drewcassidy/KSP-Conformal-Decals
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Shader cleanup and use KSP's Blinn Phong BRDF

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This commit is contained in:
Andrew Cassidy
2020-05-24 10:46:50 -07:00
parent 0444b33613
commit 03b647560e
3 changed files with 25 additions and 116 deletions
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66
Assets/Shaders/DecalsCommon.cginc
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@ -6,7 +6,7 @@ struct DecalSurfaceInput
float4 uv_decal;
#ifdef DECAL_BASE_NORMAL
float2 uv_base;
#endif
#endif //DECAL_BASE_NORMAL
float3 normal;
float3 viewDir;
};
@ -17,7 +17,7 @@ struct appdata_decal
float3 normal : NORMAL;
#ifdef DECAL_BASE_NORMAL
float4 texcoord : TEXCOORD0;
#endif
#endif //DECAL_BASE_NORMAL
};
struct v2f
@ -27,13 +27,11 @@ struct v2f
float4 uv_decal : TEXCOORD0;
#ifdef DECAL_BASE_NORMAL
float2 uv_base : TEXCOORD1;
#endif
#endif //DECAL_BASE_NORMAL
float4 tSpace0 : TEXCOORD2;
float4 tSpace1 : TEXCOORD3;
float4 tSpace2 : TEXCOORD4;
#if UNITY_SHOULD_SAMPLE_SH
half3 sh : TEXCOORD5; // SH
#endif
fixed3 vlight : TEXCOORD5;
UNITY_SHADOW_COORDS(6)
};
@ -57,7 +55,7 @@ v2f vert_forward_base(appdata_decal v)
#ifdef DECAL_BASE_NORMAL
o.uv_base = TRANSFORM_TEX(v.texcoord, _BumpMap);
#endif
#endif //DECAL_BASE_NORMAL
float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;
float3 worldNormal = UnityObjectToWorldNormal(v.normal);
@ -69,17 +67,21 @@ v2f vert_forward_base(appdata_decal v)
o.tSpace1 = float4(worldTangent.y, worldBinormal.y, worldNormal.y, worldPos.y);
o.tSpace2 = float4(worldTangent.z, worldBinormal.z, worldNormal.z, worldPos.z);
#if UNITY_SHOULD_SAMPLE_SH && !UNITY_SAMPLE_FULL_SH_PER_PIXEL
o.sh = 0;
// Approximated illumination from non-important point lights
#ifdef VERTEXLIGHT_ON
o.sh += Shade4PointLights (
unity_4LightPosX0, unity_4LightPosY0, unity_4LightPosZ0,
unity_LightColor[0].rgb, unity_LightColor[1].rgb, unity_LightColor[2].rgb, unity_LightColor[3].rgb,
unity_4LightAtten0, worldPos, worldNormal);
#endif
o.sh = ShadeSHPerVertex (worldNormal, o.sh);
#endif
// SH/ambient light
#if UNITY_SHOULD_SAMPLE_SH
float3 shlight = ShadeSH9 (float4(worldNormal,1.0));
o.vlight = shlight;
#else
o.vlight = 0.0;
#endif // UNITY_SHOULD_SAMPLE_SH
// vertex light
#ifdef VERTEXLIGHT_ON
o.vlight += Shade4PointLights (
unity_4LightPosX0, unity_4LightPosY0, unity_4LightPosZ0,
unity_LightColor[0].rgb, unity_LightColor[1].rgb, unity_LightColor[2].rgb, unity_LightColor[3].rgb,
unity_4LightAtten0, worldPos, worldNormal );
#endif // VERTEXLIGHT_ON
UNITY_TRANSFER_LIGHTING(o, 0.0); // pass shadow and, possibly, light cookie coordinates to pixel shader
@ -95,7 +97,6 @@ fixed4 frag_forward_base(v2f IN) : SV_Target
UNITY_EXTRACT_TBN(IN);
float3 worldPos = float3(IN.tSpace0.w, IN.tSpace1.w, IN.tSpace2.w);
float3 worldTan = float3(IN.tSpace0.x, IN.tSpace1.x, IN.tSpace2.x);
#ifndef USING_DIRECTIONAL_LIGHT
@ -134,34 +135,11 @@ fixed4 frag_forward_base(v2f IN) : SV_Target
worldN = normalize(worldN);
o.Normal = worldN;
// Setup lighting environment
UnityGI gi;
UNITY_INITIALIZE_OUTPUT(UnityGI, gi);
gi.indirect.diffuse = 0;
gi.indirect.specular = 0;
gi.light.color = _LightColor0.rgb;
gi.light.dir = lightDir;
// Call GI (lightmaps/SH/reflections) lighting function
UnityGIInput giInput;
UNITY_INITIALIZE_OUTPUT(UnityGIInput, giInput);
giInput.light = gi.light;
giInput.worldPos = worldPos;
giInput.worldViewDir = worldViewDir;
giInput.atten = atten;
giInput.lightmapUV = 0.0;
#if UNITY_SHOULD_SAMPLE_SH && !UNITY_SAMPLE_FULL_SH_PER_PIXEL
giInput.ambient = IN.sh;
#else
giInput.ambient.rgb = 0.0;
#endif
LightingBlinnPhong_GI(o, giInput, gi);
//KSP lighting function
//c += LightingBlinnPhongSmooth(o, lightDir, viewDir, atten);
c += LightingBlinnPhong(o, worldViewDir, gi);
c += LightingBlinnPhongSmooth(o, lightDir, viewDir, atten);
c.rgb += o.Emission;
c.rgb += o.Albedo * IN.vlight;
return c;
}