Hello! I'm trying to build a stick figure platformer game, but whenever I try to program a double jump function, my player just loses his ability to jump entirely. Here's the code for the actor class:
I believe the problem is in the if onPlatform == true section
import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
/**
* Write a description of class Runner here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class Runner extends Actor
{
private int vSpeed = 0;
private int acceleration = 1;
private int jumpHeight = -13;
private boolean hasStarted = false;
private int jumpCount = 0;
private GreenfootImage run1 = new GreenfootImage("rsz_frame_1.png");
//run1.scale(run1.getWidth() / 2, run1.getHeight() / 2);
private GreenfootImage run2 = new GreenfootImage("rsz_frame_2.png");
private GreenfootImage run3 = new GreenfootImage("rsz_frame_3.png");
private GreenfootImage run4 = new GreenfootImage("rsz_frame_4.png");
private int animationCounter = 0;
private int frame = 1;
//ADDED CODE
private boolean jumped = false;
public Runner() {
//getImage().scale(getImage().getWidth() / 2,getImage().getHeight() / 2);
}
/**
* Act - do whatever the Runner wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
while (hasStarted == false) {
if (Greenfoot.isKeyDown("w")) {
hasStarted = true;
}
}
moveAround();
checkFalling();
if (onPlatform() == true) {
move(-3);
if (Greenfoot.isKeyDown("space")) {
vSpeed = jumpHeight;
jumped = true;
fall();
}
}
if (onPlatform() == false) {
move(-3);
if (Greenfoot.isKeyDown("space") && jumped == true) {
vSpeed = jumpHeight + 7;
fall();
jumped = false;
}
}
if (getY() > 510) {
Greenfoot.stop();
}
animationCounter++;
}
public void moveAround() {
if (Greenfoot.isKeyDown("d")){
move(7);
if (animationCounter % 4 == 0)
{
animateRight();
}
}
if (Greenfoot.isKeyDown("a")){
move(-7);
}
}
private void fall() {
setLocation(getX(), getY() + vSpeed);
vSpeed = vSpeed + acceleration;
}
public boolean onPlatform() {
Actor under = getOneObjectAtOffset(0, getImage().getHeight()/2, Platform.class);
if (under != null) {
return true;
} else {
return false;
}
}
public void checkFalling() {
if (onPlatform() == false) {
fall();
}
}
public void animateRight()
{
if (frame == 1)
{
setImage(run1);
}
else if (frame == 2)
{
setImage(run2);
}
else if (frame == 3)
{
setImage(run3);
}
else if (frame == 4)
{
setImage(run4);
frame = 1;
return;
}
frame++;
}
}