ghou-Project-11-Composition

sketch

//Grace Wanying Hou
//15-104 Section D
//ghou@andrew.cmu.edu
//Project 11

var turtle =[];
var count = 10;
var dp;



function preload(){
    var imageurl = "https://i.imgur.com/S483jxr.jpg";
    dp = loadImage(imageurl);//loading the pic of my boy friendo
}

function setup() {
    background(0);
    createCanvas(380,300);
    image(dp,0,0)
    dp.loadPixels();
    for (var i = 0; i < count; i ++) {//setup the strokes
        turtle[i] = makeTurtle(0, 0);
        turtle[i].penDown;
    }
    strokeJoin(MITER);
    strokeCap(PROJECT);
    frameRate(30);
}

function draw() {
    for (var i = 0; i < count; i ++) {
        var pointcolour = dp.get(floor(mouseX),floor(mouseY));
        turtle[i].setColor(color(pointcolour)); //setting the colour to the pixel at the mouse point
        turtle[i].setWeight(random(15));//randomizing the weight
        turtle[i].turnToward(mouseX,mouseY, turtle[0].angleTo(pmouseX, pmouseY)); //turn along mouse movement.
        turtle[i].forward(turtle[i].distanceTo(mouseX, mouseY));//move along mouse movement.
    }
}




//given turtle stuffs
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) {
        strokeJoin(MITER);
        strokeCap(PROJECT);
        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;
}

This week I used turtle graphics to abstract colours from a portrait and “painting” with strokes randomized by mouse movements and those colours.