add ray march instancing (copies) with row offsets

instancing uses real evaluated copies of the mesh instead of domain
repetition. useful for hiding artifacts as an alternative to quilez's
corrective term, which generally converges more slowly.

1 files changed, 21 insertions, 0 deletions

diff --git a/globals.cginc b/globals.cginc
index 6e0d71f..c2b38cb 100644
--- a/globals.cginc
+++ b/globals.cginc
@@ -134,11 +134,32 @@ float _Ray_Marching_Overstepping_Factor;
 int _Baked_Origins_UV_Channel_Index;
 #endif  // _RAY_MARCHING_BAKED_ORIGINS
 
+#if defined(_RAY_MARCHING_CART_INSTANCING)
+float _Ray_Marching_Cart_Instancing_Count_X;
+float _Ray_Marching_Cart_Instancing_Count_Y;
+float _Ray_Marching_Cart_Instancing_Count_Z;
+float _Ray_Marching_Cart_Instancing_Span_X;
+float _Ray_Marching_Cart_Instancing_Span_Y;
+float _Ray_Marching_Cart_Instancing_Span_Z;
+#endif  // _RAY_MARCHING_CART_INSTANCING
+
+#if defined(_RAY_MARCHING_CART_INSTANCING_OFFSETS)
+float _Ray_Marching_Cart_Instancing_Offsets_X_Every_Y;
+float _Ray_Marching_Cart_Instancing_Offsets_X_Every_Z;
+float _Ray_Marching_Cart_Instancing_Offsets_Y_Every_X;
+float _Ray_Marching_Cart_Instancing_Offsets_Y_Every_Z;
+float _Ray_Marching_Cart_Instancing_Offsets_Z_Every_X;
+float _Ray_Marching_Cart_Instancing_Offsets_Z_Every_Y;
+#endif  // _RAY_MARCHING_CART_INSTANCING_OFFSETS
+
 #if defined(_RAY_MARCHING_CART_GRID)
 float _Ray_Marching_Cart_Grid_Radius;
 float _Ray_Marching_Cart_Grid_Count_X;
 float _Ray_Marching_Cart_Grid_Count_Y;
 float _Ray_Marching_Cart_Grid_Count_Z;
+float _Ray_Marching_Cart_Grid_Span_X;
+float _Ray_Marching_Cart_Grid_Span_Y;
+float _Ray_Marching_Cart_Grid_Span_Z;
 #endif  // _RAY_MARCHING_CART_GRID
 
 #if defined(_RAY_MARCHING_HEX_GRID)