Hello Tim,

I want to make all the object smaler. I understood your firts exemple and I
trayed it, but I don't understand your second exemple. You says:
=============
sphere{<0,0,0>,1
scale <.25,1,1>
translate <5,0,0>
pigment{rgb 1}}
=============
With the scale <.25, 1, 1>, how do you calculate the translate <5, 0, 0>?
If I put scale 5, how can I know the translate vector?

"for a sphere this is kinda pointless, as you could have placed it at the
origin from the beginning and thus save translating it back to the origin:"
Can you tray to explain me it again, please?

Thank you very much,
Oleguer



mensaje news:41481895@news.povray.org...
> > If I do this:
> > ===================================
> > object { Reloj rotate y*115 translate <0, 0, 0> scale 0.5 }
> > object { Puntos }
> > object { Agulles }
> > object { Cilindre }
> > ==================================
> > I thinks that is your idea, I can not see the other object on the
correct
> > place. If I do this:
> > ====================================
> > object { Reloj rotate y*115 scale 0.5 }
> > object { Puntos scale 0.5 }
> > object { Agulles scale 0.5 }
> > object { Cilindre scale 0.5 }
>
> Well, in your first example, you only scale Reloj, in your second example,
> you scale all objects, which is just like you did before. Maybe you should
> consult the Documentaion, Section 2.2.7 for some more information on
> transformations.
>
> The idea is simple: "translate" moves an object, "rotate" rotates an
object
> about the origin and the given axis', and "scale" scales/sizes an object
in
> relation to the origin (<0,0,0>). So, if an object is placed at <5,0,0>
and
> you scale it by .5, not only will the object's dimensions (e.g. its
radius)
> be sized down to half its original size, but the distance to the origin
will
> be sized down as well, thus placing the object at <2.5,0,0>.
>
> Then, when you declare and union{} objects, they all get "glued" together,
> so when you transform a union, all objects inside the union will get
> transformed.
>
> Now, if you want to scale an object's size, but not it's position, what do
> you have to do? Let's say you've got a sphere at <5,0,0> and want to
squish
> it some along the x-axis, making it more disc-shaped. First, you'd have to
> translate the sphere back to the origin, then you scale it, and then you
> translate it back.
>
> sphere{<5,0,0>,1
> translate <-5,0,0>
> scale <.25,1,1>
> translate <5,0,0>
> pigment{rgb 1}}
>
> Now, for a sphere this is kinda pointless, as you could have placed it at
> the origin from the beginning and thus save translating it back to the
> origin:
>
> sphere{<0,0,0>,1
> scale <.25,1,1>
> translate <5,0,0>
> pigment{rgb 1}}
>
> But that's the basic idea of how to transform objects. I don't know what
> exactly you're after, but if you only want to scale certain parts of an
> object, then only scale those, not the entire object.
>
> Regards,
> Tim
>
> -- 
> "Tim Nikias v2.0"
> Homepage: <http://www.nolights.de>
>
>

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