Found while working on snapping issues, confirmed using bisect tool: previous to this commit, inner/outer parts were swapped when switching from otho to persp!
Issue is caused by start point of ray used to detect faces under the mouse is set rather far away in ortho 3dviews.
The loss of precision on the ray location induced by this can lead to face snapping failures.
Solution is to do the raycasting with a temp start point, much closer to the object we check, and add back
to the found distance the diff to the real start point once detection is done (as we need all hit distances
from all tested objects to be relative to a common point!).
Note this commit only addresses the "face snapping on mesh" case, other kind of snapping do not seem to suffer
from this issue.
Reviewers: brecht, campbellbarton
Differential Revision: https://developer.blender.org/D268
- quads, tris now use direct pointer access rather then iterators.
- for ngons also avoid iterator, just loop over the loops.
also minor change, use floorf rather then floor for ED_view3d_project_short_ex, ED_view3d_project_int_ex
caused by not projecting points behind the perspective view,
even though this worked in 2.64 the values were flipped (rotating direction was reversed and the center point was flipped).
added V3D_PROJ_TEST_CLIP_NEAR, when omitted ED_view3d_project_*** will project points from behind a perspective view plane.
a few areas that use ED_view3d_win_to_segment_clip() didnt take into account the case where the segment was filly clipped, some callers even needed the segment not to be clipped.
- added ED_view3d_win_to_segment()
- ED_view3d_win_to_segment_clip() now returns FALSE if the segment is totally clipped, but the start/ends of the line are not zero'd as they were before.
- move object_iterators.c --> view3d_iterators. (ED_object.h had to include ED_view3d.h which isn't so nice)
- move projection functions from view3d_view.c --> view3d_project.c (view3d_view was becoming a mishmash of utility functions and operators).
- some some cmake includes as system-includes.
