Fix SCALING_FACTOR conflicting declaration between orca_tree_supports.h and libslic3r.h

Co-authored-by: cochcoder <103969142+cochcoder@users.noreply.github.com>

Author: Copilot

src/libslic3r/Support/TreeSupportRust/include/orca_tree_supports.h

@@ -4,10 +4,6 @@
 #include <ostream>
 #include <new>
 
-/// The scaling factor used to convert between millimetres and internal integer
-/// coordinates. Matches the C++ `SCALING_FACTOR` constant.
-constexpr static const double SCALING_FACTOR = 1e-6;
-
 /// How interface areas interact with support areas.
 ///
 /// Mirrors the C++ `InterfacePreference` enum.

src/libslic3r/Support/TreeSupportRust/src/utils.rs

@@ -39,6 +39,7 @@ pub type CoordF = f64;
 
 /// The scaling factor used to convert between millimetres and internal integer
 /// coordinates. Matches the C++ `SCALING_FACTOR` constant.
+/// cbindgen:ignore
 pub const SCALING_FACTOR: f64 = 1e-6;
 
 /// Convert millimetres to internal scaled coordinates.