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Grouping polygonal elements to make collision

by Andrew Locko · in Artist Corner · 12/14/2006 (11:39 am) · 6 replies

Hello there, I have a question regarding collision generation. I have an object that requires accurate collision and it will need more than the standard number of 9 collision objects. Is it okay to attach mulitple polyonal " elements " together to make up one collision object. For example, I have a number of concrete pillars, and each one has to be collided into, so I was going to create a collision box for each one and then group them all together to make up one collision so that I can make collision for the rest of my structure while still staying under the 9 collision object limit. Does this process vilate the rule of using only convex shapes as collisions? Thanks in advance.
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Torque Owner Thak
#1
12/14/2006 (1:00 pm)
Yes it violates the convex rule. If you have two pillars attached as one object it is no longer convex. Maybe you can export each Pillar separately with its collision and then place them together in the Terrain editor?

Andrew Locko
Default Studio Name
#2
12/14/2006 (1:12 pm)
Hmm, thats a thought, but I think its desired to have it within one object. I appreciate your feedback though.

Associate David Montgomery-Blake
David MontgomeryBlake
#3
12/14/2006 (1:22 pm)
You shouldn't be limited to 9 collision objects anymore...

Torque 3D Owner Caylo Gypsyblood
#4
12/14/2006 (1:27 pm)
I have done linking like: THISMESH0Acol-1 to THISMESH0Bcol-1 to THISMESH0Ccol-1 ect.. everything else is linked together like normal, but i only use ONE 'collision-1'.. This is with MAX and the Dark Industries export on 1.42SDK.

Associate Matt Summers
Dark Industries
#5
12/15/2006 (10:53 am)
Also, the currently released build of the Dark Industries Max exporter will export around 20 collision meshes and after that the exporter will error (even though the UI only allows you to setup 9). My current development build of the exporter will export 255 collision meshes. I should have the updated version ready this weekend for release.

Torque Owner Thak
#6
12/15/2006 (11:09 am)
Gosh. I stand corrected. Thanks Guys, I never even tried for more than eight cos I was under the impression I would break things in TGE. Will come in handy for me as well then. I devised so many workarounds to a problem that don't exist any longer its not even funny anymore. :p