I am creating a platform game in school and I have almost everything working except for my enemy. I have watched tutorials on how to get the enemy to run back and forth on he platform but for some reason, when I place my enemy onto the platform, it runs really really slowly to one side of the platform, and then runs the other way but at the same time, it shifts from facing left to right and plays the animation really fast. It has nothing to do with the speed at the moment, something else is wrong as the images of the enemy keep changing directions. I'm not sure what is wrong with my code. Here is the enemy's code:
import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
/**
* Write a description of class Monster here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class Monster extends Actor
{
private int vSpeed = 0;
private int acceleration = 2;
private int spriteHeight = getImage().getHeight();
private int spriteWidth = getImage().getWidth();
private int lookForGroundDistance = (int)spriteHeight/2;
private int lookForEdge = (int)spriteWidth/2;
private int speed = 1;
int frame = 0; //keeps track of image shown
private int animationCounter = 0;
private GreenfootImage monster = new GreenfootImage("Monster.png");
private GreenfootImage monster2 = new GreenfootImage("Monster2.png");
private GreenfootImage monster3 = new GreenfootImage("Monster3.png");
private GreenfootImage monster4 = new GreenfootImage("Monster4.png");
private GreenfootImage monster5 = new GreenfootImage("Monster5.png");
private GreenfootImage monster6 = new GreenfootImage("Monster6.png");
private GreenfootImage monster7 = new GreenfootImage("Monster7.png");
private GreenfootImage monsterl = new GreenfootImage("Monsterl.png");
private GreenfootImage monster2l = new GreenfootImage("Monster2l.png");
private GreenfootImage monster3l = new GreenfootImage("Monster3l.png");
private GreenfootImage monster4l = new GreenfootImage("Monster4l.png");
private GreenfootImage monster5l = new GreenfootImage("Monster5l.png");
private GreenfootImage monster6l = new GreenfootImage("Monster6l.png");
private GreenfootImage monster7l = new GreenfootImage("Monster7l.png");
/**
* Act - do whatever the Monster wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
checkFall();
move();
if(speed<0)
{
if(animationCounter % 4 == 0)
{
animateLeft();
}
}
else
{
if(animationCounter % 4 == 0)
{
animateRight();
}
}
animationCounter ++; //count up by one*/
}
public void move()
{
Actor ground = getOneObjectAtOffset(lookForEdge, lookForGroundDistance, platform.class);
if(ground == null)
{
speed *= -1;
lookForEdge *= -1;
}
else
{
move(speed);
}
}
public void animateLeft()
{
if(frame == 0)
{
setImage(monsterl);
}
else if(frame == 1)
{
setImage(monster2l);
}
else if(frame == 2)
{
setImage(monster3l);
}
else if(frame == 3)
{
setImage(monster4l);
}
else if(frame == 4)
{
setImage(monster5l);
}
else if(frame == 5)
{
setImage(monster6l);
}
else if(frame == 6)
{
setImage(monster7l);
frame = 0;
}
frame ++; //add one frame to itself
}
public void animateRight()
{
if(frame == 0)
{
setImage(monster);
}
else if(frame == 1)
{
setImage(monster2);
}
else if(frame == 2)
{
setImage(monster3);
}
else if(frame == 3)
{
setImage(monster4);
}
else if(frame == 4)
{
setImage(monster5);
}
else if(frame == 5)
{
setImage(monster6);
}
else if(frame == 6)
{
setImage(monster7);
frame = 0;
}
frame ++; //add one frame to itself
}
public void fall()
{
setLocation(getX(), getY() + vSpeed);
if(vSpeed <=9)
{
vSpeed = vSpeed + acceleration; //falls down 2 pixels per cycle
}
}
public boolean onGround()
{
int spriteHeight = getImage().getHeight();
int yDistance = (int) (spriteHeight/2) + 5; //look for ground 5 pixels below character
Actor ground = getOneObjectAtOffset(0, getImage().getHeight()/2, platform.class);
if(ground == null)
{
return false;
}
else
{
moveToGround(ground);
return true;
}
}
public void moveToGround(Actor ground)
{
int groundHeight = ground.getImage().getHeight();
int newY = ground.getY() - (groundHeight + getImage().getHeight())/2;
setLocation(getX(), newY);
}
public void checkFall()
{
if(onGround())
{
vSpeed =0; //If the player is on the ground(platform), vertical speed will stop
}
else
{
fall();
}
}
}