klemek
101 lines
2.2 KiB
GLSL
Executable File
101 lines
2.2 KiB
GLSL
Executable File
Shader "Shaders101/Colored UV"
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{
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Properties
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{
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_Width("Width", Range(0.00001,0.05)) = 0.001
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_SmoothWidth("Smooth Width", Range(0.00001,0.05)) = 0.0002
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_Size("Object Size", Range(0.01,1000)) = 100
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_MiddlePoint("Middle Point", Range(0, 1)) = 0.6
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_Background("Background Color", Color) = (.2, .2, .2, 1)
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_Foreground("Foreground Color", Color) = (.5, .5, .5, 1)
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_Step("Step", Int) = 5
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_MainTex("Texture", 2D) = "white" {}
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}
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SubShader
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{
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Tags
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{
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"PreviewType" = "Plane"
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}
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f
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{
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float4 vertex : SV_POSITION;
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float2 uv : TEXCOORD0;
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float4 scrPos : TEXCOORD1;
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};
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sampler2D _MainTex;
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float _Width;
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float _SmoothWidth;
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float _Size;
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float4 _Background;
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float _MiddlePoint;
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float4 _Foreground;
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int _Step;
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v2f vert(appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.scrPos = ComputeScreenPos(v.vertex);
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o.uv = v.uv;
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return o;
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}
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float grid(float2 uv, float w, float s)
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{
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return clamp(1
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- smoothstep(w - _SmoothWidth, w + _SmoothWidth, fmod(uv.x + w * .5, s)) + 1
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- smoothstep(w - _SmoothWidth, w + _SmoothWidth, fmod(uv.y + w * .5, s)), 0, 1);
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}
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float4 frag(v2f i) : SV_Target
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{
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float d = length(ObjSpaceViewDir(i.scrPos));
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float w = d * _Width;
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float k = log(d) / log(_Step);
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float k0 = floor(k);
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float x = d / pow(_Step, k0);
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float s1 = pow(_Step, k0) * .1 / _Step;
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float c1 = smoothstep(0, 1, _MiddlePoint * (_Step - x) / (_Step - 1));
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float s2 = s1 * _Step;
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float c2 = smoothstep(0, 1, (1 - _MiddlePoint) * (_Step - x) / (_Step - 1) + _MiddlePoint);
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float s3 = s2 * _Step;
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i.uv *= _Size;
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float grid1 = grid(i.uv, w, s1);
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float grid2 = grid(i.uv, w, s2);
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float grid3 = grid(i.uv, w, s3);
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grid2 = clamp(grid2 - grid3, 0, 1);
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grid1 = clamp(grid1 - grid2, 0, 1);
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float a = (grid1 * c1 + grid2 * c2 + grid3);
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return (1 - a) * _Background + a * _Foreground;
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}
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ENDCG
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}
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}
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} |