public IEnumerable <string> GetSubshader(PBRMasterNode masterNode, GenerationMode mode)
{
var subShader = new ShaderGenerator();
subShader.AddShaderChunk("SubShader", true);
subShader.AddShaderChunk("{", true);
subShader.Indent();
subShader.AddShaderChunk("Tags{ \"RenderPipeline\" = \"LightweightPipeline\"}", true);
var materialOptions = MasterNode.GetMaterialOptionsFromAlphaMode(masterNode.alphaMode);
var tagsVisitor = new ShaderGenerator();
materialOptions.GetTags(tagsVisitor);
subShader.AddShaderChunk(tagsVisitor.GetShaderString(0), true);
subShader.AddShaderChunk(
GetShaderPassFromTemplate(
"lightweightPBRForwardPass.template",
masterNode,
masterNode.model == PBRMasterNode.Model.Metallic ? m_ForwardPassMetallic : m_ForwardPassSpecular,
mode,
materialOptions),
true);
var extraPassesTemplateLocation = ShaderGenerator.GetTemplatePath("lightweightPBRExtraPasses.template");
if (File.Exists(extraPassesTemplateLocation))
{
subShader.AddShaderChunk(File.ReadAllText(extraPassesTemplateLocation), true);
}
subShader.Deindent();
subShader.AddShaderChunk("}", true);
return(new[] { subShader.GetShaderString(0) });
}
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);
}
public IEnumerable <string> GetSubshader(PBRMasterNode masterNode, GenerationMode mode)
{
var subShader = new ShaderGenerator();
subShader.AddShaderChunk("SubShader", true);
subShader.AddShaderChunk("{", true);
subShader.Indent();
subShader.AddShaderChunk("Tags{ \"RenderPipeline\" = \"LightweightPipeline\"}", true);
var materialOptions = new SurfaceMaterialOptions();
switch (masterNode.alphaMode)
{
case PBRMasterNode.AlphaMode.Opaque:
materialOptions.srcBlend = SurfaceMaterialOptions.BlendMode.One;
materialOptions.dstBlend = SurfaceMaterialOptions.BlendMode.Zero;
materialOptions.cullMode = SurfaceMaterialOptions.CullMode.Back;
materialOptions.zTest = SurfaceMaterialOptions.ZTest.LEqual;
materialOptions.zWrite = SurfaceMaterialOptions.ZWrite.On;
materialOptions.renderQueue = SurfaceMaterialOptions.RenderQueue.Geometry;
materialOptions.renderType = SurfaceMaterialOptions.RenderType.Opaque;
break;
case PBRMasterNode.AlphaMode.AlphaBlend:
materialOptions.srcBlend = SurfaceMaterialOptions.BlendMode.SrcAlpha;
materialOptions.dstBlend = SurfaceMaterialOptions.BlendMode.OneMinusSrcAlpha;
materialOptions.cullMode = SurfaceMaterialOptions.CullMode.Back;
materialOptions.zTest = SurfaceMaterialOptions.ZTest.LEqual;
materialOptions.zWrite = SurfaceMaterialOptions.ZWrite.Off;
materialOptions.renderQueue = SurfaceMaterialOptions.RenderQueue.Transparent;
materialOptions.renderType = SurfaceMaterialOptions.RenderType.Transparent;
break;
case PBRMasterNode.AlphaMode.AdditiveBlend:
materialOptions.srcBlend = SurfaceMaterialOptions.BlendMode.One;
materialOptions.dstBlend = SurfaceMaterialOptions.BlendMode.One;
materialOptions.cullMode = SurfaceMaterialOptions.CullMode.Back;
materialOptions.zTest = SurfaceMaterialOptions.ZTest.LEqual;
materialOptions.zWrite = SurfaceMaterialOptions.ZWrite.Off;
materialOptions.renderQueue = SurfaceMaterialOptions.RenderQueue.Transparent;
materialOptions.renderType = SurfaceMaterialOptions.RenderType.Transparent;
break;
}
var tagsVisitor = new ShaderGenerator();
materialOptions.GetTags(tagsVisitor);
subShader.AddShaderChunk(tagsVisitor.GetShaderString(0), true);
subShader.AddShaderChunk(
GetShaderPassFromTemplate(
"lightweightPBRForwardPass.template",
masterNode,
masterNode.model == PBRMasterNode.Model.Metallic ? m_ForwardPassMetallic : m_ForwardPassSpecular,
mode,
materialOptions),
true);
var extraPassesTemplateLocation = ShaderGenerator.GetTemplatePath("lightweightPBRExtraPasses.template");
if (File.Exists(extraPassesTemplateLocation))
{
subShader.AddShaderChunk(File.ReadAllText(extraPassesTemplateLocation), true);
}
subShader.Deindent();
subShader.AddShaderChunk("}", true);
return(new[] { subShader.GetShaderString(0) });
}