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- Shader "VRTK/VRTK_TunnelEffect"
- {
- Properties
- {
- _Color("Color Tint", Color) = (0,0,0,1)
- _MainTex ("Texture", 2D) = "white" {}
- _AngularVelocity ("Angular Velocity", Float) = 0
- _FeatherSize ("Feather Size", Float) = 0.1
- _SecondarySkyBox("Cage SkyBox", Cube) = "" {}
- }
-
- SubShader
- {
- // No culling or depth
- Cull Off ZWrite Off ZTest Always
-
- Pass
- {
- CGPROGRAM
- #pragma vertex vert
- #pragma fragment frag
-
- #include "UnityCG.cginc"
-
- struct appdata
- {
- float4 vertex : POSITION;
- float2 uv : TEXCOORD0;
- };
-
- struct v2f
- {
- float2 uv : TEXCOORD0;
- float4 vertex : SV_POSITION;
- };
-
- v2f vert (appdata v)
- {
- v2f o;
- o.vertex = UnityObjectToClipPos(v.vertex);
- o.uv = v.uv;
- return o;
- }
-
- sampler2D _MainTex;
- float4 _MainTex_ST;
- float _AngularVelocity;
- float _FeatherSize;
- half4 _Color;
- samplerCUBE _SecondarySkyBox;
- float4x4 _EyeProjection[2];
- float4x4 _EyeToWorld[2];
-
- fixed4 frag (v2f i) : SV_Target
- {
- float2 uv = UnityStereoScreenSpaceUVAdjust(i.uv, _MainTex_ST);
- fixed4 col = tex2D(_MainTex, uv);
- float2 coords = (i.uv - 0.5) * 2;
- float4 viewPos = mul(_EyeProjection[unity_StereoEyeIndex], float4(coords, 0, 1));
- viewPos.xyz /= viewPos.w;
-
- float radius = length(viewPos.xy / (_ScreenParams.xy / 2)) / 2;
- float avMin = (1 - _AngularVelocity) - _FeatherSize;
- float avMax = (1 - _AngularVelocity) + _FeatherSize;
- float t = saturate((radius - avMin) / (avMax - avMin));
-
- float3 rayDir = mul(_EyeToWorld[unity_StereoEyeIndex], viewPos).xyz;
- half4 skyData = texCUBE(_SecondarySkyBox, normalize(rayDir));
-
- return lerp(col, skyData * _Color, t);
- }
- ENDCG
- }
- }
- }
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