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制作类似 RPG 游戏时,可能会需要显示小地图。小地图的制作一种方式是用另一个摄像机来渲染到一张纹理上,实时显示到UI界面。
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Shader "
UIEx/Default-Mask"
{ Properties { [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {} _Mask ("Mask Texture", 2D) = "white" {} _Color ("Tint", Color) = (1,1,1,1) _StencilComp ("Stencil Comparison", Float) = 8 _Stencil ("Stencil ID", Float) = 0 _StencilOp ("Stencil Operation", Float) = 0 _StencilWriteMask ("Stencil Write Mask", Float) = 255 _StencilReadMask ("Stencil Read Mask", Float) = 255 _ColorMask ("Color Mask", Float) = 15 } SubShader { Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" "CanUseSpriteAtlas"="True" } Stencil { Ref [_Stencil] Comp [_StencilComp] Pass [_StencilOp] ReadMask [_StencilReadMask] WriteMask [_StencilWriteMask] } Cull Off Lighting Off ZWrite Off ZTest [unity_GUIZTestMode] Blend SrcAlpha OneMinusSrcAlpha ColorMask [_ColorMask] Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" struct appdata_t { float4 vertex : POSITION; float4 color : COLOR; float2 texcoord : TEXCOORD0; }; struct v2f { float4 vertex : SV_POSITION; fixed4 color : COLOR; half2 texcoord : TEXCOORD0; }; fixed4 _Color; v2f vert(appdata_t IN) { v2f OUT; OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex); OUT.texcoord = IN.texcoord; #ifdef UNITY_HALF_TEXEL_OFFSET OUT.vertex.xy += (_ScreenParams.zw-1.0)*float2(-1,1); #endif OUT.color = IN.color * _Color; return OUT; } sampler2D _MainTex; sampler2D _Mask; fixed4 frag(v2f IN) : SV_Target { half4 color = tex2D(_MainTex, IN.texcoord) * IN.color; // clip (color.a - 0.01); half4 color2 = tex2D(_Mask, IN.texcoord); return fixed4(color.r, color.g, color.b, color2.r); } ENDCG } } } |
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