/**
 * ParticleString
 * 
 * Pixels in an image are represented as particles with the traer.physics system.
 * When you click the image the particles are attracted to form a shape made by a string
 * written in the screen.
 * 
 * Author: Jorge Cardoso
 * http://jorgecardoso.org
 *
 * 2 July 2005
 */

import traer.physics.*;

int imgWidth = 108;
int imgHeight = 50;
int particleWidth = 108;
int particleHeight = 50;

ParticleSystem physics;

Particle particle[][];
Particle fixed[][];
Particle letter[][];


int letterX[];
int letterY[];

PFont fonte;


PGraphics3 pg;

int count = 0;

float widthParticleRatio;
float heightParticleRatio;
float widthScreenRatio;
float heightScreenRatio;

PImage img;
void setup() 
{
    size(108*4, 50*4);

    widthScreenRatio = width/imgWidth;
    heightScreenRatio = height/imgHeight;

    widthParticleRatio = imgWidth/particleWidth;
    heightParticleRatio = imgHeight/particleHeight;

    println("widthScreenRatio: " + widthScreenRatio);
    println("heightScreenRatio: " + heightScreenRatio);

    println("widthParticleRatio: " + widthParticleRatio);
    println("heightParticleRatio: " + heightParticleRatio);

    fonte = loadFont("ArialMT-16.vlw");

    pg = new PGraphics3(particleWidth, particleHeight);

    img = loadImage("olhos.png");

    physics = new ParticleSystem(0, 0.1 );

    particle = new Particle[particleHeight][particleWidth];
    fixed =  new Particle[particleHeight][particleWidth];

    letterX = new int[particleHeight*particleWidth];
    letterY = new int[particleHeight*particleWidth];

    for(int i=0; i<particleHeight; i++) {
        for(int j=0; j<particleWidth; j++) {
            particle[i][j] = physics.makeParticle(1, (int)(j*widthParticleRatio), (int)(i*heightParticleRatio),0 );
            fixed[i][j] = physics.makeParticle(1, j*widthParticleRatio, i*heightParticleRatio, 0 );
            fixed[i][j].makeFixed();

            physics.makeAttraction( fixed[i][j], particle[i][j], 600, 50 );
        }
    }

    noStroke();
}

void draw() 
{
    if (count % 10 == 0) {
        physics.tick();
    }
    background(0);   

    for(int i=0; i<particleHeight; i++) {
        for(int j=0; j<particleWidth; j++) {
            int x = (int) particle[i][j].position().x();
            int y = (int)particle[i][j].position().y();

            int k = 0;
            int l = 0;
            //            for (int k = 0; k < heightParticleRatio; k++) {
            //                for (int l = 0; l < widthParticleRatio; l++) {
            fill(img.pixels[(int)((i*heightParticleRatio+k)*imgWidth+j*widthParticleRatio+l)]);
            rect((x+l)*widthScreenRatio, (y+k)*heightScreenRatio, widthScreenRatio, heightScreenRatio);               
            //                }
            //            }
        }

    }


    println(framerate); 

}

void entra(int id, String nome) {
    int index = 0;


    pg.defaults();
    pg.beginFrame();
    pg.fill(0);
    pg.rect(0, 0, imgWidth, imgHeight);
    pg.textFont(fonte);
    pg.fill(255, 255,255);
    String text = "1234567890 JORGE";
    pg.textAlign(CENTER);
    pg.text(nome, particleWidth/2 , particleHeight/2);
    pg.endFrame();

    for(int i=0; i<particleHeight; i++) {
        for(int j=0; j<particleWidth; j++) {
            int c = pg.pixels[i*particleWidth+j];
            if (brightness(c) > 1) {
                letterX[index] = j;
                letterY[index] = i;
                index++;             
            }                
        }
    }

    int ran;
    int ratio = particleWidth*particleHeight/index;
    int c = 0;
    for(int i=0; i<particleHeight; i++) {
        for(int j=0; j<particleWidth; j++) { 
            ran = (int)random(index);
            fixed[i][j].moveTo(letterX[ran]*widthParticleRatio, letterY[ran]*heightParticleRatio, 0);
        }
    }   


}


void sai(int id) {
    for(int i=0; i<particleHeight; i++) {
        for(int j=0; j<particleWidth; j++) { 

            fixed[i][j] .moveTo(j*widthParticleRatio, i*heightParticleRatio, 0);


        }
    }     
}  

void mousePressed() {
    if (mouseButton ==LEFT) {
        entra(1, "SEE THIS?");
    } 
    else {
        sai(1);
    }
}