Jumping

[Bhaliar]

Okay, so I have tried and successfully failed to make a code that allows a player to jump. I don't mean where you can go straight up and move over at the same time. I mean like he jumps up and over a specific amount. My main problem is i try to do it using a pixel on the graph, and I also use collision detection and make a stair like thing. What is the recommended way to check if you are colliding with something as you go down, and jumping up and over?

[tifreak8x]

Are you using any standard of map collision detection already? That would be the easiest way. Otherwise, you would need to utilize Pxl-test( I believe it is.

I personally would make it easier on myself and have some form of string 'map' to do the detecting for me.

[Deep Thought]

Don't really understand what you're asking, but here's my version of it.
I used to use map collision, but when I'm using graphscreen graphics, it gets really messy. Instead, this is my general jump/fall routine:

1. Check for [tt]getKey=24[/tt] or [tt]getKey=26[/tt] and move accordingly, but don't change the display yet.
2. Check for [tt]getKey=25[/tt] and the pixels underneath the character to be 0 (it doesn't make sense to jump from thin air to another layer of thin air) and [tt]U=0[/tt] (you'll see). If the [tt] and [/tt] combination is true, assign the number of blocks you want to jump up (say, 3) to some real variable like [tt]U[/tt], but don't move or change the display yet.
3. Check to see if [tt]U[/tt] is positive. If it is, it means that during the past, say, 3 passes, the UP key was pressed, so the character's still going up. Decrease [tt]U[/tt] by one and move accordingly, but don't change the display yet.
4. Check to see if the pixels underneeath the character are 0 and if [tt]U[/tt] is also equal to zero (you don't want to fall if you're still jumping). If so, move accordingly.
5. Now change the display to account for all that at once.

[Babyboy]

hmm... this one could be fun, although im sure it will end up slow.

if the x is always going to be the same change, then you can use it as a constant for your equation

the Y is where it gets fun. have you thought of utilizing the inherent up/down nature of a quadratic function?

-Ax^2+B would give you a curve, change A to make it wider (inverse to number size, 1 will be wider than 4 generally but is dependent on the B number for actual movement.)

B is as high as your character will get.

take the table of x^2 use it as your X and Y, just make sure your X does not go below 0 (if on flat land)

christ it has been a long time... umm... encase it all in a "While pxl-test(X spot in table+1, Y spot in table+1) does not = 1
to make sure that you arent running into anything BEFORE you move, if it comes back as solid it will break the loop. just make sure you have a solid floor
otherwise it will continue going down the table and move you further.

the idea is to get the Y in Y=Ax^2+Bx to be the distance you jump. but with the +B you can change how high he jumps without affecting the X movement.


this may be really fragmented. so RFC? i think there is something here though, and it would be faster than using if statements to determine max height.




















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[Xeda112358]

Sorry, I deleted the double post :/