Project 11 Freestyle – Sofia Syjuco

sketch

//Sofia Syjuco
//section A
//smsyjuco@andrew.cmu.edu
// Assignment - 11- c

var turtle1;// create a turtle

function setup(){
    createCanvas(700,400);// create a canvas
    turtle1 = makeTurtle(width/2,height/2);// make the first turtle
}
function draw(){
  
    background(235,100,210,10); // fill the background with white
    turtle1.penDown();// start drawing
    turtle1.setColor(255); //set the color to white
    turtle1.setWeight(5);// weight to 6
    

    turtle1.turnToward(mouseX, mouseY, 30);// turn the turtle towards the mouse
    turtle1.forward(1);// move the turtle forward
}

//-----------------------------------------------------------------------------
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;}

I spent a long time tinkering with the turtle trying to figure out exactly how to turn it towards the mouse, and it was such a relief to discover it was actually pretty simple! From there it was just tweaking certain numbers and values, and trying to get an interesting result.