您最多选择25个主题 主题必须以中文或者字母或数字开头,可以包含连字符 (-),并且长度不得超过35个字符
 
 
 
 

248 行
9.4 KiB

using UnityEditor.Graphing;
using System.Collections.Generic;
using System.Linq;
namespace UnityEditor.ShaderGraph
{
/* [Title("UV/Tri-Planar Mapping")]
public class UVTriPlanar : FunctionNInNOut, IGeneratesFunction, IMayRequireNormal, IMayRequireWorldPosition
{
private int slot0, slot1, slot2, slot3, slot4, slot5, slot6 = 0;
private string slot0Name = "texRef";
private string slot1Name = "tileFactor";
private string slot2Name = "blendFactor";
private string slot4Name = "normalRef";
private string slot5Name = "posRef";
private string slot6Name = "outputRef";
protected override string GetFunctionName()
{
return "unity_triplanar_" + precision;
}
public UVTriPlanar()
{
name = "UVTriPlanar";
slot0 = AddSlot("Texture", slot0Name, Graphing.SlotType.Input, SlotValueType.Sampler2D, Vector4.zero);
slot1 = AddSlot("Tile", slot1Name, Graphing.SlotType.Input, SlotValueType.Vector1, Vector4.zero);
slot2 = AddSlot("Blend", slot2Name, Graphing.SlotType.Input, SlotValueType.Vector1, Vector4.zero);
slot4 = AddSlot("Normals", slot4Name, Graphing.SlotType.Input, SlotValueType.Vector3, Vector3.one);
slot5 = AddSlot("Position", slot5Name, Graphing.SlotType.Input, SlotValueType.Vector3, Vector3.one);
slot6 = AddSlot("RGBA ", slot6Name, Graphing.SlotType.Output, SlotValueType.Vector4, Vector4.zero);
UpdateNodeAfterDeserialization();
}
public override bool hasPreview
{
get { return true; }
}
public override PreviewMode previewMode
{
get
{
return PreviewMode.Preview3D;
}
}
//TODO:Externalize
//Reference code from:http://www.chilliant.com/rgb2hsv.html
public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
{
var outputString = new ShaderGenerator();
// outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2", "arg3", samplerName), false);
outputString.AddShaderChunk(GetFunctionPrototype(), false);
outputString.Indent();
outputString.AddShaderChunk("{", false);
// create UVs from position
outputString.AddShaderChunk("float3 uvs = " + slot5Name + "*" + slot1Name + ";", false);
// use absolute value of normal as texture weights
outputString.AddShaderChunk("half3 blend = pow(abs(" + slot4Name + ")," + slot2Name + ");", false);
// make sure the weights sum up to 1 (divide by sum of x+y+z)
outputString.AddShaderChunk("blend /= dot(blend, 1.0);", false);
// read the three texture projections, for x,y,z axes
outputString.AddShaderChunk("float4 cx = " + "tex2D(" + slot0Name + ", uvs.yz);", false);
outputString.AddShaderChunk("float4 cy = " + "tex2D(" + slot0Name + ", uvs.xz);", false);
outputString.AddShaderChunk("float4 cz = " + "tex2D(" + slot0Name + ", uvs.xy);", false);
// blend the textures based on weights
outputString.AddShaderChunk(slot6Name + " = cx * blend.x + cy * blend.y + cz * blend.z;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
visitor.AddShaderChunk(outputString.GetShaderString(0), true);
}
//prevent validation errors when a sampler2D input is missing
//use on any input requiring a Texture2DNode
public override void ValidateNode()
{
base.ValidateNode();
var slot = FindInputSlot<MaterialSlot>(0);
if (slot == null)
return;
var edges = owner.GetEdges(slot.slotReference).ToList();
hasError |= edges.Count == 0;
}
public bool RequiresNormal()
{
return true;
}
public bool RequiresWorldPosition()
{
return true;
}
}
}
///////////////// TEXTURE2D version below. Works fine, but the master nodes don't jive with it //////////////////////////
/*
namespace UnityEditor.ShaderGraph
{
[Title("UV/Tri-Planar Mapping")]
public class UVTriPlanar : FunctionNInNOut, IGeneratesFunction, IMayRequireNormal, IMayRequireWorldPosition
{
private int slot0, slot1, slot2, slot3, slot4, slot5, slot6 = 0;
private string slot0Name = "texRef";
private string slot1Name = "tileFactor";
private string slot2Name = "blendFactor";
private string slot3Name = "samplerRef";
private string slot4Name = "normalRef";
private string slot5Name = "posRef";
private string slot6Name = "outputRef";
protected override string GetFunctionName()
{
return "unity_triplanar_" + precision;
}
public UVTriPlanar()
{
name = "UVTriPlanar";
slot0 = AddSlot("Texture", slot0Name, Graphing.SlotType.Input, SlotValueType.Texture2D, Vector4.zero);
slot1 = AddSlot("Tile", slot1Name, Graphing.SlotType.Input, SlotValueType.Vector1, Vector4.zero);
slot2 = AddSlot("Blend", slot2Name, Graphing.SlotType.Input, SlotValueType.Vector1, Vector4.zero);
slot3 = AddSlot("Sampler", slot3Name, Graphing.SlotType.Input, SlotValueType.SamplerState, Vector4.zero);
slot4 = AddSlot("Normals", slot4Name, Graphing.SlotType.Input, SlotValueType.Vector3, Vector3.one);
slot5 = AddSlot("Position", slot5Name, Graphing.SlotType.Input, SlotValueType.Vector3, Vector3.one);
slot6 = AddSlot("RGBA ", slot6Name, Graphing.SlotType.Output, SlotValueType.Vector4, Vector4.zero);
UpdateNodeAfterDeserialization();
}
public override bool hasPreview
{
get { return true; }
}
public override PreviewMode previewMode
{
get
{
return PreviewMode.Preview3D;
}
}
//TODO:Externalize
//Reference code from:http://www.chilliant.com/rgb2hsv.html
public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
{
var outputString = new ShaderGenerator();
//Sampler input
var samplerName = GetSamplerInput(3);
outputString.AddShaderChunk("#ifdef UNITY_COMPILER_HLSL", false);
// outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2", "arg3", samplerName), false);
outputString.AddShaderChunk(GetFunctionPrototype(), false);
outputString.Indent();
outputString.AddShaderChunk("{", false);
// create UVs from position
outputString.AddShaderChunk("float3 uvs = " + slot5Name + "*" + slot1Name + ";", false);
// use absolute value of normal as texture weights
outputString.AddShaderChunk("half3 blend = pow(abs(" + slot4Name + ")," + slot2Name + ");", false);
// make sure the weights sum up to 1 (divide by sum of x+y+z)
outputString.AddShaderChunk("blend /= dot(blend, 1.0);", false);
// read the three texture projections, for x,y,z axes
outputString.AddShaderChunk("float4 cx = " + slot0Name + ".Sample(" + slot3Name + ", uvs.yz);", false);
outputString.AddShaderChunk("float4 cy = " + slot0Name + ".Sample(" + slot3Name + ", uvs.xz);", false);
outputString.AddShaderChunk("float4 cz = " + slot0Name + ".Sample(" + slot3Name + ", uvs.xy);", false);
// blend the textures based on weights
outputString.AddShaderChunk(slot6Name + " = cx * blend.x + cy * blend.y + cz * blend.z;", false);
//outputString.AddShaderChunk("return " + "c;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
outputString.AddShaderChunk("#endif", true);
visitor.AddShaderChunk(outputString.GetShaderString(0), true);
}
public override void GeneratePropertyUsages(ShaderGenerator visitor, GenerationMode generationMode)
{
//Sampler input slot
base.GeneratePropertyUsages(visitor, generationMode);
var samplerSlot = FindInputSlot<MaterialSlot>(slot3);
if (samplerSlot != null)
{
var samplerName = GetSamplerInput(slot3);
visitor.AddShaderChunk("#ifdef UNITY_COMPILER_HLSL", false);
visitor.AddShaderChunk("SamplerState " + samplerName + ";", true);
visitor.AddShaderChunk("#endif", false);
}
}
//prevent validation errors when a sampler2D input is missing
//use on any input requiring a Texture2DNode
public override void ValidateNode()
{
base.ValidateNode();
var slot = FindInputSlot<MaterialSlot>(0);
if (slot == null)
return;
var edges = owner.GetEdges(slot.slotReference).ToList();
hasError |= edges.Count == 0;
}
public bool RequiresNormal()
{
return true;
}
public bool RequiresWorldPosition()
{
return true;
}
}*/
}