fbfb8be54d
Added elements to the sector map that visualizes each corporation's territorial influence
113 lines
3.9 KiB
Text
113 lines
3.9 KiB
Text
Shader "Aetheria/Influence"
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{
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Properties
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{
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_MainTex ("Influence Map", 2D) = "white" {}
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_Color1 ("Primary Color", Color) = (1,1,1,1)
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_Color2 ("Secondary Color", Color) = (1,1,1,1)
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_Threshold("Border Threshold", Float) = 0.05
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_FillTiling("Fill Tiling", Float) = 50
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_FillBorderBlend("Fill Border Blend", Float) = .05
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_FillBlend("Fill Blend", Float) = .05
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_PatternBlend("Pattern Blend", Float) = .05
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_PatternOffset("Pattern Offset", Float) = .05
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_FillAlpha("Fill Alpha", Float) = .5
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_FillTilt("Fill Tilt", Range(0,3.14)) = 1
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_Stroke("Stroke Weight", Float) = 2
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_StrokeBlend("Stroke Blend", Float) = .05
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_StrokeTransitionBlend("Stroke Transition Blend", Float) = .05
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}
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SubShader
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{
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Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
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LOD 100
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Blend SrcAlpha OneMinusSrcAlpha
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Cull Off Lighting Off ZWrite Off
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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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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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};
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sampler2D _MainTex;
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float4 _MainTex_ST;
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float4 _MainTex_TexelSize;
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fixed4 _Color1;
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fixed4 _Color2;
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half _FillTiling;
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half _FillBlend;
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half _FillBorderBlend;
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half _FillAlpha;
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half _FillTilt;
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half _PatternBlend;
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half _PatternOffset;
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half _Threshold;
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half _Stroke;
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half _StrokeBlend;
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half _StrokeTransitionBlend;
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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.uv = TRANSFORM_TEX(v.uv, _MainTex);
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return o;
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}
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float2 calcGrad (float2 uv, float me)
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{
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float n = -tex2D(_MainTex, float2(uv.x, uv.y + _MainTex_TexelSize.y)).x;
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float e = -tex2D(_MainTex, float2(uv.x + _MainTex_TexelSize.x, uv.y)).x;
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return float2(e-me,n-me);
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}
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fixed4 frag (v2f i) : SV_Target
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{
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// Sample influence texture
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float influence = tex2D(_MainTex, i.uv).r;
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// Calculate gradient and rate of change of influence
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//float2 grad = calcGrad(i.uv, influence);
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//float diff = length(grad);
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float2 grad = float2(ddx(influence), ddy(influence));
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float diff = length(grad);
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// Tilt determines the vector along which we measure the uv coordinate
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float2 patternDirection = float2(sin(_FillTilt), cos(_FillTilt));
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// Repeat a sine wave along the pattern direction and smoothstep it to interpolate between the two pattern colors
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fixed4 pattern = lerp(_Color1, _Color2, smoothstep(-_PatternBlend, _PatternBlend, _PatternOffset + sin(dot(patternDirection, i.uv * _FillTiling))));
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float4 col = pattern *
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smoothstep(_Threshold, _Threshold + _FillBorderBlend, influence) *
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smoothstep(_Threshold + _FillBlend, _Threshold, influence) *
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_FillAlpha;
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// Draw a line at the threshold
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float isoline = abs(influence - _Threshold) / diff;
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col = smoothstep(0,_Threshold, influence) *
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lerp(col,
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lerp(_Color1, _Color2, smoothstep(_StrokeTransitionBlend*diff, -_StrokeTransitionBlend*diff, influence - _Threshold)),
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smoothstep(_Stroke * (1 + _StrokeBlend), _Stroke, isoline));
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return col;
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}
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ENDCG
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}
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}
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}
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