Project 5: Wallpaper, Section B

/* Evan Stuhlfire
** estuhlfi@andrew.cmu.edu, section B
** Project 05: Wallpaper */

var dot = 5;
var bigDot = 10;

function setup() {
    createCanvas(600, 400);
    background(224, 223, 214);
    rectMode(CENTER);
}

function draw() {
    var rowHeight = 150;
    var colCount = 1; 
    var circleDiam = 50;
    var circleOffset = 10;
    var cosAmplitude = 40; // height of cos wave
    var sinAmplitude = 60; // height of sin wave
    var sinInc = 5; // increase for sin offset

    // Iterate over row to create rows of sin and cos waves
    for(var row = 0; row < height + rowHeight; row += rowHeight) {
        var colCounter = 0; // reset column counter for new row

        // iterate over theta to draw cos waves in background
        for(var theta = 0; theta < width; theta++) {
            stroke(49, 54, 56, 45);
            circle(theta, row + cosAmplitude * cos(radians(theta)), .2);
            circle(theta, row + cosAmplitude * -cos(radians(theta)), .2);
        }

        // iterate over theta to draw sin waves
        for(var theta = 0; theta < width + circleDiam; theta++) {
            stroke(49, 54, 56, 70);
            fill(49, 54, 56, 70);
            // draw sin waves as circles as theta moves across canvas
            // increment the sinAmplitude to create layered affect
            // decrease diam of circles to decrease line weight
            circle(theta, row + sinAmplitude * sin(radians(theta)), 2);
            circle(theta, row + (sinAmplitude + sinInc) * 
                sin(radians(theta)), 1);
            circle(theta, row + (sinAmplitude + 2 * sinInc) * 
                sin(radians(theta)), .2);
            circle(theta, row + sinAmplitude * -sin(radians(theta)), 2);
            circle(theta, row + (sinAmplitude + sinInc) * 
                -sin(radians(theta)), 1);
            circle(theta, row + (sinAmplitude + 2 * sinInc) * 
                -sin(radians(theta)), .2);

            // every 90 degrees draw a design
            if(theta % 90 == 0) {
                colCounter++;
                // when inside the sin waves draw circle of life
                if(colCounter % 2 == 0) {
                    stroke(49, 54, 56, 175);
                    fill(224, 223, 214);
                    drawLife(theta, row);
                } else {
                    // draw ellipses at intersection of sin waves
                    stroke(49, 54, 56, 50);
                    fill(224, 223, 214);
                    // draws concentric ellipses
                    for(var i = circleDiam; i >= 15; i -= 15){
                        ellipse(theta, row, i + circleOffset, i);
                    }
                    fill(49, 54, 56, 140);
                    ellipse(theta, row, bigDot); // draw dots at intersections

                    // draw little flowers
                    drawLittleFlowers(theta, row);
                } 
            }
        }
    }
    noLoop();
}

function drawLife(theta, row) {
    // draw the circle of life
    // set variable for circle dimensions and offset angles
    var bigDiam = 110;
    var diam = 30; // set smaller circle diameter
    var ellipseOffset = 20;
    var rad = diam/2;
    var angle1 = 30;
    var angle2 = 5 * angle1;
    var angle3 = 45;
    var oneEighty = 180;
    var angleOffset = 2;
    var diamOffset = 5;

    push(); // save settings
    translate(theta, row); // reposition origin
    stroke(49, 54, 56, 90); // lighten inner circles
    // draw larger ellipse
    ellipse(0, 0, bigDiam, bigDiam - ellipseOffset);

    // draw center circle
    circle(0, 0, diam);

    noFill();
    // draw layers of circles with drawMoreCircles with 
    // distance from center, diameter, and angle of offset
    // inner layer of circles
    drawMoreCircles(rad, diam, oneEighty/2);
    drawMoreCircles(rad, diam, angle1);
    drawMoreCircles(rad, diam, angle2);

    // second layer of circles
    drawMoreCircles(diam, diam, oneEighty/2);
    drawMoreCircles(diam, diam, angle1);
    drawMoreCircles(diam, diam, angle2);
    drawMoreCircles(diam - diamOffset, diam, oneEighty);
    drawMoreCircles(diam - diamOffset, diam, 0);
    drawMoreCircles(diam - diamOffset, diam, angleOffset * angle1); 
    drawMoreCircles(diam - diamOffset, diam, 2 * angleOffset * angle1);
    
    // third layer of circles
    // adjustments to offset diam and angle
    drawMoreCircles(diam + rad - diamOffset, diam, oneEighty - 
        (5 * angleOffset));
    drawMoreCircles(diam + rad - diamOffset, diam, -5 * angleOffset)

    pop(); // retore settings
    fill(120); // solid grey
    // draw center flower dot
    ellipse(theta, row, dot);
}

function drawMoreCircles(expand, diam, angle) {
    // draw two circles at opposite angles defines by the 
    // distance from the center, diameter, and offset angle
   circle(expand * cos(radians(angle)), expand * sin(radians(angle)), diam);
   if(angle != 180 & angle != 0){
       circle(expand * cos(radians(-angle)), expand * 
        sin(radians(-angle)), diam);
   }
}

function drawLittleFlowers(theta, row) {
    var rowOffset = 75;
    var petalLength = 15;
    var petalWidth = 4;
    var petals = 6;
    var angle = 30;
    var angleIncrease = 60;
    var diam = 30;
    var accentOffset1 = 7;
    var accentOffset2 = 10;
    var ellipseOffset = 10;

    // set color for flower petals
    stroke(49, 54, 56, 100);
    fill(224, 223, 214);

    // draw circle to contain flower
    ellipse(theta, row + rowOffset, diam + ellipseOffset, diam);
    circle(theta, row + rowOffset, diam);
    // draw the petals
    for(var i = 0; i < petals; i++){
        push(); // save settings
        translate(theta, row + rowOffset);
        rotate(radians(angle)); 
        ellipse(petalLength/2, 0, petalLength, petalWidth);

        // draw accent lines with offsets
        line(petalLength + accentOffset1, 0, petalLength + accentOffset2, 0);
        pop(); // restore settings

        angle += angleIncrease;
    }
    // draw the center dot
    fill(120); // solid grey
    ellipse(theta, row + rowOffset, dot);
}