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float4 frag (
#if defined(Geometry)
g2f i
#else
VertexOutput i
#endif
, uint facing : SV_IsFrontFace
) : SV_Target
{
TextureUV t = (TextureUV)0; // Populate UVs
if(_TilingMode != 1) { InitializeTextureUVs(i, t); } else { InitializeTextureUVsMerged(i, t); };
#ifdef UNITY_PASS_SHADOWCASTER
XSLighting o = (XSLighting)0; //Populate Lighting Struct, but only with important shadowcaster stuff!
o.albedo = UNITY_SAMPLE_TEX2D(_MainTex, t.albedoUV) * _Color * lerp(1, float4(i.color.rgb, 1), _VertexColorAlbedo);
o.clipMap = UNITY_SAMPLE_TEX2D_SAMPLER(_ClipMap, _MainTex, t.clipMapUV);
o.dissolveMask = UNITY_SAMPLE_TEX2D_SAMPLER(_DissolveTexture, _MainTex, t.dissolveUV);
o.worldPos = i.worldPos;
o.screenUV = calcScreenUVs(i.screenPos);
o.screenPos = i.screenPos;
o.objPos = i.objPos;
float4 outCol = 0;
calcAlpha(o);
calcDissolve(o, outCol);
SHADOW_CASTER_FRAGMENT(i);
#else
UNITY_LIGHT_ATTENUATION(attenuation, i, i.worldPos.xyz);
// fix for rare bug where light atten is 0 when there is no directional light in the scene
#ifdef UNITY_PASS_FORWARDBASE
if(all(_LightColor0.rgb == 0.0))
{
attenuation = 1.0;
}
#endif
#if defined(DIRECTIONAL)
half sharp = _ShadowSharpness * 0.5;
attenuation = smoothstep(sharp, 1-sharp, attenuation); //Converge at the center line
#endif
bool face = facing > 0; // True if on front face, False if on back face
if (!face) // Invert Normals based on face
{
if(i.color.a > 0.99) { discard; }//Discard outlines front face always. This way cull off and outlines can be enabled.
i.ntb[0] = -i.ntb[0];
i.ntb[1] = -i.ntb[1];
i.ntb[2] = -i.ntb[2];
}
XSLighting o = (XSLighting)0; //Populate Lighting Struct
o.albedo = UNITY_SAMPLE_TEX2D(_MainTex, t.albedoUV) * _Color * lerp(1, float4(i.color.rgb, 1), _VertexColorAlbedo);
o.specularMap = UNITY_SAMPLE_TEX2D_SAMPLER(_SpecularMap, _MainTex, t.specularMapUV);
o.metallicGlossMap = UNITY_SAMPLE_TEX2D_SAMPLER(_MetallicGlossMap, _MainTex, t.metallicGlossMapUV);
o.detailMask = UNITY_SAMPLE_TEX2D_SAMPLER(_DetailMask, _MainTex, t.detailMaskUV);
o.normalMap = UNITY_SAMPLE_TEX2D_SAMPLER(_BumpMap, _MainTex, t.normalMapUV);
o.detailNormal = UNITY_SAMPLE_TEX2D_SAMPLER(_DetailNormalMap, _MainTex, t.detailNormalUV);
o.thickness = UNITY_SAMPLE_TEX2D_SAMPLER(_ThicknessMap, _MainTex, t.thicknessMapUV);
o.occlusion = tex2D(_OcclusionMap, t.occlusionUV);
o.reflectivityMask = UNITY_SAMPLE_TEX2D_SAMPLER(_ReflectivityMask, _MainTex, t.reflectivityMaskUV) * _Reflectivity;
o.emissionMap = UNITY_SAMPLE_TEX2D_SAMPLER(_EmissionMap, _MainTex, t.emissionMapUV) * _EmissionColor;
o.rampMask = UNITY_SAMPLE_TEX2D_SAMPLER(_RampSelectionMask, _MainTex, i.uv); // This texture doesn't need to ever be on a second uv channel, and doesn't need tiling, convince me otherwise.
o.hsvMask = UNITY_SAMPLE_TEX2D_SAMPLER(_HSVMask, _MainTex, t.albedoUV);
o.clipMap = UNITY_SAMPLE_TEX2D_SAMPLER(_ClipMap, _MainTex, t.clipMapUV);
o.dissolveMask = UNITY_SAMPLE_TEX2D_SAMPLER(_DissolveTexture, _MainTex, t.dissolveUV);
o.diffuseColor = o.albedo.rgb; //Store this to separate the texture color and diffuse color for later.
o.attenuation = attenuation;
o.normal = i.ntb[0];
o.tangent = i.ntb[1];
o.bitangent = i.ntb[2];
o.worldPos = i.worldPos;
o.color = i.color.rgb;
o.isOutline = i.color.a;
o.screenUV = calcScreenUVs(i.screenPos);
o.screenPos = i.screenPos;
o.objPos = i.objPos;
float4 col = BRDF_XSLighting(o);
calcAlpha(o);
calcDissolve(o, col);
UNITY_APPLY_FOG(i.fogCoord, col);
return float4(col.rgb, o.alpha);
#endif
}
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