add distorted julia fractal

Assets/julia/JuliaFractal Distorted.mat

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Assets/julia/JuliaFractal.mat

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Assets/julia/JuliaFractal.unity

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Assets/julia/julia_fractal.shader

@@ -1,4 +1,4 @@
-Shader "CrispyPin/JuliaFractalSurface"
+Shader "CrispyPin/JuliaFractal"
 {
 	Properties
 	{

Assets/julia/julia_fractal_distorted.shader

@@ -0,0 +1,74 @@
+Shader "CrispyPin/JuliaFractalDistorted"
+{
+	Properties
+	{
+		[HideInInspector]
+		_MainTex ("Albedo (RGB)", 2D) = "white" {}
+		_MaxIter ("Max iterations", int) = 100
+		_RotSpeed ("Rotation speed", float) = 0.2
+		_RadiusX ("Rotation radius X", Range(0, 2)) = 1
+		_RadiusY ("Rotation radius Y", Range(0, 2)) = 1
+		_Emission ("Emission", Range(0, 1)) = 0.2
+	}
+	SubShader
+	{
+		Tags { "RenderType"="Opaque" }
+		Cull off
+		LOD 200
+
+		CGPROGRAM
+		// Physically based Standard lighting model, and enable shadows on all light types
+		#pragma surface surf Standard fullforwardshadows
+
+		// Use shader model 3.0 target, to get nicer looking lighting
+		#pragma target 3.0
+
+		sampler2D _MainTex;
+
+		struct Input
+		{
+			float2 uv_MainTex;
+			float3 worldPos;
+		};
+
+		half _RadiusX;
+		half _RadiusY;
+		half _Emission;
+		float _RotSpeed;
+		int _MaxIter;
+
+		// // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
+		// // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
+		// // #pragma instancing_options assumeuniformscaling
+		// UNITY_INSTANCING_BUFFER_START(Props)
+		// 	// put more per-instance properties here
+		// UNITY_INSTANCING_BUFFER_END(Props)
+
+		void surf (Input IN, inout SurfaceOutputStandard o)
+		{
+			float2 pos = IN.uv_MainTex * 4 - 2;
+			float angle = _Time.y * _RotSpeed + IN.worldPos.x * IN.worldPos.y;
+			float2 offset = float2(sin(angle) * _RadiusX, cos(angle) * _RadiusY);
+
+			int i = 0;
+			while (pos.x * pos.x + pos.y * pos.y < 4 && i < _MaxIter)
+			{
+				float temp_x = pos.x * pos.x - pos.y * pos.y;
+				pos.y = 2 * pos.x * pos.y + offset.y;
+				pos.x = temp_x + offset.x;
+				i++;
+			}
+
+			fixed3 col =
+				min(
+					pow(
+						fixed3(5, 2, 11) * i / (float)_MaxIter
+					, 2)
+				, 1);
+			o.Albedo = col;
+			o.Emission = col * _Emission;
+		}
+		ENDCG
+	}
+	FallBack "Diffuse"
+}

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