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254 行
14 KiB

using UnityEngine.Graphing;
namespace UnityEngine.MaterialGraph
{
[Title("Art/BlendMode")]
public class BlendModeNode : Function2Input, IGeneratesFunction
{
public BlendModeNode()
{
name = "BlendMode";
}
protected override string GetFunctionName()
{
return "unity_blendmode_" + System.Enum.GetName(typeof(BlendModesEnum), m_BlendMode);
}
protected override string GetInputSlot1Name()
{
return "A|Blend/Src";
}
protected override string GetInputSlot2Name()
{
return "B|Base/Dest";
}
[SerializeField]
private BlendModesEnum m_BlendMode;
public BlendModesEnum blendMode
{
get { return m_BlendMode; }
set
{
if (m_BlendMode == value)
return;
m_BlendMode = value;
if (onModified != null)
{
onModified(this, ModificationScope.Graph);
}
}
}
/*This is to overide input to be vector 3, not really necessary */
/*
protected override MaterialSlot GetInputSlot1()
{
return new MaterialSlot(InputSlot1Id, GetInputSlot1Name(), kInputSlot1ShaderName, SlotType.Input, SlotValueType.Vector3, Vector4.zero);
}
protected override MaterialSlot GetInputSlot2()
{
return new MaterialSlot(InputSlot2Id, GetInputSlot2Name(), kInputSlot2ShaderName, SlotType.Input, SlotValueType.Vector3, Vector4.zero);
}
protected override MaterialSlot GetOutputSlot()
{
return new MaterialSlot(OutputSlotId, GetOutputSlotName(), kOutputSlotShaderName, SlotType.Output, SlotValueType.Vector3, Vector4.zero);
}
*/
public override bool hasPreview { get { return true; } }
public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
{
var outputString = new ShaderGenerator();
switch (m_BlendMode)
{
/* case BlendModesEnum.AddSub:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return 2.0 * arg1 + arg2 - 1.0;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
*/
case BlendModesEnum.Burn:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return 1.0 - (1.0 - arg2)/arg1;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Darken:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return min(arg2,arg1);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Difference:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return abs(arg2-arg1);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Dodge:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return arg2 / (1.0 - arg1);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Divide:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return arg2 / (arg1 + 0.000000000001);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Exclusion:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
// outputString.AddShaderChunk("return arg2 + arg1 - (" + precision + "3(2.0,2.0,2.0)*arg2*arg1);", false);
outputString.AddShaderChunk("return arg2 + arg1 - (2.0 *arg2*arg1);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.HardLight:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk(precision + outputDimension + " result1 = 1.0 - 2.0 * (1.0 - arg1) * (1.0 - arg2);", false);
outputString.AddShaderChunk(precision + outputDimension + " result2 = 2.0 * arg1 * arg2;", false);
outputString.AddShaderChunk(precision + outputDimension + " zeroOrOne = step(arg1, 0.5);", false);
outputString.AddShaderChunk("return result2 * zeroOrOne + (1 - zeroOrOne) * result1;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.HardMix:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return step(1-arg1, arg2);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Lighten:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return max(arg2,arg1);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.LinearBurn:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return arg1 + arg2 - 1.0;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.LinearDodge:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return arg1 + arg2;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.LinearLight_AddSub:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return arg2 + 2.0 * arg1 - 1.0;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Multiply:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return arg1 * arg2;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Negation:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return 1.0 - abs(1.0 - arg2 - arg1);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Overlay:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk(precision + outputDimension + " result1 = 1.0 - 2.0 * (1.0 - arg1) * (1.0 - arg2);", false);
outputString.AddShaderChunk(precision + outputDimension + " result2 = 2.0 * arg1 * arg2;", false);
outputString.AddShaderChunk(precision + outputDimension + " zeroOrOne = step(arg2, 0.5);", false);
outputString.AddShaderChunk("return result2 * zeroOrOne + (1 - zeroOrOne) * result1;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.PinLight:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk(precision + outputDimension + " check = step (0.5, arg1);", false);
outputString.AddShaderChunk(precision + outputDimension + " result = check * max(2.0*(arg1 - 0.5), arg2);", false);
outputString.AddShaderChunk("return result += (1.0 - check) * min(2.0 * arg1,arg2);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Screen:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return 1.0 - (1.0-arg2) * (1.0 - arg1);", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.SoftLight:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk(precision + outputDimension + " result1= 2.0 * arg2 * arg1 + arg2*arg2 - 2.0 * arg2*arg2*arg1;", false);
outputString.AddShaderChunk(precision + outputDimension + " result2= 2.0* sqrt(arg2) * arg1 - sqrt(arg2) + 2.0 * arg2 - 2.0 * arg2*arg1;", false);
outputString.AddShaderChunk(precision + outputDimension + " zeroOrOne = step(0.5, arg1);", false);
outputString.AddShaderChunk("return result2 * zeroOrOne + (1 - zeroOrOne) * result1;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.Substract:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk("return arg2 - arg1;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
case BlendModesEnum.VividLight:
outputString.AddShaderChunk(GetFunctionPrototype("arg1", "arg2"), false);
outputString.AddShaderChunk("{", false);
outputString.Indent();
outputString.AddShaderChunk(precision + outputDimension + " result1= 1.0-(1.0-arg2)/(2.0*arg1);", false);
outputString.AddShaderChunk(precision + outputDimension + " result2= arg2/(2.0*(1.0-arg1));", false);
outputString.AddShaderChunk(precision + outputDimension + " zeroOrOne = step(0.5, arg1);", false);
outputString.AddShaderChunk("return result2 * zeroOrOne + (1 - zeroOrOne) * result1;", false);
outputString.Deindent();
outputString.AddShaderChunk("}", false);
break;
}
visitor.AddShaderChunk(outputString.GetShaderString(0), true);
}
}
}