68 lines
2.0 KiB
Plaintext
68 lines
2.0 KiB
Plaintext
Shader "Escape Room Engine/Portal"
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{
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Properties
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{
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_LeftTex("Left Eye Texture", 2D) = "" {}
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_RightTex("Right Eye Texture", 2D) = "" {}
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}
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SubShader
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{
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Tags { "RenderType" = "Opaque" "RenderPipeline" = "UniversalPipeline" }
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Pass
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{
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// stencil the portal surface to cut it out from the portal frame
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Stencil
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{
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Ref 1
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Pass replace
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}
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HLSLPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma multi_compile_instancing
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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struct Attributes
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{
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float4 positionOS : POSITION;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct Varyings
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{
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float4 positionHCS : SV_POSITION;
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float4 positionScreen : TEXCOORD0;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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uniform sampler2D _LeftTex, _RightTex;
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Varyings vert(Attributes IN)
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{
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Varyings 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.positionHCS = TransformObjectToHClip(IN.positionOS.xyz);
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// calculate the screen position which is used to map the portal texture onto the portal
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OUT.positionScreen = ComputeScreenPos(OUT.positionHCS);
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return OUT;
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}
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half4 frag(Varyings IN) : SV_Target
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{
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(IN);
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const float2 uv = IN.positionScreen.xy / IN.positionScreen.w;
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// sample from the correct texture depending on the eye rendered
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return unity_StereoEyeIndex == 0 ? tex2D(_LeftTex, uv) : tex2D(_RightTex, uv);
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}
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ENDHLSL
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}
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}
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} |