OpenGL: beginGL() does not exist

Core Library Questions

didi

OpenGL: beginGL() does not exist

in Core Library Questions • 10 months ago

Dear All,

I've stumbled on this yesterday evening: "The function beginGL() does not exist.", while trying to switch a sketch from 1.5.1 to 2.0b6 (tried it now with 2.0b7, still doesn't work).

Minimal sketch reproducing this would be found here: http://wiki.processing.org/w/Advanced_OpenGL, and the fault lies somewhere in

PGraphicsOpenGL pgl = (PGraphicsOpenGL) g; // g may change GL gl = pgl.beginGL(); // always use the GL object returned by beginGL

I am just a happily hacking noob, tried to browse through the code and issue tracker, still no clues as to what/why/where.

I dearly hope this is not machine specific, but just in case, I am running win7 64, with an nvidia quadro inside.

Cheers,

Replies(6)

datadream..

Re: OpenGL: beginGL() does not exist

10 months ago

This was changed to beginPGL(), which you can then grab the gl object from.

didi

Re: Re: OpenGL: beginGL() does not exist

10 months ago

Hey! Thanks for your answer. I'm still stumbling along...

So this

PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;
GL gl = pgl.beginGL();

Becomes this:

PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;
PGL gl = pgl.beginPGL();

But then I get errors like "glColor4f(...) does not exist. Bummer :(

(just for reference, i am using the simple example from the wiki).

datadream..

Re: OpenGL: beginGL() does not exist

10 months ago

Not exactly. This:

PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;
GL gl = pgl.beginGL();

Becomes this:

GL gl = g.beginPGL().gl

Also, at the top of that wiki it says "This post is for Processing 1.x, it doesn't apply to Processing 2.x". A lot was changed for Processing 2.0, including coloring/vector definition. Check out this post by Andres on the changes regarding immediate vs. retained drawing modes.

jeff_g

Re: OpenGL: beginGL() does not exist

10 months ago

I'm trying to get that example working as well. I posted some code, but the stupid forum is marking it as spam. I have what I think should work, but alas it doesn't... at least not on OSX 10.8.2.

I posted it to the Wiki under a new 2.x section, so hopefully we can get it figured out and update it accordingly.
http://wiki.processing.org/w/Advanced_OpenGL

jeff_g

Re: OpenGL: beginGL() does not exist

10 months ago

GL gl = g.beginPGL().gl

Still gives the error that "glColor4f(...)" does not exist. I think you need GL2... correct? Does anyone have a working port of the Wiki post

Jesse Sco..

Re: Re: OpenGL: beginGL() does not exist

3 months ago

BUMP

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