Blender Git Loki

code cleanup: reduce float/double promotion

Change libmv's bilinear sampling to assume the same pixel
conventions as Blender. This fixes the preview widget, and
should make tracking slightly more accurate.

Add new warp regularization scheme for planar tracking.

This adds a new term to the tracking cost function that
restricts how much the optimizer can warp the patch (as
opposed to merely adjusting the translation). This should
reduce the "jumpiness" that is sometimes seen when doing
non-"Loc" tracks.

It is disabled in this commit; a subsequent commit will add
controls to the tracking dialog for this.

style cleanup: assignment & indentation.

Formatting fixes in Ceres.

Looks like some kind of merge error happened here which i didn't notice. Corrected!

code cleanup: removed/renamed shadow & duplicate variable definitions.

Actually that was an error in on of test formulas. Stick back to original one.

code cleanup: quiet all warnings about double promotion (either by changing the type or explicitly casting).

style cleanup: block comments

Changes to keying nodes:

- Replace FastGaussian blur with GaussianBokeh blur which should give better results.
- Changes a bit formula of saturation which in some cases gives better result.
Also included (commented out) original formula which was also checked by Brecht
and which gave better result in some other cases.
- Made clipping white/black temporal dependent, so hopefully it wouldn't destroy
gradients on edges.

fix for un-handled exception when entering in multiple values to a button, floats were not correctly checked for.

Fixed crash in previous commit when track preview is drawing for missed frame

Homography correction for track preview widget

Use homography transformation for pattern displayed in track preview widget.
Sampling of this pattern happens to resolution of preview widget itself,
which implied some bigger changes in how scopes are working:

- Instead of real pattern store search area in BKE_movieclip_update_scopes,
which is later used for sampling pattern.
- Sampling of pattern happens in ui_draw_but_TRACKPREVIEW from search area
which allows to sample it to actual resolution of preview widget.
- If size of preview widget is not changing, this sampled pattern wouldn't
be re-sampled until scopes are tagged to update.

There are some issues with pattern sampling which seems to happen SamplePlanarPatch,
changing linear sampling to nearest removes that unwanted 1px offset.

Left commented saving of sampled image in ui_draw_but_TRACKPREVIEW which should
help figuring the issue out.

Planar tracker polish.

- Fixes the correlation checking code that was broken in the
previous commit. The bug was a transpose error.
- Fixes a memory leak of the warp functor, found by Sameer.
- Various cleanups done at Sameer's suggestion.

Thanks to Sameer Agarwal for a code review.

code cleanup: doxy comment filename corrections

add a utility function to get an exact match for a grease pencil frame.

rna_SequenceElements_pop --> use memcpy instead of strcpy

code cleanup: name mask and grease pencil dope sheet editor functions more consistantly

constraints names are not matching (rna and constraint.c). doing rna->constraint.c