specify the global Cartesian coordinate /vup

[jiligeo]

Dear friends,
I am interesting to specify the global Cartesian coordinate system with the following directions:
Z vertical downward, X horizontal to the right, Y out from the screen.
Is it possible to define that?
I have used the /vup,1,-z command with Z vertical downward, Y horizontal to the left, X out from the screen, but the results of viewing the model from top and front are not correct and I can not correct that with /view command.

Regards
Jalil

 

[cbrn]

Hi,
of course!
The orientation of the "world" is perfectly arbitrary, it has nothing to do with "real" upwards, downwards, etc... directions!!!
If you need the Z-axis to be "downwards", simply build your model in the corresponding way. If you are importing from a CAD model, the CAD "world" CSYS, which is used in the Parasolid or IGES file (apart some exceptions...) will be made coincident with the ANSYS CSYS,0.
In the same manner, "top", etc views are named so, based upon the orientation of CSYS,0: for example, "top" is the view where the positive Z-axis direction points outside the screen, etc...
If you already built the model in a CSYS which doesn't fit your needs, the simplest way you have to change the orientation of the reference CSYS is:
- place workplane on CSYS,0: CSYS,0 and then WPCSYS,-1
- rotate workplane as needed: WPROTA,0,180,0
- build new CSYS of cartesian type (named, for example, 20) on the workplane: CSWPLA,20,0
- ensure the new CSYS is active: CSYS,20
- rotate all the nodes in CSYS 20 (only if needed): NROTAT,all
- change elem CSYS from 0 to 20 (only if needed): EMODIF,all,ESYS,20

Hope this helps...

Regards

 

[jiligeo]

Dear cbrn, thanks a lot for your answer. I am using solid modelling and I am interesting to change the definition of Top and Front view. Is it possible?

 

[cbrn]

Hi,
as far as I know, predefined "top" etc can not be changed.
However, you can define Views and recall them.
I've never played around with this topic so I can't help you more, but it seems to me that in the Help you will find plenty of information about that.

As soon as I find time, I have a look on it also...

Regards

 

[Stringmaker]

You can save a "view" using the /gsave command. Easiest thing would be to would be to save the view you want and create a button which executes a macro in the toolbar. The macro would basically be:

/input,,vew !file created with /gsave command
/auto
/rep

Easy enough I'd say!

-Brian