Project 7: Curves

// Ana Furtado 
// Section E
// Project 7 Composition with Curves

var nPoints = 100;

function setup() {
    createCanvas(480, 480);
    background(255);
    frameRate(10);
}

function draw() {
    
    strokeWeight(3);

    //rotates and scales by mouse at top right
    //brown/red at left and bottom
    push();
    translate(width/4, height/4);
    scale(mouseX/width);
    rotate(radians(min(mouseX,mouseY)));
    drawAstroid();
    if (mouseX < width/2) {
        stroke('brown'); 
        rotate(radians(min(mouseX,mouseY)));
        drawAstroid();
    } 
    pop();

    //rotates and scales by mouse at bottom left
    //brown/red at left and bottom
    push();
    //translate(width/2, height/2)
    translate(width/4 * 3, height/4 * 3);
    scale(mouseX/width);
    rotate(radians(min(mouseX,mouseY)));
    drawAstroid();
    if (mouseX < width/2) {
        stroke('brown'); 
        rotate(radians(min(mouseX,mouseY)));
        drawAstroid();
    } if (mouseY > height/2) {
        stroke('brown'); 
        rotate(radians(min(mouseX,mouseY)));
        drawAstroid();
    }
    pop();

    //rotates and scales by mouse at random location 
    //move/leve mouse to left of canvas for red atroids 
    //move/leave mouse to right of canvas for black atroids 
    //move/leave in top right of canvas to fill with more black atroids
    push();
    translate(random(0,480), random(0,480));
    scale(0.5);
    rotate(radians(min(mouseX,mouseY)));
    drawAstroid();
    if ( mouseX < width/2) {
        stroke('brown'); 
        rotate(radians(min(mouseX,mouseY)));
        drawAstroid();
    }
    pop();

    

    //originals that stay in  splace
    //only show in beginning
    //scaled and rotated turns the astroid into an atroid evolute
    push();
    translate(width/2, height/2);
    drawAstroid();
    pop();

    //stays in place scale 0.5
    push();
    translate(width/2, height/2);
    scale(0.5);
    rotate(radians(45));
    drawAstroid();
    pop();

    //stays in place scale 0.25
    push();
    translate(width/2, height/2);
    scale(0.25);
    rotate(radians(45));
    drawAstroid();
    pop();

}

function drawAstroid() {
    //Astroid
    //https://mathworld.wolfram.com/AstroidEvolute.html

    var x;
    var y;
    var a = 300;

    //fill('pink');
    noFill();
    beginShape();
    for (var i = 0; i < nPoints; i++) {
        var t = map(i, 0, nPoints, 0, TWO_PI);
        //angleMode(DEGREES);
        x = a * (cos(t) * cos(t) * cos(t));
        y = a * (sin(t) * sin(t) * sin(t));
        vertex(x, y);
    }
    endShape(CLOSE);
    constrain(a, 0, 325);
}