import ddf.minim.*;
import ddf.minim.analysis.*;

Minim minim;
AudioPlayer song;
BeatDetect beat;

float bottomSpeed = random(1.0);
float topSpeed = random(1.0);

int t = 0;

color[] COLORS = {
  color(255, 0, 0),
  color(255, 255, 0),
  color(0, 255, 0),
  color(0, 255, 255),
  color(0, 0, 255),
  color(255, 0, 255)
};

boolean leftShape = true;

int leftOpacity = 0;
int leftTopPos = 0;
int leftBottomPos = 0;
color leftCurrentColor = COLORS[(int) random(COLORS.length)];

int rightOpacity = 0;
int rightTopPos = 0;
int rightBottomPos = 0;
color rightCurrentColor = COLORS[(int) random(COLORS.length)];


void setup() {
  fullScreen();
  minim = new Minim(this);
  song = minim.loadFile("/Users/timco/Music/The Necks - Body/The Necks - Body - 01 Body.mp3", 2048);
  song.play();
  beat = new BeatDetect();

}

void draw() {

  beat.detect(song.mix);
  if(beat.isOnset()) {
    if(leftShape) {
      leftBottomPos = floor(width /2 + sin(bottomSpeed*t) * width / 2);
      leftTopPos = floor(width / 2 + sin(topSpeed*t) * width / 2);
      leftCurrentColor = COLORS[(int) random(COLORS.length)];
      leftOpacity = 255;
    } else {
      rightBottomPos = floor(width /2 + cos(bottomSpeed*t) * width / 2);
      rightTopPos = floor(width / 2 + cos(topSpeed*t) * width / 2);
      rightCurrentColor = COLORS[(int) random(COLORS.length)];
      rightOpacity = 255;
    }

    leftShape = !leftShape;

  }
  background(0);
  fill(leftCurrentColor, leftOpacity);
  beginShape();
  vertex(0, 0);
  vertex(leftTopPos, 0);
  vertex(leftBottomPos, height);
  vertex(0, height);
  endShape(CLOSE);
  fill(rightCurrentColor, rightOpacity);
  beginShape();
  vertex(rightTopPos, 0);
  vertex(width, 0);
  vertex(width, height);
  vertex(rightBottomPos, height);
  endShape(CLOSE);
  t++;
  leftOpacity *= 0.95;
  rightOpacity *= 0.95;
}