Nicolas Martyanoff <[EMAIL PROTECTED]> writes:
>
>
> Hi,
>
> Using your advices, and thank to #lisp people, I finally succeeded a
> small lisp demo using the LispBuilder bindings of SDL, SDL-image, and
> SDL-ttf.
>
> It's really simple, just a bunch of particles flying all over the
> screen, plus a bit of text rendering.
>
I made a few modifications and managed increase the frame rate quite a bit.
Intel Core 2 1.86Ghz
NVIDIA GeForce 7600 GS
WinXP
Lispworks 5
lispbuilder-sdl 0.9.4
sdl-doublebuf sdl-hw-surface
640x480
Particles Framerate
---------------------
0 ~1,300
10 ~1000
50 ~460
100 ~270
250 133
500 70
1000 35
2500 14
5000 7
Modifications:
- Changed (require 'lispbuilder-sdl) to the equivalent ASDF command
allowing the code to work on other Common Lisp implementations.
- Removed the dependency on lispbuilder-sdl-image.
- Converted the PNG image to BMP.
- Removed the dependency on lispbuilder-sdl-ttf.
- Made use of the bitmap font rendering functions in lispbuilder-sdl.
- Made use of the ability of a FONT object to internally cache a
text string rendered to a SDL surface. Drawing the same text to the
screen each frame then becomes an efficient blit.
- Made use of the frames-per-second code built into the WITH-EVENTS macro.
- These functions reflect a more accurate (and lower) frame rate than the
frames-per-second algorithm in your code as the average is
calculated over a sliding window of the previous 60 frames.
To run (main) in particles.lisp, change *IMG-PATH* to the location of the
"particle.bmp" file. Code tested on SBCL Win32 / SBCL Ubuntu and Lispworks 5 on
win32.
http://www.balooga.com/lisp/particles.zip
- Luke
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