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the way freeglut is linked

VS2017

use glewExperimental for core profiles.

See merge request !101

Otherwise extensions might not be loaded properly which causes segfaults

Find QWT matching QT 5.10.1

See merge request !100

Fixed two ugly typos in the logging widget.

See merge request !98

Proper context creation

See merge request !97

Try the following contexts: settings, 4.4 compat, 3.2 core and give comprehensible error messages if anything fails.

Check glcontext on startup

See merge request !94

Fixed ugly typo regarding qt-not-found in OpenFLipper-CMakeLists.txt. Better…

See merge request !95

Fixed ugly typo regarding qt-not-found in OpenFLipper-CMakeLists.txt. Better explanation for what went wrong.

Check whether the OpenGL context matches the one that was requested via settings. If not, print a warning.

Two sided lighting shader gen

See merge request !93

hotfix patch for pickingRenderer

Closes OpenFlipper-Free#150

See merge request !91

added vertex and fragment shaders for picking which render vertex

See merge request !92

Feature picking shader compatibility

Closes #18

See merge request !88

colors from input attributes to screen. if the shaderCache would have a
good interface, this would not have been necessary

also removed some obsolete checks for compatibility profiles, which
prevented the proper use of the optimized picking variant when compat
profiles with version 3.2 or newer were present

log noise

spamming when version check fails

glVertexAttribDivisor is a nullpointer. Use ARB extension call instead

https://www.graphics.rwth-aachen.de:9000/OpenFlipper-Free/OpenFlipper-Free/issues/150
by initializing the colorStack also when the pickCache is used, as the
picking renderer reinitializes the colorstack.