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This commit is contained in:
Andy Killorin 2023-11-01 14:15:47 -05:00
parent 8997e31cf4
commit e4863440c0
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GPG key ID: 8CB11B45B690DC2A
2 changed files with 50 additions and 34 deletions
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52
src/main.rs
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@ -4,6 +4,8 @@ use nalgebra::Vector3;
use scad::*;
use constants::*;
use selig::Airfoil;
use selig::Point;
use std::ops::Range;
mod constants;
mod selig;
@ -19,9 +21,11 @@ fn main() {
let wing_airfoil: Airfoil = Airfoil::parse(include_str!("../ag24.dat"));
println!("name {}, perim {}", wing_airfoil.get_name(), wing_airfoil.perimiter());
println!("desc {}", wing_airfoil.get_description().clone().unwrap_or("no desc".to_string()));
println!("span {:?}", wing_airfoil.points_in_range(0.0..1.0));
//println!("span {:?}", points_in_range(wing_airfoil.get_points()[0..80], 0.0..1.0));
let span = wing_airfoil.points_in_range(0.0.. wing_airfoil.perimiter() * 0.4);
let points = &wing_airfoil.get_points()[0..80];
let perimeter = span_length(points);
let span = points_in_range(&Vec::from(points), perimeter * 0.4.. perimeter);
let points = scad::PolygonParameters::new(span);
register_part(scad!(Polygon(points)));
@ -158,3 +162,47 @@ fn wing(aerofoil: &Airfoil, struts: usize, length: f32, chord: f32, taper: f32)
wing
}
pub fn points_in_range(input: &Vec<Point>, range: Range<f32>) -> Vec<Point> {
let mut last_point: Option<Point> = None;
let mut distance: f32 = 0.0;
let mut points: Vec<Point> = Vec::new();
for point in input {
if let Some(last) = last_point {
let span: f32 = (last - point).magnitude();
match (range.contains(&distance), range.contains(&(distance+span))) {
(true, true) => { // fully within span
points.push(point.clone());
println!("in {span}");
},
(false, true) => { // entering span
let undershoot = distance - range.start;
let part_out = (span - undershoot) / span;
points.push(last.lerp(&point, part_out));
println!("enter");
},
(true, false) => { // exiting span
let overshoot = range.end - distance;
let part_in = (span - overshoot) / span;
points.push(last.lerp(&point, part_in));
},
_ => {},
}
distance += span;
}
last_point = Some(point.clone());
}
points
}
fn span_length(points: &[Point]) -> f32 {
let mut last_point: Option<Point> = None;
let mut distance: f32 = 0.0;
for point in points {
if let Some(last) = last_point {
distance += (last - point).magnitude();
}
last_point = Some(point.clone());
}
distance
}

32
src/selig.rs
View file

@ -59,36 +59,4 @@ impl Airfoil {
}
distance
}
pub fn points_in_range(&self, range: Range<f32>) -> Vec<Point> {
let mut last_point: Option<Point> = None;
let mut distance: f32 = 0.0;
let mut points = Vec::new();
for point in self.get_points() {
if let Some(last) = last_point {
let span = (last - point).magnitude();
match (range.contains(&distance), range.contains(&(distance+span))) {
(true, true) => { // fully within span
points.push(point.clone());
println!("in {span}");
},
(false, true) => { // entering span
let undershoot = distance - range.start;
let part_out = (span - undershoot) / span;
points.push(last.lerp(&point, part_out));
println!("enter");
},
(true, false) => { // exiting span
let overshoot = range.end - distance;
let part_in = (span - overshoot) / span;
points.push(last.lerp(&point, part_in));
},
_ => {},
}
distance += span;
}
last_point = Some(point.clone());
}
points
}
}