Proscene mouse postion projection from screen to scene's plane


Usually, for zooming and panning I’m using gicentreUtils library which is great but still has an issue - small additional zooming is added at the end of the corresponding mouse gesture (SHIFT+mouseDrag). Therefore, in the new project which requires CAD-related features, I decided to use Proscene library.

Zooming&panning works great, but now I can’t figure out how to obtain information about the coordinates of the mouse pointer relative to the scene’s plane.

I would greatly appreciate if anyone could suggest an easy way of converting mouseX and mouseY values of the mouse pointer on the screen into X and Y values on the given frame (scene’s grid plane in particular).

The following is a non-working attempt to obtain the desired values:

import remixlab.proscene.*;
import remixlab.dandelion.geom.Vec;

Scene scene;
InteractiveFrame frame;

void setup() {
  size(800, 600, P3D);
  scene = new Scene(this);
  frame = new InteractiveFrame(scene);

void draw() {

void mousePressed() {
  // prints mouse pointer coordinates relative to SCREEN frame
  PVector screenPoint = new PVector( mouseX, mouseY );
  println( "screen:" + screenPoint );
  // prints mouse pointer coordinates relative to SCENE frame
  Vec worldPoint = scene.projectedCoordinatesOf( Scene.toVec( screenPoint ) );  
  println( "world:" + worldPoint.toString() );