generated from raccoon/vrchat-project-template
84 lines
2.9 KiB
Plaintext
84 lines
2.9 KiB
Plaintext
// Original code from https://gist.github.com/josephbk117/a43f5335cea9b3e12a44f196dc81f30f
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Shader "Custom/InteriorImposterShader"
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{
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Properties
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{
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}
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SubShader
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{
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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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#include "Lighting.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float3 normal : NORMAL;
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};
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struct v2f
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{
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float3 worldPos : TEXCOORD0;
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float3 worldNormal : TEXCOORD1;
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float4 pos : 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.pos = UnityObjectToClipPos(v.vertex);
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o.worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
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o.worldNormal = UnityObjectToWorldNormal(v.normal);
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return o;
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}
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// Snippet from https://github.com/frostbone25/Unity-Improved-Box-Projected-Reflections/blob/main/ImprovedBoxProjectedReflections/Assets/Shaders/ImprovedBoxProjectedReflections.shader#L80
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float3 BoxProjectReflectionDir(float3 worldPos, float3 worldRefl, out float distanceToHitPoint)
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{
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float4 probePos = unity_SpecCube0_ProbePosition;
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float4 boxMin = unity_SpecCube0_BoxMin;
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float4 boxMax = unity_SpecCube0_BoxMax;
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// Do we have a valid reflection probe?
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if (probePos.w > 0.0)
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{
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float3 nrdir = normalize(worldRefl);
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float3 rbmax = (boxMax.xyz - worldPos) / nrdir;
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float3 rbmin = (boxMin.xyz - worldPos) / nrdir;
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float3 rbminmax = (nrdir > 0.0f) ? rbmax : rbmin;
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distanceToHitPoint = min(min(rbminmax.x, rbminmax.y), rbminmax.z);
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worldPos -= probePos.xyz;
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worldRefl = worldPos + nrdir * distanceToHitPoint;
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}
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return worldRefl;
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}
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fixed4 frag (v2f i) : SV_Target
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{
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float mipLevel = 0.0;
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half3 worldViewDir = normalize(UnityWorldSpaceViewDir(i.worldPos)); // Direction of ray from the camera towards the object surface
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float3 boxProjection = BoxProjectReflectionDir(i.worldPos, -worldViewDir, mipLevel);
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mipLevel = (mipLevel / UNITY_SPECCUBE_LOD_STEPS) * perceptualRoughnessToMipmapLevel(0.0); // Fixing incorrect mipmap level of cubemap texture
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half4 skyData = UNITY_SAMPLE_TEXCUBE_LOD(unity_SpecCube0, boxProjection, mipLevel);
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half3 skyColor = DecodeHDR(skyData, unity_SpecCube0_HDR); // This is done becasue the cubemap is stored HDR
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return half4(skyColor, 1.0);
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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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