forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Opus 5
188d1a9ccb
A DIMENSION references the block "that contains the entities that make up the dimension picture", and that block is the picture: AutoCAD requires it and draws it, BricsCAD draws it when present and only renders from the dimension variables when it is missing. OCS re-derived the picture from DIMVARS every time and ignored the block entirely. That works while a style agrees with what the drawing actually drew. A Revit-exported schedule here does not: its style stores DIMTXT already in drawing units beside a DIMSCALE meant to scale it, so the text came out three hundred times too tall, and each dimension carries a DIMFXL override that is likewise already in drawing units, so the extension lines ran nearly a million units past the points they measure. Neither is guesswork about units now. The block holds the geometry the drawing was authored with, so it is drawn: the contents are already in world space and the block's base point is the origin, and the identity instance that carries them exists only to reuse the scene graph's ByBlock / layer-0 colour resolution. Every wire answers to the dimension, so a pick still selects the dimension rather than one of its pieces. Re-deriving stays as the fallback for a dimension with no block. Annotative dimensions keep the old path: their several representations are separate blocks and choosing between them is what the annotation machinery already does, while the doctrine above assumes one picture. A picture is only good while its inputs hold, so it is dropped when they change: editing a dimension's properties, and saving the dimension style it is drawn with. Entity edits already dropped it. Co-Authored-By: Claude Opus 5 <[email protected]>