// produce a timelapse desync of image and map
// Appearing like apparitions

import processing.pdf.*;
import processing.opengl.*;
 
int res=48;
Point3D[][] points;
int wres, hres;

void setup() {

  size(400, 300, OPENGL);
    
  wres = width/res;
  hres = height/res;

  points = new Point3D[res][res];

  for (int wx=0; wx<res; wx++)
  {
    for (int hy=0; hy<res; hy++)
    {
      points[wx][hy] = new Point3D((-width/2)+wx*wres, (-height/2)+hy*hres, 0, wx*width/res, hy*height/res);
    }
  }

}

 void draw() {

  translate(width/2, height/2,-250);
  rotateY(mouseX*0.08);

if (rec)
 beginRaw (PDF, "frame.pdf");
  
  background(255); 
  drawMesh();  // use buffer to display the blurred brightness map.

if (rec) 
 endRaw();
 
rec = false;
}

boolean rec = false;

void mousePressed() {
  
  rec = true;
}


// Draw mesh with texture
void drawMesh() {
  
  if(!grid) 
    noStroke();

  
  for(int i=0; i<res-2; i++)
  {

    beginShape(TRIANGLE_STRIP);

    for(int j=0; j<res-1; j++)
    {
       fill ((int)random(0,255));
       stroke ((int)random(0,255));
       vertex(points[i][j].x, points[i][j].y, points[i][j].z);
       vertex(points[i+1][j].x, points[i+1][j].y, points[i+1][j].z);
    }
    endShape();
  }
}

public class Point3D {

  float x, y, z, u, v;

  Point3D (float x, float y, float z, float u, float v) {
    this.x = x; this.y = y; this.z = z; this.u = u; this.v =v;
  }

} // class


boolean grid = false;