Comments on Dr. Bert Freudenberg: OpenGL in a Workspace

Thank you! The Sensor hack is what I was looking ...

2007-03-10T18:41:00.000+01:00

Thank you! The Sensor hack is what I was looking for. I actually have the COpenGlPlayer code already, although when I tried to backtrack to find where I had gotten it, I looked everywhere except the Tweak list. Thanks again. daf

There is no official way to convert Tweak coordina...

2007-03-10T15:28:00.000+01:00

There is no official way to convert Tweak coordinates to absolute Squeak Display coordinates. Here is a hack involving Sensor.

Besides, you might find this useful: COpenGLPlayer

I'm looking for a way to do this cleanly within a ...

2007-03-10T14:59:00.000+01:00

I'm looking for a way to do this cleanly within a Tweak project, but I can't seem to find the right offset(s) to put the OGL area in the project window. Any ideas?

This is called "positional arguments", Andreas all...

2007-02-18T12:14:00.000+01:00

This is called "positional arguments", Andreas allowed this syntax in Croquet. The actual selector in this case is #'glClearColor()/4'.

The reason is that this is the syntax that is used in any piece of OpenGL documentation. You can alternatively write

ogl glClearColor: 0 with: green with: 0 with: 1

which I find even less readable. These are FFI methods, so they directly call out to the corresponding C function. Personally I like this, it reminds me that this is a C call rather than a Smalltalk method.

A "cool" hack is to use cascades, which allows you to copy C code almost verbatim:

ogl
glClearColor(0, green, 0, 1);
glClear(16r4000);
yourself.

...ogl glClearColor(0, green, 0, 1).ogl glClear(16...

2007-02-18T03:35:00.000+01:00

...
ogl glClearColor(0, green, 0, 1).
ogl glClear(16r4000).
...

I'm sure I don't get that. Most of the syntax here in the snippet looks like Smalltalk syntax. But then there's this mixed in? It's amazing, because immediately I have no idea what the glClearColor arguments mean. Or the glClear. Is this one of these "on beyond Smalltalk" things I keep hearing some of the spring-from-Squeak projects talking about?