forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Opus 4.8
bd1a5affd7
A wide polyline's flat band was drawn by the hatch pipeline: a solid fill with only draw-order depth. It ignored the entity linetype (the width "crushed" the dash pattern) and showed through 3-D geometry in a tilted view. Draw the band from the polyline's own centre-line wire instead. A new `WireModel.world_width` (drawing units) makes the wire vertex shader expand the quad by `world_half_width / world_per_pixel` (clamped to a hairline), so the band is sized in world units and tracks zoom. Because it is now a wire: - the GPU dash shader dashes the band by arc-length — the linetype applies; - it is depth-tested at the polyline elevation — no draw-order see-through; - no CPU band triangles or per-dash geometry are generated. `world_half_width` rides in `WireConst` (native, replacing a pad) and the web `WireInstance` (loc 14); both wire shaders branch on it. The tessellator sets `world_width` from the LwPolyline width on the Contour / SegmentedLines arms, and the model-space fill loop no longer emits a hatch band for any LwPolyline. Pick still uses the band polygon (`pick_tris`). Blocks keep the hatch band: `LocalWire` carries no `world_width` (finalize zeroes it), so a scaled insert still scales its band correctly. Co-Authored-By: Claude Opus 4.8 <[email protected]>