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InsideQC Forums • View topic - [FTE]Rotate entities around common pivot

[FTE]Rotate entities around common pivot

Discuss CSQC related programming.

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[FTE]Rotate entities around common pivot

Postby toneddu2000 » Tue May 23, 2017 4:50 pm

Like said in the title. Is it possible to rotate 2 + entities around an external pivot (it could be an arbitrary vector or whatever)?
I chose CSQC section because I thought (probably wrongly) that CSQC has some ace in its sleeves to accomplish that
Thx guys
- my first commercial game, made with FTEQW game engine
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Re: [FTE]Rotate entities around common pivot

Postby Spike » Wed May 24, 2017 9:38 am

.
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Re: [FTE]Rotate entities around common pivot

Postby toneddu2000 » Wed May 24, 2017 2:13 pm

- my first commercial game, made with FTEQW game engine
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Re: [FTE]Rotate entities around common pivot

Postby Spike » Wed May 24, 2017 2:52 pm

if all you want is to rotate a model around its own origin (aka: pivot), then yeah, avelocity will work for most movetypes.
this is how grenades and vore missiles etc spin in quake.
if you're setting more than one component at a time then your rotation will be non-linear of course, but that's a general issue with eular angles. you can fix that by generating forwards+up vectors then generating a 3*3 matrix and transforming them by that instead of using avelocity. that would give linear rotation, but would also be noticably more complex than a simple vector addition.

the code I gave in my earlier post was to rotate a second entity around the first entity (effectively as part of that first entity's rotation), but if you were after rotating an entity around its own origin then yeah, just setting avelocity is MUCH easier.
.
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Re: [FTE]Rotate entities around common pivot

Postby frag.machine » Wed May 24, 2017 7:09 pm

I know FrikaC made a cgi-bin version of the quakec interpreter once and wrote part of his website in QuakeC :) (LordHavoc)
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Re: [FTE]Rotate entities around common pivot

Postby toneddu2000 » Wed May 24, 2017 7:35 pm

- my first commercial game, made with FTEQW game engine
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