This commit only adds callbacks which then later be used with major dependency
graph commit, keeping the upcoming commit more clean to follow.
Should be no functional changes so far still.
We can calculate tangents analytically for bezier curves, so just make
them awesome. New code uses forward differencing calculation for
efficiency just like curve calculation.
Picture before/after:
http://www.pasteall.org/pic/87843
Propper fix reverting most of rB60e70c0c6014e5, which was only partial specific fix.
This code uses generic `BKE_id_lib_local_paths()` func to handle all possible paths.
Reviewers: sergey, campbellbarton
Differential Revision: https://developer.blender.org/D977
Root of the issue goes to the fact that bevel list calculation might drop some points
if they're at the same position. This made spline length calculation goes wrong.
Now the length of the bevel segments is stored in the bevel list, so values are
always reliable.
Initial patch by Lukas Treyer with some tweaks from me.
Logic here was very stupid, texboxes would have their initial
locations scaled by font size but not their width/height.
Now its possible to change font size while keeping the textbox layout.
Other fixes
- tab character didn't work properly with textboxes.
- memory leak when VFontData was missing.
The issue has been introduced in 0985bb4, made it so curves and masks
stick to old behavior.
FCurves are still flaky, namely, grabbing both handles selected would
change the length of one of the handles which is not nice imo.
With the right handle selected, the movement of the left handle appears constrained
to the frame it is currently on, leading to unpredictable and wild overshoots of the
bezier curve. There appears to be little benefit in doing so.
The effect of this patch is that makes it so that instead of trying (initially) to
maintain the same distance between the two handles and then overshooting randomly
later, the handles now try to keep the same distance from each other (i.e. similar
doing a rotation around the keyframe) at all times. While this means that it isn't
possible to set up assymetric handles (i.e. where ease in to the key is less than the
ease out for example) using aligned handles (it's still possible using free; it's just
a lot more work to keep them aligned), the benefits of removing of the random blips and jumps
when things jump outweight the losses.
Patch by Brecht
