Well, yesterday i was attempting to make a program in Axe that used realistic gravity (like in Portal and Mario) to make a box jump around on command. Unfortunately, i somehow forgot my gravity formula that i'd used in an earlier program in BASIC that did the same thing, and i've since had so many ram clears (lol) that i've lost that program :'( .

I must be retarded or something because its very simple, but i tried for hours yesterday to remember the formula for realistic jumping gravity, and ended up listening to my ipod and not paying attention in class. I have very bad ADD, and i blame that for my inability to figure anything out lol.

So yeah, i need some help figuring this out.

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

You mean my code? I tested it on my calculator and it appears to work fine.

One thing I have troubles with with gravity is checking if I am touching a wall or the ground, but making sure I won't slightly go through it or end up bouncing a few pixels before reaching it. In Super Sonic Ball you could notice that issue in screenshots, although that game was meant to be simple and as fast as possible, so I did not mind much.