# Direction while Jumping (tile based game)

**URL:** https://forum.kirupa.com/t/direction-while-jumping-tile-based-game/216378
**Category:** programming
**Created:** [February 15, 2007, 11:22pm UTC](https://forum.kirupa.com/t/direction-while-jumping-tile-based-game/216378 "2007-02-15T23:22:10Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![rhine](https://avatars.discourse-cdn.com/v4/letter/r/aeb1de/32.png) [@rhine](https://forum.kirupa.com/u/rhine)
#### Post date: [February 15, 2007, 11:22pm UTC](https://forum.kirupa.com/t/direction-while-jumping-tile-based-game/216378/1 "2007-02-15T23:22:10Z")

</div>

Hey Everyone,

This seems like a simple question, but I can’t figure it out. I’ve been playing with [Tonypa’s tile-based game system](http://www.tonypa.pri.ee/tbw/start.html) and can’t figure out how to make the character sprite face the direction he jumps or falls in face the right direction.

Here’s the [game and source files](http://www.rhine.ca/flash/).

And here’s the source:

```
ActionScript Code:
[FONT=Courier New][LEFT][COLOR=#000000] **function** [/COLOR] moveChar[COLOR=#000000]([/COLOR]ob, dirx, diry, jump[COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
[COLOR=#808080]*// are we jumping?*[/COLOR]
[COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR][COLOR=#0000FF]Math[/COLOR].[COLOR=#0000FF]abs[/COLOR][COLOR=#000000]([/COLOR]jump[COLOR=#000000])[/COLOR] == [COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
    speed = ob.[COLOR=#000080]jumpspeed[/COLOR]*jump;
[COLOR=#000000]}[/COLOR] [COLOR=#0000FF]else[/COLOR] [COLOR=#000000]{[/COLOR]
    speed = ob.[COLOR=#000080]speed[/COLOR];
[COLOR=#000000]}[/COLOR]
[COLOR=#808080]*// vertical movement*[/COLOR]
[COLOR=#808080]*// where are our edges?*[/COLOR]
[COLOR=#808080]*// first we look for y movement, so x is old*[/COLOR]
getMyCorners[COLOR=#000000]([/COLOR]ob.[COLOR=#000080]x[/COLOR], ob.[COLOR=#000080]y[/COLOR]+speed*diry, ob[COLOR=#000000])[/COLOR];
[COLOR=#808080]*// move got dammit... and check for collisions.*[/COLOR]
[COLOR=#808080]*// going up*[/COLOR]
[COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]diry == -[COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
    [COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]ob.[COLOR=#000080]upleft[/COLOR] [COLOR=#0000FF]and[/COLOR] ob.[COLOR=#000080]upright[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
        [COLOR=#808080]*// no wall in the way, move on*[/COLOR]
        ob.[COLOR=#000080]y[/COLOR] += speed*diry;
    [COLOR=#000000]}[/COLOR] [COLOR=#0000FF]else[/COLOR] [COLOR=#000000]{[/COLOR]
        [COLOR=#808080]*// hit the wall, place char near the wall*[/COLOR]
        ob.[COLOR=#000080]y[/COLOR] = ob.[COLOR=#000080]ytile[/COLOR]*game.[COLOR=#000080]tileH[/COLOR]+ob.[COLOR=#0000FF]height[/COLOR];
        [COLOR=#808080]*// are we jumping around and have hit the tile above?*[/COLOR]
        ob.[COLOR=#000080]jumpspeed[/COLOR] = [COLOR=#000080]0[/COLOR];
    [COLOR=#000000]}[/COLOR]
[COLOR=#000000]}[/COLOR]
[COLOR=#808080]*// if going down*[/COLOR]
[COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]diry == [COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
    [COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]ob.[COLOR=#000080]downleft[/COLOR] [COLOR=#0000FF]and[/COLOR] ob.[COLOR=#000080]downright[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
        ob.[COLOR=#000080]y[/COLOR] += speed*diry;
    [COLOR=#000000]}[/COLOR] [COLOR=#0000FF]else[/COLOR] [COLOR=#000000]{[/COLOR]
        ob.[COLOR=#000080]y[/COLOR] = [COLOR=#000000]([/COLOR]ob.[COLOR=#000080]ytile[/COLOR]+[COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR]*game.[COLOR=#000080]tileH[/COLOR]-ob.[COLOR=#0000FF]height[/COLOR];
        ob.[COLOR=#000080]jump[/COLOR] = [COLOR=#000000] **false** [/COLOR];
    [COLOR=#000000]}[/COLOR]
[COLOR=#000000]}[/COLOR]
[COLOR=#808080]*// horisontal movement*[/COLOR]
[COLOR=#808080]*// changing x with speed and taking old y*[/COLOR]
getMyCorners[COLOR=#000000]([/COLOR]ob.[COLOR=#000080]x[/COLOR]+speed*dirx, ob.[COLOR=#000080]y[/COLOR], ob[COLOR=#000000])[/COLOR];
[COLOR=#808080]*// if going left*[/COLOR]
[COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]dirx == -[COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
    [COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]ob.[COLOR=#000080]downleft[/COLOR] [COLOR=#0000FF]and[/COLOR] ob.[COLOR=#000080]upleft[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
        ob.[COLOR=#000080]x[/COLOR] += speed*dirx;
        [COLOR=#808080]*// check for tile below*[/COLOR]
        fall[COLOR=#000000]([/COLOR]ob[COLOR=#000000])[/COLOR];
    [COLOR=#000000]}[/COLOR] [COLOR=#0000FF]else[/COLOR] [COLOR=#000000]{[/COLOR]
        ob.[COLOR=#000080]x[/COLOR] = ob.[COLOR=#000080]xtile[/COLOR]*game.[COLOR=#000080]tileW[/COLOR]+ob.[COLOR=#0000FF]width[/COLOR];
    [COLOR=#000000]}[/COLOR]
[COLOR=#000000]}[/COLOR]
[COLOR=#808080]*// if going right*[/COLOR]
[COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]dirx == [COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
    [COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]ob.[COLOR=#000080]upright[/COLOR] [COLOR=#0000FF]and[/COLOR] ob.[COLOR=#000080]downright[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
        ob.[COLOR=#000080]x[/COLOR] += speed*dirx;
        [COLOR=#808080]*// check for tile below*[/COLOR]
        fall[COLOR=#000000]([/COLOR]ob[COLOR=#000000])[/COLOR];
    [COLOR=#000000]}[/COLOR] [COLOR=#0000FF]else[/COLOR] [COLOR=#000000]{[/COLOR]
        ob.[COLOR=#000080]x[/COLOR] = [COLOR=#000000]([/COLOR]ob.[COLOR=#000080]xtile[/COLOR]+[COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR]*game.[COLOR=#000080]tileW[/COLOR]-ob.[COLOR=#0000FF]width[/COLOR];
    [COLOR=#000000]}[/COLOR]
[COLOR=#000000]}[/COLOR]
[COLOR=#808080]*// update char position*[/COLOR]
ob.[COLOR=#000080]clip[/COLOR].[COLOR=#0000FF]_x[/COLOR] = ob.[COLOR=#000080]x[/COLOR];
ob.[COLOR=#000080]clip[/COLOR].[COLOR=#0000FF]_y[/COLOR] = ob.[COLOR=#000080]y[/COLOR];
[COLOR=#808080]*// face the direction*[/COLOR]
ob.[COLOR=#000080]clip[/COLOR].[COLOR=#0000FF]gotoAndStop[/COLOR][COLOR=#000000]([/COLOR]dirx+diry*[COLOR=#000080]2[/COLOR]+[COLOR=#000080]3[/COLOR][COLOR=#000000])[/COLOR];
[COLOR=#808080]*// calculate the tile where chars center is*[/COLOR]
ob.[COLOR=#000080]xtile[/COLOR] = [COLOR=#0000FF]Math[/COLOR].[COLOR=#0000FF]floor[/COLOR][COLOR=#000000]([/COLOR]ob.[COLOR=#000080]clip[/COLOR].[COLOR=#0000FF]_x[/COLOR]/game.[COLOR=#000080]tileW[/COLOR][COLOR=#000000])[/COLOR];
ob.[COLOR=#000080]ytile[/COLOR] = [COLOR=#0000FF]Math[/COLOR].[COLOR=#0000FF]floor[/COLOR][COLOR=#000000]([/COLOR]ob.[COLOR=#000080]clip[/COLOR].[COLOR=#0000FF]_y[/COLOR]/game.[COLOR=#000080]tileH[/COLOR][COLOR=#000000])[/COLOR];
[COLOR=#808080]*// check for door*[/COLOR]
[COLOR=#0000FF]if[/COLOR] [COLOR=#000000]([/COLOR]game[COLOR=#000000][[/COLOR][COLOR=#FF0000]"t_"[/COLOR]+ob.[COLOR=#000080]ytile[/COLOR]+[COLOR=#FF0000]"_"[/COLOR]+ob.[COLOR=#000080]xtile[/COLOR][COLOR=#000000]][/COLOR].[COLOR=#000080]door[/COLOR] [COLOR=#0000FF]and[/COLOR] ob == [COLOR=#0000FF]_root[/COLOR].[COLOR=#000080]char[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR]
    [COLOR=#808080]*// make new map*[/COLOR]
    changeMap[COLOR=#000000]([/COLOR]ob[COLOR=#000000])[/COLOR];
[COLOR=#000000]}[/COLOR]
[COLOR=#0000FF]return[/COLOR] [COLOR=#000000]([/COLOR][COLOR=#000000] **true** [/COLOR][COLOR=#000000])[/COLOR];

```

[COLOR=#000000]}[/COLOR]  
[COLOR=#000000] **function** [/COLOR] jumpCOLOR=#000000[/COLOR] [COLOR=#000000]{[/COLOR]  
[COLOR=#808080]_// gravity control_[/COLOR]  
ob.[COLOR=#000080]jumpspeed[/COLOR] = ob.[COLOR=#000080]jumpspeed[/COLOR]+ob.[COLOR=#000080]gravity[/COLOR];  
[COLOR=#0000FF]if[/COLOR] COLOR=#000000[/COLOR] [COLOR=#000000]{[/COLOR]  
ob.[COLOR=#000080]jumpspeed[/COLOR] = game.[COLOR=#000080]tileH[/COLOR]-char.[COLOR=#0000FF]height[/COLOR];  
[COLOR=#000000]}[/COLOR]  
[COLOR=#0000FF]if[/COLOR] COLOR=#000000[/COLOR] [COLOR=#000000]{[/COLOR]  
[COLOR=#808080]_// going up_[/COLOR]  
moveChar[COLOR=#000000]([/COLOR]ob, [COLOR=#000080]0[/COLOR], -[COLOR=#000080]1[/COLOR], -[COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR];  
[COLOR=#000000]}[/COLOR] [COLOR=#0000FF]else[/COLOR] [COLOR=#0000FF]if[/COLOR] COLOR=#000000[/COLOR] [COLOR=#000000]{[/COLOR]  
[COLOR=#808080]_// going down_[/COLOR]  
moveChar[COLOR=#000000]([/COLOR]ob, [COLOR=#000080]0[/COLOR], [COLOR=#000080]1[/COLOR], [COLOR=#000080]1[/COLOR][COLOR=#000000])[/COLOR];  
[COLOR=#000000]}[/COLOR]  
[COLOR=#0000FF]return[/COLOR] COLOR=#000000[/COLOR];  
[COLOR=#000000]}[/COLOR]  
[/LEFT]  
[/FONT]

Thanks guys!