Hardy Henneberg wrote:
> Hello,
> I posted a mail some days ago about vertical lines showing up
> non-vertical. I only got one answer, maybe because the problem wasn't
> clearly explaned. I think many of you have got the same problem - at
> least those of you, who makes programs simulating the world people
> normally exists in. I think of this world as 2� dimension, 1 x, 1 z and
> � y, because we are not moving very much in the Y-dimension compared to
> the two others. That matters, because our brain treat the y-dim.
> different than x and z, and thats why we would like to see vertical
> lines as vertical -also in perspective - though they really shouldn't be
> from a mathematical point of view.
> The problem is that in java3d I can only choose among an orthogonal and
> a perspective projection - I realy need perspective in xz plane and
> othogonality in y-direction.
> I would like some comments on this issue, before I am digging down in
> the mathematics and make my own projection.
>
> kind regards
> Hardy Henneberg
>
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Hello again, and thanks for all the comments,
I think the conclusion of your comments must be, that you prefer, what is
named "correct 3d" to my 2�d. And of course you are right, that "correct 3d"
is the better when standing on top of a high building looking down. The point
is, that in my everyday life in my quiet 2�d world, I dont' do that very
often. In stead I am moving through rooms looking around, looking a bit up
and down, and then I don't want the walls to look like they are falling over.
You are right, that I could circumvent the problem by keeping the camera
parallel to the ground - however thats to much of a restriction for my
applications.
So much for now - my baby is awake.
kind regards
Hardy
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