Vector.angle_signed(other)
for 2D vectors to get the clockwise angle between them.
in BLI math its called - angle_signed_v2v2()
shorthand for...
atan2f((v1[1] * v2[0]) - (v1[0] * v2[1]), dot_v2v2(v1, v2))
also corrects compile error in last commit.
- moved mesh conversion functions into their own file.
bmesh py api:
- can now create a new empty bmesh without first creating mesh data.
- added function to copy bmesh data back to a mesh.
- bmesh.from_mesh() can now get a mesh which isnt in editmode.
* C: BM_vert_separate(...)
* py: bmesh.utils.vert_separate(vert, edges)
This splits off regions around the vertex, splitting on connected edges passed in a sequence.
also made minor changes
- rename python api functions _rip to _separate
- fixed bmesh iterator being iterable its self (some parts of python expect this)
- fix memory leak in bmesh python api.
Now create the rotate edge in advance and copy its customdata (before joining the faces).
This commit also fixes an annoyance where tryangulating faces could create duplicate edges.
On a user level, edge rotate now works better with multiple edges selected, it wont make zero area faces or rotate edges into existing ones.
With a single edge selected - rotate is less strict and will allow ugly resulting faces but still checks on duplicate edges.
API:
* BM_edge_rotate now takes a flag, to optionally...
** check for existing edge
** splice edge (rotate and merge)
** check for degenerate resulting faces (overlapping geometry, zero area)
** beauty - only rotate to a better fit.
... this allows it to still be used as a low level API function since all checks can be skipped.
* BM_edge_rotate() now works a bit different, it find the new edge rotation before joining the faces - exposed by BM_edge_rotate_calc().
* Added api call bmesh_radial_faceloop_find_vert() - Radial Find a Vertex Loop in Face
* add BLI_rfindlink for reverse index lookup (used so bm.select_history[-1] doesn't have to loop the entire list twice).
* add bm.select_history.active so you can get the last selected item or None without having to check seq length.
if blender freed the BMesh before python was finished (on exit editmode for eg), python would attempt to access the bmesh to clear python pointers in it.
On a place, Ctrl+T, Fkey would create a quad overlapping the 2 Tris.
Now this case is checked for in a general way - if the bounds of the face are already filled in with faces (that _only_ use these edges-verts), then dont create the face.
This is an option for the 'edgenet_fill' operator, since creating the face isnt incorrect, just not-what-you-want mostly.
added functions
* BM_edge_share_vert - returns shared vert between 2 edges.
* BM_face_exists_multi, BM_face_exists_multi_edge - check if existing faces fill the edge bounds.
* also add BM_ELEM_INTERNAL_TAG so low level functions can tag without conflicting with higher level functions that also rely on tagging elements.
* better type safety for BM_elem_flag_* and BM_elem_index_* functions.
* add BMElem type to be used where BMFace/Edge/Vert/Loop can be interchanged.
* fix bug in select manifold, found when making functions more strict.
* BMFace.copy_from_face_interp(face)
* BMLoop.copy_from_face_interp(face, vert=True, multires=True)
These are important for rebuilding geometry from existing faces without loosing UV's, vcols etc.
* remove 'select' and 'hide' from BMLoop
* remove BMesh.update
* add BMesh.normal_update(skip_hidden=False)
* add BMElemSet.index_update(), eg: bm.verts.index_update()
bmesh api
* BM_mesh_normals_update() now takes skip_hidden as an argument
(previously this was default behavior), however this isnt good when
using BMesh modifiers, where you want all normals to be recalculated.
* add bm_iter_itype_htype_map[], to get the iter type from a BMesh
iterator.
bmesh.utils.face_join(faces)
added a utility function for converting a list of python BMesh elements into a C array.
use for this face_join as well as BMesh.faces.new()
