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iris/source/ball.ccp

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2010-01-24 22:34:24 +02:00
#pypp 0
#include <iris.hh>
#include <devices.hh>
static unsigned *framebuffer
static int const r = 10
void ball (int x, int y, bool print):
static unsigned bg
static unsigned count
for int ty = y - r; ty < y + r; ++ty:
if ty < 0 || ty >= 240:
continue
for int tx = x - r; tx < x + r; ++tx:
if tx < 0 || tx >= 320:
continue
if (x - tx) * (x - tx) + (y - ty) * (y - ty) > r * r:
continue
framebuffer[ty * 320 + tx] = (print ? 0xffffff : bg)
if ++count >= 30:
bg += 0x010307
count = 0
Kernel::Num start ():
Kernel::my_parent.init_done ()
framebuffer = (unsigned *)0x15000
Kernel::Caps caps = Kernel::my_parent.get_device <Display> ()
Display display = caps.get (0)
int x = r, y = r, dx = 3, dy = 0
Kernel::Cap eof = Kernel::my_receiver.create_capability (0)
while true:
display.set_eof_cb (eof)
Kernel::wait ()
ball (x, y, false)
x += dx
y += dy
if y + r >= 240:
dy = -dy
y = 240 - r
if x - r < 0:
x = r
dx = -dx
if x + r >= 320:
x = 320 - r
dx = -dx
if y == 240 - r && dy == 0:
dy = -21
++dy
ball (x, y, true)