![[OLD FALL 2018] 15-104 • Introduction to Computing for Creative Practice](../../../../wp-content/uploads/2020/08/stop-banner.png)
/*Curran Zhang
curranz
Project 11
Section A
*/
var ttl = [];
function setup(){
createCanvas(480,480);
background(10);
frameRate(20);
}
function draw(){
var x = random(5,15);
var xx = random(10,20);
background(0,10);
for (var i = 0; i <ttl.length; i++) {
ttl[i].setColor(random(150,200));
ttl[i].setWeight(10);
ttl[i].penDown();
ttl[i].right (x);
ttl[i].forward(xx);
}
}
function mouseDragged(){
ttl.push(makeTurtle(mouseX,mouseY));
}
///////////////////
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;
}For this project, I wanted to use the simplicity of turtle graphics to create an animation that is chaotic. Beginning with a circle, I began to create and animate its motion along the mouse.
