public string GenerateShaderCollectionFileContent(List <CustomShaderMeta> shadersImportMetaList)
{
StringBuilder sb = new StringBuilder();
// Order is reverse
sb.AppendLine("// =============================================");
sb.AppendLine("// = Closet Hit Shader Collection =");
sb.AppendLine("// = Auto-generated File. Do not edit manually =");
sb.AppendLine($"// = Time: {System.DateTime.Now.ToLongDateString()} {System.DateTime.Now.ToLongTimeString()} =");
sb.AppendLine("// =============================================");
sb.AppendLine();
// sb.AppendLine("#pragma editor_sync_compilation");
shadersImportMetaList.ForEach((shader) => {
var relPath = GPUMainProgramPathProvider.RelativeToGPUMain(shader.absPath);
sb.AppendLine($"#include \"{relPath}\"");
});
sb.AppendLine("float3 Shade(inout Ray ray, RayHit hit, float3 ambientLightUpper)");
sb.AppendLine("{");
// TODO: Determine which kind of switch attribute works
// https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-switch
sb.AppendLine("switch(hit.matIndex)");
sb.AppendLine("{");
for (int s = 0; s < shadersImportMetaList.Count; s++)
{
sb.AppendLine($"case {s}:");
sb.AppendLine($" return {shadersImportMetaList[s].name}(ray, hit, ambientLightUpper);");
}
sb.AppendLine($"default:");
sb.AppendLine($" return float3(0, 0, 0);");
sb.AppendLine("}");
sb.AppendLine("}");
return(sb.ToString());
}
public string GenerateShaderCollectionFileContent(SortedList <string, GUID> sortedByName, SortedList <GUID, CustomShaderMeta> shadersImportMetaList)
{
Debug.Log("[ClosestHit] GenerateShaderCollectionFileContent");
StringBuilder sb = new StringBuilder();
// Order is reverse
sb.AppendLine("// =============================================");
sb.AppendLine("// = Closet Hit Shader Collection =");
sb.AppendLine("// = Auto-generated File. Do not edit manually =");
sb.AppendLine("// =============================================");
sb.AppendLine();
// sb.AppendLine("#pragma editor_sync_compilation");
foreach (var kvp in shadersImportMetaList)
{
var relPath = GPUMainProgramPathProvider.RelativeToGPUMain(kvp.Value.absPath);
sb.AppendLine($"#include \"{relPath}\"");
}
sb.AppendLine("void SecRays(Ray ray, RayHit hit, inout SecRaysAtHit secRays)");
sb.AppendLine("{");
// TODO: Determine which kind of switch attribute works
// https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-switch
sb.AppendLine(" switch(_Primitives[hit.primitiveId].materialIndex)");
sb.AppendLine(" {");
int secRaysIndex = 0;
foreach (var shaderNameGUIDPair in sortedByName)
{
var guid = shaderNameGUIDPair.Value;
sb.AppendLine($" case {secRaysIndex}:");
sb.AppendLine($" {shadersImportMetaList[guid].name}_SecRays(ray, hit, secRays);");
sb.AppendLine($" break;");
secRaysIndex++;
}
sb.AppendLine(" }");
sb.AppendLine("}");
sb.AppendLine("float3 ClosestHit(inout Ray ray, RayHit hit, float3 ambientLightUpper, float3 secondaryRayColor)");
sb.AppendLine("{");
// TODO: Determine which kind of switch attribute works
// https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-switch
sb.AppendLine("switch(_Primitives[hit.primitiveId].materialIndex)");
sb.AppendLine("{");
int index = 0;
foreach (var shaderNameGUIDPair in sortedByName)
{
var guid = shaderNameGUIDPair.Value;
sb.AppendLine($"case {index}:");
sb.AppendLine($" return {shadersImportMetaList[guid].name}(ray, hit, ambientLightUpper, secondaryRayColor);");
index++;
}
sb.AppendLine($"default:");
sb.AppendLine($" return float3(0, 1, 1);");
sb.AppendLine("}");
sb.AppendLine("}");
return(sb.ToString());
}