Sweep Faces and Wires along a path (#155)

* Start binding to BRepOffsetAPI_MakePipeShell

* get wire sweep working

* use the simpler MakePipe instead of MakePipeShell

* remove unnecessary include

* fix clippy warnings

* clang format

* Update crates/opencascade/src/primitives/wire.rs

Co-authored-by: Brian Schwind <[email protected]>

---------

Co-authored-by: Brian Schwind <[email protected]>

crates/opencascade-sys/include/wrapper.hxx

@@ -22,6 +22,7 @@
 #include <BRepLib_ToolTriangulatedShape.hxx>
 #include <BRepMesh_IncrementalMesh.hxx>
 #include <BRepOffsetAPI_MakeOffset.hxx>
+#include <BRepOffsetAPI_MakePipe.hxx>
 #include <BRepOffsetAPI_MakeThickSolid.hxx>
 #include <BRepOffsetAPI_ThruSections.hxx>
 #include <BRepPrimAPI_MakeBox.hxx>

crates/opencascade-sys/src/lib.rs

@@ -765,6 +765,17 @@ pub mod ffi {
         );
         pub fn IsDone(self: &BRepOffsetAPI_MakeThickSolid) -> bool;
 
+        // Sweeps
+        type BRepOffsetAPI_MakePipe;
+
+        #[cxx_name = "construct_unique"]
+        pub fn BRepOffsetAPI_MakePipe_ctor(
+            spine: &TopoDS_Wire,
+            profile: &TopoDS_Shape,
+        ) -> UniquePtr<BRepOffsetAPI_MakePipe>;
+
+        pub fn Shape(self: Pin<&mut BRepOffsetAPI_MakePipe>) -> &TopoDS_Shape;
+
         // Lofting
         type BRepOffsetAPI_ThruSections;
 

crates/opencascade/src/primitives/face.rs

@@ -201,6 +201,18 @@ impl Face {
         wire.to_face()
     }
 
+    /// Sweep the face along a path to produce a solid
+    #[must_use]
+    pub fn sweep_along(&self, path: &Wire) -> Solid {
+        let profile_shape = ffi::cast_face_to_shape(&self.inner);
+        let mut make_pipe = ffi::BRepOffsetAPI_MakePipe_ctor(&path.inner, profile_shape);
+
+        let pipe_shape = make_pipe.pin_mut().Shape();
+        let result_solid = ffi::TopoDS_cast_to_solid(pipe_shape);
+
+        Solid::from_solid(result_solid)
+    }
+
     pub fn edges(&self) -> EdgeIterator {
         let explorer = ffi::TopExp_Explorer_ctor(
             ffi::cast_face_to_shape(&self.inner),

crates/opencascade/src/primitives/wire.rs

@@ -9,6 +9,8 @@ use cxx::UniquePtr;
 use glam::{dvec3, DVec3};
 use opencascade_sys::ffi;
 
+use crate::primitives::Shell;
+
 pub struct Wire {
     pub(crate) inner: UniquePtr<ffi::TopoDS_Wire>,
 }
@@ -188,6 +190,18 @@ impl Wire {
         Self::from_wire(result_wire)
     }
 
+    /// Sweep the wire along a path to produce a shell
+    #[must_use]
+    pub fn sweep_along(&self, path: &Wire) -> Shell {
+        let profile_shape = ffi::cast_wire_to_shape(&self.inner);
+        let mut make_pipe = ffi::BRepOffsetAPI_MakePipe_ctor(&path.inner, profile_shape);
+
+        let pipe_shape = make_pipe.pin_mut().Shape();
+        let result_shell = ffi::TopoDS_cast_to_shell(pipe_shape);
+
+        Shell::from_shell(result_shell)
+    }
+
     #[must_use]
     pub fn translate(&self, offset: DVec3) -> Self {
         self.transform(offset, dvec3(1.0, 0.0, 0.0), 0.degrees())

crates/viewer/src/main.rs

@@ -63,6 +63,8 @@ enum Example {
     Keycap,
     Offset2d,
     RoundedChamfer,
+    SweptFace,
+    SweptWire,
     TurnersCube,
     VariableFillet,
 }
@@ -79,6 +81,8 @@ impl Example {
             Example::Keycap => examples::keycap::shape(),
             Example::Offset2d => examples::offset_2d::shape(),
             Example::RoundedChamfer => examples::rounded_chamfer::shape(),
+            Example::SweptFace => examples::swept_face::shape(),
+            Example::SweptWire => examples::swept_wire::shape(),
             Example::TurnersCube => examples::turners_cube::shape(),
             Example::VariableFillet => examples::variable_fillet::shape(),
         }

examples/src/lib.rs

@@ -7,5 +7,7 @@ pub mod keyboard_case;
 pub mod keycap;
 pub mod offset_2d;
 pub mod rounded_chamfer;
+pub mod swept_face;
+pub mod swept_wire;
 pub mod turners_cube;
 pub mod variable_fillet;

examples/src/swept_face.rs

@@ -0,0 +1,23 @@
+use glam::DVec3;
+use opencascade::{
+    angle::{RVec, ToAngle},
+    primitives::{Face, IntoShape, Shape, Solid, Wire},
+    workplane::Workplane,
+};
+
+pub fn shape() -> Shape {
+    let r = 10.0;
+    let a = 5.0;
+
+    let face_profile: Face = Workplane::xz()
+        .rotated(RVec::z(45.0.degrees()))
+        .translated(DVec3::new(-r, 0.0, 0.0))
+        .rect(a, a)
+        .to_face();
+
+    let path: Wire = Workplane::xy().sketch().arc((-r, 0.0), (0.0, r), (r, 0.0)).wire();
+
+    let pipe_solid: Solid = face_profile.sweep_along(&path);
+
+    pipe_solid.into_shape()
+}

examples/src/swept_wire.rs

@@ -0,0 +1,22 @@
+use glam::DVec3;
+use opencascade::{
+    angle::{RVec, ToAngle},
+    primitives::{IntoShape, Shape, Shell, Wire},
+    workplane::Workplane,
+};
+
+pub fn shape() -> Shape {
+    let r = 10.0;
+    let a = 5.0;
+
+    let wire_profile: Wire = Workplane::xz()
+        .rotated(RVec::z(45.0.degrees()))
+        .translated(DVec3::new(-r, 0.0, 0.0))
+        .rect(a, a);
+
+    let path: Wire = Workplane::xy().sketch().arc((-r, 0.0), (0.0, r), (r, 0.0)).wire();
+
+    let pipe_shell: Shell = wire_profile.sweep_along(&path);
+
+    pipe_shell.into_shape()
+}