import java.util.*;
import greenfoot.*;




| The class Mover provides some basic movement methods. Use this as a superclass for other actors that should be able to move left and right, jump up and fall down.
|
public class Mover
extends Actor
{    


| Gravity (acceleration downwards)
|
private static final int acceleration = 2;
    

| Running speed (sidewards)
|
private static final int speed = 7;
    
    

| Current vertical speed
|
private int vSpeed = 0;

    




    public void moveRight()
    {
        setLocation(getX() + speed, getY());
    }

    




    public void moveLeft()
    {
        setLocation(getX() - speed, getY());
    }

    




    public boolean onGround()
    {
        Object under = getOneObjectAtOffset(0, getImage().getHeight() / 2 - 8, null);
        return under != null;
    }

    




    public void setVSpeed(int speed)
    {
        vSpeed = speed;
    }

    




    public void fall()
    {
        setLocation(getX(), getY() + vSpeed);
        vSpeed = vSpeed + acceleration;
        if (atBottom()) {
            gameEnd();
        }
    }

    




    public boolean atBottom()
    {
        return getY() >= getWorld().getHeight() - 2;
    }

    




    public void gameEnd()
    {
        Greenfoot.stop();
    }
}