Hi.
Well, just to say that GPA, the acoustical simulation tool, is growing up, with several new features to play with.
http://gpa.hms2k.cl
best.
Been using it for a book I'm writing. Lots of fun and I enjoy using it. One feature that would be really nice is to let the user select the colors for the SPL plot you generate. I have to convert the images to grayscale for my purposes and then I have to go in and manually fill in the colors with different shades of gray. Would love an option to select the initial colors for each of the SPLs.
Also, a good upgrade to have would be the ability to draw lines representing reflecting surfaces. Not all venues are a rectangular box and being able to specify the shape of the room would be helpful.
For all us idiots in the USA than can't deal with metric, it would be nice to be able to specify units in feet and inches, too. Converting units starts to get old after a while.
When scaling the screen and moving objects on the screen, it would be nice if the axis distances remained constant (e.g., 10 meter intervals).
Good job!