67 lines
1.9 KiB
Plaintext
67 lines
1.9 KiB
Plaintext
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// Shaders/AdvancedBlend.shader
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Shader "Custom/AdvancedBlend" {
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Properties {
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_MainTex ("Base (RGB)", 2D) = "white" {}
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_BlendTex ("Blend Texture", 2D) = "white" {}
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_Position ("Blend Position", Vector) = (0,0,0,0)
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_BlendMode ("Blend Mode", Float) = 0
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}
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SubShader {
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Tags { "RenderType"="Opaque" }
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LOD 100
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Pass {
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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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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f {
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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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sampler2D _BlendTex;
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float2 _Position;
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float _BlendMode;
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v2f vert (appdata v) {
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = v.uv;
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return o;
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}
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fixed4 frag (v2f i) : SV_Target {
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fixed4 base = tex2D(_MainTex, i.uv);
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// 计算混合纹理坐标
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float2 blendUV = i.uv - _Position / _ScreenParams.xy;
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if (any(blendUV < 0) || any(blendUV > 1))
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return base;
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fixed4 blend = tex2D(_BlendTex, blendUV);
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// 混合模式选择
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switch ((int)_BlendMode) {
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case 0: // Alpha Blend
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return lerp(base, blend, blend.a);
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case 1: // Multiply
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return base * blend;
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case 2: // Screen
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return 1 - (1 - base) * (1 - blend);
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default:
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return base;
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}
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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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