Hi,
i was making a simple game. After i put this code in, it jumps perfectly, however, if i hold down the space bar, my actor goes right up and when i let go, it comes back down again. Can anyone help with making the actor doing even jumps?
Nkhurshid2000 wrote ...
2014/4/1
Jumping on a simple game
THIS IS MY CODE
public class Man extends Actor
{
private int speed = 2; //movement speed
private int vSpeed = 0; //vertical speed
private int acceleration = 2; //gravity effect while falling
private int jumpStrength = -8;
public void act()
{
checkKeys();
checkFall();
jump();
}
public void checkKeys()
{
if( Greenfoot.isKeyDown("left"))
{
move(-5);
}
if(Greenfoot.isKeyDown("right"))
{
move(5);
}
if(Greenfoot.isKeyDown("up"))
{
jump();
}
}
public void jump()
{
if (Greenfoot.isKeyDown("space"))
{
vSpeed = jumpStrength;
fall();
}
}
public void fall()
{
setLocation(getX(), getY()+vSpeed);
vSpeed = vSpeed + acceleration;
}
public boolean onPlatform()
{
Actor under = getOneObjectAtOffset (0, getImage().getHeight()/2, Platform.class);
return under != null;
}
public void checkFall()
{
if (onPlatform())
{
vSpeed = 0;
}
else
{
fall();
}
}
You just need one more condition placed on jumping. Change the first line in your 'jump' method to:
1 | if (Greenfoot.isKeyDown("space") && onPlatform()) |
IT WORKED! Thanks a lot!
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