jknip-Project-11-Composition

sketch

/*Jessica Nip
Section A
jknip@andrew.cmu.edu
Project-11
*/
var t6;
var start;
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;
}

//--------------turtle API above-------

//design simple pattern
function pattern(t6) {
    t6.forward(60);
    t6.left(90);
    t6.forward(40);
    t6.left(90);
    t6.forward(30);
    t6.left(90);
    t6.forward(40);
    t6.left(90);
    t6.forward(20);
    t6.right(90);
    t6.forward(20)
    t6.right(90);
    t6.forward(30);
    t6.right(90);
    t6.forward(40);
    t6.right(90);
    t6.forward(50);
    t6.right(90);
    t6.forward(50);
    t6.left(90);
}


function setup() {
    createCanvas(300,300);
    background(0);
    //define given parameters
    strokeJoin(MITER);
    strokeCap(PROJECT);
    //set row one position
    start = 30;
    t6 = makeTurtle(0,start);
    //determine initial color and weight
    t6.setColor(0);
    t6.setWeight(1); 
}

function draw() {
    //maximize width and height across canvas
    while(t6.y < height){
        while(t6.x < width) { 
            pattern(t6);
        }
        //redefine starting position for other rows
        t6.penUp();
        start = start + 100;
        t6.goto(0,start);
        t6.penDown();
    }
}

//when mouse is pressed, rndomize color and thickness
function mousePressed(){
    t6.x = mouseX;
    start = mouseY;
    t6.y = mouseY;
    t6.setColor(color(200, random(0,100),random(0,100)));
    t6.setWeight(random(1,3));
}

Here are some possible abstract gradient compositions that can be created with my sketch. I wanted to utilize a simple pattern created in black and white below, and transform that into warm hues represented by varying thicknesses of the repetition.