ARTG 2260

Professor Mark Sivak

Project 2

Tanya Kler

​

UFO Game:

Abduct the cows using the ufo and avoid the goats. Earn extra points by feeding the goats stars. 

​

- move mouse to move ufo

- click mouse to turn abduction light on

- type s key to launch stars

- use left and right arrow keys to switch sky modes

*/

​

// Sky color variables

  var blSky;

  var dusk;

  var sunset;

  var skies;

  var skyNum;

  var sky;

// animal variables

  var cow; //image

  var goat; //image

  let animals = [];

  let easy = 5;

  let hard = 20;

​

​

//stars

  let stars = [];

  let score = 0;

​

//button colors

  var button;

  var hover;

​

// images

  var ufo;

  var ufo1;

  var ufo2;

​

// game variables

  var easyMode;

  var hardMode;

  let stage = 1;

  let timer = 60;

​

//preload images to initialize image variables

function preload() {

  ufo1 = loadImage("ufo.png");

  ufo2 = loadImage("ufolight.png");

  cow = loadImage("cow.png");

  goat = loadImage("goat.png");

}

​

//set up canvas and initialize variables

function setup() {

  createCanvas(800, 800);

  //sky initializations

  blSky = color(84, 232, 255);

  dusk = color(36, 20, 219);

  sunset = color(255, 106, 0);

  skies = [];

  skies = [blSky, dusk, sunset];

  skyNum = 0;

  button = color(245, 66, 188);

  hover = color(236, 207, 255);

  //set initial ufo to ufo without light

  ufo = ufo1;

​

  easyMode = false;

  hardMode = false;

​

  //creates list of animals

  for (let i = 0; i < 4; i++) {

    if (i % 2 === 0) {  // adds a cow on even indices 

      animals[i] = new Animal(200 * (i + 1), easy, true, i + 1);

    } else {  // adds a goat on odd indices

      animals[i] = new Animal(200 * (i + 1), easy, false, i + 1);

    }

  }

}

​

//draw function to display game

function draw() {

  imageMode(CENTER);

  rectMode(CENTER);

  textAlign(CENTER);

  sky = skies[skyNum];

  background(sky);

  fill(0, 200, 0);

  noStroke();

  rect(400, 700, 800, 200); //grass

    switch(stage){

      case 1: // display easy and hard mode buttons 

        if (mouseX > 337 & mouseX < 463

            & mouseY > 275 & mouseY < 325) { //hovering over easy button

          fill(hover);

          rect(400, 300, 125, 50, 20);

          textSize(36);

          fill(0);

          text("easy", 400, 310)

          fill(button);

          rect(400, 375, 125, 50, 20);

          fill(255);

          text("hard", 400, 385);

        } else if (mouseX > 337 & mouseX < 463

                   & mouseY > 350 & mouseY < 400) {  //hovering over hard button

          fill(button);

          rect(400, 300, 125, 50, 20);

          textSize(36);

          fill(255);

          text("easy", 400, 310)

          fill(hover);

          rect(400, 375, 125, 50, 20);

          fill(0);

          text("hard", 400, 385);

        } else {  //mouse anywhere on screen other than buttons

          fill(button);

          rect(400, 300, 125, 50, 20);

          textSize(36);

          fill(255);

          text("easy", 400, 310)

          fill(button);

          rect(400, 375, 125, 50, 20);

          fill(255);

          text("hard", 400, 385);

        }

      break;

      case 2: //start game screen

        if (mouseX > 325 & mouseX < 475

            & mouseY > 362 & mouseY < 438) {  //if mouse hovering over start button

          fill(hover);

          rect(400, 400, 150, 75, 20);

          textSize(44);

          fill(0);

          text("start", 400, 413)

        } else {  //mouse anywhere else on screen

          fill(button);

          rect(400, 400, 150, 75, 20);

          textSize(44);

          fill(255);

          text("start", 400, 413)

        }

        stars = []; //reset stars to empty

      break;

      case 3:  // playing the game

        // draw and move animals

        for (let i = 0; i < 4; i++) { 

          let curr = animals[i];

          if (curr.isCow) {

            curr.move();

            image(cow, curr.x, curr.y, cow.width / 3, cow.height / 3);

          } else {

            curr.move();

            image(goat, curr.x, curr.y, goat.width / 3, goat.height / 3);

          }

        }

        //display and decrement timer

        textSize(44);

        fill(255);

        text(timer, 400, 150);

        text("score: " + score, 400, 200);

        if (frameCount % 60 == 0 && timer > 0) { //60 makes it close to a minute in chrome but much slower in safari 

          timer --;

        }

        //if timer is 0 game is done

        if (timer == 0) {

          stage++;

          text("game over", 400, 400);

          timer = 60;  //reset timer

        }

        //display moving stars and check for collisions with goats

        for (let i = 0; i < stars.length; i++) {

          stars[i].update();

          stars[i].display();

          for (let j = 0; j < 4; j++) { 

            if (!animals[j].isCow & !animals[j].hidden) {

              if(stars[i].x > animals[j].x - (goat.width / 6) 

                  & stars[i].x < animals[j].x + (goat.width / 6)

                  & stars[i].y > animals[j].y - (goat.height / 6)

                  & stars[i].y < animals[j].y + (goat.height /6)) {

                   score += 5;

                   stars[i].scored();  //move star off screen when it collides with goat 

              }

            }

          }

        }

        //draws correct ufo at mouse position

        if (ufo === ufo2) {

          image(ufo, mouseX, mouseY + 51, ufo.width/ 20, ufo.height / 20);

          abduct();  //if light is on then check for abductions

        } else {

          image(ufo, mouseX, mouseY, ufo.width/ 20, ufo.height / 20);

        }

      break;

      case 4:  //time is up and game is over 

        textSize(44);

        fill(255);

        text("score: " + score, 400, 200);  //displays final score

        textSize(36);

        if (mouseX > 310 & mouseX < 490

                   & mouseY > 350 & mouseY < 400) { //if mouse is hovering over play again button

          fill(hover);

          rect(400, 375, 180, 50, 20);

          fill(0);

          text("play again", 400, 385);

        } else {  //if mouse is anywhere else on screen

          fill(button);

          rect(400, 375, 180, 50, 20);

          fill(255);

          text("play again", 400, 385);

        }

      break;

    default:  //empty default

    } 

}

​

​

// handles key inputs of left and right arrow keys to change sky color

function keyPressed() {

  if (keyCode === LEFT_ARROW) {

    if (skyNum === 0){

      skyNum = 2;

    } else {

    skyNum--;

    }

  } else if (keyCode === RIGHT_ARROW) {

    if (skyNum === 2){

      skyNum = 0;

    } else {

    skyNum++;

    }

  }

}

​

// creates a MyStar custom PShape at mouse position when s is typed

function keyTyped() { 

    if (key === 's') {  

        let s = new MyStar(mouseX, mouseY);

        stars.push(s);

    }

}

​

//toggles ufo light and handles mouse presses

function mouseClicked() {

    switch(stage) {

      case 1:  //choosing game mode -> easy or hard

          if (mouseX > 337 & mouseX < 463

              & mouseY > 275 & mouseY < 325) {  //easy button is pressed

            easyMode = true;

            for (let i = 0; i < 4; i++) {

              animals[i].updateSpeed(easy);  //sets speed to easy speed for all animals

            }

            stage++;

          } else if(mouseX > 337 & mouseX < 463

                    & mouseY > 350 & mouseY < 400) {  //hard button is pressed

            hardMode = true;

            for (let i = 0; i < 4; i++) {

              animals[i].updateSpeed(hard);  //sets speed to hard speed for all animals

            }

            stage++;

          }

        break;

      case 2:

        if (mouseX > 325 & mouseX < 475

            & mouseY > 362 & mouseY < 438) {  //start button is pressed

          stage++;

        }

        break;

      case 3:

        //toggles ufo light with clicks

        if (ufo === ufo1) {

          ufo = ufo2;

        } else {

          ufo = ufo1;

        }

        break;

      case 4:

        if (mouseX > 310 & mouseX < 490

                   & mouseY > 350 & mouseY < 400) {  //play again button is pressed

          stage = 1;  //resets game to mode screen by resetting to stage 1

          score = 0;  //resets score

        }

        break;

    }

}

  //abduction function checks if ufo light touches an animal

  function abduct(){

    for (let j = 0; j < 4; j++) { 

      a = animals[j];

      if(mouseY > a.y - ((ufo2.height / 40) + 100)){  //checks if ufo light is at right y level on screen

      if (a.isCow){

        if (mouseX > a.x - (cow.width / 6) 

            & mouseX < a.x + (cow.width / 6)){  //checks if ufo light is touching cow

          score += 3;

          a.abducted();  //animal abducted function moves abducted animal off screen

        }

      } else {

        if (mouseX > a.x - (goat.width / 6) 

            & mouseX < a.x + (goat.width / 6)){  //checks if ufo light is touching goat

          score -= 3;

          a.abducted();  //animal abducted function moves abducted animal off screen

      }

      }

    }

  }

  }