158 lines
3.8 KiB
GLSL
158 lines
3.8 KiB
GLSL
Shader "UI/GuideMask"
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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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_Blur("边缘虚化的范围", Range(1,1000)) = 100
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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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//中心
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_Origin("Circle",Vector) = (0,0,0,0)
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//裁剪方式 0圆形 1矩形 2矩形点击穿透
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_MaskType("Type",Float) = 0
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//是否允许点击穿透
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_AllowClickThrough("Allow Click Through", 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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struct appdata_t
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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 v2f
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{
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float4 vertex : SV_POSITION;
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fixed4 color : COLOR;
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float2 texcoord : TEXCOORD0;
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float4 worldPosition : TEXCOORD1;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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fixed4 _Color;
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fixed4 _TextureSampleAdd;
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float4 _ClipRect;
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float4 _Origin;
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float _MaskType;
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float _Blur;
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float _AllowClickThrough;
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v2f vert(appdata_t IN)
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{
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v2f OUT;
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UNITY_SETUP_INSTANCE_ID(IN);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
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OUT.worldPosition = IN.vertex;
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OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);
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OUT.texcoord = IN.texcoord;
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OUT.color = IN.color * _Color;
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return OUT;
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}
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sampler2D _MainTex;
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fixed4 frag(v2f IN) : SV_Target
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{
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half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;
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if (_MaskType == 0) {
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//if (distance(IN.worldPosition.xy, _Origin.xy) <= _Origin.z)
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//{
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// color.a = 0;
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//}
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float dis = distance(IN.worldPosition.xy, _Origin.xy);
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// 检查是否启用了点击穿透
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if (_AllowClickThrough > 0.5) {
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// 当在洞区域内时，设置alpha为0以允许点击穿透
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if (dis <= _Origin.z) {
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// 过滤掉距离小于半径的片元 - 完全透明
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discard; // 使用discard来让该像素不渲染，允许点击穿透
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}
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} else {
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// 原始逻辑 - 只是视觉上透明但不允许点击穿透
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//过滤掉距离小于（半径-过渡范围）的片元
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clip(dis - (_Origin.z - _Blur));
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//优化if条件判断，如果距离小于半径则执行下一步，等于if(dis < _Radius)
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fixed tmp = step(dis, _Origin.z);
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//计算过渡范围内的alpha值
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color.a *= (1 - tmp) + tmp * (dis - (_Origin.z - _Blur)) / _Blur;
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}
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}
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else if (_MaskType == 1) {
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//UnityGet2DClipping这个函数实现了判断2D空间中的一点是否在一个矩形区域中
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if (UnityGet2DClipping(IN.worldPosition.xy, _Origin))
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{
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color.a = 0;
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}
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}
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else if (_MaskType == 2)
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{
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if (UnityGet2DClipping(IN.worldPosition.xy, _Origin))
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{
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// 检查是否启用了点击穿透
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if (_AllowClickThrough > 0.5) {
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// 使用discard来让该像素不渲染，允许点击穿透
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discard;
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} else {
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color.a = 0;
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#ifdef UNITY_UI_CLIP_RECT
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color.a *= UnityGet2DClipping(IN.worldPosition.xy, _Origin);
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#endif
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}
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}
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}
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return color;
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}
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ENDCG
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}
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}
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} |