Hi,
Running Strawberry Perl on Win 7 x64 I have installed SDL and Alien::SDL from
CPAN (selecting option 1) and I'm writing a twin stick shooter game for fun. I
have three questions:
1) When rotating sprites using the ->rotation() method the sprites often get a
line of "artifact noise" along one of the sides, usually the right and/or
bottom edge of the original sprite. The effect is not constant and the
original sprites are all 100% transparent at the edges so I believe the
artifacts are introduced by the rotation algorithm. Or is it?
2) After experimenting with different sprite sizes, it seems that there's a
limit somewhere. When attempting to load a sprite that's too large, I get a
seemingly valid sprite object that just doesn't seem to render anything. Is
there a known size limit to sprites or could this be a driver issue? Or am I
overlooking something?
3) How exactly does the 'alpha_key' property work? I tried setting it to the
ubiquitous bright purple (FF00FF) but this just caused half my sprites to
become completely invisible. When using PNG files with an alpha channel, using
a key color seems pointless to me, which makes the POD example code somewhat
confusing:
# spawning can include almost all of the above:
my $sprite = SDLx::Sprite->new(
image => 'hero.png', # or surface => SDL::Surface
rect => SDL::Rect, # or x => $x, y => $y
clip => SDL::Rect,
alpha_key => SDL::Color, # or [$r, $g, $b]
alpha => 1,
rotation => 45, # degrees
);
If anyone is interested in a sneak peek, here's the code:
http://floyd.atc.no/Programming/Perl/IfItMoves/2012-04-23.zip
Suggestions are welcome :-)
--
Andreas Lund ([email protected])
Tel: +47 90077162
#include <disclaimer.h>
"Look at you hacker, panting and sweating as you run through my corridors.
How can you challenge a perfect immortal machine?" -- SHODAN, System Shock
