How to use

handleDraw

method

in

processing.core.PApplet

@Override
public void requestDraw() {
 parent.handleDraw(Eye.Type.MONOCULAR);
}

public void callDraw() {
 sketch.handleDraw();
}

public void onDrawFrame(GL10 igl) {
 gl = igl;
 glThread = Thread.currentThread();
 sketch.handleDraw(Eye.Type.MONOCULAR);
}

 @Override
 public void callDraw() {
  sketch.handleDraw();
  render();
 }
};

@Override
public void onDrawFrame(HeadTransform headTransform, Eye leftEye, Eye rightEye) {
 glThread = Thread.currentThread();
 sketch.handleHeadTransform(headTransform);
 if (DEBUG_CARDBOARD) {
  Viewport vleft = leftEye.getViewport();
  Log.d(TAG, "onDrawFrame left viewport " + vleft.x + " " + vleft.y + " " + vleft.width + " " + vleft.height);
 }
 sketch.handleDraw(leftEye.getType());
 if (rightEye != null) {
  if (DEBUG_CARDBOARD) {
   Viewport vright = rightEye.getViewport();
   Log.d(TAG, "onDrawFrame right viewport " + vright.x + " " + vright.y + " " + vright.width + " " + vright.height);
  }
  sketch.handleDraw(rightEye.getType());
 }
}

@Override
public void onDrawEye(Eye eye) {
 GLES20.glEnable(GLES20.GL_DEPTH_TEST);
 GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
 checkGLError("onDrawEye");
 if (DEBUG_CARDBOARD) {
  Viewport viewport = eye.getViewport();
  String e = "MONOCULAR";
  if (eye.getType() == Eye.Type.RIGHT)
   e = "RIGHT";
  else if (eye.getType() == Eye.Type.LEFT)
   e = "LEFT";
  Log.d(TAG, "onDrawEye " + e + " viewport " + viewport.x + " " + viewport.y + " " + viewport.width + " " + viewport.height);
 }
 sketch.handleDraw(eye);
}

   public void handle(ActionEvent event) {
    long startNanoTime = System.nanoTime();
    try {
     sketch.handleDraw();
    } catch (Throwable e) {
     // Let exception handler thread crash with our exception
     drawExceptionQueue.offer(e);
     // Stop animating right now so nothing runs afterwards
     // and crash frame can be for example traced by println()
     animation.stop();
     return;
    }
    long drawNanos = System.nanoTime() - startNanoTime;

    if (sketch.exitCalled()) {
     // using Platform.runLater() didn't work
//          Platform.runLater(new Runnable() {
//            public void run() {
     // instead of System.exit(), safely shut down JavaFX this way
     Platform.exit();
//            }
//          });
    }
    if (sketch.frameCount > 5) {
     animation.setRate(-PApplet.min(1e9f / drawNanos, frameRate));
    }
   }
  });

pgl.getGL(drawable);
int pframeCount = sketch.frameCount;
sketch.handleDraw();
if (pframeCount == sketch.frameCount || sketch.finished) {