Render GLCanvas with PGraphics

Hello,

I am trying to integrate a component which is extending a GLCanvas in my existing application. My problem is, that I am already using a Java framework in which I can not add a GLCanvas by using the "add(comp)" method. I can not use this "add(comp)" method because all UI Elements of the other framework which I am using are then behind the added GLCanvas.

In order to render visible objects in this framework, there is a method which is called on every frame and this method gets a "PGraphics" object as an argument.

Would it be possible to integrate the GLCanvas-component in the existing application by directly rendering the GLCanvas with the help of this PGraphics (or PGraphicsOpenGL) object?

ac should be able to help you.

Hello, you should be able to add you own GLCanvas to an application using Processing. In fact the new version of PGraphicsOpenGL (only in the repo at this point, but a new alpha should be out soon), does precisely that when you create an offscreen surface with createGraphics(w, h, P3D).

Hi,

and is there a way to render the custom GLCanvas with the given PGraphics object of the PApplet? I can't add the custom GLCanvas with the "add(comp)" method, because I want to be able to lay other ui components over this new custom GLCanvas. The framework that I am already using for my application is build with processing and it draws all ui elements with this PGraphics object. The problem is, that these ui elements are behind the custom GLCanvas, when I am adding this with "add(canvas)".

Well, the rendering model of PGraphics is designed to work with a single GLCanvas attached to the parent PApplet. I imagine that you could add more GLCanvas objects to the PApplet, but then you would need to use a layout that accommodates all of them at once, but this will probably break other things in PApplet. You can always create as many offscreen surfaces as you want using FBOs and compositing them onto the main GLCanvas as regular images.