117 lines
3.7 KiB
HLSL
117 lines
3.7 KiB
HLSL
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#ifndef TOONSKETCH_LIGHTING_INCLUDED
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#define TOONSKETCH_LIGHTING_INCLUDED
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inline TS_LightingData TS_InitLightingData(FragmentCommonData s, UnityLight light, UnityIndirect indirect, half atten, half2 uv)
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{
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TS_LightingData l;
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UNITY_INITIALIZE_OUTPUT(TS_LightingData, l);
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l.light = light;
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l.indirect = indirect;
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l.uv = uv;
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l.normal = Unity_SafeNormalize(s.normalWorld);
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#ifdef _TS_BUMPMAP_ON
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float3 bump = UnpackScaleNormal(tex2D(_BumpMap, uv), _BumpScale);
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l.normal = BlendNormals(l.normal, bump);
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#endif
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return l;
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}
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TS_LightingData TS_CalculateLighting(inout FragmentCommonData s, UnityLight light, UnityIndirect indirect, half atten, half2 uv)
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{
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TS_LightingData l = TS_InitLightingData(s, light, indirect, atten, uv);
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// Surface
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half perceptualRoughness = SmoothnessToPerceptualRoughness(s.smoothness);
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half roughness = PerceptualRoughnessToRoughness(perceptualRoughness);
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#ifdef UNITY_COLORSPACE_GAMMA
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half surfaceReduction = 0.28;
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#else
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half surfaceReduction = (0.6 - 0.08 * perceptualRoughness);
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#endif
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surfaceReduction = 1.0 - roughness * perceptualRoughness * surfaceReduction;
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half grazingTerm = saturate(s.smoothness + (1.0 - s.oneMinusReflectivity));
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float3 halfDir = Unity_SafeNormalize(float3(l.light.dir) + -s.eyeVec);
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float nh = DotClamped(l.normal, halfDir);
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half nv = abs(DotClamped(l.normal, -s.eyeVec));
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float lh = DotClamped(l.light.dir, halfDir);
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// Ambient
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#ifdef _TS_IGNOREINDIRECT_ON
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l.ambient = 0;
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#else
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l.ambientDiff = Luminance(l.indirect.diffuse);
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if (_Style == 0)
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l.ambientDiff = l.ambientDiff * 0.5 + 0.5;
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#ifdef _TS_SPECULAR_ON
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l.ambientSpec = SpecularStrength(l.indirect.specular);
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l.ambientSpec = surfaceReduction * l.ambientSpec * FresnelLerpFast(1, grazingTerm, nv);
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l.ambientSpec = smoothstep(_SpecularThreshold - _SpecularCutoff * 0.5, _SpecularThreshold + _SpecularCutoff * 0.5, l.ambientSpec);
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#else
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l.ambientSpec = 0;
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#endif
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l.ambient = (s.diffColor + s.specColor * l.indirect.specular * l.ambientSpec) * l.indirect.diffuse * TS_GetRamp(l.ambientDiff);
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#endif
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// Diffuse
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l.diffuse = DotClamped(l.normal, l.light.dir);
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if (_Style == 0)
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l.diffuse = l.diffuse * 0.5 + 0.5;
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// Specular
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#ifdef _TS_SPECULAR_ON
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half specularPower = PerceptualRoughnessToSpecPower(perceptualRoughness);
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half invV = lh * lh * s.smoothness + perceptualRoughness * perceptualRoughness;
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half invF = lh;
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half specular = ((specularPower + 1) * pow (nh, specularPower)) / (8 * invV * invF + 1e-4h);
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#ifdef UNITY_COLORSPACE_GAMMA
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specular = sqrt(max(1e-4f, specular));
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#endif
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#ifdef SHADER_API_MOBILE
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specular = clamp(specular, 0.0, 100.0);
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#endif
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l.specular = smoothstep(_SpecularThreshold - _SpecularCutoff * 0.5, _SpecularThreshold + _SpecularCutoff * 0.5, specular);
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l.specular *= _SpecularIntensity;
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#else
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l.specular = 0;
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#endif
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// Color
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l.color = l.ambient + (s.diffColor + s.specColor * l.specular) * l.light.color * TS_GetRamp(l.diffuse);
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// Rim
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#ifdef _TS_RIMLIGHT_ON
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l.rim = smoothstep(_RimMin, _RimMax, 1.0 - DotClamped(-s.eyeVec, l.normal));
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l.rim *= _RimIntensity;
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#ifdef _TS_RIMCOLORING_ON
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half3 rim = l.color * _RimColor * l.rim;
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#else
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half3 rim = _RimColor * l.rim;
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#endif
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if (_RimType == 0)
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l.color += rim;
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else if (_RimType == 1)
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l.color = lerp(l.color, l.color * rim, l.rim);
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#else
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l.rim = 0;
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#endif
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// Alpha/Attenuation
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l.attenuation = atten;
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l.alpha = s.alpha;
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// Output
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return l;
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}
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half4 TS_BasicShading(FragmentCommonData s, TS_LightingData l)
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{
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// Color
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half4 color;
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color.rgb = l.color;
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color.a = l.alpha;
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// Shading
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color.rgb *= TS_GetRamp(l.attenuation);
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// Alpha/Attenuation
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#ifndef UNITY_PASS_FORWARDBASE
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color *= l.attenuation;
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#if defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON)
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color *= s.alpha;
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#endif
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#endif
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// Output
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return color;
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}
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#endif
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