re-add scaling

sdf_export.py

@@ -12,6 +12,25 @@ def mesh_to_sdf_glsl(path, resolution=32):
     print(f"  Bounds: {mesh.bounds}")
     print(f"  Extents: {mesh.extents}")
 
+    # Center the mesh
+    bounds = mesh.bounds
+    center = (bounds[0] + bounds[1]) / 2.0
+    mesh.vertices -= center
+    print(f"\nAfter centering:")
+    print(f"  Center: {center}")
+    print(f"  Bounds: {mesh.bounds}")
+    print(f"  Extents: {mesh.extents}")
+
+    # Scale the mesh to fit in a reasonable size for SDF computation
+    max_extent = np.max(mesh.extents)
+    scale = 1.0 / max_extent
+    mesh.vertices *= scale
+    print(f"\nAfter scaling:")
+    print(f"  Scale factor: {scale}")
+    print(f"  Bounds: {mesh.bounds}")
+    print(f"  Extents: {mesh.extents}")
+    print(f"  Vertex range: [{np.min(mesh.vertices)}, {np.max(mesh.vertices)}]")
+
     # Convert vertices and faces to the correct types
     vertices = mesh.vertices.astype(np.float32)
     faces = mesh.faces.astype(np.uint32)