From 61bc5afd393a59d3650a475f5310d92e04412022 Mon Sep 17 00:00:00 2001
From: Hanno Braun <hanno@braun-odw.eu>
Date: Fri, 9 Sep 2022 15:30:05 +0200
Subject: [PATCH 1/3] Add `Faces::find`

---
 crates/fj-kernel/src/objects/face.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/crates/fj-kernel/src/objects/face.rs b/crates/fj-kernel/src/objects/face.rs
index 4ff8d86fd..0bedae194 100644
--- a/crates/fj-kernel/src/objects/face.rs
+++ b/crates/fj-kernel/src/objects/face.rs
@@ -18,6 +18,17 @@ impl Faces {
     pub fn new() -> Self {
         Self::default()
     }
+
+    /// Find the given face
+    pub fn find(&self, face: &Face) -> Option<Face> {
+        for f in self {
+            if f == face {
+                return Some(f.clone());
+            }
+        }
+
+        None
+    }
 }
 
 impl Extend<Face> for Faces {

From 2453730f7c73f766093e9a739a94e6fd4d73506b Mon Sep 17 00:00:00 2001
From: Hanno Braun <hanno@braun-odw.eu>
Date: Fri, 9 Sep 2022 15:30:31 +0200
Subject: [PATCH 2/3] Add `Shell::find_face`

---
 crates/fj-kernel/src/objects/shell.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/crates/fj-kernel/src/objects/shell.rs b/crates/fj-kernel/src/objects/shell.rs
index eff78abf5..adf917335 100644
--- a/crates/fj-kernel/src/objects/shell.rs
+++ b/crates/fj-kernel/src/objects/shell.rs
@@ -47,6 +47,11 @@ impl Shell {
     pub fn into_faces(self) -> Faces {
         self.faces
     }
+
+    /// Find the given face in this shell
+    pub fn find_face(&self, face: &Face) -> Option<Face> {
+        self.faces().find(face)
+    }
 }
 
 impl Default for Shell {

From 05aa620e85b694a7e16b2c746dcfdc41bed092dd Mon Sep 17 00:00:00 2001
From: Hanno Braun <hanno@braun-odw.eu>
Date: Fri, 9 Sep 2022 15:30:49 +0200
Subject: [PATCH 3/3] Add `Solid::find_face`

---
 crates/fj-kernel/src/objects/solid.rs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/crates/fj-kernel/src/objects/solid.rs b/crates/fj-kernel/src/objects/solid.rs
index 18558937b..e5b2f0e86 100644
--- a/crates/fj-kernel/src/objects/solid.rs
+++ b/crates/fj-kernel/src/objects/solid.rs
@@ -2,7 +2,7 @@ use std::collections::BTreeSet;
 
 use crate::builder::SolidBuilder;
 
-use super::Shell;
+use super::{Face, Shell};
 
 /// A 3-dimensional shape
 ///
@@ -49,6 +49,17 @@ impl Solid {
     pub fn into_shells(self) -> impl Iterator<Item = Shell> {
         self.shells.into_iter()
     }
+
+    /// Find the given face in this solid
+    pub fn find_face(&self, face: &Face) -> Option<Face> {
+        for shell in self.shells() {
+            if let Some(face) = shell.find_face(face) {
+                return Some(face);
+            }
+        }
+
+        None
+    }
 }
 
 impl Default for Solid {