extracted strut to fn

Makefile

@@ -1,5 +1,5 @@
-out.scad: e393.selig
-	cargo run --release
+out.scad: e393.selig src/*.rs
+	cargo run
 
 e393.selig:
 	curl http://airfoiltools.com/airfoil/seligdatfile?airfoil=e393-il > e393.selig

src/constants.rs

@@ -0,0 +1,7 @@
+const IN2MM: f32 = 25.4;
+pub const CHORD: f32 = 11.2 * IN2MM;
+pub const WINGSPAN: f32 = 45.0 * IN2MM;
+pub const LENGTH: f32 = 0.0;
+pub const STRUTS: usize = 10;
+pub const STRUT_WIDTH: f32 = 2.4;
+pub const SPAR_SIDE_WIDTH: f32 = 0.75;

src/main.rs

@@ -1,18 +1,42 @@
+use nalgebra::Vector3;
 use scad::*;
+use constants::*;
+use selig::Airfoil;
+mod constants;
 mod selig;
 
 fn main() {
-    let e393 = selig::parse(include_str!("../e393.selig"));
-    let aerofoil = scad::PolygonParameters::new(e393);
-
     let mut scad_file = ScadFile::new();
     scad_file.set_detail(50);
 
-    let strut = scad!(Translate(vec3(2.0, 2.0, 3.0)); {
-        scad!(Polygon(aerofoil))
-    });
+    let e393 = selig::parse(include_str!("../e393.selig"));
 
-    scad_file.add_object(strut.clone());
+    let mut wing = scad!(Translate(vec3(0.0,0.0,0.0)));
+    for strut_idx in 0..STRUTS {
+        let mut transform = scad!(Translate(vec3(0.0, strut_idx as f32 * 30.0 ,0.0)));
+
+        transform.add_child(strut(&e393, CHORD, STRUT_WIDTH));
+        wing.add_child(transform);
+    }
+
+    scad_file.add_object(wing.clone());
 
     scad_file.write_to_file(String::from("out.scad"));
 }
+
+fn strut(airfoil: &Airfoil, length: f32, width: f32) -> ScadObject {
+    let aerofoil = scad::PolygonParameters::new(airfoil.clone());
+    let shape = scad!(Polygon(aerofoil));
+
+    let extrude = LinExtrudeParams {
+        height: width,
+        slices: 5,
+        ..Default::default()
+    };
+
+    let unit: Vector3<f32> = Vector3::new(1.0, 1.0, 1.0);
+    let scaled = scad!(Scale(unit * length); shape);
+    let strut = scad!(LinearExtrude(extrude); scaled);
+    let rotated = scad!(Rotate(90.0, vec3(1.0, 0.0, 0.0)); strut);
+    rotated
+}