forked from 1b-agent/opencadstudio-upstream
DWFATTACH / -DWFATTACH and DGNATTACH / -DGNATTACH attach a DWF / DWFx sheet or a DGN (V7 or V8) model with the reference's prompts; ATTACH routes the file types to them. The sheet or model is read into vector paths, drawn as a transparent underlay raster (contrast, fade, monochrome and background adjustment apply) and offers its geometry to object snaps. Definitions are kept in ACAD_DWFDEFINITIONS / ACAD_DGNDEFINITIONS, the External References palette lists and reloads them, and image textures get line-keeping mip levels so thin underlay lines stay visible when zoomed out. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>