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@ -79,6 +79,22 @@ inline void decalClipAlpha(float alpha) {
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#endif
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}
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// modifed version of the KSP BlinnPhong because it does some weird things
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inline fixed4 LightingBlinnPhongDecal(SurfaceOutput s, fixed3 lightDir, half3 viewDir, fixed atten)
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{
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s.Normal = normalize(s.Normal);
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half3 h = normalize(lightDir + viewDir);
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fixed diff = max(0, dot(s.Normal, lightDir));
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float nh = max(0, dot(s.Normal, h));
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float spec = pow(nh, s.Specular*128.0) * s.Gloss;
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fixed4 c = 0;
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c.rgb = (s.Albedo * _LightColor0.rgb * diff + _LightColor0.rgb * _SpecColor.rgb * spec) * (atten);
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return c;
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}
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// declare surf function,
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// this must be defined in any shader using this cginc
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void surf (DecalSurfaceInput IN, inout SurfaceOutput o);
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@ -221,7 +237,9 @@ fixed4 frag_forward(v2f IN) : SV_Target
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surf(i, o);
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#ifdef DECAL_PREVIEW
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o.Albedo = lerp(_Color.rgb,o.Albedo, o.Alpha);
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if (any(IN.uv_decal > 1) || any(IN.uv_decal < 0)) o.Alpha = 0;
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o.Albedo = lerp(_Color.rgb, o.Albedo, o.Alpha);
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o.Normal = lerp(float3(0,0,1), o.Normal, o.Alpha);
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o.Gloss = lerp(_Color.a, o.Gloss, o.Alpha);
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o.Emission = lerp(0, o.Emission, o.Alpha);
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@ -239,21 +257,20 @@ fixed4 frag_forward(v2f IN) : SV_Target
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WorldNormal = normalize(WorldNormal);
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o.Normal = WorldNormal;
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//KSP lighting function
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c += LightingBlinnPhongSmooth(o, lightDir, worldViewDir, atten);
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//call modified KSP lighting function
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c += LightingBlinnPhongDecal(o, lightDir, worldViewDir, atten);
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// Forward base emission and ambient/vertex lighting
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#ifdef UNITY_PASS_FORWARDBASE
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c.rgb += o.Emission;
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c.rgb += o.Albedo * IN.vlight;
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c.a = saturate(c.a);
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c.a = o.Alpha;
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#endif //UNITY_PASS_FORWARDBASE
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// Forward add multiply by alpha
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#ifdef UNITY_PASS_FORWARDADD
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c.rgb *= c.a;
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c.a = 0.0;
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#endif
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c.rgb *= o.Alpha;
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#endif
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return c;
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}
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