import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Write a description of class Assassin here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class Assassin extends ScrollActor
{
    int speed = 5;
    int gravity = 10;
    int vertSpeed;
    /**
     * Act - do whatever the Assassin wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        move();
        jump();
    }    

    public void move()
    {
        if (Greenfoot.isKeyDown("right")) {
            // move the camera forwards, actor moves with the camera by default
            getWorld().moveCamera(speed);
        }
        if (Greenfoot.isKeyDown("left")) {
            // move the camera backwards, actor moves with the camera by default
            getWorld().moveCamera(-speed);
        }
    }

    public void jump()
    {
        if(onGround()){
            if(Greenfoot.isKeyDown("up") || Greenfoot.isKeyDown( "space")){
                setLocationFromCamera(getXFromCamera(), getYFromCamera() - 10*gravity);
            }            
        }
        else{
            fall();
        }
    }

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

    public void fall()
    {
        setLocationFromCamera(getXFromCamera(), getYFromCamera() + gravity);
    }
}