Mail Archives: djgpp/1998/03/21/14:01:54
From: | Charles Mennerat <nambi AT club-internet DOT fr>
|
Newsgroups: | comp.os.msdos.djgpp
|
Subject: | 3D beginner (Allegro)
|
Date: | Sat, 21 Mar 1998 18:51:33 +0100
|
Organization: | Grolier Interactive Europe
|
Lines: | 19
|
Message-ID: | <3513FE25.62D5@club-internet.fr>
|
Reply-To: | nambi AT club-internet DOT fr
|
NNTP-Posting-Host: | ppp-102-114.villette.club-internet.fr
|
Mime-Version: | 1.0
|
To: | djgpp AT delorie DOT com
|
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
|
New to 3D I have a few questions.
In the 3d world when shapes have negatives values(for z negatif) the
perspective projection draws lines not the way we expect them.(they
cross one another)What can I do to enter z<0 values?(I use Allegro)
When you calculate (x,y,z) values rotating a shape, the shape doesn't
seem constant.For instance going left and after coming back right the
shape doesn't come back at the same place.What is my mistake?Do I have
to calculate the new coord using the first one entered,or must I use
last coord.(this way tiny errors become none tiny after several
calculations!).
Using Allegro, in rotation you must enter angles "in binary, 256 degrees
to a circle format".What does that meen?
What does this do: itofix(1) & itofix(256).Why can't we just enter an
angle?
Thanks for your help.
- Raw text -