Good morning:
I’m using rhino to view different angles of a vehicular crash reconstruction. I have point clouds, polygonal models, texture maps and all sorts of elements in the 3D environment which is tied to a fixed (global) coordinate frame based upon the crash scene geometry. there are multiple copies of the blocks which represent the vehicles moving through the crash scene environment before and after the collision.
I would like to know if it’s possible to overlay a second coordinate system which is local to the main vehicle in the crash at the moment of impact? I would like to be able to tell Rhino that the x-axis is parallel to the vehicle, the y-axis is perpendicular (to the drivers left) and the z is still vertical. I would like to do this so that the orthogonal views of the scene (top, right, etc.) are aligned with the vehicle-fixed coordinate frame while I manipulate the models to analyze the impact, and I would like use the vehicle-fixed coordinates for layouts of the impact, but I don’t want to lose the coordinate fixed reference frame as the global.
Can you tell me how to assign a secondary and subordinate coordinate frame, if it’s possible?
Thanks,
Don
rhino has the concept of world coordinates - the once that are written to the file.
and there are cplane (construction - plane) coordinates.
you can have as many cplanes as you want and save them in the “_namedCplanes” panel.
(and then restore them)
of course you can always access / restore the default, world plane.
as soon as you have a custom cplane you can look on it in parallel projection using the command
_plan
(sorry a house is easier then a car…)
to explain it
a house in world / global coordinates
a custom cplane on the roof to construct the solar panels
the command _plan will then look onto the roof
(A) to fully reset right-click on the blue viewport name “perspective” → set view → perspective
or
(B) use ctrl + shift + RMB to free the view from the plan … (the view is still parallel projection then)
check the following commands in the help
_cplane
_plan
_namedCplanes
_namedViews
hope this helps - kind regards -tom
Yes, that does help. Thank you.
I rotated the view so I can see the side of the vehicle.
I used the set Cplane to view command.
I saved this view as a named Cplane.
Now when I select the named Cplane and type plan, it comes back to this view.
What command what I have to assigned to toolbar buttons so that I could see this CPlane in plan, or rotated 90° (the front of the vehicle) and then from above? I’d like to make buttons that show me orthogonal views based upon the custom Cplane like the little red car buttons on the set view tab do for the World Cplane.
Rhino Settings / Options
Modelling Aids
Construcition Planes
→ Universal construction planes
will always set the corresponding c-planes in the 4 default viewports.
I don t use it often, but i think it is best practise to start with the 4 default viewports and only set the cplanes in the perspective viewport.
2 links to corresponding help: