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- Newsgroups: comp.os.os2.programmer
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!usenet-feed.cc.umr.edu!mcs213c.cs.umr.edu!johns
- From: johns@mcs213c.cs.umr.edu (John Stone)
- Subject: Re: I want to learn how to do simple graphics, keyboard, and joystick I/O
- References: <1992Sep2.104307.14331@cco.caltech.edu> <1992Sep2.212551.19196@umr.edu> <1992Sep5.193043.4750@sbcs.sunysb.edu>
- Date: Sun, 6 Sep 1992 05:39:21 GMT
- Nntp-Posting-Host: mcs213c.cs.umr.edu
- Organization: University of Missouri - Rolla
- Sender: cnews@umr.edu (UMR Usenet News Post)
- Message-ID: <1992Sep6.053921.20831@umr.edu>
- Lines: 53
-
-
- Hi there!
-
- Here is some more info on what I've got:
- I've been working on some more stuff, I have done a really simple
- 3d perspective projection library, just enough to see if I should
- pursue 3d, I've been VERY encouraged by the speed ;-)
-
- If you have seen the "unreal" demo (on wuarchive.wustl.edu) that
- has the moving fractal landscapes in 3d (plotted with lots of points...)
- I've been able to duplicate the effect in 32 bit OS/2 :-)
-
- I should be uploading 3 demo programs to hobbes in the next few days,
- one is a volcano simulation (just a cute little thing) that uses
- a point aggregation algorithm with trajectory to build up a volcano...
-
- The second demo is a cellular automata demo that I adapted from
- psuedocode in an old Scientific American (did it 2 years ago in pascal,
- and I just rewrote it in C with my graphics lib)
-
- The third is my favorite, it uses more of what OS/2 is good at :-)
- It is my own version of the Landscapes section of the unreal demo
- that everyone has been seeing lately... (from the Assembly '92 demos)
- I allocate storage for 160,000 altitude points, and fill it with either
- a 3D sinewave, or a fractal landscape (may add a few other things before
- putting it on hobbes) and I use an integer 3d projection routine that
- I wrote to animate/rotate these 3d surfaces... (using lots of points like
- the unreal demo)
-
- You can see how I handle screen switching in the cells.exe demo, in that
- one I keep calculating new frames even when it isn't in the foreground,
- in volcano, I just ignore switching (I allow it, but I don't save the screen
- before allowing the switch, so if you could trash it, although I haven't
- been able to yet...)
- In the 3d program, I don't allow screen switching during the rendering,
- because I need as much speed as possible, but I may change that...
- I use VioScrLock() to get the screen, and I use the status param
- to detect if I actually got it or not... (in the case of non-blocking)
-
- anyway, give me a couple more days and I'll release the elementary stuff
- that I have done so far.
-
- I REALLY need to get on the ball with a lot of 2D library stuff like
- floodfills, filled polys (need these to continue with the 3d stuff too)
- and stuff like bitblts (for games etc)
-
- I have had no luck with getting Mouxxxxx() calls to work in 320x200 yet.
-
- Later,
- John Stone
- johns@cs.umr.edu
-
-
-