No errors and not working

Epicman123456 · May 2016

Hello, I am making my own version of space invaders for a school project. I am having issues getting this code to actually work. P5 isn't showing errors in the code, but it does show a suggestion to use [ ] instead of () (See code for the lines I'm referring to). When i switch to the square brackets, it shows an error. I'm not sure whats going on with that. Any help is appreciated. Thanks!!

//initializes bullets
var bullets = {
    x: new Array(),
    y: new Array(),
    shot: new Array()
}
//initializes the ship
var ship = {
    x: 625,
    y: 475,
    photo: loadImage("download.png")
}

function setup() {
  createCanvas(1350,650);

  //bullet1
  append(bullets.x, ship.x);
  append(bullets.y, ship.y);
  append(bullets.shot, false);

  //bullet2
  append(bullets.x, ship.x);
  append(bullets.y, ship.y);
  append(bullets.shot, false);

  //bullet3
  append(bullets.x, ship.x);
  append(bullets.y, ship.y);
  append(bullets.shot, false);
}

//Controls
function updateShip()
{
    //Right movement
    if (keyIsDown(RIGHT_ARROW)) {
        ship.x = ship.x+ 10;
        if (ship.x >= 1350) {
            ship.x = ship.x - 11;
        }
    }
    //Left movement
    if (keyIsDown(LEFT_ARROW)) {
        ship.x = ship.x - 10;
        if (ship.x <= 0) {
            ship.x = ship.x + 11;
        }
    }
    //Up movement
    if (keyIsDown(UP_ARROW)) {
        ship.y = ship.y - 10;
        if (ship.y <= 350) {
            ship.y = ship.y + 11;
        }
    }
    //Down movement
    if (keyIsDown(DOWN_ARROW)) {
        ship.y = ship.y + 10;
        if (ship.y >= 580) {
            ship.y = ship.y - 11;
        }
    }
}

function drawShip()
{
    ship.photo.resize(75,75);
    image(ship.photo,ship.x-ship.photo.width/2,ship.y+ship.photo.height/2);
}

//Drawing the bullets
function drawBullets() {
    fill(255);
    rect(bullets.x[0],bullets.y[0], 5, 10);
    rect(bullets.x[1],bullets.y[1], 5, 10);
    rect(bullets.x[2],bullets.y[2], 5, 10);
}

//Controls the bullet movement
function updateBullets() {
    bullets.y[0] = bullets.y[0] + 10;
}

//Checks if bullet is shot
function checkShoot() {
    if (keyIsPressed && keyCode === 32) {
        bullets.y[0] = ship.y;
    }
}

function draw() {
    background(0);

    updateShip();
    drawShip();
    checkShoot();
    updateBullets();
    drawBullets();
}

Epicman123456 · May 2016

HI

GoToLoop · May 2016

https://forum.Processing.org/two/discussion/15473/readme-how-to-format-code-and-text

Epicman123456 · May 2016

bump. (if that works)

GoToLoop · May 2016

In p5.js, we can't use its API, like loadImage(), before setup() or preload() starts:

http://p5js.org/reference/#/p5/preload

blindfish · May 2016

Agree with @GoToLoop that your loadImage before setup is an issue. Easily remedied - since you have the object in place you can later (in preload or setup) use:

ship.photo = loadImage("download.png");

Epicman123456 · May 2016

Thanks for all the help guys!

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