mesh files use game space (right-handed, y up): obj/gltf import and export no longer mirror models, per-mesh handedness keeps meshes of old projects as they were, python tools follow (--export-space for the old files)

tools/vorschau/render_level.py

@@ -69,7 +69,7 @@ for ln in open(os.path.join(objdir, 'level.obj')):
     if ln.startswith('v '):
         p = ln.split()
         x, y, z = float(p[1]), float(p[2]), float(p[3])
-        V.append((x, z, y))          # game (x, y, -z) -> Blender (x, -game_z, y) = (x, z_obj, y_obj)
+        V.append((x, -z, y))         # OBJ = game space (right-handed, y up) -> Blender z up
         C.append((float(p[4]), float(p[5]), float(p[6])) if len(p) >= 7 else (1, 1, 1))
     elif ln.startswith('vt '):
         p = ln.split(); VT.append((float(p[1]), float(p[2])))
@@ -81,7 +81,7 @@ for ln in open(os.path.join(objdir, 'level.obj')):
             q = t.split('/')
             vi.append(int(q[0]) - 1)
             ti.append(int(q[1]) - 1 if len(q) > 1 and q[1] else -1)
-        faces.append((vi[::-1], ti[::-1], mat))     # mirroring -> reverse winding
+        faces.append((vi, ti, mat))
 
 matnames = sorted(set(f[2] for f in faces))
 mesh = bpy.data.meshes.new('level')