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75 lines
2.2 KiB
75 lines
2.2 KiB
Shader "VRTK/VRTK_TunnelEffect"
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{
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Properties
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{
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_Color("Color Tint", Color) = (0,0,0,1)
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_MainTex ("Texture", 2D) = "white" {}
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_AngularVelocity ("Angular Velocity", Float) = 0
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_FeatherSize ("Feather Size", Float) = 0.1
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_SecondarySkyBox("Cage SkyBox", Cube) = "" {}
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}
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SubShader
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{
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// No culling or depth
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Cull Off ZWrite Off ZTest Always
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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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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 = v.uv;
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return o;
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}
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sampler2D _MainTex;
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float4 _MainTex_ST;
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float _AngularVelocity;
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float _FeatherSize;
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half4 _Color;
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samplerCUBE _SecondarySkyBox;
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float4x4 _EyeProjection[2];
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float4x4 _EyeToWorld[2];
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fixed4 frag (v2f i) : SV_Target
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{
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float2 uv = UnityStereoScreenSpaceUVAdjust(i.uv, _MainTex_ST);
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fixed4 col = tex2D(_MainTex, uv);
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float2 coords = (i.uv - 0.5) * 2;
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float4 viewPos = mul(_EyeProjection[unity_StereoEyeIndex], float4(coords, 0, 1));
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viewPos.xyz /= viewPos.w;
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float radius = length(viewPos.xy / (_ScreenParams.xy / 2)) / 2;
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float avMin = (1 - _AngularVelocity) - _FeatherSize;
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float avMax = (1 - _AngularVelocity) + _FeatherSize;
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float t = saturate((radius - avMin) / (avMax - avMin));
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float3 rayDir = mul(_EyeToWorld[unity_StereoEyeIndex], viewPos).xyz;
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half4 skyData = texCUBE(_SecondarySkyBox, normalize(rayDir));
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return lerp(col, skyData * _Color, t);
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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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