143 lines
4.6 KiB
Plaintext
143 lines
4.6 KiB
Plaintext
Shader "BriarQueen/UI/Row Highlight"
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{
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Properties
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{
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[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
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_Color ("Tint", Color) = (1, 1, 1, 1)
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_HighlightColor ("Highlight Color", Color) = (0, 0, 0, 1)
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_Intensity ("Intensity", Range(0, 1)) = 0.6
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_HorizontalWidth ("Horizontal Width", Range(0.1, 1)) = 0.7
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_VerticalWidth ("Vertical Width", Range(0.1, 1)) = 0.7
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_CentreDarkness ("Centre Darkness", Range(1, 4)) = 2.0
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_StencilComp ("Stencil Comparison", Float) = 8
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_Stencil ("Stencil ID", Float) = 0
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_StencilOp ("Stencil Operation", Float) = 0
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_StencilWriteMask ("Stencil Write Mask", Float) = 255
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_StencilReadMask ("Stencil Read Mask", Float) = 255
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_ColorMask ("Color Mask", Float) = 15
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[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0
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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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"Queue" = "Transparent"
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"IgnoreProjector" = "True"
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"RenderType" = "Transparent"
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"PreviewType" = "Plane"
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"CanUseSpriteAtlas" = "True"
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}
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Stencil
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{
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Ref [_Stencil]
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Comp [_StencilComp]
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Pass [_StencilOp]
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ReadMask [_StencilReadMask]
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WriteMask [_StencilWriteMask]
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}
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Cull Off
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Lighting Off
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ZWrite Off
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ZTest [unity_GUIZTestMode]
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Blend SrcAlpha OneMinusSrcAlpha
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ColorMask [_ColorMask]
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Pass
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{
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Name "Default"
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CGPROGRAM
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#pragma vertex Vert
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#pragma fragment Frag
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#pragma target 2.0
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#include "UnityCG.cginc"
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#include "UnityUI.cginc"
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#pragma multi_compile_local _ UNITY_UI_CLIP_RECT
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#pragma multi_compile_local _ UNITY_UI_ALPHACLIP
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struct AppData
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{
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float4 vertex : POSITION;
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float4 color : COLOR;
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float2 texcoord : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct Varyings
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{
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float4 vertex : SV_POSITION;
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fixed4 color : COLOR;
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float2 uv : TEXCOORD0;
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float4 worldPosition : TEXCOORD1;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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sampler2D _MainTex;
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fixed4 _Color;
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fixed4 _TextureSampleAdd;
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float4 _ClipRect;
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fixed4 _HighlightColor;
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float _Intensity;
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float _HorizontalWidth;
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float _VerticalWidth;
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float _CentreDarkness;
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Varyings Vert(AppData input)
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{
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Varyings output;
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UNITY_SETUP_INSTANCE_ID(input);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
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output.worldPosition = input.vertex;
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output.vertex = UnityObjectToClipPos(input.vertex);
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output.uv = input.texcoord;
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output.color = input.color * _Color;
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return output;
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}
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fixed4 Frag(Varyings input) : SV_Target
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{
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#ifdef UNITY_UI_CLIP_RECT
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float clipAlpha = UnityGet2DClipping(input.worldPosition.xy, _ClipRect);
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#else
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float clipAlpha = 1.0;
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#endif
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float2 uv = input.uv * 2.0 - 1.0;
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// smoothstep reaches exactly 0 at _Width — no rect boundary visible
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float h = 1.0 - smoothstep(0.0, _HorizontalWidth, abs(uv.x));
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float v = 1.0 - smoothstep(0.0, _VerticalWidth, abs(uv.y));
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float mask = h * v;
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// Darker in the centre, lighter toward the fade edge
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float radial = length(float2(abs(uv.x) / _HorizontalWidth,
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abs(uv.y) / _VerticalWidth));
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float centreBoost = pow(saturate(1.0 - radial), _CentreDarkness);
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float brightness = lerp(1.0, 0.25, centreBoost);
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fixed4 result;
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result.rgb = _HighlightColor.rgb * brightness;
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// Deliberately not multiplying by sprite or vertex alpha —
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// transparent image or color has no effect on the gradient
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result.a = mask * _Intensity * clipAlpha;
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#ifdef UNITY_UI_ALPHACLIP
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clip(result.a - 0.001);
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#endif
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return result;
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}
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ENDCG
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}
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}
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} |