Make minor cleanups related to the geometry layer

crates/fj-core/src/algorithms/approx/curve.rs

@@ -203,7 +203,7 @@ mod tests {
         let (surface_path, boundary) =
             SurfacePath::line_from_points([[1., 1.], [2., 1.]]);
         let boundary = CurveBoundary::from(boundary);
-        let surface = core.layers.objects.surfaces.xz_plane().geometry();
+        let surface = core.layers.geometry.xz_plane();
 
         let tolerance = 1.;
         let approx = (&curve, surface_path, &surface, boundary)
@@ -274,7 +274,7 @@ mod tests {
         let surface_path =
             SurfacePath::circle_from_center_and_radius([0., 0.], 1.);
         let boundary = CurveBoundary::from([[0.], [TAU]]);
-        let surface = core.layers.objects.surfaces.xz_plane().geometry();
+        let surface = core.layers.geometry.xz_plane();
 
         let tolerance = 1.;
         let approx = (&curve, surface_path, &surface, boundary)

crates/fj-core/src/geometry/geometry.rs

@@ -11,33 +11,40 @@ use super::{GlobalPath, SurfaceGeometry};
 
 /// Geometric data that is associated with topological objects
 pub struct Geometry {
-    /// The geometry of surfaces
-    pub surface: BTreeMap<HandleWrapper<Surface>, SurfaceGeometry>,
+    surface: BTreeMap<HandleWrapper<Surface>, SurfaceGeometry>,
+
+    xy_plane: Handle<Surface>,
+    xz_plane: Handle<Surface>,
+    yz_plane: Handle<Surface>,
 }
 
 impl Geometry {
     /// Create a new instance of `Geometry`
     pub fn new(objects: &Objects) -> Self {
         let mut self_ = Self {
             surface: BTreeMap::new(),
+
+            xy_plane: objects.surfaces.xy_plane(),
+            xz_plane: objects.surfaces.xz_plane(),
+            yz_plane: objects.surfaces.yz_plane(),
         };
 
         self_.define_surface_inner(
-            objects.surfaces.xy_plane(),
+            self_.xy_plane.clone(),
             SurfaceGeometry {
                 u: GlobalPath::x_axis(),
                 v: Vector::unit_y(),
             },
         );
         self_.define_surface_inner(
-            objects.surfaces.xz_plane(),
+            self_.xz_plane.clone(),
             SurfaceGeometry {
                 u: GlobalPath::x_axis(),
                 v: Vector::unit_z(),
             },
         );
         self_.define_surface_inner(
-            objects.surfaces.yz_plane(),
+            self_.yz_plane.clone(),
             SurfaceGeometry {
                 u: GlobalPath::y_axis(),
                 v: Vector::unit_z(),
@@ -54,4 +61,31 @@ impl Geometry {
     ) {
         self.surface.insert(surface.clone().into(), geometry);
     }
+
+    /// # Access the geometry of the provided surface
+    ///
+    /// ## Panics
+    ///
+    /// Panics, if the geometry of surface is not defined.
+    pub fn of_surface(&self, surface: &Handle<Surface>) -> SurfaceGeometry {
+        self.surface
+            .get(&surface.clone().into())
+            .copied()
+            .expect("Expected geometry of surface to be defined")
+    }
+
+    /// Access the geometry of the xy-plane
+    pub fn xy_plane(&self) -> SurfaceGeometry {
+        self.of_surface(&self.xy_plane)
+    }
+
+    /// Access the geometry of the xz-plane
+    pub fn xz_plane(&self) -> SurfaceGeometry {
+        self.of_surface(&self.xz_plane)
+    }
+
+    /// Access the geometry of the yz-plane
+    pub fn yz_plane(&self) -> SurfaceGeometry {
+        self.of_surface(&self.yz_plane)
+    }
 }

crates/fj-core/src/objects/any_object.rs

@@ -36,8 +36,8 @@ macro_rules! any_object {
 
             /// Validate the object with a pre-defined validation configuration
             pub fn validate(&self,
-                    config: &ValidationConfig,
-                    errors: &mut Vec<ValidationError>
+                config: &ValidationConfig,
+                errors: &mut Vec<ValidationError>,
             ) {
                 match self {
                     $(