Add convenient syntax for fj::Difference2d

fj/src/lib.rs

@@ -16,7 +16,8 @@ mod syntax;
 
 pub mod prelude {
  pub use crate::syntax::{
- Group as _, Rotate as _, Sketch as _, Sweep as _, Translate as _,
+ Difference as _, Group as _, Rotate as _, Sketch as _, Sweep as _,
+ Translate as _,
  };
 }
 

fj/src/syntax.rs

@@ -1,3 +1,45 @@
+pub trait Difference {
+ fn difference<Other>(&self, other: &Other) -> crate::Difference2d
+ where
+ Other: Clone + Into<crate::Shape2d>;
+}
+
+impl<T> Difference for T
+where
+ T: Clone + Into<crate::Shape2d>,
+{
+ fn difference<Other>(&self, other: &Other) -> crate::Difference2d
+ where
+ Other: Clone + Into<crate::Shape2d>,
+ {
+ let a = self.clone().into();
+ let b = other.clone().into();
+
+ crate::Difference2d::from_objects(a, b)
+ }
+}
+
+pub trait Group {
+ fn group<Other>(&self, other: &Other) -> crate::Group
+ where
+ Other: Clone + Into<crate::Shape3d>;
+}
+
+impl<T> Group for T
+where
+ T: Clone + Into<crate::Shape3d>,
+{
+ fn group<Other>(&self, other: &Other) -> crate::Group
+ where
+ Other: Clone + Into<crate::Shape3d>,
+ {
+ let a = self.clone().into();
+ let b = other.clone().into();
+
+ crate::Group { a, b }
+ }
+}
+
 pub trait Rotate {
  /// Create a rotation
  ///
@@ -69,24 +111,3 @@ where
  }
  }
 }
-
-pub trait Group {
- fn group<Other>(&self, other: &Other) -> crate::Group
- where
- Other: Clone + Into<crate::Shape3d>;
-}
-
-impl<T> Group for T
-where
- T: Clone + Into<crate::Shape3d>,
-{
- fn group<Other>(&self, other: &Other) -> crate::Group
- where
- Other: Clone + Into<crate::Shape3d>,
- {
- let a = self.clone().into();
- let b = other.clone().into();
-
- crate::Group { a, b }
- }
-}

models/spacer/src/lib.rs

@@ -1,5 +1,7 @@
 use std::collections::HashMap;
 
+use fj::prelude::*;
+
 #[no_mangle]
 pub extern "C" fn model(args: &HashMap<String, String>) -> fj::Shape {
  let outer = args
@@ -22,10 +24,8 @@ pub extern "C" fn model(args: &HashMap<String, String>) -> fj::Shape {
  fj::Circle::from_radius(outer).with_color([0, 0, 255, 255]);
  let inner_edge = fj::Circle::from_radius(inner);
 
- let footprint =
- fj::Difference2d::from_objects(outer_edge.into(), inner_edge.into());
-
- let spacer = fj::Sweep::from_shape_and_length(footprint.into(), height);
+ let footprint = outer_edge.difference(&inner_edge);
+ let spacer = footprint.sweep(height);
 
  spacer.into()
 }