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Switching between 3D and 2D mode in runtime?

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Switching between 3D and 2D mode in runtime?
Yelmer Offline
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#1
02-05-2019, 02:46 PM
Is there any way to swap between 2D and 3D mode on a obi solver (fluids) in runtime? I am trying to access the variable/parameter trough scripting, but I can not find a "Mode" on the Obisolver. Either I am looking in the wrong place - or the answer is "no you can not"? Sonrisa

And since someone always asks "Why would you want to do that" let me clarify that I understand I can not do both 2d and 3d at the *same* time.  Guiño 
It just would like using the same one solver and swap between 3d and 2d mode and keep all other settings - instead of setting up another one and point emitters back and forth and make sure all things match up. It is a visual effect thing that happens in between some other things in a visual art thing.
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josemendez Offline
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#2
03-05-2019, 03:40 PM (This post was last modified: 03-05-2019, 03:53 PM by josemendez.)
(02-05-2019, 02:46 PM)Yelmer Wrote: Is there any way to swap between 2D and 3D mode on a obi solver (fluids) in runtime? I am trying to access the variable/parameter trough scripting, but I can not find a "Mode" on the Obisolver. Either I am looking in the wrong place - or the answer is "no you can not"? Sonrisa

And since someone always asks "Why would you want to do that" let me clarify that I understand I can not do both 2d and 3d at the *same* time.  Guiño 
It just would like using the same one solver and swap between 3d and 2d mode and keep all other settings - instead of setting up another one and point emitters back and forth and make sure all things match up. It is a visual effect thing that happens in between some other things in a visual art thing.

Hi there,

Just do:

Code:
solver.parameters.mode = <2D or 3D>
solver.UpdateParameters();

See:
http://obi.virtualmethodstudio.com/api.html

Note however, than when switching from 3D to 2D existing particles won't be projected back to a common 2D plane. Each one will continue simulating in their own plane, centered at their current Z coordinate. You might want to loop trough all of them setting their Z to 0 (or whatever value you need it to be, so that they all share the same 2D plane).

Switching from 2D to 3D, no special care needs to be taken Sonrisa
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