Simple Jump 'n' Run

gas01ine · Post by **gas01ine** » Sat Aug 02, 2003 5:22 pm

I just started out with PB and encountered some problems making a simple Jump 'n' Run. Maybe some of you could help me....

Just imagine an good ol' Super Mario JnR

1. Collision
Is there a way to check the collision only on the top of each sprite? I mean if an enemy sprite hits you from the left or right the player should die but if you jump on it, the enemy should die.

2. Gravity
I solved the jumping via a sin(angle) but thats not the fat of the land actually. Especially when the player drops from a high block

3. Levels
I think tilemap-levels do best in my case. But i have no idea how to realize it. I thought of Mappy, but there are no PB-libs or anything like that on their homepage.

And PB has to check all sprites (+ animations) for collisions and stuff and i suppose this uses a LOT of CPU time if the whole level plus collisions for the coins the player collects, the movement of the enemies and stuff like that.

Thanks in advance. I hope someone has some nice lines of code to help me out

Greetings
gas01ine

Flype · Post by **Flype** » Sat Aug 02, 2003 7:58 pm

hello,

About the tiles scroller, i've just made one which works very nicely (smooth, low cpu comsuption and comprehensive -i hope -). As my source code make use of some pictures, i can't post it here. So send me an email here : flipemaillist@altern.org

My piece of code was quite design to work with Mappy .MAP file format... Also, the scroller can support multidirectionnal - 32x32 - animated tiles. It "should" work also with 16x16 or any size. But you should have the "PureTools_I purebasic library coded by Danilo" for the animated feature.
As i just started to code it yesterday (lukky man

) my piece of code isn't in any way a Mappy PBLib style, and will never be i think. But source code is very similar to C generated one by Mappy which is optimized enough. So go for it and ask me for any question on how to embed it into your project.

Flype · Post by **Flype** » Sat Aug 02, 2003 8:10 pm

about collision :
Resultat = SpritePixelCollision(#Sprite1, x1, y1, #Sprite2, x2, y2) may be one way to do it...

i suppose this uses a LOT of CPU time

Yes of course but if you code it well enough it will be ok. I tested heavy calculations and hundred sprites displayed at same time. Purebasic is really fast, impressive... For instance, i tested my scroller with more than 800 sprites on screen at 60 frame per secondes (in 640x480x16bit), so don't be worried about it

Flype · Post by **Flype** » Sat Aug 02, 2003 8:44 pm

ho by the way, you should download this lib by Danilo which offers you a complete set of functions for animated sprites... Use it and you will be surprise of its simplicity.
Direct download can be found in this post :
viewtopic.php?t=7046