Donkey Kong

snowman_hater · Post by **snowman_hater** » Mon 26 Mar, 2007 3:05 am

Ok, I'm working with papersnowman on a new project now, donkey kong. It will be a tilemapped side-scroller. I have written the scrolling engine so far. It masks the tilemapped foreground on top of a rotating background. I will later release the engine so it can be used by anyone.

PS: Pardon the choppyness of the SS, calccapture is just hateful like that :/
EDIT: I've timed the engine to about 500,000 CC's per frame, giving it a framerate of about 12. This isn't too bad, but I'll definitely come back to it, making optimizations wherever I can.

Post by **tr1p1ea** » Mon 26 Mar, 2007 3:08 am

Looking pretty sweet so far! So this will play like the Donkey Kong Country games i take it? Great idea since i dont think anyone has attempted to make such a game for the 83+ or what not.

snowman_hater · Post by **snowman_hater** » Mon 26 Mar, 2007 3:15 am

Erm, it will have the DK country level-sets, but will look more like DK Land for the GB, since it's in monochrome, and [to my knowledge] the SNES doesn't have a z80

Halifax · Post by **Halifax** » Mon 26 Mar, 2007 8:58 pm

you that looks pretty sweet. I am not an expert on Donkey Kong but doesn't it have physics, and if it does will this be a physics engine??

Super Speler · Post by **Super Speler** » Mon 26 Mar, 2007 9:10 pm

Really nice, DK is one of the games the 83+ series needs.

Liazon · Post by **Liazon** » Mon 26 Mar, 2007 9:15 pm

sounds cool. the SNES versions were awesome.

snowman_hater · Post by **snowman_hater** » Tue 27 Mar, 2007 5:32 am

you that looks pretty sweet. I am not an expert on Donkey Kong but doesn't it have physics, and if it does will this be a physics engine??

I won't have anything as far as acceleration goes, but I will definitely play with the falling rate to make it somewhat realistic. Any sort of heavy calculations would take too much processing power. One of the things that will present a challenge will be making the falling rate for scrolling frames match the falling rate for non-scrolling frames, since non-scrolling frames take 500,000 CC's less than scrolling frames 0.o

Halifax · Post by **Halifax** » Wed 28 Mar, 2007 1:42 am

oh ok cool. And I don't know if you consider this heavy calculations but...

*Halifax points to Sonic physics engine for the TI 83+

snowman_hater · Post by **snowman_hater** » Wed 28 Mar, 2007 4:45 am

Update: I've made some optimizations, and cut the routine down to 450,000 CC's giving it a framerate of about 13 fps. The speed increase is a bit noticable in this pic.

Special thanks to dwedit, since i'm using the splash from bubble bobble

Post by **tr1p1ea** » Wed 28 Mar, 2007 6:45 am

Cool, looks great so far. Glad to see you shaving off those cycles

.

Is your tilemap routine restricted to scrolling 1 pixel at a time, or is it variable? Support for animated tiles? Or wont you need them?

snowman_hater · Post by **snowman_hater** » Wed 28 Mar, 2007 9:04 am

It's definitely variable. It technically doesn't scroll, it just plots based on a tilemap offset in bc, so the incrementation could easily be changed. No idea whether or not I'll have animated tiles.
In fact, scrolling by 2 pixels on the tilemap, but only rotating the background once gives an interesting effect. Thanks for the tip

Post by **tr1p1ea** » Wed 28 Mar, 2007 9:47 am

Cool, variable (plotting based on offset) is my preferred way as well.

Scrolling at different rates gives a really cool effect indeed

.

anykey · Post by **anykey** » Thu 29 Mar, 2007 12:34 am

oooooooooooooooooooooooooooh.
I want it.

Halifax · Post by **Halifax** » Thu 29 Mar, 2007 12:42 am

looks good. Very smooth.

merthsoft · Post by **merthsoft** » Thu 29 Mar, 2007 3:09 am

The two pixel scrolling looks a lot smoother than the one, and the parallax effect is really neat.