Hi,
just been trying out this pong tutorial and noticed that it ran very
poorly on my machine. Had a quick look at the code and noticed this:
screen.blit(background, ball.rect )
screen.blit(background, player1.rect )
screen.blit(background, player2.rect )
this code renders the ENTIRE background image (clipped to the screen)
at the locations of the ball and players.
Thats three times.
It was slowing to a crawl when the ball and the bats approached the top
of the screen.
Should look like this:
screen.blit(background, ball.rect, ball.rect)
screen.blit(background, player1.rect, player1.rect)
screen.blit(background, player2.rect, player2.rect)
which copies a small rectangular region from the background image
to the screen, erasing the old ball/player position.
This seems to be an amusing demonstration of what happens when
people are let-loose on massively over-the-top hardware. Goodness
knows what you people must be using not to have noticed this :-)
I test on a P166Mhz-MMX, (that's 166Mhz not 1.6Ghz). I find that it
keeps me frosty.
On a more positive note, the journalistic quality of the tutorial
itself is good, you just need to sort out the code,
good-luck and best regards,
John.
PS the attached patch for tompong-0.4 fixes this and another
performance related issue: font creation.
Attachment:
tompong-0.4-patch.zip
Description: Zip compressed data