Add optional z-scale argument, default to unscaled

holocli/src/cli.rs

@@ -33,6 +33,10 @@ pub struct Args {
     /// The density of lines etched per mm. Defaults to 1.
     #[arg(long, default_value_t = 1)]
     pub stroke_density: usize,
+
+    /// The scaling factor for translating z coordinates to circle radius
+    #[arg(long, default_value_t = 1.0)]
+    pub z_scale: f32,
 }
 
 /// Represents a size in millimeters

holocli/src/main.rs

@@ -14,7 +14,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     let user_defined_model = ObjInterpolator::from_file(args.input).unwrap();
     let interpolated_points = user_defined_model.interpolate_edges(args.stroke_density);
 
-    let circle_strat = scriber::CircleScriber::new();
+    let circle_strat = scriber::CircleScriber::new(args.z_scale);
     let scriber = scriber::Scriber::new(
         circle_strat,
         (args.canvas_size.width, args.canvas_size.height),

holoscribe/src/lib.rs

@@ -22,7 +22,7 @@ mod tests {
         let model =
             ObjInterpolator::from_file("tests/icosahedron.obj".to_string()).expect("invalid model");
         let interpolated_points = model.interpolate_edges(100);
-        let circle_strat = scriber::CircleScriber::new();
+        let circle_strat = scriber::CircleScriber::new(1.0);
         let scriber = scriber::Scriber::new(circle_strat, (100, 100));
         b.iter(|| scriber.scribe(&interpolated_points));
     }

holoscribe/src/scriber/mod.rs

@@ -48,8 +48,8 @@ pub struct CircleScriber {
 }
 
 impl CircleScriber {
-    pub fn new() -> Self {
-        CircleScriber { z_scale_factor: 0.25 }
+    pub fn new(z_scale_factor: f32) -> Self {
+        CircleScriber { z_scale_factor }
     }
 }