An ocs_gcs Ellipse stores focus1 as an absolute point rather than an
offset from center, so a constraint that pulls only on center (e.g.
Concentric) left focus1's absolute coordinates untouched while center
moved — changing the derived focus1-center vector that major_axis and
minor_axis_ratio are computed from on write-back, so the ellipse visibly
rotated and reshaped even though nothing asked it to.
solve_scope now adds two Difference constraints per registered ellipse
pinning focus1.x-center.x and focus1.y-center.y to their pre-solve
values, so focus1 translates rigidly with center unless something
actually constrains it. Fixed's Ellipse arm no longer re-pins focus1
directly since that's now redundant with these rules.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
Add MTP (Midpoint Between Two Points) as a keyword that can be typed
during any point-picking command (e.g. LINE) to suspend the current
command, prompt for two points, and return the midpoint to the parent.
- New Mid2PointCommand registered under both "MTP" and "M2P" aliases
- ReturnPoint CmdResult variant feeds the resolved midpoint back to
the suspended parent command
- MTP/M2P typed during a point step suspends the active command and
starts the midpoint modifier; Escape restores the parent command
- Preview wires show a rubber-band line with a triangle marker at
the midpoint
- Character-by-character typing is routed correctly even with dynamic
input active (digits no longer leak into dyn fields)
- Three automation tests cover the full workflow, ESC restoration, and
dynamic-input character routing
The DWG writer truncates an XRecord Chunk to u8::MAX bytes, so a sketch's
constraint set or named-parameter table silently lost every entry on the
next DWG open once serialization passed ~255 bytes (found live: a
23-constraint demo round-tripped fine through DXF but came back empty
through DWG). Split the blob across multiple same-code 310 entries on
save and reassemble them on load, entirely on the OCS side.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
