/*
Marzhan Kengessova
Physical Computing
Tutorial #3
Part B
February 9, 2016

Animation is made of multiple lines forms circled animation with different
bright colors. If you press mouse, background will change, if you press
mouse again, background will change. I took animation code from previous my project
from another course, so, right know I don't remember from where I took my baseic code,
but it was modified.
*/

float num, pathR, pathG, pathB;
int backgroundColor = 0;
boolean doOnce = true;

void setup() {
  size(640, 640); //size of the canvas
}

void draw() {
  background(backgroundColor);
  translate(width/2, height/2); //mapping where to translate
  for (int i = 0; i < 360; i+=30) {
    float x = sin(radians(i+frameCount)) * 70; //radius of that circle x axis
    float y = cos(radians(i+frameCount)) * 90; //radius of that in y axis
    pushMatrix();
    translate(x, y);
    rotate(radians(-i)); //movement and rotation
    branch(75, i);
    popMatrix();
  }
  num+=0.05; //fastness of the animation
}

void branch(int l, int i) {
  float theta = sin(num)*110;

  ellipse(0, 0, 0, l); //line
  translate(0, l); //its mapping

  l *= 0.66;

  pathR = (((float)165/width)*mouseX+theta)+325*sin(i+num*2);
  pathG = (20+theta)+85*sin(i+num*6);
  pathB = (((float)35/height)*mouseY+theta)+8425*sin(i+num*7); //colors

  if (l > 3) { //fastness
    stroke(pathR, pathG, pathB); //stroke color
    pushMatrix();
    rotate(radians(theta)); //what to rotate
    branch(l, i);
    popMatrix();

    stroke(pathR, pathG, pathB); //stroke colors
    pushMatrix();
    rotate(-radians(theta)); //rotate in opposite way
    branch(l, i);
    popMatrix();
  } else {
    noStroke();
    fill(pathR, pathG, pathB); //else color and
    line(0, 0, 5, 5);
  }
}

void mousePressed() { //if mouse pressed, background will change
  if (doOnce && backgroundColor == 255) {
    backgroundColor = 0;
    doOnce = false;
  }
  if (doOnce && backgroundColor == 0) { //if mouse is pressed again, background change
    backgroundColor = 255;
    doOnce = false;
  }
}

void mouseReleased() {
  doOnce = true; //mouse released
}