<iframe width='500px' height='400px' src='https://nest.ktbyte.com/nest#81281' allowfullscreen></iframe>

//Declares Fisica variables
FWorld world;
FBox platform;
FBox player;

boolean left, right, onGround;

void setup() {
    size(800, 400); //Creates canvas
    
    Fisica.init(this); //Initiates Fisica library
    
    world = new FWorld(); //Instantiates world as FWorld()
    world.setEdges(); //Sets edges of the screen to physical border
    
    player = new FBox(30, 30);
    player.setRotatable(false);
    player.setPosition(width / 2, height / 8);
    
    platform = new FBox(width, 30);
    platform.setPosition(width / 2, height * 0.8);
    platform.setStatic(true); //Sets "platform" to static (won't be affected by forces such as gravity
    
    //Adds content to world.
    world.add(player);
    world.add(platform);
}

void draw() {
    background(30); //Sets background to grey, clears previous content

    fill(255);

    text("A & D to move left & right", 10, 15);
    text("Space to jump", 10, 30);

    platformCheck(); //Detects whether or not player is touching platform.
    
    world.step(); //Moves "world" forward by 1/60th of a second
    world.draw(); //Draws all content contained in "world"

    if (left) {
        player.setVelocity(-100, player.getVelocityY()); //Moves player left
    }

    if (right) {
        player.setVelocity(100, player.getVelocityY()); //Moves player right
    }
}

void platformCheck() {
    //Keeps track of if the player touching platform for ease of access
    if (player.isTouchingBody(platform)) {
        onGround = true;
    } else {
        onGround = false;
    }
}

void keyPressed() {
    //Keeps track if player is moving left or right
    if (key == 'a' || key == 'A') {
        left = true;
    }

    if (key == 'd' || key == 'D') {
        right = true;
    }

    if (key == ' ' && onGround) {
        player.addForce(0, - (player.getMass() * 10000)); //Makes player jump
    }
}

void keyReleased() {
    //Keeps track if player is going left & right, if not it slows down player quickly
    if (key == 'a' || key == 'A') {
        left = false;
        player.setVelocity(player.getVelocityX() * 0.5, player.getVelocityY()); //Reduces player's velocity by half
    }

    if (key == 'd' || key == 'D') {
        right = false;
        player.setVelocity(player.getVelocityX() * 0.5, player.getVelocityY()); //Reduces player's velocity by half
    }
}