Project 11 – Turtle Freestyle – John Legelis

sketch

// John Legelis
// Section D


var t // turtle
var yF = 273// Winning Y value
var w // State of play (Play, Win, or Lose)
var s // osilator incriment

//load background image
function preload() {
    maze = loadImage("https://i.imgur.com/OPGsUjg.png")
}

function setup() {
    createCanvas(400, 300);
    background(0);
    image(maze,0,0)
    
    fill(0,255,0)
    noStroke()
    rectMode(CORNER)
    rect(361, yF, 33,10)

    // initialize t
    t = makeTurtle(20,0)
    t.setWeight(4)
    mouseX = 20
    mouseY = 1 
    s = 0
    w = 0
    yF = 263
}

function draw() {
    //Oscilate between colors at winning and loosing screens
    s = s + 1
    if (s % 3 == 1){
        var lcol = [255,255,255]
        var wcol = [0,255,0]
    }
    else {
        var lcol = [255,0,0]
        var wcol = [255,255,255]
    }

    // retrive brightness at turtle location
    var p = maze.get(t.x, t.y)
    var Tbright = brightness(p)
    // If in "play" mode, move turtle towards the mouse
    if (w == 0) {
        theta = t.angleTo(mouseX, mouseY)
        t.right(theta)
        t.forward(1)
    }


    //if hit wall, lost
    if (Tbright < 100){
        w = -1
    }
    // if below "win line", won
    if (t.y > yF) {
        w = 1
    }
   
    // if lost...
    if (w == -1){
        background(lcol)
        stroke(255)
        textSize(50)
        text("G A M E O V E R", 10, 150)
        textSize(25)
        text("mouse in box to restart", 40, 30)
        noStroke()
        fill(0)
        rectMode(CENTER)
        rect(25,25, 10,10)
    }
    //if won...
    if (w == 1){
        background(wcol)
        stroke(255)
        textSize(50)
        text("! Y O U W O N !", 10, 150)
        stroke(255)
        textSize(25)
        text("mouse in box to restart", 40, 30)
        noStroke()
        fill(0)
        rectMode(CENTER)
        rect(25,25, 10,10)
    }

    //If lost or won and mouse is in box initialize and go back to "play" mode
    if (((w==-1) || w==1) & (mouseX > 25 - 10) && (mouseX < 25 + 10) && 
    (mouseY > 25 - 10) && (mouseY < 25 + 10)) {
        w = 0
        setup()
    }

    if (mouseIsPressed){
        w = 1
    }
}


function turtleLeft(d) {
    this.angle -= d;
}


function turtleRight(d) {
    this.angle += d;
}


function turtleForward(p) {
    var rad = radians(this.angle);
    var newx = this.x + cos(rad) * p;
    var newy = this.y + sin(rad) * p;
    this.goto(newx, newy);
}


function turtleBack(p) {
    this.forward(-p);
}


function turtlePenDown() {
    this.penIsDown = true;
}


function turtlePenUp() {
    this.penIsDown = false;
}


function turtleGoTo(x, y) {
    if (this.penIsDown) {
      stroke(this.color);
      strokeWeight(this.weight);
      line(this.x, this.y, x, y);
    }
    this.x = x;
    this.y = y;
}


function turtleDistTo(x, y) {
    return sqrt(sq(this.x - x) + sq(this.y - y));
}


function turtleAngleTo(x, y) {
    var absAngle = degrees(atan2(y - this.y, x - this.x));
    var angle = ((absAngle - this.angle) + 360) % 360.0;
    return angle;
}


function turtleTurnToward(x, y, d) {
    var angle = this.angleTo(x, y);
    if (angle < 180) {
        this.angle += d;
    } else {
        this.angle -= d;
    }
}


function turtleSetColor(c) {
    this.color = c;
}


function turtleSetWeight(w) {
    this.weight = w;
}


function turtleFace(angle) {
    this.angle = angle;
}


function makeTurtle(tx, ty) {
    var turtle = {x: tx, y: ty,
                  angle: 0.0, 
                  penIsDown: true,
                  color: color(128),
                  weight: 1,
                  left: turtleLeft, right: turtleRight,
                  forward: turtleForward, back: turtleBack,
                  penDown: turtlePenDown, penUp: turtlePenUp,
                  goto: turtleGoTo, angleto: turtleAngleTo,
                  turnToward: turtleTurnToward,
                  distanceTo: turtleDistTo, angleTo: turtleAngleTo,
                  setColor: turtleSetColor, setWeight: turtleSetWeight,
                  face: turtleFace};
    return turtle;
}

When approaching this project I had an idea instantly to use the turtle to make some sort of maze game. Given our recent experience in using brightness and get image I was able to analyze a maze image and detect the walls very efficiently. I polished the game with a win and lose screen and a quick restart function based on mouse position.