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View Full Version : 2 Problems: Symmetry and Flattening


Deracus
04-22-2008, 05:07 PM
Hi

i got two "problems" of understanding the XSI-Workflow:

1. How do i achieve something like the symmetry modifier of max or the instance symmetry option in Silo?
As far as i know, i have to clone the mesh and then scale it -1 on the x-Axis. After that i have to clone that clone again, merge both of them and then make them unselectable. Afterwards i can work with the original half and see the result on the cloned meshes...

A bit complicated but ok...

But i have to issues with that:
- When i extrude polys, who have one edge along x=0, then i get Polys on the inside of the model and have to delete them by hand...
Is there a way to prevent that? Because of this is i have to manually recreate the symmetrized mesh after i finished it.
Also is there a way to fix the welding at the middle axis? When i move a Point over the axis or on the axis, the chance is high, that the seam getīs disconnected or the mesh gets pushed into each other.

2.

Is there a script/function like "Make Planar", "View Align" or "Flatten Poilygons" in XSI?
Iīve heard, that i should select the polys, than choose scale, local and then scale the axis that i want to zero.
But this doesnīt really work sometimes...so it would be great to have a function, that does this everytime.
This could be very handy to make sure, that the symmetry axis is always perfectly aligned to x= 0...and there are lotīs of other times where this could be usefull, as it is much more predictable then the sometimes working way of scaling

cryptosporidium
04-28-2008, 10:50 AM
Yes, these functions would be nice to have in XSI .-) Maybe in v7...

cgisims
05-13-2008, 05:07 PM
I agree with #2, that command would be nice....I'm sure it could be scripted relatively easily, but I'm no programmer....

,but symmetry is built into XSI. It's not too complicated at all, and you don't have to make a copy of your object and scale it...(you used to in older versions

On the right menu, in the transform area, there are some buttons. Click the "Sym" button (short for symmetry) to activate symmetry mode. You can right click the button to get extra options as well. The only thing to note is that if you duplicate polygons or add points or edges on one side, it will not add them to the other side (hopefully this will be supported someday....) So to get around it, just duplicate or add edges on both sides, then do your transforms just on one side...just make sure your models vertices are symmetrical.