|
|
Am 25.09.2018 um 19:55 schrieb Warren:
> camera{
> orthographic
> location <0, 4, 0>
> look_at 0
> sky z
> up 4*z
> right 4*x
> }
...
> Ps: from my point of view, the above camera settings (without the 'direction'
> line) should make a camera without any mistaking for povray , I mean povray
> shouldn't need to append default settings because it has everything it needs to
> make the render ?
> Thank you.
Without the `direction`, POV-Ray has no idea whether you want a
left-handed or right-handed coordinate system.
Remember, the `look_at` mechanism works as follows:
(1) POV-Ray first sets up the camera as specified by your `up`, `right`
and `direction` vectors, as if the `look_at` statement wasn't there.
This defines the handedness of the coordinate system, the aspect ratio,
and (depending on camera projection) the zoom (unless you also specify
`angle`).
(2) Once that is done, POV-Ray re-orients the camera (rotating it around
its location) in such a manner that the `look_at` point is in the center
of the image (for most projections at any rate).
So specifying `look_at` is no replacement for specifying `direction`.
Post a reply to this message
|
|