public void GenerateNodeCode(ShaderStringBuilder sb, GenerationMode generationMode)
{
var outputSlot = FindOutputSlot <MaterialSlot>(OutputSlotId);
bool isGeneratingSubgraph = owner.isSubGraph && (generationMode != GenerationMode.Preview);
if (generationMode == GenerationMode.Preview || !isGeneratingSubgraph)
{
sb.AppendLine(string.Format($"{outputSlot.concreteValueType.ToShaderString()} {GetVariableNameForSlot(OutputSlotId)};"));
var value = GetSlotValue(GetSlotIdForActiveSelection(), generationMode);
sb.AppendLine(string.Format($"{GetVariableNameForSlot(OutputSlotId)} = {value};"));
}
else
{
// Iterate all entries in the dropdown
for (int i = 0; i < dropdown.entries.Count; i++)
{
if (i == 0)
{
sb.AppendLine(string.Format($"{outputSlot.concreteValueType.ToShaderString()} {GetVariableNameForSlot(OutputSlotId)};"));
sb.AppendLine($"if ({m_Dropdown.value.referenceName} == {i})");
}
else
{
sb.AppendLine($"else if ({m_Dropdown.value.referenceName} == {i})");
}
{
sb.AppendLine("{");
sb.IncreaseIndent();
var value = GetSlotValue(GetSlotIdForPermutation(new KeyValuePair <ShaderDropdown, int>(dropdown, i)), generationMode);
sb.AppendLine(string.Format($"{GetVariableNameForSlot(OutputSlotId)} = {value};"));
sb.DecreaseIndent();
sb.AppendLine("}");
}
if (i == dropdown.entries.Count - 1)
{
sb.AppendLine($"else");
sb.AppendLine("{");
sb.IncreaseIndent();
var value = GetSlotValue(GetSlotIdForPermutation(new KeyValuePair <ShaderDropdown, int>(dropdown, 0)), generationMode);
sb.AppendLine(string.Format($"{GetVariableNameForSlot(OutputSlotId)} = {value};"));
sb.DecreaseIndent();
sb.AppendLine("}");
}
}
}
}
public static void GetKeywordPermutationDeclarations(ShaderStringBuilder sb, List <List <KeyValuePair <ShaderKeyword, int> > > permutations)
{
if (permutations.Count == 0)
{
return;
}
for (int p = 0; p < permutations.Count; p++)
{
// ShaderStringBuilder.Append doesnt apply indentation
sb.AppendIndentation();
// Append correct if
bool isLast = false;
if (p == 0)
{
sb.Append("#if ");
}
else if (p == permutations.Count - 1)
{
sb.Append("#else");
isLast = true;
}
else
{
sb.Append("#elif ");
}
// Last permutation is always #else
if (!isLast)
{
// Track whether && is required
bool appendAnd = false;
// Iterate all keywords that are part of the permutation
for (int i = 0; i < permutations[p].Count; i++)
{
// When previous keyword was inserted subsequent requires &&
string and = appendAnd ? " && " : string.Empty;
switch (permutations[p][i].Key.keywordType)
{
case KeywordType.Enum:
{
sb.Append($"{and}defined({permutations[p][i].Key.referenceName}_{permutations[p][i].Key.entries[permutations[p][i].Value].referenceName})");
appendAnd = true;
break;
}
case KeywordType.Boolean:
{
// HLSL does not support a !value predicate
if (permutations[p][i].Value != 0)
{
continue;
}
sb.Append($"{and}defined({permutations[p][i].Key.referenceName})");
appendAnd = true;
break;
}
default:
throw new ArgumentOutOfRangeException();
}
}
}
sb.AppendNewLine();
// Define the matching permutation keyword
sb.IncreaseIndent();
sb.AppendLine($"#define KEYWORD_PERMUTATION_{p}");
sb.DecreaseIndent();
}
// End statement
sb.AppendLine("#endif");
}
private static string GetShaderPassFromTemplate(UnlitMasterNode masterNode, Pass pass, GenerationMode mode)
{
var builder = new ShaderStringBuilder();
builder.IncreaseIndent();
builder.IncreaseIndent();
var surfaceDescriptionFunction = new ShaderGenerator();
var surfaceDescriptionStruct = new ShaderGenerator();
var surfaceInputs = new ShaderGenerator();
var functionRegistry = new FunctionRegistry(builder);
var shaderProperties = new PropertyCollector();
surfaceInputs.AddShaderChunk("struct SurfaceInputs{", false);
surfaceInputs.Indent();
var activeNodeList = ListPool <INode> .Get();
NodeUtils.DepthFirstCollectNodesFromNode(activeNodeList, masterNode, NodeUtils.IncludeSelf.Include, pass.PixelShaderSlots);
var requirements = ShaderGraphRequirements.FromNodes(activeNodeList);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresNormal, InterpolatorType.Normal, surfaceInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresTangent, InterpolatorType.Tangent, surfaceInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresBitangent, InterpolatorType.BiTangent, surfaceInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresViewDir, InterpolatorType.ViewDirection, surfaceInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresPosition, InterpolatorType.Position, surfaceInputs);
ShaderGenerator defines = new ShaderGenerator();
defines.AddShaderChunk(string.Format("#define SHADERPASS {0}", pass.ShaderPassName), true);
if (requirements.requiresVertexColor)
{
surfaceInputs.AddShaderChunk(string.Format("float4 {0};", ShaderGeneratorNames.VertexColor), false);
}
if (requirements.requiresScreenPosition)
{
surfaceInputs.AddShaderChunk(string.Format("float4 {0};", ShaderGeneratorNames.ScreenPosition), false);
}
foreach (var channel in requirements.requiresMeshUVs.Distinct())
{
surfaceInputs.AddShaderChunk(string.Format("half4 {0};", channel.GetUVName()), false);
defines.AddShaderChunk(string.Format("#define ATTRIBUTES_NEED_TEXCOORD{0}", (int)channel), true);
defines.AddShaderChunk(string.Format("#define VARYINGS_NEED_TEXCOORD{0}", (int)channel), true);
}
surfaceInputs.Deindent();
surfaceInputs.AddShaderChunk("};", false);
var slots = new List <MaterialSlot>();
foreach (var id in pass.PixelShaderSlots)
{
var slot = masterNode.FindSlot <MaterialSlot>(id);
if (slot != null)
{
slots.Add(slot);
}
}
GraphUtil.GenerateSurfaceDescriptionStruct(surfaceDescriptionStruct, slots, true);
var usedSlots = new List <MaterialSlot>();
foreach (var id in pass.PixelShaderSlots)
{
usedSlots.Add(masterNode.FindSlot <MaterialSlot>(id));
}
GraphUtil.GenerateSurfaceDescription(
activeNodeList,
masterNode,
masterNode.owner as AbstractMaterialGraph,
surfaceDescriptionFunction,
functionRegistry,
shaderProperties,
requirements,
mode,
"PopulateSurfaceData",
"SurfaceDescription",
null,
usedSlots);
var graph = new ShaderGenerator();
graph.AddShaderChunk(shaderProperties.GetPropertiesDeclaration(2), false);
graph.AddShaderChunk(surfaceInputs.GetShaderString(2), false);
graph.AddShaderChunk(builder.ToString(), false);
graph.AddShaderChunk(surfaceDescriptionStruct.GetShaderString(2), false);
graph.AddShaderChunk(surfaceDescriptionFunction.GetShaderString(2), false);
var tagsVisitor = new ShaderGenerator();
var blendingVisitor = new ShaderGenerator();
var cullingVisitor = new ShaderGenerator();
var zTestVisitor = new ShaderGenerator();
var zWriteVisitor = new ShaderGenerator();
var materialOptions = new SurfaceMaterialOptions();
materialOptions.GetTags(tagsVisitor);
materialOptions.GetBlend(blendingVisitor);
materialOptions.GetCull(cullingVisitor);
materialOptions.GetDepthTest(zTestVisitor);
materialOptions.GetDepthWrite(zWriteVisitor);
var localPixelShader = new ShaderGenerator();
var localSurfaceInputs = new ShaderGenerator();
var surfaceOutputRemap = new ShaderGenerator();
foreach (var channel in requirements.requiresMeshUVs.Distinct())
{
localSurfaceInputs.AddShaderChunk(string.Format("surfaceInput.{0} = {1};", channel.GetUVName(), string.Format("half4(input.texCoord{0}, 0, 0)", (int)channel)), false);
}
var templateLocation = ShaderGenerator.GetTemplatePath("HDUnlitPassForward.template");
foreach (var slot in usedSlots)
{
surfaceOutputRemap.AddShaderChunk(slot.shaderOutputName
+ " = surf."
+ slot.shaderOutputName + ";", true);
}
if (!File.Exists(templateLocation))
{
return(string.Empty);
}
var subShaderTemplate = File.ReadAllText(templateLocation);
var resultPass = subShaderTemplate.Replace("${Defines}", defines.GetShaderString(3));
resultPass = resultPass.Replace("${Graph}", graph.GetShaderString(3));
resultPass = resultPass.Replace("${LocalPixelShader}", localPixelShader.GetShaderString(3));
resultPass = resultPass.Replace("${SurfaceInputs}", localSurfaceInputs.GetShaderString(3));
resultPass = resultPass.Replace("${SurfaceOutputRemap}", surfaceOutputRemap.GetShaderString(3));
resultPass = resultPass.Replace("${LightMode}", pass.Name);
resultPass = resultPass.Replace("${ShaderPassInclude}", pass.ShaderPassInclude);
resultPass = resultPass.Replace("${Tags}", tagsVisitor.GetShaderString(2));
resultPass = resultPass.Replace("${Blending}", blendingVisitor.GetShaderString(2));
resultPass = resultPass.Replace("${Culling}", cullingVisitor.GetShaderString(2));
resultPass = resultPass.Replace("${ZTest}", zTestVisitor.GetShaderString(2));
resultPass = resultPass.Replace("${ZWrite}", zWriteVisitor.GetShaderString(2));
resultPass = resultPass.Replace("${LOD}", "" + materialOptions.lod);
return(resultPass);
}
private static string GetShaderPassFromTemplate(string template, PBRMasterNode masterNode, Pass pass, GenerationMode mode, SurfaceMaterialOptions materialOptions)
{
var builder = new ShaderStringBuilder();
builder.IncreaseIndent();
builder.IncreaseIndent();
var vertexInputs = new ShaderGenerator();
var surfaceVertexShader = new ShaderGenerator();
var surfaceDescriptionFunction = new ShaderGenerator();
var surfaceDescriptionStruct = new ShaderGenerator();
var functionRegistry = new FunctionRegistry(builder);
var surfaceInputs = new ShaderGenerator();
var shaderProperties = new PropertyCollector();
surfaceInputs.AddShaderChunk("struct SurfaceInputs{", false);
surfaceInputs.Indent();
var activeNodeList = ListPool <INode> .Get();
NodeUtils.DepthFirstCollectNodesFromNode(activeNodeList, masterNode, NodeUtils.IncludeSelf.Include, pass.PixelShaderSlots);
var requirements = ShaderGraphRequirements.FromNodes(activeNodeList);
var modelRequiements = ShaderGraphRequirements.none;
modelRequiements.requiresNormal |= NeededCoordinateSpace.World;
modelRequiements.requiresTangent |= NeededCoordinateSpace.World;
modelRequiements.requiresBitangent |= NeededCoordinateSpace.World;
modelRequiements.requiresPosition |= NeededCoordinateSpace.World;
modelRequiements.requiresViewDir |= NeededCoordinateSpace.World;
modelRequiements.requiresMeshUVs.Add(UVChannel.UV1);
GraphUtil.GenerateApplicationVertexInputs(requirements.Union(modelRequiements), vertexInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresNormal, InterpolatorType.Normal, surfaceInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresTangent, InterpolatorType.Tangent, surfaceInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresBitangent, InterpolatorType.BiTangent, surfaceInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresViewDir, InterpolatorType.ViewDirection, surfaceInputs);
ShaderGenerator.GenerateSpaceTranslationSurfaceInputs(requirements.requiresPosition, InterpolatorType.Position, surfaceInputs);
if (requirements.requiresVertexColor)
{
surfaceInputs.AddShaderChunk(string.Format("float4 {0};", ShaderGeneratorNames.VertexColor), false);
}
if (requirements.requiresScreenPosition)
{
surfaceInputs.AddShaderChunk(string.Format("float4 {0};", ShaderGeneratorNames.ScreenPosition), false);
}
foreach (var channel in requirements.requiresMeshUVs.Distinct())
{
surfaceInputs.AddShaderChunk(string.Format("half4 {0};", channel.GetUVName()), false);
}
surfaceInputs.Deindent();
surfaceInputs.AddShaderChunk("};", false);
surfaceVertexShader.AddShaderChunk("GraphVertexInput PopulateVertexData(GraphVertexInput v){", false);
surfaceVertexShader.Indent();
surfaceVertexShader.AddShaderChunk("return v;", false);
surfaceVertexShader.Deindent();
surfaceVertexShader.AddShaderChunk("}", false);
var slots = new List <MaterialSlot>();
foreach (var id in pass.PixelShaderSlots)
{
slots.Add(masterNode.FindSlot <MaterialSlot>(id));
}
GraphUtil.GenerateSurfaceDescriptionStruct(surfaceDescriptionStruct, slots, true);
var usedSlots = new List <MaterialSlot>();
foreach (var id in pass.PixelShaderSlots)
{
usedSlots.Add(masterNode.FindSlot <MaterialSlot>(id));
}
GraphUtil.GenerateSurfaceDescription(
activeNodeList,
masterNode,
masterNode.owner as AbstractMaterialGraph,
surfaceDescriptionFunction,
functionRegistry,
shaderProperties,
requirements,
mode,
"PopulateSurfaceData",
"SurfaceDescription",
null,
usedSlots);
var graph = new ShaderGenerator();
graph.AddShaderChunk(shaderProperties.GetPropertiesDeclaration(2), false);
graph.AddShaderChunk(surfaceInputs.GetShaderString(2), false);
graph.AddShaderChunk(builder.ToString(), false);
graph.AddShaderChunk(vertexInputs.GetShaderString(2), false);
graph.AddShaderChunk(surfaceDescriptionStruct.GetShaderString(2), false);
graph.AddShaderChunk(surfaceVertexShader.GetShaderString(2), false);
graph.AddShaderChunk(surfaceDescriptionFunction.GetShaderString(2), false);
var blendingVisitor = new ShaderGenerator();
var cullingVisitor = new ShaderGenerator();
var zTestVisitor = new ShaderGenerator();
var zWriteVisitor = new ShaderGenerator();
materialOptions.GetBlend(blendingVisitor);
materialOptions.GetCull(cullingVisitor);
materialOptions.GetDepthTest(zTestVisitor);
materialOptions.GetDepthWrite(zWriteVisitor);
var interpolators = new ShaderGenerator();
var localVertexShader = new ShaderGenerator();
var localPixelShader = new ShaderGenerator();
var localSurfaceInputs = new ShaderGenerator();
var surfaceOutputRemap = new ShaderGenerator();
ShaderGenerator.GenerateStandardTransforms(
3,
10,
interpolators,
localVertexShader,
localPixelShader,
localSurfaceInputs,
requirements,
modelRequiements,
CoordinateSpace.World);
ShaderGenerator defines = new ShaderGenerator();
if (masterNode.IsSlotConnected(PBRMasterNode.NormalSlotId))
{
defines.AddShaderChunk("#define _NORMALMAP 1", true);
}
if (masterNode.model == PBRMasterNode.Model.Specular)
{
defines.AddShaderChunk("#define _SPECULAR_SETUP 1", true);
}
if (masterNode.IsSlotConnected(PBRMasterNode.AlphaThresholdSlotId))
{
defines.AddShaderChunk("#define _AlphaClip 1", true);
}
if (masterNode.surfaceType == SurfaceType.Transparent && masterNode.alphaMode == AlphaMode.Premultiply)
{
defines.AddShaderChunk("#define _ALPHAPREMULTIPLY_ON 1", true);
}
var templateLocation = ShaderGenerator.GetTemplatePath(template);
foreach (var slot in usedSlots)
{
surfaceOutputRemap.AddShaderChunk(string.Format("{0} = surf.{0};", slot.shaderOutputName), true);
}
if (!File.Exists(templateLocation))
{
return(string.Empty);
}
var subShaderTemplate = File.ReadAllText(templateLocation);
var resultPass = subShaderTemplate.Replace("${Defines}", defines.GetShaderString(3));
resultPass = resultPass.Replace("${Graph}", graph.GetShaderString(3));
resultPass = resultPass.Replace("${Interpolators}", interpolators.GetShaderString(3));
resultPass = resultPass.Replace("${VertexShader}", localVertexShader.GetShaderString(3));
resultPass = resultPass.Replace("${LocalPixelShader}", localPixelShader.GetShaderString(3));
resultPass = resultPass.Replace("${SurfaceInputs}", localSurfaceInputs.GetShaderString(3));
resultPass = resultPass.Replace("${SurfaceOutputRemap}", surfaceOutputRemap.GetShaderString(3));
resultPass = resultPass.Replace("${Tags}", string.Empty);
resultPass = resultPass.Replace("${Blending}", blendingVisitor.GetShaderString(2));
resultPass = resultPass.Replace("${Culling}", cullingVisitor.GetShaderString(2));
resultPass = resultPass.Replace("${ZTest}", zTestVisitor.GetShaderString(2));
resultPass = resultPass.Replace("${ZWrite}", zWriteVisitor.GetShaderString(2));
return(resultPass);
}
