Software render library

[ReKleSS]

Hi all,
Since nobody has figured out how to use the psp's 3d hardware to draw polygons to the screen, I thought I'd do the next best thing and write a software renderer. It's available from http://www.innerworldadventures.com/renderer.tar.bz2. (Pay no attention to innerworldadventures.com, I just admin it and make use of extra space and bandwidth.) Anyway, what works:

• Raster lines
  Raster polygons
  Filled raster polygons
  3d lines
  3d wireframe polygons
  3d filled polygons

What's still to be done:

• Backface culling
  Z-Buffering
  Text rendering
  User input library

The render library was designed to resemble OpenGL, but seriously stripped down. It does what it should, draw (flat) polygons. The raster library may also be of interest. Anyway, this is still very early and probably has a few bugs... Post them here and I'll try to fix them up for the next release. The only problem that comes to mind at the moment is that the axis passed to rend_rotate must be normalized, since I haven't got an implementation of sqrt() yet and can't do it there.

trig.rb is a Ruby script that generates my precalculated sin, cos and tan tables.

All the library code (render.*, matrix.*, raster.*, test.c, trig.*) is under the BSD license. The rest (startup.S, param.sfo, icon0.png, etc) were taken from nemnem's helloworld.

The demo program (eboot.pbp, test.c) is a sample of how to draw stuff. left, right, up, down, triangle, X, R and L to move the triangle around. Go crazy.

-ReK

[71M]

Hi ReKleSS,
Nice work on the demo! :)
If you want to a SQRT function, you can download the source to my demo over at http://www.psphacker.com/forum/showthread.php?t=635
The SQRT function is only a rough estimate and not that precise, so don't go calculate any flight paths with it :)
I found it very hard developing a PSP demo without the basic functions of a PC!

Hope you find something useful.

Cheers,
71M

[neofar]

and can try this
http://pspdev.ofcode.com/api.php?simple ... yword=sqrt

[71M]

and can try this
http://pspdev.ofcode.com/api.php?simple ... yword=sqrt

I could never get those to work. what're the parameters?
Have you had any luck using them?

Cheers,
71M

[Vampire]

what're the parameters?

takes a float value and returns a float value...

[neofar]

nop .... but it's very very probably to be a

Code: Select all

float function(float);

You should read this
http://forums.ps2dev.org/viewtopic.php?t=2197
I don't know how psp works with floats, or if this is important here..

[71M]

Very useful indeed!
I'll take a closer look at that now...

Thanks,
71M

[ReKleSS]

I've already tried this (for the trig functions). If you as much as add them to startup.s, the psp will freeze. This is probably because the prx with the functions isn't loaded. If you can find the prx and load it, that might work...

-ReK

[ReKleSS]

Finished version 2. This is basically the full featureset, the only thing left is optimization, which will probably never be done because it's pretty boring and chp has almost finished with the 3d hardware. Anyway, texturing, z buffering and backface culling are all included in this release, as well as my own text rendering code (no more pg.c!). It's available from http://www.innerworldadventures.com/psp ... v2.tar.bz2. If you want to compile it, you'll need at least the 20050625 toolchain.

I've also written up a bmp to c file converter (it was in the last release) and a program to build my font.c file. Both are at http://www.innerworldadventures.com/utils.tar.bz2.

No sample code included this time, I'm working on a little proof-of-concept game that will demonstrate most of the features. In the meantime just read the header files.

EDIT: The sample code is up at http://www.innerworldadventuse.com/core.tar.bz2. I've also noticed that the texture mapping isn't as effective as I thought - I'm looking into that now.

-ReK