_RDG_TEXTURE_SRV(Texture2D, InputTexture)
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SHADER_PARAMETER_RDG_TEXTURE_UAV(RWTexture2D<float4>, OutputTexture)
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// 更新区域
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SHADER_PARAMETER(FIntVector, TextureSize)
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SHADER_PARAMETER(FIntVector, UpdateRegionMin)
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SHADER_PARAMETER(FIntVector, UpdateRegionSize)
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SHADER_PARAMETER(FIntVector4, UpdateRegionParam)
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END_SHADER_PARAMETER_STRUCT()
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static bool ShouldCompilePermutation(const FGlobalShaderPermutationParameters& Parameters)
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{
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return IsFeatureLevelSupported(Parameters.Platform, ERHIFeatureLevel::SM5);
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return GetMaxSupportedFeatureLevel(Parameters.Platform) >= ERHIFeatureLevel::SM5;
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}
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// 2. ✨ 修复 Precache 错误的关键：实现 ShouldPrecachePermutation
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// 我们告诉引擎：在开发模式下，请始终预缓存这个着色器。
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static EShaderPermutationPrecacheRequest ShouldPrecachePermutation(const FGlobalShaderPermutationParameters& Parameters)
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{
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// 如果你的着色器没有使用任何模板或标志，只需返回 E_DEVELOPMENT 或 E_ALL。
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return EShaderPermutationPrecacheRequest::Precached;
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}
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static bool ShouldCache(EShaderPlatform Platform)
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{
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return true;
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}
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// (假设你的 .usf 文件中线程组大小为 8x8x1)
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static FIntVector GetGroupSize()
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{
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return FIntVector(8, 8, 1);
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}
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static void ModifyCompilationEnvironment(const FGlobalShaderPermutationParameters& Parameters, FShaderCompilerEnvironment& OutEnvironment)
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@@ -87,8 +101,4 @@ class FDeformationCS : public FGlobalShader
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OutEnvironment.SetDefine(TEXT("THREADGROUP_SIZE_Y"), 8);
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}
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// 分派函数
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static void Dispatch(
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FRHICommandListImmediate& RHICmdList,
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const FDeformationCSDispatchParams& Params);
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};
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@@ -2,7 +2,9 @@
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#include "IronBlock.h"
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// 确保包含了 RDG 所需的头文件
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#include "RenderGraphBuilder.h"
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#include "RenderGraphUtils.h" // FComputeShaderUtils::AddPass
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#include "FDeformComputeShader.h" // 确保这个头文件存在且包含了 FDeformationCSDispatchParams
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#include "StaticMeshResources.h"
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#include "TextureResource.h"
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@@ -12,7 +14,6 @@
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#include "Materials/MaterialInstanceDynamic.h"
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#include "PhysicsEngine/BodySetup.h"
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#include "RHICommandList.h"
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#include "RenderGraphBuilder.h" // 包含 FRDGBuilder
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#include "Engine/Texture.h"
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#include "GenericPlatform/GenericPlatformProcess.h"
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@@ -328,11 +329,11 @@ void AIronBlock::ExecuteDeformationCS()
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// --- 关键修复: 在游戏线程只获取 Input RHI Texture 句柄 ---
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FTextureRHIRef InputRHI = GetRenderTargetRHI(ReadTarget);
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FTextureRHIRef WriteRHI = GetRenderTargetRHI(WriteTarget); // 必须获取写入目标的RHI
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// 检查 Input RHI 和 WriteTarget UObject 是否有效
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if (!InputRHI.IsValid() || !WriteTarget)
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if (!InputRHI.IsValid() || !WriteRHI.IsValid())
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{
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UE_LOG(LogTemp, Error, TEXT("Invalid texture RHI resources or WriteTarget UObject!"));
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UE_LOG(LogTemp, Error, TEXT("Invalid texture RHI resources!"));
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return;
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}
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@@ -355,68 +356,87 @@ void AIronBlock::ExecuteDeformationCS()
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if (UpdateRegion.Min.X >= UpdateRegion.Max.X) UpdateRegion.Max.X = UpdateRegion.Min.X + 1;
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if (UpdateRegion.Min.Y >= UpdateRegion.Max.Y) UpdateRegion.Max.Y = UpdateRegion.Min.Y + 1;
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// 准备参数
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FDeformationCSDispatchParams Params;
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Params.ImpactPoint = CurrentImpactPoint; // 确保类型匹配 (FVector -> FVector3f)
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Params.ImpactNormal = CurrentImpactNormal;
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Params.ImpactForce = CurrentImpactForce;
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Params.DeformationRadius = CurrentDeformationRadius;
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Params.Plasticity = CurrentPlasticity;
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Params.InputTexture = InputRHI;
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//Params.OutputTexture = OutputUAV; // **直接使用RT的UAV**
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Params.UpdateRegion = UpdateRegion;
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Params.TextureSize = FIntVector(TexSize, TexSize, 1);
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// 在渲染线程中执行Compute Shader
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ENQUEUE_RENDER_COMMAND(ExecuteDeformationCS)(
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[Params, WriteTarget](FRHICommandListImmediate& RHICmdList)
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// --- 关键修改：使用 RDG ---
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ENQUEUE_RENDER_COMMAND(ExecuteDeformationCS_RDG)(
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[
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// 捕获所有需要的参数
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InputRHI,
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WriteRHI,
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CurrentImpactPoint = this->CurrentImpactPoint, // 拷贝一份
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CurrentImpactNormal = this->CurrentImpactNormal,
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CurrentImpactForce = this->CurrentImpactForce,
|
||||
CurrentDeformationRadius = this->CurrentDeformationRadius,
|
||||
CurrentPlasticity = this->CurrentPlasticity,
|
||||
UpdateRegion, //
|
||||
TexSize //
|
||||
](FRHICommandListImmediate& RHICmdList)
|
||||
{
|
||||
// --- 现在我们在渲染线程上 ---
|
||||
// 1. 创建 RDG Builder
|
||||
FRDGBuilder builder(RHICmdList);
|
||||
|
||||
// 1. 从 UObject 获取 FTextureResource
|
||||
FTextureResource* RTResource = WriteTarget->GetResource();
|
||||
if (!RTResource)
|
||||
// 2. 将我们的外部 RT 注册到 RDG 中
|
||||
// 注意：我们使用 WriteRHI->GetDesc() 来获取纹理描述
|
||||
FRDGTextureRef RDGReadTexture = builder.RegisterExternalTexture(
|
||||
CreateRenderTarget(InputRHI, TEXT("DeformInputTex"))
|
||||
);
|
||||
FRDGTextureRef RDGWriteTexture = builder.RegisterExternalTexture(
|
||||
CreateRenderTarget(WriteRHI, TEXT("DeformOutputTex"))
|
||||
);
|
||||
|
||||
// 3. 分配着色器参数
|
||||
FDeformComputeShader::FParameters* Params = builder.AllocParameters<FDeformComputeShader::FParameters>();
|
||||
|
||||
// 4. 填充 CPU 参数
|
||||
Params->ImpactPoint = FVector3f(CurrentImpactPoint); // 注意：从 FVector 转为 FVector3f
|
||||
Params->ImpactNormal = FVector3f(CurrentImpactNormal);
|
||||
Params->ImpactForce = CurrentImpactForce;
|
||||
Params->DeformationRadius = CurrentDeformationRadius;
|
||||
Params->Plasticity = CurrentPlasticity;
|
||||
Params->UpdateRegionParam = FIntVector4(UpdateRegion.Min.X, UpdateRegion.Min.Y, UpdateRegion.Max.X, UpdateRegion.Max.Y);
|
||||
Params->TextureSize = FIntVector(TexSize, TexSize, 1);
|
||||
|
||||
// 5. ✨ 魔法发生的地方：RDG 为我们创建 SRV 和 UAV
|
||||
// 这就是解决你 nullptr 问题的核心
|
||||
Params->InputTexture = builder.CreateSRV(RDGReadTexture);
|
||||
Params->OutputTexture = builder.CreateUAV(RDGWriteTexture);
|
||||
|
||||
// 6. 获取着色器实例
|
||||
TShaderMapRef<FDeformComputeShader> ComputeShader(GetGlobalShaderMap(GMaxRHIFeatureLevel));
|
||||
if (!ComputeShader.IsValid())
|
||||
{
|
||||
UE_LOG(LogTemp, Error, TEXT("Failed to get WriteTarget resource on render thread!"));
|
||||
UE_LOG(LogTemp, Error, TEXT("FDeformComputeShader is not valid!"));
|
||||
return;
|
||||
}
|
||||
|
||||
// 2. 转换为 FTextureRenderTargetResource
|
||||
FTextureRenderTargetResource* WriteRTResource = static_cast<FTextureRenderTargetResource*>(RTResource);
|
||||
if (!WriteRTResource)
|
||||
{
|
||||
UE_LOG(LogTemp, Error, TEXT("Failed to cast to FTextureRenderTargetResource on render thread!"));
|
||||
return;
|
||||
}
|
||||
// 7. 计算线程组数量
|
||||
// (注意：你的USF需要处理 UpdateRegion，这里我们调度整个区域)
|
||||
FIntVector NumGroups = FIntVector::DivideAndRoundUp(
|
||||
FIntVector(UpdateRegion.Width(), UpdateRegion.Height(), 1),
|
||||
FDeformComputeShader::GetGroupSize()
|
||||
);
|
||||
// 如果你的shader总是处理整个纹理，请使用：
|
||||
// FIntVector NumGroups = FIntVector::DivideAndRoundUp(
|
||||
// Params->TextureSize, FDeformComputeShader::GetGroupSize()
|
||||
// );
|
||||
|
||||
// 3. ✨ 在渲染线程上调用 GetRenderTargetUAV()
|
||||
FUnorderedAccessViewRHIRef OutputUAV = WriteRTResource->GetRenderTargetUAV();
|
||||
// 8. 添加 Compute Pass
|
||||
FComputeShaderUtils::AddPass(
|
||||
builder,
|
||||
RDG_EVENT_NAME("ExecuteDeformationCS"),
|
||||
ComputeShader,
|
||||
Params,
|
||||
NumGroups
|
||||
);
|
||||
|
||||
// 4. 检查是否成功
|
||||
if (!OutputUAV.IsValid())
|
||||
{
|
||||
// 如果在这里仍然失败，说明 bCanCreateUAV=true 没有生效，
|
||||
// 或者 RHI 后端没有为这个 RT 创建 UAV。
|
||||
UE_LOG(LogTemp, Error, TEXT("GetRenderTargetUAV() returned null ON RENDER THREAD!"));
|
||||
return;
|
||||
}
|
||||
|
||||
// 5. 填充参数并调度
|
||||
FDeformationCSDispatchParams RenderParams = Params;
|
||||
RenderParams.OutputTexture = OutputUAV;
|
||||
|
||||
FDeformationCS::Dispatch(RHICmdList, RenderParams);
|
||||
|
||||
// 6. (重要) 添加一个UAV屏障
|
||||
// 告诉GPU，Compute Shader对UAV的写入操作已完成，
|
||||
// 在下一帧中，图形管线（材质）可以安全地将其作为 SRV (TextureSample) 读取。
|
||||
RHICmdList.Transition(FRHITransitionInfo(OutputUAV, ERHIAccess::UAVCompute, ERHIAccess::SRVGraphics));
|
||||
// 9. 执行 RDG (这会处理所有屏障和调度)
|
||||
builder.Execute();
|
||||
});
|
||||
|
||||
// 等待渲染命令完成，以便在CPU上读取 (如果需要立即更新碰撞体)
|
||||
// 注意：这是一个同步点，会影响性能。
|
||||
// --- 结束 RDG 修改 ---
|
||||
|
||||
// 确保渲染命令完成 (如果你需要立即更新碰撞体)
|
||||
// FlushRenderingCommands();
|
||||
// UpdateCollisionAsync(UpdateRegion, WriteTarget); // 异步更新碰撞体
|
||||
// UpdateCollisionAsync(UpdateRegion, WriteTarget);
|
||||
|
||||
// --- 关键修复: 更新材质参数，使其下一帧读取我们刚刚写入的纹理 ---
|
||||
if (DynMaterial)
|
||||
|
||||
Reference in New Issue
Block a user