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Index › Discussion › Exhibition › help with motion
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help with motion (Read 770 times)
surfguy66
help with motion
May 23rd, 2009, 3:27pm  
I'm trying to make a snake game in which the snake is controlled by the arrow keys.  The only tutorials i can find only offer example code where motion of objects only follows the mouse cursor.  Does anyone know how to make the motion dictated by the arrow keys?
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V
Re: help with motion
Reply #1 - May 23rd, 2009, 4:26pm  
there is a keyPressed() function you use to get keyboard input

for the snake just use the arrows input to set a direction:

UP arrow would set yvel = -1;
DOWN arrow would set yvel = 1;
LEFT arrow would set xvel = -1;
RIGHT arrow would set xvel = 1;

so,

void keyPressed()
{
 if( keyCode == UP )
   yvel = -1;
 // do the same for other directions
}

your main loop:
xpos += xvel;
ypos += yvel;

enjoy
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Victor Martins | www.pixelnerve.com/v
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PhiLho 
Re: help with motion
Reply #2 - May 24th, 2009, 1:02am  
Just a word: don't take blindly the first sub-forum you find, take time to read their descriptions and find the right one to ask questions...
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