fe05d635e6
When curves are painted via openGL there are a number of limitations regarding aesthetics, setColor() doesn't work once the series is created, opacity is ignored etc. So when we create a selection from an openGL enabled curve we cannot set it gray etc. Instead, this commit will set the selection curve to gray and use opengl rendering on the selection (on the assumption that the user specified opengl rendering for performance and so we should reflect that in the selection curve). This has a dramatic improvement in performance on a scatter plot of activity data where there are 1000s and 10000s of points in some cases. We should recommend that opengl is enabled for curves that have large number of points, and indeed, the default is to enable it unless the user specifically overrides (e.g. for better aesthetics).
GoldenCheetah
About
GoldenCheetah is an open-source data analysis tool primarily written in C++ with Qt for cyclists and triathletes with support for training as well.
GoldenCheetah can connect with indoor trainers and cycling equipment such as cycling computers and power meters to import data.
In addition, GoldenCheetah can connect to cloud services.
It can then manipulate and view the data, as well as analyze it.
Installing
Golden Cheetah install and build instructions are documented for each platform;
INSTALL-WIN32 For building on Microsoft Windows
INSTALL-LINUX For building on Linux
INSTALL-MAC For building on Apple OS X
OSX: 
Windows:
Alternatively, official builds are available from http://www.goldencheetah.org
whilst the latest developer builds are available from https://github.com/GoldenCheetah/GoldenCheetah/releases