[Pythoncad-developer] Cairo or OpenGL?

[<ger...@gm...>]

Hi All,

Starting a new thread about the renderer to choose.
For the user interface we have chosen pygtk but the renderer is still  
unclear to me.

A remainder from our emails:

OpenGL:
Pros:
* very fast
* in case we want to go on 3d no change of the way we show the entity

Cons:
* we need to learn how it works (personally i never use it)
* installation problem we need more pakage to make it works
* as gertwin say on mac we get some trouble.


Cairo + homebrew display list:
Pros:
* no need to change the way that we draw the entity
* it's no so slow if we build some smart algorithm

Cons:
* No real time zooming and panning possible, only on small parts of the  
drawing.


Personally I would like to use OpenGL, realtime zooming and panning is a  
must have feature I think.
Op OSX the cairo 3 second redraw time for 100000 elements is too much for  
such a feature.
On linux we can use the gtkglext but on OSX I have to take a different  
approach.

What are the opinions?
If OpenGL is a no go I will let it rest, otherwise I am going to test  
gtk+opengl on OSX.

Regards,
Gertwin