Load elevator airfoil separately

Makefile

@@ -1,3 +1,8 @@
+MAIN_AIRFOIL     = ag41d
+ELEVATOR_AIRFOIL = b540ols-il
+RUDDER_AIRFOIL   = ht13
+TAIL             = t-tail
+
 UNAME = $(shell uname)
 ifeq ($(UNAME), Linux)
 	SCAD = openscad
@@ -6,14 +11,24 @@ ifeq ($(UNAME), Darwin)
 	SCAD = OpenSCAD
 endif
 
+AIRFOILS = $(MAIN_AIRFOIL).dat $(ELEVATOR_AIRFOIL).dat $(RUDDER_AIRFOIL).dat
+
 b: build/allparts.svg
 
 build:
 	mkdir -p build
 
-build/%.scad: src/*.rs ag24.dat m1-il.dat
+build/assembly.scad: src/*.rs $(AIRFOILS)
 	mkdir -p build
-	cargo run
+	cargo run $(AIRFOILS) $(TAIL) assembly
+
+build/part%.scad: src/*.rs $(AIRFOILS)
+	mkdir -p build
+	cargo run $(AIRFOILS) parts $(TAIL)
+
+build/allparts.scad: src/*.rs $(AIRFOILS)
+	mkdir -p build
+	cargo run $(AIRFOILS) sheet $(TAIL)
 
 e393.dat:
 	curl http://airfoiltools.com/airfoil/seligdatfile?airfoil=e393-il -o e393.dat
@@ -21,6 +36,9 @@ e393.dat:
 ag24.dat:
 	curl https://m-selig.ae.illinois.edu/ads/coord/ag24.dat -o ag24.dat
 
+ag41d.dat:
+	curl https://web.mit.edu/drela/Public/web/avl/runs/ag41d.dat -o $@
+
 sd8020.dat:
 	curl http://airfoiltools.com/airfoil/seligdatfile?airfoil=sd8020-il -o $@
 
@@ -35,7 +53,7 @@ edgevertical.dat: edgevertical.zip
 	unzip -p edgevertical.zip Edge-Vertical.dat > edgevertical.dat
 
 build/%.png:  build/%.scad
-	$(SCAD) --colorscheme Metallic -o $@ $<
+	$(SCAD) --imgsize 1920,1080 --colorscheme Metallic -o $@ $<
 
 build/%.svg:  build/%.scad
 	$(SCAD) -o $@ $<
@@ -49,11 +67,11 @@ build/%.dxf:  build/%.scad
 build/%.dwg:  build/%.svg
 	svg2dwg -no-gui -no-dock-icon -o $@ $<
 
-.PHONY: svgs dxfs clean b
+.PHONY: svgs dxfs clean b v-tail
-svgs: build/%.scad
+svgs: build/part%.scad
 	ls build/part*.scad | sed 's/scad/svg/' | xargs make
 
-dxfs: build/%.scad
+dxfs: build/part%.scad
 	ls build/part*.scad | sed 's/scad/dxf/' | xargs make
  
 clean:
@@ -62,14 +80,20 @@ clean:
 	cargo clean
 
 vis: build/assembly-clear.scad
-	openscad build/assembly-clear.scad
+	$(SCAD) build/assembly-clear.scad
+
+v-tail: src/*.rs $(AIRFOILS)
+	cargo run $(AIRFOILS) v-tail assembly sheet parts
+
+t-tail: src/*.rs $(AIRFOILS)
+	cargo run $(AIRFOILS) t-tail assembly sheet parts
 
 build/testwing-clear.scad: build/testwing.scad
 	sed 's/color("clear-red")/color([1.0,1.0,0.0,0.9])/g' $< > $@
 	sed 's/color("clear-blue")/color([0.0,1.0,1.0,1.0])/g' -i $@
 
-build/assembly-clear.scad: build/assembly.scad
+build/assembly-clear.scad: src/*.rs $(AIRFOILS) build
-	cargo run --features film
+	cargo run $(AIRFOILS) assembly $(TAIL) film stdout |\
-	sed 's/color("clear-red")/color([1.0,0.0,0.0,0.5])/g' $< > $@
+	sed 's/color("clear-red")/color([1.0,0.0,0.0,0.5])/g' |\
-	sed 's/color("clear-blue")/color([0.0,1.0,0.0,0.9])/g' -i $@
+	sed 's/color("clear-blue")/color([0.0,1.0,0.0,0.9])/g' |\
-	sed 's/color("clear-blue")/color([0.0,0.0,1.0,0.9])/g' -i $@
+	sed 's/color("clear-blue")/color([0.0,0.0,1.0,0.9])/g' > $@

src/main.rs

@@ -3,26 +3,59 @@ use nalgebra::Vector3;
 use scad::*;
 use selig::SeligFile;
 use selig::Span;
+use std::env::args;
+use std::path::Path;
 use std::ops::Range;
 mod constants;
 mod selig;
 
 fn main() {
+    let mut args = args().skip(1);
+    let main_airfoil_path = args.next().unwrap();
+    let main_airfoil_path = Path::new(&main_airfoil_path);
+    let elevator_airfoil_path = args.next().unwrap();
+    let elevator_airfoil_path = Path::new(&elevator_airfoil_path);
+    let rudder_airfoil_path = args.next().unwrap();
+    let rudder_airfoil_path = Path::new(&rudder_airfoil_path);
+    let args: Vec<String> = args.collect();
+    let gen_film = args.contains(&"film".to_string());
+    let gen_v_tail = args.contains(&"v-tail".to_string());
+    let gen_t_tail = args.contains(&"t-tail".to_string());
+    let gen_parts = args.contains(&"parts".to_string());
+    let gen_allparts = args.contains(&"sheet".to_string());
+    let gen_assembly = args.contains(&"assembly".to_string());
+    let gen_test = args.contains(&"test".to_string());
+    let stdout = args.contains(&"stdout".to_string());
+
     let mut scad_file = ScadFile::new();
 
     let mut parts = Vec::new();
     scad_file.set_detail(50);
 
     // cambered airfoil, used in the wing
-    let wing_airfoil: SeligFile = SeligFile::parse(include_str!("../ag24.dat"));
+    let wing_airfoil: SeligFile = SeligFile::load(main_airfoil_path).unwrap();
+    eprintln!("Main airfoil: {}", wing_airfoil.get_name());
+    if let Some(desc) = wing_airfoil.get_description() {
+        eprintln!("{}", desc);
+    }
 
-    // symmetric airfoil, used in the control surfaces
+    // symmetric airfoil
-    let control_airfoil: SeligFile = SeligFile::parse(include_str!("../m1-il.dat"));
+    let rudder_airfoil: SeligFile = SeligFile::load(rudder_airfoil_path).unwrap();
+    eprintln!("Rudder airfoil: {}", rudder_airfoil.get_name());
+    if let Some(desc) = rudder_airfoil.get_description() {
+        eprintln!("{}", desc);
+    }
+
+    let elevator_airfoil: SeligFile = SeligFile::load(elevator_airfoil_path).unwrap();
+    eprintln!("Elevator airfoil: {}", elevator_airfoil.get_name());
+    if let Some(desc) = elevator_airfoil.get_description() {
+        eprintln!("{}", desc);
+    }
 
     // main wing
     let mut wing_transform = mirrored_wing(&wing_airfoil, &WING);
 
-    #[cfg(feature = "film")] {
+    if gen_film {
         let mut wrapped = scad!(Hull; wing_transform.visualization.clone());
         wrapped = scad!(Minkowski; wrapped);
         wrapped.add_child(scad!(Sphere(Radius(1.0))));
@@ -33,23 +66,100 @@ fn main() {
     parts.append(wing_transform.parts.as_mut());
 
     // "fuselage"
+    let mut fuselage = spar(LENGTH);
     scad_file.add_object(scad!(Rotate(-90.0, vec3(0.0, 0.0, 1.0));
-        spar(LENGTH, false)));
+        fuselage.visualization));
+    parts.append(fuselage.parts.as_mut());
 
+    if gen_t_tail {
+        t_tail(
+            &rudder_airfoil,
+            &mut parts,
+            &mut scad_file,
+            &elevator_airfoil,
+            gen_film,
+        );
+    }
+    if gen_v_tail {
+        v_tail(
+            &rudder_airfoil,
+            &mut parts,
+            &mut scad_file,
+            &elevator_airfoil,
+            gen_film,
+        );
+    }
+
+    if gen_assembly {
+        // every part visualized together
+        if stdout {
+            print!("{}",scad_file.get_code());
+        } else {
+            scad_file.write_to_file(String::from("build/assembly.scad"));
+        }
+    }
+
+    if gen_parts {
+        // every part in seperate files
+        for (idx, part) in parts.clone().into_iter().enumerate() {
+            let mut file = ScadFile::new();
+            file.set_detail(50);
+            file.add_object(part);
+            if stdout {
+                print!("{}",file.get_code());
+            } else {
+                file.write_to_file(format!("build/part{idx:0>3}.scad"));
+            }
+        }
+    }
+
+    if gen_allparts {
+        // all parts in one file
+        let mut allparts = ScadFile::new();
+        parts.push(scad!(Square(vec2(STOCK_WIDTH, STOCK_HEIGHT))));
+        allparts.set_detail(50);
+        for (idx, part) in parts.into_iter().enumerate() {
+            allparts.add_object(scad!(Translate2d(vec2(0.0, INF * idx as f32)); part));
+        }
+        if stdout {
+            print!("{}",scad_file.get_code());
+        } else {
+            allparts.write_to_file("build/allparts.scad".to_string());
+        }
+    }
+
+    if gen_test {
+        // test airfoil
+        let mut test = ScadFile::new();
+        let test_airfoil = SeligFile::parse(include_str!("../m1-il.dat"));
+        let wing = wing(&test_airfoil, &RUDDER, SparType::Top);
+        test.add_object(scad!(NamedColor("clear-blue".to_string()); wing.0.visualization));
+        test.add_object(scad!(NamedColor("clear-red".to_string()); wing.1.visualization));
+        if stdout {
+            print!("{}",test.get_code());
+        } else {
+            test.write_to_file(String::from("build/testwing.scad"));
+        }
+    }
+}
+
+fn t_tail(
+    control_airfoil: &SeligFile,
+    parts: &mut Vec<ScadObject>,
+    scad_file: &mut ScadFile,
+    wing_airfoil: &SeligFile,
+    gen_film: bool,
+) {
     // rudder
     let mut rudder = scad!(Rotate(90.0, vec3(1.0, 0.0, 0.0)));
-    let (mut struts,mut spar) = wing(
+    let (mut struts, mut spar) = wing(&control_airfoil, &RUDDER, SparType::Center);
-        &control_airfoil,
-        &RUDDER,
-        SparType::Center,
-    );
     rudder.add_child(struts.visualization);
     rudder.add_child(spar.visualization);
     parts.append(struts.parts.as_mut());
     parts.append(spar.parts.as_mut());
     rudder = scad!(Translate(vec3(LENGTH-RUDDER_CHORD, 0.0, 0.0)); rudder);
 
-    #[cfg(feature = "film")] {
+    if gen_film {
         let mut wrapped = scad!(Hull; rudder.clone());
         wrapped = scad!(Minkowski; wrapped);
         wrapped.add_child(scad!(Sphere(Radius(1.0))));
@@ -61,7 +171,7 @@ fn main() {
     // elevator
     let mut elevator = mirrored_wing(&wing_airfoil, &ELEVATOR);
 
-    #[cfg(feature = "film")] {
+    if gen_film {
         let elevator = scad!(Translate(vec3(LENGTH - ELEVATOR_CHORD, 0.0, 0.0)); elevator.visualization.clone());
         let mut wrapped = scad!(Hull; elevator);
         wrapped = scad!(Minkowski; wrapped);
@@ -69,36 +179,44 @@ fn main() {
         scad_file.add_object(scad!(NamedColor("clear-red".to_string()); wrapped));
     }
 
-    scad_file.add_object(scad!(Translate(vec3(LENGTH - ELEVATOR_CHORD, 0.0, 0.0)); elevator.visualization));
+    scad_file.add_object(
+        scad!(Translate(vec3(LENGTH - ELEVATOR_CHORD, 0.0, 0.0)); elevator.visualization),
+    );
     parts.append(&mut elevator.parts);
+}
 
-    // every part visualized together
+fn v_tail(
-    scad_file.write_to_file(String::from("build/assembly.scad"));
+    _control_airfoil: &SeligFile,
+    parts: &mut Vec<ScadObject>,
+    scad_file: &mut ScadFile,
+    wing_airfoil: &SeligFile,
+    gen_film: bool,
+) {
+    // rudder
+    let mut ruddervators = scad!(Union);
+    let mut ruddervator = scad!(Union);
+    ruddervator = scad!(Rotate(60.0, vec3(1.0, 0.0, 0.0)); ruddervator);
+    let (mut struts, mut spar) = wing(&wing_airfoil, &RUDDER, SparType::Top);
+    ruddervator.add_child(struts.visualization);
+    ruddervator.add_child(spar.visualization);
+    ruddervator = scad!(Translate(vec3(0.0, FUSELAGE_GAP, 0.0)); ruddervator);
+    parts.append(struts.parts.clone().as_mut());
+    parts.append(spar.parts.clone().as_mut());
+    parts.append(struts.parts.as_mut());
+    parts.append(spar.parts.as_mut());
+    ruddervators.add_child(scad!(Mirror(vec3(0.0, 1.0, 0.0)); ruddervator.clone()));
+    ruddervators.add_child(ruddervator);
+    ruddervators = scad!(Translate(vec3(LENGTH-RUDDER_CHORD, 0.0, 0.0)); ruddervators);
 
-    // every part in seperate files
+    if gen_film {
-    for (idx, part) in parts.clone().into_iter().enumerate() {
+        // this won't look right
-        let mut file = ScadFile::new();
+        let mut wrapped = scad!(Hull; ruddervators.clone());
-        file.set_detail(50);
+        wrapped = scad!(Minkowski; wrapped);
-        file.add_object(part);
+        wrapped.add_child(scad!(Sphere(Radius(1.0))));
-        file.write_to_file(format!("build/part{idx:0>3}.scad"));
+        scad_file.add_object(scad!(NamedColor("clear-red".to_string()); wrapped));
     }
 
-    // all parts in one file
+    scad_file.add_object(ruddervators);
-    let mut allparts = ScadFile::new();
-    parts.push(scad!(Square(vec2(STOCK_WIDTH, STOCK_HEIGHT))));
-    allparts.set_detail(50);
-    for (idx, part) in parts.into_iter().enumerate() {
-        allparts.add_object(scad!(Translate2d(vec2(0.0, INF * idx as f32)); part));
-    }
-    allparts.write_to_file("build/allparts.scad".to_string());
-
-    // test airfoil
-    let mut test = ScadFile::new();
-    let test_airfoil = SeligFile::parse(include_str!("../m1-il.dat"));
-    let wing = wing(&test_airfoil, &RUDDER, SparType::Top);
-    test.add_object(scad!(NamedColor("clear-blue".to_string()); wing.0.visualization));
-    test.add_object(scad!(NamedColor("clear-red".to_string()); wing.1.visualization));
-    test.write_to_file(String::from("build/testwing.scad"));
 }
 
 /// A physical object
@@ -116,11 +234,6 @@ impl Construct {
             parts,
         }
     }
-    
-    /// A construct with no parts
-    fn cosmetic(visualization: ScadObject) -> Self {
-        Construct { visualization, parts: Vec::new() }
-    }
 
     /// Convert to tuple
     /// (visualization, parts)
@@ -142,7 +255,7 @@ fn mirrored_wing(wing_airfoil: &SeligFile, wing_config: &WingConfig) -> Construc
 
         parts.append(strut.parts.as_mut());
 
-        let transform = Translate(vec3(0.0, FUSELAGE_GAP,0.0));
+        let transform = Translate(vec3(0.0, FUSELAGE_GAP, 0.0));
 
         wing = scad!(transform.clone(); wing);
         top_spar_neg = scad!(transform; top_spar_neg);
@@ -164,46 +277,53 @@ fn mirrored_wing(wing_airfoil: &SeligFile, wing_config: &WingConfig) -> Construc
         (false, true, false),
     ));
     parts.push(scad!(Projection(false); symetric_spar.clone()));
-    Construct::new(
+    Construct::new(wing_transform.clone(), parts)
-        wing_transform.clone()
-        , parts)
 }
 
 /// Returns (struts, spar)
-fn wing(wing_airfoil: &SeligFile, wing_config: &WingConfig, spar: SparType) -> (Construct, Construct) {
+fn wing(
-    let (wing, wing_parts) = wing_struts(
+    wing_airfoil: &SeligFile,
-        wing_airfoil,
+    wing_config: &WingConfig,
-        wing_config,
+    spar: SparType,
-        &spar,
+) -> (Construct, Construct) {
-    ).tup();
+    let (wing, wing_parts) = wing_struts(wing_airfoil, wing_config, &spar).tup();
     // TODO: other spar types
     let spar = match spar {
         SparType::None => {
-
             scad!(Union)
-        },
+        }
         SparType::Top => {
-            let top_spar = topwing_spar(
+            let top_spar = topwing_spar(wing_airfoil, wing_config);
-                wing_airfoil,
-                wing_config,
-            );
             let mut spar = scad!(Difference; top_spar);
             spar.add_child(wing.clone());
             spar
-        },
+        }
         SparType::Center => {
             // TODO: taper
             let mut mid_spar = scad!(Hull);
-            let bottom = centered_cube(vec3(wing_config.chord * (MIDSPAR_RANGE.end - MIDSPAR_RANGE.start) , CARDBOARD_WIDTH, CARDBOARD_WIDTH), (false, false, true));
+            let bottom = centered_cube(
-            let mut top = scad!(Translate(vec3(wing_config.taper * MIDSPAR_RANGE.start * wing_config.chord - MIDSPAR_RANGE.start * wing_config.chord, wing_config.length, 0.0)));
+                vec3(
+                    wing_config.chord * (MIDSPAR_RANGE.end - MIDSPAR_RANGE.start),
+                    CARDBOARD_WIDTH,
+                    CARDBOARD_WIDTH,
+                ),
+                (false, false, true),
+            );
+            let mut top = scad!(Translate(vec3(
+                wing_config.taper * MIDSPAR_RANGE.start * wing_config.chord
+                    - MIDSPAR_RANGE.start * wing_config.chord,
+                wing_config.length,
+                0.0
+            )));
             top.add_child(scad!(Scale(vec3(wing_config.taper, 1.0, 1.0)); bottom.clone()));
             mid_spar.add_child(top);
             mid_spar.add_child(bottom);
-            mid_spar = scad!(Translate(vec3(MIDSPAR_RANGE.start * wing_config.chord, 0.0, 0.0)); mid_spar);
+            mid_spar =
+                scad!(Translate(vec3(MIDSPAR_RANGE.start * wing_config.chord, 0.0, 0.0)); mid_spar);
             let mut spar = scad!(Difference; mid_spar);
             spar.add_child(wing.clone());
             spar
-        },
+        }
     };
 
     let spar_flat = scad!(Projection(false); spar.clone());
@@ -215,6 +335,7 @@ fn wing(wing_airfoil: &SeligFile, wing_config: &WingConfig, spar: SparType) -> (
 
 enum SparType {
     /// No spar, just struts
+    #[allow(unused)]
     None,
     /// Spar along the top of the wing
     Top,
@@ -232,7 +353,7 @@ fn strut(airfoil: &SeligFile, chord: f32, width: f32, spar: &SparType) -> Constr
         match spar {
             SparType::Top => topspar_negative(airfoil, chord, TOPSPAR_RANGE),
             SparType::Center => {
-                scad!(Translate2d(vec2(MIDSPAR_RANGE.start, 0.0)); 
+                scad!(Translate2d(vec2(MIDSPAR_RANGE.start, 0.0));
                 centered_square(vec2(MIDSPAR_RANGE.end -  MIDSPAR_RANGE.start, CARDBOARD_WIDTH/ chord), (false,true))
                 )
             }
@@ -267,12 +388,7 @@ fn strut(airfoil: &SeligFile, chord: f32, width: f32, spar: &SparType) -> Constr
     }
 }
 
-fn extrude_strut(
+fn extrude_strut(shape: ScadObject, strut_hole: ScadObject, width: f32, chord: f32) -> ScadObject {
-    shape: ScadObject,
-    strut_hole: ScadObject,
-    width: f32,
-    chord: f32,
-) -> ScadObject {
     let mut strut_shape = scad!(Difference);
     strut_shape.add_child(shape);
     strut_shape.add_child(strut_hole);
@@ -319,14 +435,19 @@ fn topspar_negative(airfoil: &SeligFile, chord: f32, range: Range<f32>) -> ScadO
     mask
 }
 
-// TODO: shift to trangle design
+fn spar(length: f32) -> Construct {
-fn spar(length: f32, center: bool) -> ScadObject {
     let mut spar = scad!(Union);
 
-    //register_part(scad!(Square(vec2(length, SPAR_SIDE_WIDTH * 3.0))));
+    let parts = vec![scad!(Square(vec2(length, SPAR_SIDE_WIDTH * 3.0)))];
 
-    let top = centered_cube(vec3(SPAR_SIDE_WIDTH, length, CARDBOARD_WIDTH), (true,false,false));
+    let top = centered_cube(
-    let mut left = centered_cube(vec3(SPAR_SIDE_WIDTH, length, CARDBOARD_WIDTH), (false,false,false));
+        vec3(SPAR_SIDE_WIDTH, length, CARDBOARD_WIDTH),
+        (true, false, false),
+    );
+    let mut left = centered_cube(
+        vec3(SPAR_SIDE_WIDTH, length, CARDBOARD_WIDTH),
+        (false, false, false),
+    );
     left = scad!(Rotate(120.0, vec3(0.0, 1.0, 0.0)); left);
     left = scad!(Translate(vec3(SPAR_SIDE_WIDTH/2.0, 1.0, 0.0)); left);
     let right = scad!(Mirror(vec3(1.0, 0.0, 0.0)); left.clone());
@@ -335,18 +456,17 @@ fn spar(length: f32, center: bool) -> ScadObject {
     spar.add_child(right);
     spar.add_child(top);
 
-    spar
+    Construct {
+        visualization: spar,
+        parts,
+    }
 }
 
 fn lerp(a: f32, b: f32, x: f32) -> f32 {
     a * (1.0 - x) + b * x
 }
 
-fn wing_struts(
+fn wing_struts(aerofoil: &SeligFile, config: &WingConfig, spar: &SparType) -> Construct {
-    aerofoil: &SeligFile,
-    config: &WingConfig,
-    spar: &SparType,
-) -> Construct {
     let mut wing = scad!(Translate(vec3(0.0, 0.0, 0.0)));
     let mut parts = Vec::new();
 
@@ -354,7 +474,11 @@ fn wing_struts(
     for strut_idx in 0..config.struts + 1 {
         let gap = config.length / config.struts as f32;
 
-        let chord = lerp(config.chord, config.chord * config.taper, strut_idx as f32 / config.struts as f32);
+        let chord = lerp(
+            config.chord,
+            config.chord * config.taper,
+            strut_idx as f32 / config.struts as f32,
+        );
 
         let spacing = strut_idx as f32 * gap;
 
@@ -366,13 +490,13 @@ fn wing_struts(
         wing.add_child(transform);
     }
 
-    Construct { visualization: wing, parts }
+    Construct {
+        visualization: wing,
+        parts,
+    }
 }
 
-fn topwing_spar(
+fn topwing_spar(aerofoil: &SeligFile, config: &WingConfig) -> ScadObject {
-    aerofoil: &SeligFile,
-    config: &WingConfig
-) -> ScadObject {
     let mut wing = scad!(Hull);
 
     let mut pre_vis = scad!(Union);
@@ -381,7 +505,11 @@ fn topwing_spar(
     for strut_idx in 0..config.struts + 1 {
         let gap = config.length / config.struts as f32;
 
-        let chord = lerp(config.chord, config.chord * config.taper, strut_idx as f32 / config.struts as f32);
+        let chord = lerp(
+            config.chord,
+            config.chord * config.taper,
+            strut_idx as f32 / config.struts as f32,
+        );
 
         let spacing = strut_idx as f32 * gap;
 
@@ -402,8 +530,10 @@ fn topwing_spar(
 /// Parameters for what would be half of a symmetrical (port/starboard) wing
 /// All distance units are millimeters
 pub struct WingConfig {
-    pub length: f32, /// half of the wingspan
+    pub length: f32,
+    /// half of the wingspan
     pub chord: f32,
-    pub taper: f32, /// chord at wingtip in relation to the chord at the root
+    pub taper: f32,
+    /// chord at wingtip in relation to the chord at the root
     pub struts: usize,
 }

src/selig.rs

@@ -1,4 +1,5 @@
-use std::ops::Range;
+use std::{ops::Range, path::Path, fs::File, io::Read};
+use std::io;
 
 use nalgebra::Vector2;
 
@@ -37,6 +38,12 @@ impl SeligFile {
         }
     }
 
+    pub fn load(path: &Path) -> io::Result<Self> {
+        let mut buf = String::new();
+        File::open(path)?.read_to_string(&mut buf)?;
+        io::Result::Ok(Self::parse(&buf))
+    }
+
     pub fn get_points(&self) -> &Airfoil {
         &self.data
     }