[Coco] Mary's arcade game nearing release
operator at coco3.com
Sun Jan 6 01:41:18 EST 2008
With several days of dealing with collision detection problems after
altering some code, I finally got it right tonight and the critter
sprites are now reacting as they should when Mary's character touches them.
An extra VSYNC has to be used in the screen updates or the game would
be too fast. Now it runs at the ideal smooth and constant
framerate. Keep in mind that this game uses NO page flipping. A
single screen is used and all sprites are erased, moved, and
replotted at the right time to eliminate flicker. Special methods
are used to minimize time-wasting opcodes in between the erasing and
replotting. I could probably add a lot more sprites to the game and
have it work well, but I'l save that for my next idea. Even the tree
graphics are plotted on each frame (without erasing them first). So,
two VSYNCs are used to plot two groups of sprites, then a third VSYNC
to slow the rate down to be just right.
I'll need somebody to test this game on a real CoCo 3 in a few
days. That version will have the tester's name encrypted in the code
and displayed in the title screen. The purpose of this test is
mainly to see if there is any flicker on the real hardware. With the
way I have set the game to SYNC with the rising edge of the 60hz
flag, it should be fine, but I want to make sure.
I may be able to sneak in a few extra features before releasing the
game, but it depends on what they are. Sling an idea my way and
we'll see, but I want to get this game DONE now.
Also... the Super CoCo Archive DVD orders are still being processed
after several weeks of a delay due to my job robbing me of at least
12 hours a day and depriving me of any sleep over 3 hours a night
during the UPS Xmas/New Years season. Bad weather up North caused
major problems with backflow at our center down South and this
reflected in a major way on my web site duties. Things are calm now
and I'm putting in some hours at the keyboard and DVD burner.
If you ordered a DVD, I know about it and yours will be delivered in
turn, and a groups of DVDs will go out each day until I complete the orders.
If you need to ask a question about any of this, please write me
privately at operator at coco3.com and I'll try to estimate your delivery date.
Thanks, and Happy CoCoing.
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