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Viewport scale list: add engineering scales for imperial drawings (fixes #851) (#866)

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Marco Arnulfo
2026-10-13 04:38:08 -04:00
committed by GitHub
parent a10e43cb2a
commit 7b723b7bc0
1 changed files with 25 additions and 1 deletions
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crates/ui-egui/src/vpscale.rs
+25 -1
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@@ -54,11 +54,23 @@ pub const ARCHITECTURAL: &[(&str, f64)] = &[
("1'-0\" = 1'-0\"", 1.0),
];
/// The scales offered for a drawing: ratios, plus architectural scales when it is imperial.
/// Engineering (civil) scales for imperial drawings: one paper inch per tens of model feet.
pub const ENGINEERING: &[(&str, f64)] = &[
("1\" = 10'-0\"", 1.0 / 120.0),
("1\" = 20'-0\"", 1.0 / 240.0),
("1\" = 30'-0\"", 1.0 / 360.0),
("1\" = 40'-0\"", 1.0 / 480.0),
("1\" = 50'-0\"", 1.0 / 600.0),
("1\" = 60'-0\"", 1.0 / 720.0),
("1\" = 100'-0\"", 1.0 / 1200.0),
];
/// The scales offered for a drawing: ratios, plus architectural and engineering scales when it is imperial.
pub fn scales(metric: bool) -> Vec<(&'static str, f64)> {
let mut v = RATIOS.to_vec();
if !metric {
v.extend_from_slice(ARCHITECTURAL);
v.extend_from_slice(ENGINEERING);
}
v
}
@@ -170,4 +182,16 @@ mod tests {
assert_eq!(label(f64::NAN, true), "?");
assert_eq!(label(0.0, true), "?");
}
#[test]
fn engineering_scales_for_imperial_drawings() {
assert_eq!(label(1.0 / 120.0, false), "1\" = 10'-0\"");
assert_eq!(label(1.0 / 240.0, false), "1\" = 20'-0\"");
assert_eq!(label(1.0 / 1200.0, false), "1\" = 100'-0\"");
assert_eq!(label(1.0 / 240.0, true), "1:240");
let names: Vec<_> = scales(false).into_iter().map(|(n, _)| n).collect();
for n in ["1\" = 10'-0\"", "1\" = 20'-0\"", "1\" = 30'-0\"", "1\" = 40'-0\"", "1\" = 50'-0\"", "1\" = 60'-0\"", "1\" = 100'-0\""] {
assert!(names.contains(&n), "{n} missing");
}
}
}