We've optimized the C64 BASIC bouncing ball program before, but how about optimizing a bouncing pixel ball within a sprite frame that also bounces around the screen? That's TWO things happening at once. Thanks to Eyvind for this challenge!
Check out Eyvind's github for more C64 code: https://github.com/eyvindebsen
CBM .prg Studio: https://www.ajordison.co.uk/
Previous episodes mentioned:
"One-Line Bouncing Ball: Commodore 64 BASIC" https://youtu.be/jhQgHW2VI0o
"38911 Bytes Free? Commodore 64's BASIC RAM" https://youtu.be/WZQ1FMWnG9w
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Become a patron: https://patreon.com/8BitShowAndTell
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2nd channel: https://youtube.com/channel/UCAgWzEh5c8391eJnELDy9OA
Index:
0:00 A Facebook C64 BASIC challenge
1:24 Measuring code size, general thoughts
5:05 About optimizing for program size
7:17 Robin's V0: Line 10: the magic FN
15:17 Lines 20-30: Initializing the sprite
18:37 Lines 40-50: Main loop moving sprites
23:30 Robin's V1: Four logical lines
27:20 Line 1: V=53269, and how less lines saves memory
30:15 Line 2: Creating the sprite
34:05 Lines 3-4: The main loop
36:42 Eyvind's Final version
45:19 A few more bytes saved in both our programs
47:32 Thanks to Eyvind and my patrons!
