Implement bent normals

1 files changed, 16 insertions, 0 deletions

diff --git a/pbr.cginc b/pbr.cginc
index 25d6ece..5e19089 100755
--- a/pbr.cginc
+++ b/pbr.cginc
@@ -16,6 +16,12 @@ struct Pbr {
   float roughness_perceptual;
   float roughness;
   float metallic;
+#if defined(_AMBIENT_OCCLUSION)
+  float ao;
+#endif
+#if defined(_BENT_NORMALS)
+  float3 bent_normal;
+#endif
 #if defined(_CLEARCOAT)
   float cc_roughness;
   float cc_strength;
@@ -208,6 +214,12 @@ Pbr getPbr(v2f i) {
 
   pbr.normal = normalize(mul(normal_tangent, pbr.tbn));
 
+#if defined(_BENT_NORMALS)
+  float3 bent_ts = UnpackNormal(_Bent_Normals_Map.Sample(aniso4_trilinear_repeat_s, uv_parallax * _Bent_Normals_Map_ST.xy + _Bent_Normals_Map_ST.zw));
+  bent_ts.xy *= _Bent_Normals_Strength;
+  pbr.bent_normal = normalize(mul(bent_ts, pbr.tbn));
+#endif
+
   float4 metallic_gloss = _MetallicGlossMap.Sample(aniso4_trilinear_repeat_s, uv_parallax * _MetallicGlossMap_ST.xy);
   pbr.smoothness = metallic_gloss.a * _Glossiness;
   pbr.metallic = metallic_gloss.r * _Metallic;
@@ -219,6 +231,10 @@ Pbr getPbr(v2f i) {
 #endif
   propagateSmoothness(pbr);
 
+#if defined(_AMBIENT_OCCLUSION)
+  pbr.ao = saturate(lerp(1.0, _OcclusionMap.Sample(bilinear_repeat_s, i.uv01.xy).r, _OcclusionStrength));
+#endif
+
   return pbr;
 }