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
56 行
2.3 KiB
56 行
2.3 KiB
using UnityEngine.Graphing;
|
|
using System.Linq;
|
|
using System.Collections;
|
|
|
|
namespace UnityEngine.MaterialGraph
|
|
{
|
|
[Title("Procedural/Fractal")]
|
|
public class FractalNode : FunctionNInNOut, IGeneratesFunction
|
|
{
|
|
|
|
public FractalNode()
|
|
{
|
|
name = "Fractal";
|
|
AddSlot("UV", "texCoord", Graphing.SlotType.Input, SlotValueType.Vector2, Vector4.zero);
|
|
AddSlot("Pan", "Pan", Graphing.SlotType.Input, SlotValueType.Vector2, new Vector4(0.5f,0,0,0));
|
|
AddSlot("Zoom", "Zoom", Graphing.SlotType.Input, SlotValueType.Vector1, new Vector4(3,0,0,0));
|
|
AddSlot("Aspect", "Aspect", Graphing.SlotType.Input, SlotValueType.Vector1, new Vector4(0.9f,0,0,0));
|
|
|
|
AddSlot("FracResult", "fractalRes", Graphing.SlotType.Output, SlotValueType.Dynamic, Vector4.zero);
|
|
|
|
UpdateNodeAfterDeserialization();
|
|
}
|
|
|
|
protected override string GetFunctionName()
|
|
{
|
|
return "unity_Fractal";
|
|
}
|
|
|
|
public override bool hasPreview
|
|
{
|
|
get { return true; }
|
|
}
|
|
|
|
public void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
|
|
{
|
|
var outputString = new ShaderGenerator();
|
|
outputString.AddShaderChunk(GetFunctionPrototype(), false);
|
|
outputString.AddShaderChunk("{", false);
|
|
outputString.AddShaderChunk("const int Iterations = 128;", false);
|
|
outputString.Indent();
|
|
outputString.AddShaderChunk("float2 c = (texCoord - 0.5) * Zoom * float2(1, Aspect) - Pan;", false);
|
|
outputString.AddShaderChunk("float2 v = 0;", false);
|
|
outputString.AddShaderChunk("for (int n = 0; n < Iterations && dot(v,v) < 4; n++)", false);
|
|
outputString.AddShaderChunk("{", false);
|
|
outputString.Indent();
|
|
outputString.AddShaderChunk("v = float2(v.x * v.x - v.y * v.y, v.x * v.y * 2) + c;", false);
|
|
outputString.Deindent();
|
|
outputString.AddShaderChunk("}", false);
|
|
outputString.Deindent();
|
|
outputString.AddShaderChunk("fractalRes = (dot(v, v) > 4) ? (float)n / (float)Iterations : 0;", false);
|
|
outputString.AddShaderChunk("}", false);
|
|
|
|
visitor.AddShaderChunk(outputString.GetShaderString(0), true);
|
|
}
|
|
}
|
|
}
|