public static string GetPreviewSubShader(AbstractMaterialNode node, ShaderGraphRequirements shaderGraphRequirements)
{
// Should never be called without a node
Debug.Assert(node != null);
var vertexOutputStruct = new ShaderStringBuilder(2);
var vertexShader = new ShaderStringBuilder(2);
var vertexShaderDescriptionInputs = new ShaderStringBuilder(2);
var vertexShaderOutputs = new ShaderStringBuilder(1);
var pixelShader = new ShaderStringBuilder(2);
var pixelShaderSurfaceInputs = new ShaderStringBuilder(2);
var pixelShaderSurfaceRemap = new ShaderStringBuilder(2);
ShaderGenerator.GenerateStandardTransforms(
0,
16,
vertexOutputStruct,
vertexShader,
vertexShaderDescriptionInputs,
vertexShaderOutputs,
pixelShader,
pixelShaderSurfaceInputs,
shaderGraphRequirements,
shaderGraphRequirements,
ShaderGraphRequirements.none,
ShaderGraphRequirements.none,
CoordinateSpace.World);
vertexShader.AppendLines(vertexShaderDescriptionInputs.ToString());
vertexShader.AppendLines(vertexShaderOutputs.ToString());
var outputSlot = node.GetOutputSlots <MaterialSlot>().FirstOrDefault();
// Sub Graph Output uses first input slot
if (node is SubGraphOutputNode)
{
outputSlot = node.GetInputSlots <MaterialSlot>().FirstOrDefault();
}
if (outputSlot != null)
{
var result = $"surf.{NodeUtils.GetHLSLSafeName(outputSlot.shaderOutputName)}_{outputSlot.id}";
pixelShaderSurfaceRemap.AppendLine("return all(isfinite({0})) ? {1} : {2};",
result, AdaptNodeOutputForPreview(node, outputSlot.id, result), nanOutput);
}
else
{
// No valid slots to display, so just show black.
// It's up to each node to error or warn as appropriate.
pixelShaderSurfaceRemap.AppendLine("return 0;");
}
// -------------------------------------
// Extra pixel shader work
var faceSign = new ShaderStringBuilder();
if (shaderGraphRequirements.requiresFaceSign)
{
faceSign.AppendLine(", half FaceSign : VFACE");
}
var res = subShaderTemplate.Replace("${Interpolators}", vertexOutputStruct.ToString());
res = res.Replace("${VertexShader}", vertexShader.ToString());
res = res.Replace("${FaceSign}", faceSign.ToString());
res = res.Replace("${LocalPixelShader}", pixelShader.ToString());
res = res.Replace("${SurfaceInputs}", pixelShaderSurfaceInputs.ToString());
res = res.Replace("${SurfaceOutputRemap}", pixelShaderSurfaceRemap.ToString());
return(res);
}
static void AddActiveFieldsFromGraphRequirements(IActiveFields activeFields, ShaderGraphRequirements requirements, string structName)
{
if (requirements.requiresScreenPosition)
{
activeFields.Add($"{structName}.ScreenPosition");
}
if (requirements.requiresVertexColor)
{
activeFields.Add($"{structName}.VertexColor");
}
if (requirements.requiresFaceSign)
{
activeFields.Add($"{structName}.FaceSign");
}
if (requirements.requiresNormal != 0)
{
if ((requirements.requiresNormal & NeededCoordinateSpace.Object) > 0)
{
activeFields.Add($"{structName}.ObjectSpaceNormal");
}
if ((requirements.requiresNormal & NeededCoordinateSpace.View) > 0)
{
activeFields.Add($"{structName}.ViewSpaceNormal");
}
if ((requirements.requiresNormal & NeededCoordinateSpace.World) > 0)
{
activeFields.Add($"{structName}.WorldSpaceNormal");
}
if ((requirements.requiresNormal & NeededCoordinateSpace.Tangent) > 0)
{
activeFields.Add($"{structName}.TangentSpaceNormal");
}
}
if (requirements.requiresTangent != 0)
{
if ((requirements.requiresTangent & NeededCoordinateSpace.Object) > 0)
{
activeFields.Add($"{structName}.ObjectSpaceTangent");
}
if ((requirements.requiresTangent & NeededCoordinateSpace.View) > 0)
{
activeFields.Add($"{structName}.ViewSpaceTangent");
}
if ((requirements.requiresTangent & NeededCoordinateSpace.World) > 0)
{
activeFields.Add($"{structName}.WorldSpaceTangent");
}
if ((requirements.requiresTangent & NeededCoordinateSpace.Tangent) > 0)
{
activeFields.Add($"{structName}.TangentSpaceTangent");
}
}
if (requirements.requiresBitangent != 0)
{
if ((requirements.requiresBitangent & NeededCoordinateSpace.Object) > 0)
{
activeFields.Add($"{structName}.ObjectSpaceBiTangent");
}
if ((requirements.requiresBitangent & NeededCoordinateSpace.View) > 0)
{
activeFields.Add($"{structName}.ViewSpaceBiTangent");
}
if ((requirements.requiresBitangent & NeededCoordinateSpace.World) > 0)
{
activeFields.Add($"{structName}.WorldSpaceBiTangent");
}
if ((requirements.requiresBitangent & NeededCoordinateSpace.Tangent) > 0)
{
activeFields.Add($"{structName}.TangentSpaceBiTangent");
}
}
if (requirements.requiresViewDir != 0)
{
if ((requirements.requiresViewDir & NeededCoordinateSpace.Object) > 0)
{
activeFields.Add($"{structName}.ObjectSpaceViewDirection");
}
if ((requirements.requiresViewDir & NeededCoordinateSpace.View) > 0)
{
activeFields.Add($"{structName}.ViewSpaceViewDirection");
}
if ((requirements.requiresViewDir & NeededCoordinateSpace.World) > 0)
{
activeFields.Add($"{structName}.WorldSpaceViewDirection");
}
if ((requirements.requiresViewDir & NeededCoordinateSpace.Tangent) > 0)
{
activeFields.Add($"{structName}.TangentSpaceViewDirection");
}
}
if (requirements.requiresPosition != 0)
{
if ((requirements.requiresPosition & NeededCoordinateSpace.Object) > 0)
{
activeFields.Add($"{structName}.ObjectSpacePosition");
}
if ((requirements.requiresPosition & NeededCoordinateSpace.View) > 0)
{
activeFields.Add($"{structName}.ViewSpacePosition");
}
if ((requirements.requiresPosition & NeededCoordinateSpace.World) > 0)
{
activeFields.Add($"{structName}.WorldSpacePosition");
}
if ((requirements.requiresPosition & NeededCoordinateSpace.Tangent) > 0)
{
activeFields.Add($"{structName}.TangentSpacePosition");
}
if ((requirements.requiresPosition & NeededCoordinateSpace.AbsoluteWorld) > 0)
{
activeFields.Add($"{structName}.AbsoluteWorldSpacePosition");
}
}
foreach (var channel in requirements.requiresMeshUVs.Distinct())
{
activeFields.Add($"{structName}.{channel.GetUVName()}");
}
if (requirements.requiresTime)
{
activeFields.Add($"{structName}.TimeParameters");
}
if (requirements.requiresVertexSkinning)
{
activeFields.Add($"{structName}.BoneWeights");
activeFields.Add($"{structName}.BoneIndices");
}
}
public static void GenerateStandardTransforms(
int interpolatorStartIndex,
int maxInterpolators,
ShaderStringBuilder vertexOutputStruct,
ShaderStringBuilder vertexShader,
ShaderStringBuilder vertexShaderDescriptionInputs,
ShaderStringBuilder vertexShaderOutputs,
ShaderStringBuilder pixelShader,
ShaderStringBuilder pixelShaderSurfaceInputs,
ShaderGraphRequirements pixelRequirements,
ShaderGraphRequirements surfaceRequirements,
ShaderGraphRequirements modelRequiements,
ShaderGraphRequirements vertexRequirements,
CoordinateSpace preferredCoordinateSpace)
{
// ----------------------------------------------------- //
// SETUP //
// ----------------------------------------------------- //
// -------------------------------------
// Tangent space requires going via World space
if (preferredCoordinateSpace == CoordinateSpace.Tangent)
{
preferredCoordinateSpace = CoordinateSpace.World;
}
// -------------------------------------
// Generate combined graph requirements
var graphModelRequirements = pixelRequirements.Union(modelRequiements);
var combinedRequirements = vertexRequirements.Union(graphModelRequirements);
int interpolatorIndex = interpolatorStartIndex;
// ----------------------------------------------------- //
// GENERATE VERTEX > PIXEL PIPELINE //
// ----------------------------------------------------- //
// -------------------------------------
// If any stage requires component write into vertex stage
// If model or pixel requires component write into interpolators and pixel stage
// -------------------------------------
// Position
if (combinedRequirements.requiresPosition > 0)
{
var name = preferredCoordinateSpace.ToVariableName(InterpolatorType.Position);
var preferredSpacePosition = ConvertBetweenSpace("v.vertex", CoordinateSpace.Object, preferredCoordinateSpace, InputType.Position);
vertexShader.AppendLine("float3 {0} = {1}.xyz;", name, preferredSpacePosition);
if (graphModelRequirements.requiresPosition > 0)
{
vertexOutputStruct.AppendLine("float3 {0} : TEXCOORD{1};", name, interpolatorIndex);
vertexShaderOutputs.AppendLine("o.{0} = {0};", name);
pixelShader.AppendLine("float3 {0} = IN.{0};", name);
interpolatorIndex++;
}
}
// -------------------------------------
// Normal
// Bitangent needs Normal for x product
if (combinedRequirements.requiresNormal > 0 || combinedRequirements.requiresBitangent > 0)
{
var name = preferredCoordinateSpace.ToVariableName(InterpolatorType.Normal);
vertexShader.AppendLine("float3 {0} = normalize({1});", name, ConvertBetweenSpace("v.normal", CoordinateSpace.Object, preferredCoordinateSpace, InputType.Normal));
if (graphModelRequirements.requiresNormal > 0 || graphModelRequirements.requiresBitangent > 0)
{
vertexOutputStruct.AppendLine("float3 {0} : TEXCOORD{1};", name, interpolatorIndex);
vertexShaderOutputs.AppendLine("o.{0} = {0};", name);
pixelShader.AppendLine("float3 {0} = IN.{0};", name);
interpolatorIndex++;
}
}
// -------------------------------------
// Tangent
if (combinedRequirements.requiresTangent > 0 || combinedRequirements.requiresBitangent > 0)
{
var name = preferredCoordinateSpace.ToVariableName(InterpolatorType.Tangent);
vertexShader.AppendLine("float3 {0} = normalize({1});", name, ConvertBetweenSpace("v.tangent.xyz", CoordinateSpace.Object, preferredCoordinateSpace, InputType.Vector));
if (graphModelRequirements.requiresTangent > 0 || graphModelRequirements.requiresBitangent > 0)
{
vertexOutputStruct.AppendLine("float3 {0} : TEXCOORD{1};", name, interpolatorIndex);
vertexShaderOutputs.AppendLine("o.{0} = {0};", name);
pixelShader.AppendLine("float3 {0} = IN.{0};", name);
interpolatorIndex++;
}
}
// -------------------------------------
// Bitangent
if (combinedRequirements.requiresBitangent > 0)
{
var name = preferredCoordinateSpace.ToVariableName(InterpolatorType.BiTangent);
vertexShader.AppendLine("float3 {0} = cross({1}, {2}.xyz) * {3};",
name,
preferredCoordinateSpace.ToVariableName(InterpolatorType.Normal),
preferredCoordinateSpace.ToVariableName(InterpolatorType.Tangent),
"v.tangent.w");
if (graphModelRequirements.requiresBitangent > 0)
{
vertexOutputStruct.AppendLine("float3 {0} : TEXCOORD{1};", name, interpolatorIndex);
vertexShaderOutputs.AppendLine("o.{0} = {0};", name);
pixelShader.AppendLine("float3 {0} = IN.{0};", name);
interpolatorIndex++;
}
}
// -------------------------------------
// View Direction
if (combinedRequirements.requiresViewDir > 0)
{
var name = preferredCoordinateSpace.ToVariableName(InterpolatorType.ViewDirection);
const string worldSpaceViewDir = "_WorldSpaceCameraPos.xyz - mul(GetObjectToWorldMatrix(), float4(v.vertex.xyz, 1.0)).xyz";
var preferredSpaceViewDir = ConvertBetweenSpace(worldSpaceViewDir, CoordinateSpace.World, preferredCoordinateSpace, InputType.Vector);
vertexShader.AppendLine("float3 {0} = {1};", name, preferredSpaceViewDir);
if (graphModelRequirements.requiresViewDir > 0)
{
vertexOutputStruct.AppendLine("float3 {0} : TEXCOORD{1};", name, interpolatorIndex);
vertexShaderOutputs.AppendLine("o.{0} = {0};", name);
pixelShader.AppendLine("float3 {0} = IN.{0};", name);
interpolatorIndex++;
}
}
// -------------------------------------
// Tangent space transform matrix
if (combinedRequirements.NeedsTangentSpace())
{
var tangent = preferredCoordinateSpace.ToVariableName(InterpolatorType.Tangent);
var bitangent = preferredCoordinateSpace.ToVariableName(InterpolatorType.BiTangent);
var normal = preferredCoordinateSpace.ToVariableName(InterpolatorType.Normal);
if (vertexRequirements.NeedsTangentSpace())
{
vertexShader.AppendLine("float3x3 tangentSpaceTransform = float3x3({0},{1},{2});",
tangent, bitangent, normal);
}
if (graphModelRequirements.NeedsTangentSpace())
{
pixelShader.AppendLine("float3x3 tangentSpaceTransform = float3x3({0},{1},{2});",
tangent, bitangent, normal);
}
}
// -------------------------------------
// Vertex Color
if (combinedRequirements.requiresVertexColor)
{
var vertexColor = "v.color";
vertexShader.AppendLine("float4 {0} = {1};", ShaderGeneratorNames.VertexColor, vertexColor);
if (graphModelRequirements.requiresVertexColor)
{
vertexOutputStruct.AppendLine("float4 {0} : COLOR;", ShaderGeneratorNames.VertexColor);
vertexShaderOutputs.AppendLine("o.{0} = {0};", ShaderGeneratorNames.VertexColor);
pixelShader.AppendLine("float4 {0} = IN.{0};", ShaderGeneratorNames.VertexColor);
}
}
// -------------------------------------
// Screen Position
if (combinedRequirements.requiresScreenPosition)
{
var screenPosition = "ComputeScreenPos(mul(GetWorldToHClipMatrix(), mul(GetObjectToWorldMatrix(), v.vertex)), _ProjectionParams.x)";
vertexShader.AppendLine("float4 {0} = {1};", ShaderGeneratorNames.ScreenPosition, screenPosition);
if (graphModelRequirements.requiresScreenPosition)
{
vertexOutputStruct.AppendLine("float4 {0} : TEXCOORD{1};", ShaderGeneratorNames.ScreenPosition, interpolatorIndex);
vertexShaderOutputs.AppendLine("o.{0} = {0};", ShaderGeneratorNames.ScreenPosition);
pixelShader.AppendLine("float4 {0} = IN.{0};", ShaderGeneratorNames.ScreenPosition);
interpolatorIndex++;
}
}
// -------------------------------------
// UV
foreach (var channel in combinedRequirements.requiresMeshUVs.Distinct())
{
vertexShader.AppendLine("float4 {0} = v.texcoord{1};", channel.GetUVName(), (int)channel);
}
foreach (var channel in graphModelRequirements.requiresMeshUVs.Distinct())
{
vertexOutputStruct.AppendLine("half4 {0} : TEXCOORD{1};", channel.GetUVName(), interpolatorIndex == 0 ? "" : interpolatorIndex.ToString());
vertexShaderOutputs.AppendLine("o.{0} = {0};", channel.GetUVName());
pixelShader.AppendLine("float4 {0} = IN.{0};", channel.GetUVName());
interpolatorIndex++;
}
// ----------------------------------------------------- //
// TRANSLATE NEEDED SPACES //
// ----------------------------------------------------- //
// -------------------------------------
// Generate the space translations needed by the vertex description
GenerateSpaceTranslations(vertexRequirements.requiresNormal, InterpolatorType.Normal, preferredCoordinateSpace,
InputType.Normal, vertexShader, Dimension.Three);
GenerateSpaceTranslations(vertexRequirements.requiresTangent, InterpolatorType.Tangent, preferredCoordinateSpace,
InputType.Vector, vertexShader, Dimension.Three);
GenerateSpaceTranslations(vertexRequirements.requiresBitangent, InterpolatorType.BiTangent, preferredCoordinateSpace,
InputType.Vector, vertexShader, Dimension.Three);
GenerateSpaceTranslations(vertexRequirements.requiresViewDir, InterpolatorType.ViewDirection, preferredCoordinateSpace,
InputType.Vector, vertexShader, Dimension.Three);
GenerateSpaceTranslations(vertexRequirements.requiresPosition, InterpolatorType.Position, preferredCoordinateSpace,
InputType.Position, vertexShader, Dimension.Three);
// -------------------------------------
// Generate the space translations needed by the surface description and model
GenerateSpaceTranslations(graphModelRequirements.requiresNormal, InterpolatorType.Normal, preferredCoordinateSpace,
InputType.Normal, pixelShader, Dimension.Three);
GenerateSpaceTranslations(graphModelRequirements.requiresTangent, InterpolatorType.Tangent, preferredCoordinateSpace,
InputType.Vector, pixelShader, Dimension.Three);
GenerateSpaceTranslations(graphModelRequirements.requiresBitangent, InterpolatorType.BiTangent, preferredCoordinateSpace,
InputType.Vector, pixelShader, Dimension.Three);
GenerateSpaceTranslations(graphModelRequirements.requiresViewDir, InterpolatorType.ViewDirection, preferredCoordinateSpace,
InputType.Vector, pixelShader, Dimension.Three);
GenerateSpaceTranslations(graphModelRequirements.requiresPosition, InterpolatorType.Position, preferredCoordinateSpace,
InputType.Position, pixelShader, Dimension.Three);
// ----------------------------------------------------- //
// START SURFACE DESCRIPTION //
// ----------------------------------------------------- //
// -------------------------------------
// Copy the locally defined values into the surface description
// structure using the requirements for ONLY the shader graph pixel stage
// additional requirements have come from the lighting model
// and are not needed in the shader graph
{
var replaceString = "surfaceInput.{0} = {0};";
GenerateSpaceTranslationSurfaceInputs(surfaceRequirements.requiresNormal, InterpolatorType.Normal, pixelShaderSurfaceInputs, replaceString);
GenerateSpaceTranslationSurfaceInputs(surfaceRequirements.requiresTangent, InterpolatorType.Tangent, pixelShaderSurfaceInputs, replaceString);
GenerateSpaceTranslationSurfaceInputs(surfaceRequirements.requiresBitangent, InterpolatorType.BiTangent, pixelShaderSurfaceInputs, replaceString);
GenerateSpaceTranslationSurfaceInputs(surfaceRequirements.requiresViewDir, InterpolatorType.ViewDirection, pixelShaderSurfaceInputs, replaceString);
GenerateSpaceTranslationSurfaceInputs(surfaceRequirements.requiresPosition, InterpolatorType.Position, pixelShaderSurfaceInputs, replaceString);
}
if (pixelRequirements.requiresVertexColor)
{
pixelShaderSurfaceInputs.AppendLine("surfaceInput.{0} = {0};", ShaderGeneratorNames.VertexColor);
}
if (pixelRequirements.requiresScreenPosition)
{
pixelShaderSurfaceInputs.AppendLine("surfaceInput.{0} = {0};", ShaderGeneratorNames.ScreenPosition);
}
if (pixelRequirements.requiresFaceSign)
{
pixelShaderSurfaceInputs.AppendLine("surfaceInput.{0} = {0};", ShaderGeneratorNames.FaceSign);
}
foreach (var channel in pixelRequirements.requiresMeshUVs.Distinct())
{
pixelShaderSurfaceInputs.AppendLine("surfaceInput.{0} = {0};", ShaderGeneratorNames.GetUVName(channel));
}
// ----------------------------------------------------- //
// START VERTEX DESCRIPTION //
// ----------------------------------------------------- //
// -------------------------------------
// Copy the locally defined values into the vertex description
// structure using the requirements for ONLY the shader graph vertex stage
// additional requirements have come from the lighting model
// and are not needed in the shader graph
{
var replaceString = "vdi.{0} = {0};";
GenerateSpaceTranslationSurfaceInputs(vertexRequirements.requiresNormal, InterpolatorType.Normal, vertexShaderDescriptionInputs, replaceString);
GenerateSpaceTranslationSurfaceInputs(vertexRequirements.requiresTangent, InterpolatorType.Tangent, vertexShaderDescriptionInputs, replaceString);
GenerateSpaceTranslationSurfaceInputs(vertexRequirements.requiresBitangent, InterpolatorType.BiTangent, vertexShaderDescriptionInputs, replaceString);
GenerateSpaceTranslationSurfaceInputs(vertexRequirements.requiresViewDir, InterpolatorType.ViewDirection, vertexShaderDescriptionInputs, replaceString);
GenerateSpaceTranslationSurfaceInputs(vertexRequirements.requiresPosition, InterpolatorType.Position, vertexShaderDescriptionInputs, replaceString);
}
if (vertexRequirements.requiresVertexColor)
{
vertexShaderDescriptionInputs.AppendLine("vdi.{0} = {0};", ShaderGeneratorNames.VertexColor);
}
if (vertexRequirements.requiresScreenPosition)
{
vertexShaderDescriptionInputs.AppendLine("vdi.{0} = {0};", ShaderGeneratorNames.ScreenPosition);
}
foreach (var channel in vertexRequirements.requiresMeshUVs.Distinct())
{
vertexShaderDescriptionInputs.AppendLine("vdi.{0} = {0};", channel.GetUVName(), (int)channel);
}
}
static void GetActiveFieldsAndPermutationsForNodes(AbstractMaterialNode masterNode, ShaderPass pass,
KeywordCollector keywordCollector, List <AbstractMaterialNode> vertexNodes, List <AbstractMaterialNode> pixelNodes,
List <int>[] vertexNodePermutations, List <int>[] pixelNodePermutations,
ActiveFields activeFields, out ShaderGraphRequirementsPerKeyword graphRequirements)
{
// Initialize requirements
ShaderGraphRequirementsPerKeyword pixelRequirements = new ShaderGraphRequirementsPerKeyword();
ShaderGraphRequirementsPerKeyword vertexRequirements = new ShaderGraphRequirementsPerKeyword();
graphRequirements = new ShaderGraphRequirementsPerKeyword();
// Evaluate all Keyword permutations
if (keywordCollector.permutations.Count > 0)
{
for (int i = 0; i < keywordCollector.permutations.Count; i++)
{
// Get active nodes for this permutation
var localVertexNodes = Graphing.ListPool <AbstractMaterialNode> .Get();
var localPixelNodes = Graphing.ListPool <AbstractMaterialNode> .Get();
NodeUtils.DepthFirstCollectNodesFromNode(localVertexNodes, masterNode, NodeUtils.IncludeSelf.Include, pass.vertexPorts, keywordCollector.permutations[i]);
NodeUtils.DepthFirstCollectNodesFromNode(localPixelNodes, masterNode, NodeUtils.IncludeSelf.Include, pass.pixelPorts, keywordCollector.permutations[i]);
// Track each vertex node in this permutation
foreach (AbstractMaterialNode vertexNode in localVertexNodes)
{
int nodeIndex = vertexNodes.IndexOf(vertexNode);
if (vertexNodePermutations[nodeIndex] == null)
{
vertexNodePermutations[nodeIndex] = new List <int>();
}
vertexNodePermutations[nodeIndex].Add(i);
}
// Track each pixel node in this permutation
foreach (AbstractMaterialNode pixelNode in localPixelNodes)
{
int nodeIndex = pixelNodes.IndexOf(pixelNode);
if (pixelNodePermutations[nodeIndex] == null)
{
pixelNodePermutations[nodeIndex] = new List <int>();
}
pixelNodePermutations[nodeIndex].Add(i);
}
// Get requirements for this permutation
vertexRequirements[i].SetRequirements(ShaderGraphRequirements.FromNodes(localVertexNodes, ShaderStageCapability.Vertex, false));
pixelRequirements[i].SetRequirements(ShaderGraphRequirements.FromNodes(localPixelNodes, ShaderStageCapability.Fragment, false));
// Add active fields
AddActiveFieldsFromGraphRequirements(activeFields[i], vertexRequirements[i].requirements, "VertexDescriptionInputs");
AddActiveFieldsFromGraphRequirements(activeFields[i], pixelRequirements[i].requirements, "SurfaceDescriptionInputs");
}
}
// No Keywords
else
{
// Get requirements
vertexRequirements.baseInstance.SetRequirements(ShaderGraphRequirements.FromNodes(vertexNodes, ShaderStageCapability.Vertex, false));
pixelRequirements.baseInstance.SetRequirements(ShaderGraphRequirements.FromNodes(pixelNodes, ShaderStageCapability.Fragment, false));
// Add active fields
AddActiveFieldsFromGraphRequirements(activeFields.baseInstance, vertexRequirements.baseInstance.requirements, "VertexDescriptionInputs");
AddActiveFieldsFromGraphRequirements(activeFields.baseInstance, pixelRequirements.baseInstance.requirements, "SurfaceDescriptionInputs");
}
// Build graph requirements
graphRequirements.UnionWith(pixelRequirements);
graphRequirements.UnionWith(vertexRequirements);
}
