Constellation boundaries (0.12 and up)

[Alexander Wolf]

Original text: https://sourceforge.net/p/stellarium/discussion/278769/thread/dc960bbf/

The constellation boundaries used to be dotted red lines in 0.11 and earlier, and turning them on caused just a minimal performance hit. Since 0.12, they are solid red lines, and the associated performance hit is huge (for example, from 40 fps down to 13 once turned on).

Is there a way to alleviate this (or even better, restore the old pre-0.12 constellation boundaries)?

[Alexander Wolf (alexwolf)]

Diff: http://bazaar.launchpad.net/~stellarium/stellarium/trunk/revision/6948

Hint: viewing/flag_stippled_boundaries = true for enabling (false by default)

[Alexander Wolf (alexwolf)]

I should revert the fix because stippled lines (glStippledLine) not compatible with OpenGL ES 2 and ANGLE.

[gzotti (georg-zotti)]

Code could be bracketed with some #ifdef tests to be excluded from ANGLE/OpenGL ES2 builds. (?) I wonder about the performance issue. Maybe one of the things why we reverted to the old painter?

[Alexander Wolf (alexwolf)]

glStippledLine is deprecated since OpenGL 3.1 also and the inclusion of #ifdef not make much sense.