wouldnt it be easier to rewrite onGround?
JetLennit wrote ...
2013/3/29
Jump code..
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danpost ur the great
i always do jumps with square functions like -x² + c :
c is the height of the jump and x must be set to the negative zero point of the graph
Pointifix wrote...
i always do jumps with square functions like -x² + c :
c is the height of the jump and x must be set to the negative zero point of the graphif you add c with like 100 the graph will be 100 at the x = 0 point, but the graph cuts the x-axis two times, once in the negative and once in the positive side, this are the point where the jump begin and ends.
danpost wrote...
A simple jump/gravity code would be
import greenfoot.*
public class Jumper extends Actor
{
private int ySpeed;
public Jumper()
{
}
public void act()
{
int groundLevel = getWorld().getWidth() - getImage().getHeight()/2;
boolean onGround = (getY() == groundLevel);
if (!onGround) // in middle of jump
{
ySpeed++; // adds gravity effect
setLocation(getX(), getY()+ySpeed); // fall (rising slower or falling faster)
if (getY()>=groundLevel) // has landed (reached ground level)
{
setLocation(getX(), groundLevel); // set on ground
Greenfoot.getKey(); // clears any key pressed during jump
}
}
else // on ground
{
if ("space".equals(Greenfoot.getKey())) // jump key detected
{
ySpeed = -15; // add jump speed
setLocation(getX(), getY()+ySpeed; // leave ground
}
}
}
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