b08423b936
Added new clouds shader with improved raymarching loop Currently only being used in main menu (rest is coming right up!) Removed WWise (it's nice, but all it's doing is throwing exceptions rn since we ain't about to get a license)
100 lines
3.3 KiB
Text
100 lines
3.3 KiB
Text
Shader "Ap/TransparentExample" {
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Properties {
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_Color ("Color", Color) = (1,1,1,1)
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_MainTex ("Albedo (RGB)", 2D) = "white" {}
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_Glossiness ("Smoothness", Range(0,1)) = 0.5
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_Metallic ("Metallic", Range(0,1)) = 0.0
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}
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SubShader {
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Tags {
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"RenderType"="Transparent"
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"Queue" = "Transparent"
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}
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LOD 200
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CGPROGRAM
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//We enable alpha to use transparent
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//Use finalcolor modifier to add ap to final result.
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//And we need custom vs to calculate ap info on every vertex.
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#pragma surface surf Standard fullforwardshadows alpha finalcolor:aerialPerspective vertex:vert
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// Use shader model 3.0 target, to get nicer looking lighting
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#pragma target 3.0
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//Declare these values to use later.
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float3 _SunIrradianceOnAtm;
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sampler3D _CameraVolumeTransmittance;
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sampler3D _CameraVolumeScattering;
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float3 GetTransmittanceWithCameraVolume(float3 uvw) {
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return tex3Dlod(_CameraVolumeTransmittance, float4(uvw, 0.0f)).rgb;
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}
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float3 GetScatteringWithCameraVolume(float3 uvw) {
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return tex3Dlod(_CameraVolumeScattering, float4(uvw, 0.0f)).rgb;
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}
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struct Input {
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float2 uv_MainTex;
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//Add these two to interpolate. Sample them from 3d volume in vertex shader.
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float3 ap_transmittance;
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float3 ap_scattering;
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};
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void vert(inout appdata_full v, out Input o) {
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UNITY_INITIALIZE_OUTPUT(Input, o);
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//Get uv using clip pos.
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float4 hpos = UnityObjectToClipPos(v.vertex);
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float3 ap_volume_uvw = float3(hpos.xy / hpos.w, 0.0f);
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ap_volume_uvw.xy = (ap_volume_uvw + 1.0f) / 2.0f;
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//Get w using view pos.
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float3 view_pos = UnityObjectToViewPos(v.vertex);
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view_pos.z *= -1;
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ap_volume_uvw.z = (view_pos.z - _ProjectionParams.y) / (_ProjectionParams.z - _ProjectionParams.y);
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//Set them to output.
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o.ap_transmittance = GetTransmittanceWithCameraVolume(ap_volume_uvw);
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o.ap_scattering = GetScatteringWithCameraVolume(ap_volume_uvw);
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}
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void aerialPerspective(Input IN, SurfaceOutputStandard o, inout fixed4 color)
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{
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//Edit final color using following formular.
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color.xyz = color.xyz * IN.ap_transmittance + color.a * IN.ap_scattering * _SunIrradianceOnAtm;
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//I'm not pretty familiar with how Unity deal with Transparent and alpha, but it seems to be correct to mult scattering with color.a
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}
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//========================================================================
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//Following are default standard shader setup. Nothing changed.
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//========================================================================
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sampler2D _MainTex;
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half _Glossiness;
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half _Metallic;
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fixed4 _Color;
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// Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
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// See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
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// #pragma instancing_options assumeuniformscaling
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UNITY_INSTANCING_BUFFER_START(Props)
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// put more per-instance properties here
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UNITY_INSTANCING_BUFFER_END(Props)
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void surf (Input IN, inout SurfaceOutputStandard o) {
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// Albedo comes from a texture tinted by color
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fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
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o.Albedo = c.rgb;
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// Metallic and smoothness come from slider variables
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o.Metallic = _Metallic;
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o.Smoothness = _Glossiness;
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o.Alpha = c.a;
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}
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ENDCG
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}
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FallBack "Diffuse"
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}
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