sketch
//Monica Huang
//Section E
//monicah1@andrew.cmu.edu
//Project-11
var myTurtle;
var startFrame;
function setup() {
createCanvas(400, 400);
background(100);
myTurtle = makeTurtle(width, height);
myTurtle.setColor(color(255, 100, 200));
myTurtle.setWeight(2);
myTurtle.penDown();
resetCanvas();
frameRate(50);
}
function draw() {
var step = (frameCount - startFrame)/20.0;
myTurtle.forward(step);
myTurtle.left(10.0);
if (myTurtle.y > height) resetCanvas();
}
function resetCanvas() {
background(100,0,10);
startFrame = frameCount;
myTurtle.penUp();
myTurtle.goto(width/6, height/2);
myTurtle.penDown();
}
function mousePressed(){
myTurtle.penUp();
myTurtle.goto(width/2, height/2);
myTurtle.penDown();
}
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;}
This piece I was playing with the tension of pattern and the randomness when interfere with the continuous flow of pattern.
//Monica Huang
//Section E
//monicah1@andrew.cmu.edu
//Project-11
var myTurtle;
var startFrame;
function setup() {
createCanvas(400, 400);
background(100);
myTurtle = makeTurtle(width, height);
myTurtle.setColor(color(255, 100, 200));
myTurtle.setWeight(2);
myTurtle.penDown();
resetCanvas();
frameRate(50);
}
function draw() {
var step = (frameCount - startFrame)/20.0;
myTurtle.forward(step);
myTurtle.left(10.0);
if (myTurtle.y > height) resetCanvas();
}
function resetCanvas() {
background(100,0,10);
startFrame = frameCount;
myTurtle.penUp();
myTurtle.goto(width/6, height/2);
myTurtle.penDown();
}
function mousePressed(){
myTurtle.penUp();
myTurtle.goto(width/2, height/2);
myTurtle.penDown();
}
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;}
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