Subject:
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Re: A different simple question
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Newsgroups:
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lugnet.cad.ray
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Date:
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Thu, 29 Jan 2004 16:10:16 GMT
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Viewed:
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1463 times
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In lugnet.cad.ray, Lars C. Hassing wrote:
> > Hello all you super-smart PoV-Rayers out there,
I am most definitely leaving myself out of that category. Especially after I see
the stupid questions I'm going to have to ask here.
> You are rotating the camera around the y-axis!
I thought that was what I was supposed to do...?
> You would like to rotate it around the vertical axis through the bowl's center.
Right. I thought that's what rotating through the x-axis would do. (apparently
not)
> Translate the model center to origo, rotate, and translate back again:
> translate -<400,-54,400>
> rotate <0,360*clock,0>
> translate <400,-54,400>
> Look at the end of the POV file for model center:
> // Center: <400,-54,400>
I knew about the model center comment at the end of the pov file, but I think
I'm lost about the rest.
Where should the translates and rotation be inserted? What do they do that makes
the camera's movement different?
> The easiest way to create rotations is to rotate the model and leave
> the camera and lights static:
> object { bowl_dot_ldr
> rotate <0,360*clock,0>
> #if (version >= 3.1) material #else texture #end { Color7 } }
> But it gives a different effect.
In this case it would produce the same visual effect, because if you render the
scene you'll see that the only thing visible is the inside of the bowl (which is
supposed to look like a valley full of sand). However, I tried that and got a
similar movement to what happened with the camera.
Thanks a lot for the help. :)
~Mike
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Message has 1 Reply:
 | | Re: A different simple question
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| (...) I'll try to explain it, but it's kind of a difficult concept to explain without pictures. Note that my explanation isn't based on POV, it's based on 3D computer graphics in general. In the real world, when you rotate something, you rotate it (...) (21 years ago, 29-Jan-04, to lugnet.cad.ray)
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Message is in Reply To:
| | Re: A different simple question
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| (...) You are rotating the camera around the y-axis! You would like to rotate it around the vertical axis through the bowl's center. Translate the model center to origo, rotate, and translate back again: translate -<400,-54,400> rotate (...) (21 years ago, 29-Jan-04, to lugnet.cad.ray)
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