Some time ago I asked about creating an animation where a single object
increases in size to which I received great answers. I've just returned to
this project and noticed that the perspective doesn't appear to be correct
for a cube (looking at the centre). As the size of the cube increases the
vertical lines begin to converge at the bottom - camera slightly above and
cube rotated. Are there general rules to avoid such problems?
Thanks.
In article <web.42357ba25558114037ad5b9f0@news.povray.org>,
"kmac99" <nomail@nomail> wrote:
>>Some time ago I asked about creating an animation where a single object>>increases in size to which I received great answers. I've just returned to>>this project and noticed that the perspective doesn't appear to be correct>>for a cube (looking at the centre). As the size of the cube increases the>>vertical lines begin to converge at the bottom - camera slightly above and>>cube rotated. Are there general rules to avoid such problems?>>>>Thanks.
i'm not a specialist about that but try to use orthographic camera
or with standard camera, use a small angle.
not tested
klp
kmac99 nous apporta ses lumieres en ce 2005-03-14 06:55:
> Some time ago I asked about creating an animation where a single object> increases in size to which I received great answers. I've just returned to> this project and noticed that the perspective doesn't appear to be correct> for a cube (looking at the centre). As the size of the cube increases the> vertical lines begin to converge at the bottom - camera slightly above and> cube rotated. Are there general rules to avoid such problems?> > Thanks.> >
This convergeance is an effect of perspective and is as it should be. A real
photograph will show
the same thing.
As kurtz said, an ortographic camera will elliminate this effect, while flatening any
perspective.
Another way is to use a spherical camera and chosing carefully the vertical and
horizontal angles. I
suspect that those angles will change with the position and orientation of the camera,
and probably
with the size of the object.
Alain
