diff options
Diffstat (limited to 'yum_pbr.cginc')
| -rw-r--r-- | yum_pbr.cginc | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/yum_pbr.cginc b/yum_pbr.cginc index ec5bedb..5baff19 100644 --- a/yum_pbr.cginc +++ b/yum_pbr.cginc @@ -99,6 +99,44 @@ void applyGradientNormals(v2f i, inout YumPbr pbr) { } #endif +#if defined(_SEA_FOAM) +void applySeaFoam(v2f i, inout YumPbr pbr) { + float2 uv = i.uv01.xy; + + float4 slope = 0; + + #if defined(_SEA_FOAM_0) + slope += _Sea_Foam_0_Slope.SampleLevel(bilinear_repeat_s, uv * _Sea_Foam_0_Slope_ST.xy, 0); + #endif + #if defined(_SEA_FOAM_1) + slope += _Sea_Foam_1_Slope.SampleLevel(bilinear_repeat_s, uv * _Sea_Foam_1_Slope_ST.xy, 0); + #endif + #if defined(_SEA_FOAM_2) + slope += _Sea_Foam_2_Slope.SampleLevel(bilinear_repeat_s, uv * _Sea_Foam_2_Slope_ST.xy, 0); + #endif + #if defined(_SEA_FOAM_3) + slope += _Sea_Foam_3_Slope.SampleLevel(bilinear_repeat_s, uv * _Sea_Foam_3_Slope_ST.xy, 0); + #endif + + float dfx_dx = slope[0]; + float dfy_dy = slope[1]; + float dfx_dy = slope[3]; + + float Jxx = 1 + dfx_dx * _Sea_Foam_Lambda; + float Jyy = 1 + dfy_dy * _Sea_Foam_Lambda; + float Jxy = dfx_dy * _Sea_Foam_Lambda; + + float det = Jxx * Jyy - Jxy * Jxy; + float foam_contribution = det; + foam_contribution += _Sea_Foam_Bias; + foam_contribution = saturate(foam_contribution); + + pbr.albedo.rgb = lerp(pbr.albedo.rgb, _Sea_Foam_Color.rgb, foam_contribution * _Sea_Foam_Color.a); + pbr.smoothness = lerp(pbr.smoothness, 1.0f - _Sea_Foam_Roughness, foam_contribution); + propagateRoughness(pbr.smoothness, pbr.roughness_perceptual, pbr.roughness); +} +#endif + YumPbr GetYumPbr(v2f i, float3x3 tangentToWorld) { YumPbr result = (YumPbr)0; @@ -224,6 +262,9 @@ YumPbr GetYumPbr(v2f i, float3x3 tangentToWorld) { #if defined(_GRADIENT_NORMALS) applyGradientNormals(i, result); #endif +#if defined(_SEA_FOAM) + applySeaFoam(i, result); +#endif #if (defined(FORWARD_BASE_PASS) || defined(FORWARD_ADD_PASS)) && defined(_GLITTER) GlitterParams glitter_p; |