Subject:
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Re: The first video showing a datsville building
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Newsgroups:
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lugnet.cad
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Date:
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Mon, 3 Sep 2001 22:31:12 GMT
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Viewed:
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1389 times
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Michael Horvath wrote:
> Lars, if you could implement a feature in L3p that carries a vector over to
> POVray, that would be great. Here's an example. Let's say camera.dat or
> light.dat were made up of two parts - a base point and an arrow. The base
> point would be the origin, and in LDraw or Mlcad you could rotate the
> arrow-light.dat around the base point in order to point it in the right
> direction. You could have l3p then measure the (distance and cooordinates)
> degree of angle, or slope, betwen those two points (e.g. the tip of the
> arrow and the origin/basepoint) and write that slope as a string of text in
> POVray. You wouldn't have to have l3p write the POV code for a spotlight or
> anything, just the slope (comment it out if you want). I could then cut and
> paste this text into the POVray light_source or camera code that I had
> written myself. This way, one could, say, have a light in an ambulance
> flash while the ambulance is moving. I don't know much about how L3p works,
> or how difficult it would be for you to code this into l3p, but it would
> make it easier to make lights that shine in one direction, and I could
> always do the scripting in POVray myself.
> Thanks, & hope you like my input.
What would you use the slope for?
camera { location <x,y,z> look_at <x,y,z> }
light_source { <x,y,z>, color }
light_source { <x,y,z>, color spotlight point_at <x,y,z> }
/Lars
>
> Mike
>
> In lugnet.cad, Lars C. Hassing writes:
> > Bram Lambrecht wrote...
> > > Eduardo Vazquez writes:
> > > > Great ideas but I had that in mind long time ago in a lego pov scene.
> > > > but the main problem here is that Ldraw has the x,y,z different
> > > > than pov-ray and that impossible to do the only way is do in it
> > > > with Anton Raves's Pov-ray Lego lib or tell to this James to fix
> > > > up the x,y,z in Ldraw.
> > >
> > > The coordinate system is changed easily enough using the sky, up, and right
> > > vectors in the POV camera, or by transforming the objects themselves.
> >
> > Right. L3P uses LDraw's coordinate system in its POV files. (L2P doesn't).
> > /Lars
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Message has 1 Reply:
 | | Re: The first video showing a datsville building
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| Thank you for replying. I would probably enter the slope/angle information into POVray code that resembles something more like this: camera { location <1.250000, 6.986278, 4.250000> direction <-0.28939780593, -0.00816663355, -0.95717394352> up (...) (24 years ago, 4-Sep-01, to lugnet.cad)
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Message is in Reply To:
| | Re: The first video showing a datsville building
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| Lars, if you could implement a feature in L3p that carries a vector over to POVray, that would be great. Here's an example. Let's say camera.dat or light.dat were made up of two parts - a base point and an arrow. The base point would be the origin, (...) (24 years ago, 1-Sep-01, to lugnet.cad)
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