Add second clearcoat mask, and add invert ability

Also optimize by locking each behind a keyword.

1 files changed, 16 insertions, 1 deletions

diff --git a/pbr.cginc b/pbr.cginc
index b7ed27d..6cc317d 100644
--- a/pbr.cginc
+++ b/pbr.cginc
@@ -291,7 +291,22 @@ float4 getLitColor(
 
 #if defined(_CLEARCOAT)
     // Direct lighting
-    float cc_mask = _Clearcoat_Mask.SampleGrad(linear_repeat_s, i.uv, ddx(i.uv.x), ddy(i.uv.y));
+    // TODO add keywords to optimize away mask samples when not used
+    float cc_mask = 1;
+#if defined(_CLEARCOAT_MASK)
+    float cc_mask_tmp = _Clearcoat_Mask.SampleGrad(linear_repeat_s, i.uv, ddx(i.uv.x), ddy(i.uv.y));
+    if (_Clearcoat_Mask_Invert) {
+      cc_mask_tmp = 1 - cc_mask_tmp;
+    }
+    cc_mask *= cc_mask_tmp;
+#endif
+#if defined(_CLEARCOAT_MASK2)
+    float cc_mask2_tmp = _Clearcoat_Mask2.SampleGrad(linear_repeat_s, i.uv, ddx(i.uv.x), ddy(i.uv.y));
+    if (_Clearcoat_Mask_Invert) {
+      cc_mask2_tmp = 1 - cc_mask2_tmp;
+    }
+    cc_mask *= cc_mask2_tmp;
+#endif
     {
       float3 cc_L = direct_light.dir;
       half3 cc_H = Unity_SafeNormalize(cc_L + view_dir);