* EXPLODE: a block reference with different X and Y scales gives ellipses, not circles
EXPLODE of a block reference whose X and Y scales differ kept its circles
as circles with the mean scale, its arcs as circular arcs, its ellipses
with their old ratio and its polyline arcs as circular bulges: not the
shape the reference draws. BURST and INSERT with explode go the same way.
When the reference's transform isn't a similarity, a circle now becomes a
full ELLIPSE, an arc an elliptical arc, an ellipse gets its true axes, and
a polyline with arc segments (and no widths) its lines and elliptical
arcs. Everything else, and every evenly scaled or mirrored reference,
transforms as before.
The exact ellipse transform and the similarity test move unchanged from
snap.rs to cadcraft-geom (Ellipse::transformed, Mat3::similarity_scale)
and are shared by object snaps and EXPLODE.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* contributors: add Tyler-Chiriboga
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Tyler Chiriboga <18270301+Tyler-Chiriboga@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
* Polyface meshes stay one object through DXF and DWG
A polyface mesh (POLYLINE flag 64) was read as loose 3D faces. It is now
read, drawn, exploded into its 3D faces and written back as a POLYLINE.
Hidden edges aren't drawn. A mesh too large for the 16-bit groups 71-74
is saved as 3D faces.
Split from #1005.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* A polyface face ends at its first zero index
A face record with a gap ([1, 2, 0, 3]) has two corners and is dropped,
not read as a triangle.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* Polyface meshes: write only faces that name their vertices; ID gives their Z
The writer drops the faces the reader would drop, so no record names a
missing vertex, and the 16-bit check only needs the counts. ID and DIST
give a mesh the Z of its nearest visible edge, as they do for 3D faces.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>
