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From: | John Swensen |
Subject: | Basic questions about the new graphics system |
Date: | Thu, 23 Oct 2008 18:57:41 -0400 |
In particular, I have the following questions (but I'm sure once these are answered there will be 10 more):
1) I see that FTGL gets compiled in, but I don't see any text, titles, legends, etc. when I try to plot such things. Is there something wrong with my latest build from HG? 2) Along the line of (1), is there a list of which properties are actually implemented? I see that essentially all the properties exist, but which ones actually have an effect on the plot rendering? I guess this applies to both the GNUPLOT and OpenGL backends. 3) For the new graphics subsystem, what is the appropriate way for UI callbacks to modify properties? In my implementation of a GTK OpenGL plot window, when I change the window position or size, or click on a certain point in the window, etc. I need to know how to get that information back into the handle tree in the appropriate manner. It is a simple as modifying the property directly, or is there an interface built in for doing this? Do these take effect immediately, or do they wait until the next iteration of the readline idle loop? 4) Are the event functions implemented yet? What is the proper way to trigger them? 5) For the life of me, I can't get rotation to work with the opengl backend. How should this be done in the proper manner?
I think a 1/2 page to 1 page description of how the different parts of the new graphics subsystem (separating out the handle properties from the OpenGL/Gnuplot backends) would be a great help to me and I think to others who are looking at contributing to the new graphics subsystem.
Thanks. John Swensen
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