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104 行
3.4 KiB

using System;
using System.Collections.Generic;
using System.Linq;
#if UNITY_EDITOR
using UnityEditor;
#endif
using UnityEngine.Graphing;
namespace UnityEngine.MaterialGraph
{
[Title("Input/Depth Texture")]
public class DepthTextureNode : PropertyNode, IGeneratesBodyCode, IMayRequireMeshUV
{
protected const string kUVSlotName = "UV";
protected const string kOutputSlotName = "Output";
public const int UvSlotId = 0;
public const int OutputSlotId = 1;
public override bool hasPreview { get { return true; } }
public Texture2D defaultTexture { get; set; }
public DepthTextureNode()
{
name = "DepthTexture";
UpdateNodeAfterDeserialization();
}
public sealed override void UpdateNodeAfterDeserialization()
{
AddSlot(new MaterialSlot(OutputSlotId, kOutputSlotName, kOutputSlotName, SlotType.Output, SlotValueType.Vector4, Vector4.zero));
AddSlot(new MaterialSlot(UvSlotId, kUVSlotName, kUVSlotName, SlotType.Input, SlotValueType.Vector2, Vector4.zero, false));
RemoveSlotsNameNotMatching(validSlots);
}
protected int[] validSlots
{
get { return new[] { OutputSlotId, UvSlotId }; }
}
public virtual void GenerateNodeCode(ShaderGenerator visitor, GenerationMode generationMode)
{
var uvSlot = FindInputSlot<MaterialSlot>(UvSlotId);
if (uvSlot == null)
return;
var uvName = string.Format("{0}.xy", UVChannel.uv0.GetUVName());
var edges = owner.GetEdges(uvSlot.slotReference).ToList();
if (edges.Count > 0)
{
var edge = edges[0];
var fromNode = owner.GetNodeFromGuid<AbstractMaterialNode>(edge.outputSlot.nodeGuid);
uvName = ShaderGenerator.AdaptNodeOutput(fromNode, edge.outputSlot.slotId, ConcreteSlotValueType.Vector2, true);
}
string body = "tex2D (_CameraDepthTexture, " + uvName + ")";
visitor.AddShaderChunk(precision + "4 " + GetVariableNameForNode() + " = " + body + ";", true);
}
public override void CollectPreviewMaterialProperties(List<PreviewProperty> properties)
{
properties.Add(GetPreviewProperty());
}
public override void GeneratePropertyUsages(ShaderGenerator visitor, GenerationMode generationMode)
{
visitor.AddShaderChunk("sampler2D _CameraDepthTexture;", true);
}
public override PreviewProperty GetPreviewProperty()
{
return new PreviewProperty
{
m_Name = propertyName,
m_PropType = PropertyType.Texture2D,
m_Texture = defaultTexture
};
}
public override string GetVariableNameForSlot(int slotId)
{
return GetVariableNameForNode();
}
public override PropertyType propertyType { get { return PropertyType.Texture2D; } }
public bool RequiresMeshUV(UVChannel channel)
{
if (channel != UVChannel.uv0)
{
return false;
}
var uvSlot = FindInputSlot<MaterialSlot>(UvSlotId);
if (uvSlot == null)
return true;
var edges = owner.GetEdges(uvSlot.slotReference).ToList();
return edges.Count == 0;
}
}
}