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philipp-tchandClaude Opus 5.5
e04056f714
A block reference's own linetype scale (DXF group 48) was ignored for the objects in the block: a DASHED line inside a block inserted at linetype scale 2 kept dashes of scale 1. It now multiplies their linetype scale, as LTSCALE does for the whole drawing (and as a dimension's does for its block). Claude-Session: https://claude.ai/code/session_01VP2GTYMskgGjiMw5GT5NL9 Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
55 lines
2.3 KiB
Rust
55 lines
2.3 KiB
Rust
//! The linetype scale of a block reference (DXF group 48 on the INSERT) multiplies the linetype
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//! scale of the objects in the block, as LTSCALE does for the whole drawing: a DASHED line inside
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//! a block inserted at linetype scale 2 has dashes twice as long.
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use std::sync::Arc;
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use cadcraft_doc::{Block, Common, Drawing, Entity, EntityKind, Handle, Insert, Line, Space, library};
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use cadcraft_geom::Vec3;
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use cadcraft_render::{Kind, Options, build};
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/// A block «B» with a 100-unit DASHED line (pattern 0.5 on, 0.25 off), inserted once at the
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/// origin with the given linetype scale; the line's own linetype `own` (DASHED or BYBLOCK).
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fn drawing(ltscale: f64, own: &str) -> Drawing {
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let mut d = Drawing::new_metric();
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d.linetypes.extend(library::standard_linetypes().into_iter().filter(|l| l.name == "DASHED"));
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let mut blk = Block::new("B");
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let mut line = Entity::new(Handle(1), EntityKind::Line(Line { a: Vec3::ZERO, b: Vec3::new(100.0, 0.0, 0.0) }));
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line.common.linetype = own.into();
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blk.entities.push(line);
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d.blocks.insert("B".into(), Arc::new(blk));
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let reference = Common { linetype: "DASHED".into(), ltscale, ..Default::default() };
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let ins = Insert {
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block: "B".into(),
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insert: Vec3::ZERO,
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scale: Vec3::new(1.0, 1.0, 1.0),
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rotation: 0.0,
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attribs: vec![],
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cols: 1,
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rows: 1,
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col_spacing: 0.0,
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row_spacing: 0.0,
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};
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d.add(&Space::Model, reference, EntityKind::Insert(ins)).unwrap();
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d
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}
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/// The lengths of the dashes drawn for the reference, all but the last one (which may be cut).
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fn dashes(d: &Drawing) -> Vec<f64> {
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let l = build(d, &Space::Model, &Options::default());
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let mut out: Vec<f64> =
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l.prims.iter().filter(|p| p.kind == Kind::Polyline).map(|p| l.points(p).windows(2).map(|w| w[0].dist(w[1])).sum()).collect();
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out.pop();
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out
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}
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#[test]
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fn the_linetype_scale_of_a_block_reference_scales_the_dashes_inside() {
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for own in ["DASHED", "BYBLOCK"] {
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let one = dashes(&drawing(1.0, own));
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let two = dashes(&drawing(2.0, own));
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assert!(!one.is_empty() && one.iter().all(|l| (l - 0.5).abs() < 1e-6), "{own}: {one:?}");
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assert!(!two.is_empty() && two.iter().all(|l| (l - 1.0).abs() < 1e-6), "{own}: {two:?}");
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}
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}
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