Hi, does anyone know how to make a side-scrolling platform game? Here is my code so you can help me in context. I have 2 worlds, CharSelect and Game, I also have a projectile, a ground class with two subclasses, and 1 hero and globals class. Here is the code fo CharSelect Here is the code for Game
And here is the code for Hero
public class CharSelect extends World
{
/**
* Constructor for objects of class CharSelect.
*
*/
public CharSelect()
{
super(600, 400, 1);
addObject(Globals.h, 300, 255);
prepare();
}
public void act()
{
if (Greenfoot.isKeyDown("1"))
{
Globals.h.changeImage(1);
}
else if (Greenfoot.isKeyDown("2"))
{
Globals.h.changeImage(2);
}
else if (Greenfoot.isKeyDown("3"))
{
Globals.h.changeImage(3);
}
else if (Greenfoot.isKeyDown("4"))
{
Globals.h.changeImage(4);
}
else if (Greenfoot.isKeyDown("space"))
{
Greenfoot.setWorld(new Game());
}
}
/**
* Prepare the world for the start of the program.
* That is: create the initial objects and add them to the world.
*/
private void prepare()
{
}
}
public class Game extends World
{
private int speed = 7;
private int vSpeed = 0;
private int acceleration = 1 ;
private int jumpStrenght = -6;
/**
* Constructor for objects of class Game.
*
*/
public Game()
{
// Create a new world with 600x400 cells with a cell size of 1x1 pixels.
super(1000, 700, 1,false);
addObject(Globals.h, 50, 400);
addObject(new Long(), 190, 654);
addObject(new Hump(), 618, 575);
}
}
public class Hero extends Actor
Thanks in advance!
{ GreenfootImage i1 = new GreenfootImage("wizard_1.png");
GreenfootImage i2 = new GreenfootImage("princess.png");
GreenfootImage i3 = new GreenfootImage("goblin_2.png");
GreenfootImage i4 = new GreenfootImage("barbarian_1.png");
int vSpeed = 0;
int acceleration = 1;
int speed = 7;
int jumpStrenght = -6;
/**
* Act - do whatever the Hero wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act ()
{
if (getWorld() instanceof CharSelect) return;
checkKeys();
checkFall();
landOnTop();
fireProjectile();
}
public void fireProjectile()
{
if(Greenfoot.isKeyDown("down"))
{
getWorld(). addObject(new Projectile(), getX(), getY());
Projectile projectile = new Projectile();
}
}
private void checkKeys()
{ if(Greenfoot.isKeyDown("left"))
{
moveLeft();
}
if(Greenfoot.isKeyDown("right"))
{
moveRight();
}
if(Greenfoot.isKeyDown("up"))
{
jump();
}
}
public void checkFall()
{
if (onGround())
{
vSpeed = 0;
}
else{
fall();
}
}
public void jump()
{
vSpeed= jumpStrenght;
fall();
}
public boolean onGround()
{
Actor under = getOneObjectAtOffset( 0,getImage().getHeight()/4,Ground.class);
return under !=null;
}
public void landOnTop()
{
if (isTouching(Ground.class))
{
setLocation(getX(), getY() - 1);
}
}
public void moveRight()
{
setLocation (getX() + speed,getY() );
}
public void moveLeft()
{
setLocation (getX() - speed,getY());
}
public void fall()
{
setLocation (getX(),getY()+vSpeed);
vSpeed = vSpeed + acceleration;
}
public Hero()
{
setImage(i1);
}
public void changeImage (int x)
{
if (x == 1)
{
setImage(i1);
}
if (x == 2)
{
setImage(i2);
}
if (x == 3)
{
setImage(i3);
}
if (x == 4)
{
setImage(i4);
}
}
}