Fix 3D tracks to mesh not aligning mesh properly

Also fixed wrong frame number used for reconstructed object
visualization in 3D viewport.

release/scripts/startup/bl_operators/clip.py

@@ -189,6 +189,15 @@ class CLIP_OT_bundles_to_mesh(Operator):
 
         new_verts = []
 
+        scene = context.scene
+        camera = scene.camera
+        matrix = Matrix.Identity(4)
+        if camera:
+            reconstruction = tracking_object.reconstruction
+            framenr = scene.frame_current - clip.frame_start + 1
+            reconstructed_matrix = reconstruction.cameras.matrix_for_frame(framenr)
+            matrix = camera.matrix_world * reconstructed_matrix.inverted()
+
         mesh = bpy.data.meshes.new(name="Tracks")
         for track in tracking_object.tracks:
             if track.has_bundle:
@@ -200,6 +209,8 @@ class CLIP_OT_bundles_to_mesh(Operator):
 
         ob = bpy.data.objects.new(name="Tracks", object_data=mesh)
 
+        ob.matrix_world = matrix
+
         context.scene.objects.link(ob)
 
         return {'FINISHED'}