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In lugnet.cad.ray, Don Heyse writes:
> location L3LookAt + vaxis_rotate(L3Location-L3LookAt,
> <-0.353553,-0.866025,0.353553>, STEREO)
> Where's that <-0.353553,-0.866025,0.353553> vector come from anyways?
I'm not entirely sure. It's actually a line segment with an emplied
endpoint of <0,0,0>. I tried to duplicate the math that went into that
vector, got stumped (I think there's at least one more assumption that
POVRay makes with vaxis_rotate() that I'm not catching), and decided to
back-burner that part of the section until Lars re-writes it.
Besides, my understanding of 3D math algorithms is shaky enough that I'm not
going to touch any new math until I can find a decent text on the matter. :-,
> I don't think it's all that much more advanced. Besides it's harder
> for me to get thinking about the location line, only to be distracted by
> the angle and the sky and all, so that by the time the article finishes
> up on the location line I forgot what I already learned about it. Better
> to work one topic all the way to it's conclusion before changing the
> subject.
Cool, you've convinced me, then. Thanks! :-,
Cheers,
- jsproat
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