Stephen <mca### [at] aolcom> wrote:

>
> Oops! I forgot the beginnings of this thread.
> That's what he said in the first post. But the third one with an
> attachment still says:
>
> > // You can only use screen.inc with the perspective camera. Screen.inc
> > // will automatically create the camera definition for you when it is
> > // included.
>

No need to remember it: it's there, online, you can read it again ;) But I think
you copied these lines from its screen.inc attachment. BUT, these lines are
there because SharkD copied them from the original screen.inc and frogot to
delete them :D Maybe it's me: but I am sure this thread would not be here if
SharkD did not have tried to get ortho-cam to work. Moreover, his
reimplementation of Set_Camera would not have a new `orth` parameter:

    #macro Set_Camera(Location, LookAt, Angle, Ortho)

Right?

So, ... we are a bit at cross-purposes, i think. I attached examples of a
minimal scene. minimal_perspective.pov uses the normal camera, and using
screen.inc (minimal_screen.pov) gives identical results. When setting the
ortho-cam in the traditional way, I get the expected result (minimal_ortho.pov).
However, when using SharkD's screen.inc and setting `ortho=on`), the result is
way different (minimal_ortho_screen.pov). I think this is not how it is supposed
to work, i.e. minimal_ortho.png and minimal_ortho_screen.png are supposed to be
identical, but they are not.

>
> There will be a tangent in there some way.
>
> https://en.wikipedia.org/wiki/Angle_of_view#Derivation_of_the_angle-of-view_formula
>
> All those hard quantum sums, eh? ;-)
>

I see, it should be simple ;) I tried it, see minimal_ortho_fake.pov. But it is
still wrong :/

Does anyone see a fix for SharkD's approach? Or do you see where my mistake in
the fake version is?

Thanks :)

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Attachments:
Download 'minipov.zip' (176 KB)