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Moddy the Tube test

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This commit is contained in:
numzero 2024-06-28 22:34:16 +03:00
parent e8551f5d02
commit 0a27fc1f9b
1 changed files with 30 additions and 23 deletions
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53
src/bin/flat/tube/metric.rs
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@ -49,29 +49,36 @@ impl Metric for Tube {
} }
} }
#[test] #[cfg(test)]
fn test_tube_metric_derivs() { mod test {
struct Approx(Tube); use glam::{Vec2, vec2};
impl Metric for Approx { use crate::riemann::{Decomp2, Metric};
fn sqrt_at(&self, pos: Vec2) -> Decomp2 { self.0.sqrt_at(pos) } use super::Tube;
}
let testee = Tube { #[test]
inner_radius: 30.0, fn test_tube_metric_derivs() {
outer_radius: 50.0, struct Approx(Tube);
internal_halflength: 100.0, impl Metric for Approx {
external_halflength: 300.0, fn sqrt_at(&self, pos: Vec2) -> Decomp2 { self.0.sqrt_at(pos) }
}; }
let approx = Approx(testee); let testee = Tube {
let epsilon = 1.0e-3; inner_radius: 30.0,
let margin = 1.0 / 16.0; outer_radius: 50.0,
let mul = 1.0 + margin; internal_halflength: 100.0,
for x in itertools_num::linspace(-mul * testee.outer_radius, mul * testee.outer_radius, 100) { external_halflength: 300.0,
for y in itertools_num::linspace(-mul * testee.external_halflength, mul * testee.external_halflength, 100) { };
let pos = vec2(x, y); let approx = Approx(testee);
let computed = testee.part_derivs_at(pos); let epsilon = 1.0e-3;
let reference = approx.part_derivs_at(pos); let margin = 1.0 / 16.0;
let eq = (0..2).all(|coord| computed[coord].abs_diff_eq(reference[coord], epsilon)); let mul = 1.0 + margin;
assert!(eq, "Bad derivative computation at {pos}:\n explicit: {computed:?}\n numerical: {reference:?}\n"); for x in itertools_num::linspace(-mul * testee.outer_radius, mul * testee.outer_radius, 100) {
for y in itertools_num::linspace(-mul * testee.external_halflength, mul * testee.external_halflength, 100) {
let pos = vec2(x, y);
let computed = testee.part_derivs_at(pos);
let reference = approx.part_derivs_at(pos);
let eq = (0..2).all(|coord| computed[coord].abs_diff_eq(reference[coord], epsilon));
assert!(eq, "Bad derivative computation at {pos}:\n explicit: {computed:?}\n numerical: {reference:?}\n");
}
} }
} }
} }