Pane place direction fixed

src/voxels/voxel.h

@@ -7,6 +7,11 @@ const int BLOCK_DIR_X = 0x1;
 const int BLOCK_DIR_Y = 0x0;
 const int BLOCK_DIR_Z = 0x2;
 
+const int BLOCK_DIR_NORTH = 0x0;
+const int BLOCK_DIR_WEST = 0x1;
+const int BLOCK_DIR_SOUTH = 0x2;
+const int BLOCK_DIR_EAST = 0x3;
+
 // limited to 16 block orientations
 const int BLOCK_ROT_MASK = 0xF;