more work on tests

Author: timschmidt

src/main.rs

@@ -624,6 +624,7 @@ fn main() {
     );
     let _ = fs::write("stl/spur_cycloid.stl", spur_cycloid.to_stl_ascii("spur_cycloid"));
 
+    /*
     let helical = CSG::helical_involute_gear(
         2.0,   // module
         20,    // z
@@ -635,6 +636,50 @@ fn main() {
         None,
     );
     let _ = fs::write("stl/helical.stl", helical.to_stl_ascii("helical"));
+    */
+    
+    // ---------------------------------------------------------------------
+    // Bézier curve demo ----------------------------------------------------
+    let bezier_ctrl = &[
+        [0.0, 0.0],   // P0
+        [1.0, 2.0],   // P1
+        [3.0, 3.0],   // P2
+        [4.0, 0.0],   // P3
+    ];
+    let bezier_2d = CSG::bezier(bezier_ctrl, 128, None);
+    let _ = fs::write(
+        "stl/bezier_2d.stl",
+        bezier_2d.to_stl_ascii("bezier_2d"),
+    );
+    
+    // give it a little “body” so we can see it in a solid viewer
+    let bezier_3d = bezier_2d.extrude(0.25);
+    let _ = fs::write(
+        "stl/bezier_extruded.stl",
+        bezier_3d.to_stl_ascii("bezier_extruded"),
+    );
+    
+    // ---------------------------------------------------------------------
+    // B-spline demo --------------------------------------------------------
+    let bspline_ctrl = &[
+        [0.0, 0.0],
+        [1.0, 2.5],
+        [3.0, 3.0],
+        [5.0, 0.0],
+        [6.0, -1.5],
+    ];
+    let bspline_2d = CSG::bspline(bspline_ctrl, /* degree p = */ 3, /* seg/span */ 32, None);
+    let _ = fs::write(
+        "stl/bspline_2d.stl",
+        bspline_2d.to_stl_ascii("bspline_2d"),
+    );
+    
+    // a quick thickening just like the Bézier
+    //let bspline_3d = bspline_2d.extrude(0.25);
+    //let _ = fs::write(
+    //    "stl/bspline_extruded.stl",
+    //    bspline_3d.to_stl_ascii("bspline_extruded"),
+    //);
 
     // Done!
     println!("All scenes have been created and written to the 'stl' folder (where applicable).");

src/tests.rs

@@ -117,7 +117,7 @@ fn test_degenerate_polygon_after_clipping() {
     ];
 
     let polygon: Polygon<()> = Polygon::new(vertices.clone(), None);
-    let plane = Plane::from_normal(Vector3::new(0.0, 0.0, 0.0), 0.0);
+    let plane = Plane::from_normal(Vector3::new(0.0, 0.0, 1.0), 0.0);
 
     eprintln!("Original polygon: {:?}", polygon);
     eprintln!("Clipping plane: {:?}", plane);