rotating an object around a certain point

bernardfrancois · Post by **bernardfrancois** » Thu Sep 04, 2003 2:47 pm

hello,

is it possible to rotate a 3d object around a certain point, and not around it's center?

coldarchon · Post by **coldarchon** » Thu Sep 04, 2003 8:53 pm

are you talking about a distance or a track algorithm?

Kale · Post by **Kale** » Fri Sep 05, 2003 12:37 am

You could use a little math and use Sin() and Cos() to plot a circular path around a point.

bernardfrancois · Post by **bernardfrancois** » Fri Sep 05, 2003 11:31 am

I tried to do that, but there's something wrong with my procedure:

Procedure RotateParticleEmitterArround(emitter,xpos,ypos,zpos,xrot,yrot,zrot)
xdelta=Abs(ParticleEmitterX(emitter)-xpos)
ydelta=Abs(ParticleEmitterY(emitter)-ypos)
zdelta=Abs(ParticleEmitterZ(emitter)-zpos)
; X rotation
ymov=Sin(xrot)*ydelta
zmov=Cos(xrot)*zdelta
; Y rotation
zmov=Sin(yrot)*zdelta
xmov=Cos(yrot)*xdelta
; Z rotation

RotateParticleEmitter(emitter,xrot,yrot,zrot)
MoveParticleEmitter(emitter,xmov,ymov,zmov)
EndProcedure

anyone who sees what's my mestake?