/*
ben yee final 12/9/07
 an interactive art piece that allows the user to select colors for the shades of bubbles
 */

import processing.video.*;
import krister.Ess.*;

AudioChannel myChannel;
FFT myFFT;

PImage buttons;
PFont f;

color red = color(255,0,0,150);
color green = color(0,255,0,150);
color blue = color(0,0,255,150);
color whichShade;

int xpos, ypos;  
int xspeed = 2; 
int yspeed = 2;  
int xdirection = 1;
int ydirection = 1;
float speed;

boolean musicOn;
Capture myCapture;

Spring2D s1, s2;

float gravity = 6.0;
float mass = 2.0;

void setup()
{
  size(1000, 240);
  background(200);
  frameRate(30);
  smooth();
  myCapture = new Capture(this, 120, 90, 30);                           //initiate the video, resolution and frame rate
  xpos = width;
  ypos = height/2;
  buttons = loadImage("buttons.png");
  musicOn = false;
  f = loadFont("LucidaSans-13.vlw");                                      //load font
  textFont(f);
  displayInstructions();

  Ess.start(this);                                                     // Start Ess
  myChannel = new AudioChannel("flows.mp3");                            // load music
  myFFT = new FFT(512);

  s1 = new Spring2D(0.0, width/2, mass, gravity);
  s2 = new Spring2D(0.0, width/2, mass, gravity);
}

void draw() 
{
  noStroke(); 
  int level=(int)(myFFT.getLevel(myChannel)*height);                      // get audio level

  s1.update(xpos, level);
  s1.display(xpos, level);
  s2.update(s1.x, s1.y);
  s2.display(s1.x, s1.y);

  fill(whichShade);
  ellipse(xpos,level,2,2);                                                 // dot in motion 

  fill(255);                                                              // the white outline box
  rect(0,0,120,240);   

  image(buttons,0,0);                                                     // the tools

  image(myCapture, 0, 30);                                                // the video window

  fill(200);                                                              // clear screen
  rect(0,120,120,20);

  fill(red);                                                              // the initial available colors  - R, G, B, Black, White
  rect(0,140,120,20);
  fill(green);
  rect(0,160,120,20);
  fill(blue);
  rect(0,180,120,20);
  fill(0);
  rect(0,200,120,20);

  fill(whichShade, 80);                                                     // give ellipse tool the color with translucent effect

  if(musicOn==true){                                                        // update the position of the shape
    xpos = xpos + ( xspeed * xdirection );
    ypos = ypos + ( yspeed * ydirection );
    myChannel.play(Ess.FOREVER);
  }
  if (xpos > width-speed || xpos < 120) {                                  // keep the line in motion in the workspace
    xdirection *= -1;
  }
  if (ypos > height-speed || ypos < 0) {
    ydirection *= -1;
  }

  if(mouseX > 120){                                                      // call the circle draw function if mouse in workspace
    variableEllipse(mouseX, mouseY, pmouseX, pmouseY);
  }
}

void captureEvent(Capture myCapture) {                                //read video
  myCapture.read();
}

void mouseReleased(){
  if(mouseX > 0 && mouseX < 30 && mouseY > 0 && mouseY <30){            //play and pause button triggers
    musicOn=true; 
  } 
  else if (mouseX > 30 && mouseX < 60 && mouseY > 0 && mouseY <30){
    musicOn=false; 
    myChannel.pause();
  }

  if(mouseX > 60 &&  mouseX < 90 && mouseY > 0 && mouseY <30){          //display instructions
    clearCanvas();
    displayInstructions();
  }
  if(mouseX > 90 &&  mouseX < 120 && mouseY > 0 && mouseY <30){      
    save("art.tif");
  }

  if(mouseY > 120 && mouseY < 140){                                   //clear the screen
    clearCanvas();
  } 

  if(mouseX < 120 && mouseY > 40){                                    //selection fill color
    int tempShade =  get(mouseX, mouseY);
    float r = red(tempShade);
    float g = green(tempShade);
    float b = blue(tempShade); 
    whichShade = color(r, g, b); 
  }
}

void variableEllipse(int x, int y, int px, int py) 
{
  speed = abs(x-px) + abs(y-py);                          // calculates speed of mouse
  stroke(speed);
  ellipse(x, y, speed, speed);                            // slow mouse draws small ellipse. quick mouse draws large ellipse.
}

void displayInstructions(){
  fill(0);        // fill black
  text("play/pause music and movement. display instructions. 'print' work" , 130, 20);
  text("see the user and use any color from this palette",130, 80);
  text("clear canvas", 130, 135);
  text("use red", 130, 155);
  text("use green", 130, 175);
  text("use blue", 130, 195);
  text("use black", 130, 215);
  text("use white", 130, 235);
  fill(whichShade);                                          // return to user selected fill
}

void clearCanvas(){
  fill(200);
  rect(120,0,width-120,height);
}

void stop()
{
  Ess.stop();                                               // When program stops, stop Ess too
  super.stop();
}