Impostors: implement simple grid snapped impostor particle

1 files changed, 60 insertions, 0 deletions

diff --git a/Impostor.shader b/Impostor.shader
new file mode 100644
index 0000000..1dff6c9
--- /dev/null
+++ b/Impostor.shader
@@ -0,0 +1,60 @@
+Shader "yum_food/Gimmicks/Impostors"
+{
+    Properties
+    {
+        _ImpostorAtlas("Impostor Atlas", 2D) = "white" {}
+        _GridResolution("Grid Resolution", Int) = 5
+        _Cutoff("Alpha Cutoff", Range(0, 1)) = 0.5
+        _Color("Tint", Color) = (1, 1, 1, 1)
+
+        [Toggle] _DebugMode("Debug Mode", Float) = 0
+
+        [Enum(UnityEngine.Rendering.CullMode)] _Cull("Cull", Float) = 0
+        [Enum(Off, 0, On, 1)] _ZWrite("ZWrite", Int) = 1
+    }
+
+    SubShader
+    {
+        Tags { "RenderType" = "TransparentCutout" "Queue" = "AlphaTest" }
+
+        Pass
+        {
+            Name "FORWARD"
+            Tags { "LightMode" = "ForwardBase" }
+
+            Cull [_Cull]
+            ZWrite [_ZWrite]
+
+            CGPROGRAM
+            #pragma target 3.0
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma multi_compile_fog
+            #pragma multi_compile_instancing
+
+            #include "impostor.cginc"
+            ENDCG
+        }
+
+        Pass
+        {
+            Name "SHADOW"
+            Tags { "LightMode" = "ShadowCaster" }
+
+            Cull [_Cull]
+
+            CGPROGRAM
+            #pragma target 3.0
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma multi_compile_shadowcaster
+            #pragma multi_compile_instancing
+
+            #define IMPOSTOR_SHADOW_PASS
+            #include "impostor.cginc"
+            ENDCG
+        }
+    }
+
+    FallBack "Transparent/Cutout/Diffuse"
+}