hannahk2-Project-07

sketch

//Hannah Kim
//Section A
//hannahk2@andrew.cmu.edu
//Project-07

var nPoints = 100;
var EPITROCHOID = 0; // Cartesian Parametric Form  [x=f(t), y=g(t)]
var CRANIOID = 1; // Polar explicit form   [r =f(t)]
var curveMode = EPITROCHOID;

var numObjects = 10;
var centerX;
var centerY;
var angle = 0;
var distance = 100;

function setup() {
// creates canvas
createCanvas(500, 500);
centerX = width/2;
centerY = height/2;
noStroke();
ellipseMode(CENTER);
}

function draw() {
background(0, 0, 0, 20);
// draw the frame
fill(0); 
stroke(255, 0, 0, 40);
noFill(); 
rect(0, 0, width-1, height-1); 

// draw the curve and rotate at different angles
push();
translate(width / 2, height / 2);
drawecurve();
rotate(PI/3.0);
drawecurve();
rotate(2*PI /3.0);
drawecurve();
pop();

//function to draw the curve
function drawecurve() {
    var x;
    var y;
  
    var a = 70.0;
    var b = a / 2.0;
    var h = constrain(mouseY / 20.0, 0, b);
    var ph = mouseX / 80.0;
    
    beginShape();
    for (var i = 0; i < nPoints; i++) {
        var t = map(i, 0, nPoints, 0, TWO_PI);
        
        x = (a + b) * cos(t) - h * cos(ph + t * (a + b) / b);
        y = (a + b) * sin(t) - h * sin(ph + t * (a + b) / b);
        vertex(x, y);
    }
    endShape(CLOSE);
}

var angleObject = 360/numObjects;
	//creates for loop which creates ellipses
	for (var i=0;i<numObjects ;i++) {
	angle = frameCount;
	//makes the distance between the ellipses change according to mouseX
	distance = sin(radians(mouseX))*150;
	var posX = centerX + distance *cos( radians(angleObject*i + angle) );
	var posY = centerY + distance *sin( radians(angleObject*i + angle) );
		//creates different curves and lines
		//makes one curve grow in width depending on mouseY
		//changes size of curves based on var posX and posY
		fill(255, 0, 0, 0);
		ellipse(posX, posY, 10, 10);
		stroke(255, 0, 0, 40);
		strokeWeight(1);
		line(centerX, centerY, posX, posY);
		line(centerX, centerY, posX-100, posY-100);
		line(centerX, centerY, posX+100, posY+100);
	 	//ellipse(posX, posY, mouseY, 100);
		ellipse(posX, posY, 200, 200);
	}
}

I really enjoyed making this project and playing with the different parameters of the curves. I tried to make something resembling a rotating planet/orb.