Add sdf mode to decals

1 files changed, 7 insertions, 0 deletions

diff --git a/decal.cginc b/decal.cginc
index 069a42f..10b2f7a 100644
--- a/decal.cginc
+++ b/decal.cginc
@@ -35,6 +35,13 @@ float2 decal_rotate(float2 uv, float rotation) {
     uv -= _Decal##N##_MainTex_ST.zw; \
     uv *= _Decal##N##_MainTex_ST.xy; \
     float4 albedo = decal_sample(_Decal##N##_MainTex, uv, _Decal##N##_UV_Mode); \
+    if (_Decal##N##_SDF_Enabled) { \
+      float sd = _Decal##N##_SDF_Invert ? 1 - albedo.r : albedo.r; \
+      float d = sd - _Decal##N##_SDF_Threshold; \
+      float w = fwidth(d) * 0.5; \
+      albedo.rgb = sd; \
+      albedo.a = smoothstep(-w, w, d); \
+    } \
     albedo *= _Decal##N##_Color; \
     albedo.a *= _Decal##N##_Opacity; \
     if (_Decal##N##_Mask_Enabled) { \