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Thanks for your ideas, just to let you know I haven't dropped off the map I just haven't had too much time to spare but I will test the ideas soon (ish).

Thank-you but even with the millisecond timer the jumps in performance are still very significant. On the PC the graph is a relatively smooth curve of degrading performance. I'm more concerned with why the gp2x exhibits this behavoiur because it doesn't make any sense to me. Mayb e there's a...

I thought it might be something like that so I made a version that measures clock ticks instead of seconds ((float)(clock() - start) / (float)CLOCKS_PER_SEC)) and I got the same shape graph. Then I actually eyeballed the data and I found something a little surprising: CODE 50 frames : 610000...

I have been doing a little performance testing of the SDL_gfx anti-aliased line drawing function and I'm getting some strange (I think) results. The program I used to test just draws incresing numbers of vertical lines on the screen. The results show some really strange jumps that I am at a...

Yup, that's how I did it (and knew how to) C

That does make sense, I'll have to check the SDL_gfx sources to see if they're alreay doing it but if not it sounds like that could make quite a big difference. Does SDL constantly write to the frame buffer? Excuse my ignorance but this is the closest I've been to the silicon, well, ever. I did...

So I have all the graphics features I want in place for my wireframe so now it's time to think about optimization. I compiled my program with -pg to generate profiling data and ran it on the pc and the gp2x. The results were a bit of a suprise to me: on the pc the most time is spent in the...

Yes well, it was an easy way to get through the tutorials but I needed un-targetable objects for backgrounds and I used the text to test it. Sorry :) charlieb

I just use the excellent SDL_gfx library, I tried to write an implementation of Bresenham's line drawing algorithm once and it sucked so I really don't know what aa algorithm was used, just that the non-aa lines were too blocky for my, admittedly retro, tastes. The wording of the third tutorial...

There's one more thing that I thought of that I have done in the past and that is to burn the CD wrong. When you download an .iso image you need to burn an CD of the image as opposed to burning a CD with the image on it. If your computer is configure to boot from the CD already and all it find...

A week, he must be high ;)

Agreed, you gotta work up to slackware, debian or gentoo :) There are a lot of "live CD" distros maybe he should try a bunch of them even before installing to see which feels nicest to him. C

I will definitelly finish it, in fact as far a graphics and gameplay go it's pretty much there. It's no Rez tho, there's no sound yet, no backgrounds and no textures. I will fix the first two but I'm not getting into textures; I'm sure they're simpler to code than I think they are but no, not...

Well, I don't want to start a holy war or anything but Ubuntu is the current golden boy of linux so I'd go with it before I switch to another distro. As for the bios I normally pick a key and hammer on it continuously until I see either the bios or a windows boot screen (not that I would *ever*...

Other likely candidates are F3, F8, left shift.

According to the interweb you have to hit F2 when you see the sony logo to get into the bios, then you should disable plug and play and make your boot order CD,HDD,FDD or something like that.

What is probably happening is that your bios is set to boot off the hard disk first and ignore the CD. You need to get into the bios and change it so it tries the CD first then boots off the hard disk. There is usually a message on the screen when the machine first powers up that tells you what...

I've made a new build and added a couple of levels. Keys are now: In menus: A selects, X backs out In game: A is fire, R is double speed and start is quit. Levels: Easy version of the hard level Circles level, somewhat complete level with lots of spirals and stuff. Since the archive latency is...