dvd_bounce/dvd_bounce_paths/dvd_bounce_paths.pde

import static javax.swing.JOptionPane.*;

float xmin = -57.0;
  
PrintWriter output, changes;

float xmax = 57.0;

float ymin = -145.75;
float ymax = 145.75;

float xscale = 1080.0 / (xmax * 2.0);
float yscale = 1920.0 / (ymax * 2.0);

float startx = 1;//566.0, 893.0
float starty = 1;

float x = 0.0;
float y = 0.0;

float lastx = 1.0;
float lasty = 1.0;

int frames = 500;
int angle = 45;
int startangle = 45;

float distance = 20.0;
int colorNumber = 0;

boolean changed = false;

PGraphics pg;

boolean ranOnce = false;

void setup () {
  size(540, 960);
  pg = createGraphics(1080, 1920);


  //frameRate(30);
}

void logPath () {
  output.print('{');
  output.print(map(x, 0.0, 1080.0, xmin, xmax));
  output.print(',');
  output.print(map(y, 0.0, 1920.0, ymin, ymax));
  output.print('}');
  output.println(',');
}

void logChange(){
  changes.print('{');
  changes.print(colorNumber); 
  changes.print('}');
  changes.println(',');
}

void draw () {
  if (!ranOnce) {
    x = startx;
    y = starty;
    angle = startangle;
    print(x);
    print(", ");
    print(y);
    print(" - ");
    println(frames);
  
    pg.beginDraw();
    pg.background(0);
    pg.fill(255);
    pg.stroke(255);
    //output = createWriter("log.txt"); 
    //changes = createWriter("changes.txt");
    
    for (int i = 0; i < frames; i++) {
      changed = false;
      
      if (i > 0) {
        pg.stroke(255, 0, 0);
        pg.line(lastx, lasty, x, y);
        pg.stroke(255, 255, 255);
      } else {
       pg.ellipse(x, y, 4, 4);
      }
      
      pg.point(x, y);
      
      lastx = x;
      lasty = y;
      
      //logPath();
      
      x = x + distance * cos((float) angle * PI / 180.0);
      y = y + distance * sin((float) angle * PI / 180.0);
      
      if (x >= 1080.0 || x <= 0.0) {
        angle = 180 - angle;
        changed = true;
      } 
      if (x >= 1080.0) x = 1080.0;
      if (x <= 0.0) x = 0.0;
      if (y >= 1920.0 || y <= 0.0) {
        angle = 360 - angle;
        changed = true;
      }
      if (y >= 1920.0) y = 1920.0;
      if (y <= 0.0) y = 0.0;
      
      //logChange();
      if (changed) {
        colorNumber++; 
      }
    }
    pg.ellipse(x, y, 4, 4);
    pg.endDraw();
    image(pg, 0, 0, width, height);
    
    /*output.flush(); // Writes the remaining data to the file
    output.close(); // Finishes the file
    changes.flush();
    changes.close();*/
    
    //ranOnce = true;
  }
  
  startx++;
  if (startx >= 1079.0) {
    startx = 0;
    starty++;
  }
  if (starty >= 1920.0) {
    starty = 0;
    frames++;
  }
  if (angle == startangle && abs(x - startx) < 5 && abs(y - starty ) < 5 ) {
    ranOnce = true;  
  }
}

void keyPressed () {
  if (keyCode == UP) {
    starty--;
    if (starty < 0) starty = 0;
    ranOnce = false;
  } else if (keyCode == DOWN) {
    starty++;
    if (starty > 1920.0) starty = 1920.0;
    ranOnce = false;
  } else if (keyCode == LEFT) {
    startx--;
    if (startx < 0) startx = 0;
    ranOnce = false;
  } else if (keyCode == RIGHT) {
    startx++;
    if (startx > 1080.0) startx = 1080.0;
    ranOnce = false;
  } else if (key == 'f') {
    String framesStr = showInputDialog("frames?");
    if (framesStr != null) {
      frames = parseInt(framesStr);
      ranOnce = false;
    }
  }
}

void mousePressed() { 
  startx = floor(map(mouseX, 0.0, width, 0.0, 1080.0));
  starty = floor(map(mouseY, 0.0, height, 0.0, 1920.0));
  ranOnce = false;
}