import jsyphon.*; // Syphon
import javax.media.opengl.*;
import processing.opengl.*;

PGraphicsOpenGL pgl;// Syphon
GL gl;// Syphon
int[] texID;// Syphon

ParticleSystem ps;

JSyphonServer mySyphon;

void setup() {
  size(640, 360, OPENGL);
  colorMode(RGB, 255, 255, 255, 100);
  ps = new ParticleSystem(1, new PVector(width/2,height/2,0));
   smooth();    
  frameRate(25); // frameRate (experiment witht his for best lag free results
  
    // initialisation serveur syphon
   pgl = (PGraphicsOpenGL) g;
  gl = pgl.gl;
  initSyphon(gl,"processing");
}

   
void draw() {
  background(0);
  ps.run();
  ps.addParticle((mouseX),(mouseY));
 renderTexture(pgl.gl);
}


void initSyphon(GL gl, String theName) {
    if(mySyphon!=null) {
      mySyphon.stop();
    }
    mySyphon = new JSyphonServer();
    mySyphon.test();
    mySyphon.initWithName(theName);

    // copy to texture, to send to Syphon.
    texID = new int[1];
    gl.glGenTextures(1, texID, 0);
    gl.glBindTexture(gl.GL_TEXTURE_RECTANGLE_EXT, texID[0]);
    gl.glTexImage2D(gl.GL_TEXTURE_RECTANGLE_EXT, 0, gl.GL_RGBA8, width, height, 0, gl.GL_RGBA, gl.GL_UNSIGNED_BYTE, null);
} 

void renderTexture(GL gl) {
  gl.glBindTexture(gl.GL_TEXTURE_RECTANGLE_EXT, texID[0]);
  gl.glCopyTexSubImage2D(gl.GL_TEXTURE_RECTANGLE_EXT, 0, 0, 0, 0, 0, width, height);
  mySyphon.publishFrameTexture(texID[0], gl.GL_TEXTURE_RECTANGLE_EXT, 0, 0, width, height, width, height, false);
}