360 lines
14 KiB
C#
360 lines
14 KiB
C#
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using System;
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using System.Linq;
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using UnityEngine;
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using UnityEditor.Graphing;
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using UnityEditor.ShaderGraph.Internal;
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using System.Collections.Generic;
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using System.Text.RegularExpressions;
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namespace UnityEditor.ShaderGraph
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{
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class BlockNode : AbstractMaterialNode
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, IMayRequireNormal
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, IMayRequireTangent
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, IMayRequireBitangent
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, IMayRequireMeshUV
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, IMayRequireScreenPosition
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, IMayRequireViewDirection
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, IMayRequirePosition
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, IMayRequirePositionPredisplacement
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, IMayRequireVertexColor
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{
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[SerializeField]
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string m_SerializedDescriptor;
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[NonSerialized]
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ContextData m_ContextData;
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[NonSerialized]
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BlockFieldDescriptor m_Descriptor;
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public override bool canCutNode => false;
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public override bool canCopyNode => false;
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// Because the GraphData is deserialized after its child elements
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// the descriptor list is not built (and owner is not set)
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// at the time of node deserialization
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// Therefore we need to deserialize this element at GraphData.OnAfterDeserialize
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public string serializedDescriptor => m_SerializedDescriptor;
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public ContextData contextData
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{
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get => m_ContextData;
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set => m_ContextData = value;
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}
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public int index => contextData.blocks.IndexOf(this);
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public BlockFieldDescriptor descriptor
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{
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get => m_Descriptor;
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set => m_Descriptor = value;
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}
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const string k_CustomBlockDefaultName = "CustomInterpolator";
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internal enum CustomBlockType { Float = 1, Vector2 = 2, Vector3 = 3, Vector4 = 4 }
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internal bool isCustomBlock { get => m_Descriptor?.isCustom ?? false; }
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internal string customName
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{
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get => m_Descriptor.name;
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set => OnCustomBlockFieldModified(value, customWidth);
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}
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internal CustomBlockType customWidth
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{
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get => (CustomBlockType)ControlToWidth(m_Descriptor.control);
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set => OnCustomBlockFieldModified(customName, value);
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}
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public void Init(BlockFieldDescriptor fieldDescriptor)
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{
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m_Descriptor = fieldDescriptor;
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// custom blocks can be "copied" via a custom Field Descriptor, we'll use the CI name instead though.
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name = !isCustomBlock
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? $"{fieldDescriptor.tag}.{fieldDescriptor.name}"
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: $"{BlockFields.VertexDescription.name}.{k_CustomBlockDefaultName}";
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// TODO: This exposes the MaterialSlot API
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// TODO: This needs to be removed but is currently required by HDRP for DiffusionProfileInputMaterialSlot
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if (m_Descriptor is CustomSlotBlockFieldDescriptor customSlotDescriptor)
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{
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var newSlot = customSlotDescriptor.createSlot();
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AddSlot(newSlot);
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RemoveSlotsNameNotMatching(new int[] { 0 });
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return;
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}
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AddSlotFromControlType();
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}
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internal void InitCustomDefault()
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{
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Init(MakeCustomBlockField(k_CustomBlockDefaultName, CustomBlockType.Vector4));
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}
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private void AddSlotFromControlType(bool attemptToModifyExisting = true)
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{
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// TODO: this should really just use callbacks like the CustomSlotBlockFieldDescriptor. then we wouldn't need this switch to make a copy
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var stageCapability = m_Descriptor.shaderStage.GetShaderStageCapability();
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switch (descriptor.control)
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{
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case PositionControl positionControl:
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AddSlot(new PositionMaterialSlot(0, descriptor.displayName, descriptor.name, positionControl.space, stageCapability), attemptToModifyExisting);
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break;
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case NormalControl normalControl:
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AddSlot(new NormalMaterialSlot(0, descriptor.displayName, descriptor.name, normalControl.space, stageCapability), attemptToModifyExisting);
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break;
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case TangentControl tangentControl:
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AddSlot(new TangentMaterialSlot(0, descriptor.displayName, descriptor.name, tangentControl.space, stageCapability), attemptToModifyExisting);
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break;
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case VertexColorControl vertexColorControl:
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AddSlot(new VertexColorMaterialSlot(0, descriptor.displayName, descriptor.name, stageCapability), attemptToModifyExisting);
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break;
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case ColorControl colorControl:
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var colorMode = colorControl.hdr ? ColorMode.HDR : ColorMode.Default;
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AddSlot(new ColorRGBMaterialSlot(0, descriptor.displayName, descriptor.name, SlotType.Input, colorControl.value, colorMode, stageCapability), attemptToModifyExisting);
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break;
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case ColorRGBAControl colorRGBAControl:
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AddSlot(new ColorRGBAMaterialSlot(0, descriptor.displayName, descriptor.name, SlotType.Input, colorRGBAControl.value, stageCapability), attemptToModifyExisting);
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break;
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case FloatControl floatControl:
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AddSlot(new Vector1MaterialSlot(0, descriptor.displayName, descriptor.name, SlotType.Input, floatControl.value, stageCapability), attemptToModifyExisting);
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break;
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case Vector2Control vector2Control:
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AddSlot(new Vector2MaterialSlot(0, descriptor.displayName, descriptor.name, SlotType.Input, vector2Control.value, stageCapability), attemptToModifyExisting);
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break;
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case Vector3Control vector3Control:
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AddSlot(new Vector3MaterialSlot(0, descriptor.displayName, descriptor.name, SlotType.Input, vector3Control.value, stageCapability), attemptToModifyExisting);
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break;
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case Vector4Control vector4Control:
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AddSlot(new Vector4MaterialSlot(0, descriptor.displayName, descriptor.name, SlotType.Input, vector4Control.value, stageCapability), attemptToModifyExisting);
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break;
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}
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RemoveSlotsNameNotMatching(new int[] { 0 });
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}
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public override string GetVariableNameForNode()
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{
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// Temporary block nodes have temporary guids that cannot be used to set preview data
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// Since each block is unique anyway we just omit the guid
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return NodeUtils.GetHLSLSafeName(name);
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}
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public NeededCoordinateSpace RequiresNormal(ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return NeededCoordinateSpace.None;
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if (m_Descriptor.control == null)
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return NeededCoordinateSpace.None;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresNormal;
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}
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public NeededCoordinateSpace RequiresViewDirection(ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return NeededCoordinateSpace.None;
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if (m_Descriptor.control == null)
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return NeededCoordinateSpace.None;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresViewDir;
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}
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public NeededCoordinateSpace RequiresPosition(ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return NeededCoordinateSpace.None;
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if (m_Descriptor.control == null)
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return NeededCoordinateSpace.None;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresPosition;
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}
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public NeededCoordinateSpace RequiresPositionPredisplacement(ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return NeededCoordinateSpace.None;
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if (m_Descriptor.control == null)
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return NeededCoordinateSpace.None;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresPositionPredisplacement;
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}
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public NeededCoordinateSpace RequiresTangent(ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return NeededCoordinateSpace.None;
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if (m_Descriptor.control == null)
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return NeededCoordinateSpace.None;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresTangent;
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}
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public NeededCoordinateSpace RequiresBitangent(ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return NeededCoordinateSpace.None;
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if (m_Descriptor.control == null)
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return NeededCoordinateSpace.None;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresBitangent;
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}
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public bool RequiresMeshUV(UVChannel channel, ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return false;
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if (m_Descriptor.control == null)
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return false;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresMeshUVs.Contains(channel);
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}
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public bool RequiresScreenPosition(ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return false;
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if (m_Descriptor.control == null)
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return false;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresScreenPosition;
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}
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public bool RequiresVertexColor(ShaderStageCapability stageCapability)
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{
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if (stageCapability != m_Descriptor.shaderStage.GetShaderStageCapability())
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return false;
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if (m_Descriptor.control == null)
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return false;
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var requirements = m_Descriptor.control.GetRequirements();
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return requirements.requiresVertexColor;
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}
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private void OnCustomBlockFieldModified(string name, CustomBlockType width)
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{
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if (!isCustomBlock)
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{
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Debug.LogWarning(String.Format("{0} is not a custom interpolator.", this.name));
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return;
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}
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m_Descriptor = MakeCustomBlockField(name, width);
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// TODO: Preserve the original slot's value and try to reapply after the slot is updated.
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AddSlotFromControlType(false);
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owner?.ValidateGraph();
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}
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public override void OnBeforeSerialize()
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{
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base.OnBeforeSerialize();
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if (descriptor != null)
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{
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if (isCustomBlock)
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{
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int width = ControlToWidth(m_Descriptor.control);
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m_SerializedDescriptor = $"{m_Descriptor.tag}.{m_Descriptor.name}#{width}";
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}
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else
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{
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m_SerializedDescriptor = $"{m_Descriptor.tag}.{m_Descriptor.name}";
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}
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}
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}
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public override void OnAfterDeserialize()
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{
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// TODO: Go find someone to tell @esme not to do this.
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if (m_SerializedDescriptor.Contains("#"))
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{
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string descName = k_CustomBlockDefaultName;
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CustomBlockType descWidth = CustomBlockType.Vector4;
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var descTag = BlockFields.VertexDescription.name;
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name = $"{descTag}.{descName}";
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var wsplit = m_SerializedDescriptor.Split(new char[] { '#', '.' });
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try
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{
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descWidth = (CustomBlockType)int.Parse(wsplit[2]);
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}
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catch
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{
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Debug.LogWarning(String.Format("Bad width found while deserializing custom interpolator {0}, defaulting to 4.", m_SerializedDescriptor));
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descWidth = CustomBlockType.Vector4;
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}
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IControl control;
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try { control = (IControl)FindSlot<MaterialSlot>(0).InstantiateControl(); }
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catch { control = WidthToControl((int)descWidth); }
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descName = NodeUtils.ConvertToValidHLSLIdentifier(wsplit[1]);
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m_Descriptor = new BlockFieldDescriptor(descTag, descName, "", control, ShaderStage.Vertex, isCustom: true);
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}
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}
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#region CustomInterpolatorHelpers
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private static BlockFieldDescriptor MakeCustomBlockField(string name, CustomBlockType width)
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{
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name = NodeUtils.ConvertToValidHLSLIdentifier(name);
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var referenceName = name;
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var define = "";
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IControl control = WidthToControl((int)width);
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var tag = BlockFields.VertexDescription.name;
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return new BlockFieldDescriptor(tag, referenceName, define, control, ShaderStage.Vertex, isCustom: true);
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}
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private static IControl WidthToControl(int width)
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{
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switch (width)
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{
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case 1: return new FloatControl(default(float));
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case 2: return new Vector2Control(default(Vector2));
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case 3: return new Vector3Control(default(Vector3));
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case 4: return new Vector4Control(default(Vector4));
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default: return null;
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}
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}
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private static int ControlToWidth(IControl control)
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{
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switch (control)
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{
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case FloatControl a: return 1;
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case Vector2Control b: return 2;
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case Vector3Control c: return 3;
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case Vector4Control d: return 4;
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default: return -1;
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}
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}
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#endregion
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}
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}
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