Make a loop that constantly adds a velocity variable to the y-position variable, and if the object is not at rest, subtracts some value from the velocity variable every iteration. To jump, set the velocity variable to a positive value.

A basic example (also attached): Code: [Select] .GRAVTEST ClrDraw [FF818181818181FF]→Pic1 56→Y 0→V Repeat getKey(15) !If Y-56 0→V If getKey(54) 7→V End Else V-1→V End Pt-Change(44,Y-V→Y,Pic1) DispGraph Pt-Change(44,Y,Pic1) Pause 32 End

Pseudocode: Code: [Select] Header Clear screen Object sprite Initialize y position Initialize y velocity Until user presses clear   If object is at rest (bottom of screen)     Set velocity to zero     If user presses 2nd (jump)       Set velocity to a positive value     End   Else, object is not at rest     Decrease velocity   End   Update y position and draw sprite   Update screen   Clear sprite   Delay End

ok ive tried a version of the code above to make pretty good gravity...but the problem is that since doodler jumps down more that 4 pixels per frame sometimes, he skips through the platforms and does not hit them! can someone please help me avoid this?
what are other ways off simulating gravity??

UPDATES :
starting small:
scoring different
1 point for each platform that you pass
points keep adding up fast when you jetpack
New UFO ship:
appears every time you pass a hundred platform.
it shoots you and if you get hit...-25 points
Shooting: Doodler shoots! but only when UFO is there
if you hit a UFO, +50 points!
shooting still very primitive, will make it much better

take a look: watch for when the UFO appears when score=260 and 330-ish
this is the best i can do in Wabbitemu...on calc that UFO stands no chance

Sounds awesome yeah and jetpacking should be fast anyway I can't wait for a release

ty. finally someone cares lol. friedns at school awestruck
hmm...im thinking about slime volleyball with 4-level grayscale for my next game nice and simple

That looks excellent!  Nice job!

I really like the moving platforms.

thanks swear its faster on a calc gif slow...

edit: new gif: scored 400+ then landed on bomb
scond time i got further you can see some glitches like dots appearing in screen...when jetpacking

new updates:
so far its got:
jetpack: can use anytime by pressing 2nd, but you must use it while it lasts because it runs out as you keep jumping(dripping fuel)
bomb: they drop from nowhere and if they land on a platform and you happen to fall on it...-75 points
moving platforms: there are four platforms for each frame...as you score higher they start moving side to side one by one. very fun when they all move after you score 300+
slow scroll: if you collect this your jump hieght shortens and it scrolls slower as well...hindering your scoring...can be beneficial when platforms are not moving

i can add as many more items as i want: any special requests? thinking about space shuttle

anyway>>> i wanted to let you guys know my idea on how to make the scrolling work. there are four lines, each scroll down when you jump, when one of them hits the end of the screen, it goes back up on top of the screen but at a different random x position. it think its pretty sly and you cant tell that i did that
screenshots coming...also...i revised doodler so he looks much better. now he is 12*10 instead of 6*7 and has four legs now too

wow looks like 3 people started working on the same game at the same time...had no idea other ppl thought of this idea wow...good job...theirs also papi jump...

  im very sorry i didnt mean to harm anyone (i removed the accusation part). just here to improve my axing abilities