1 files changed, 43 insertions, 0 deletions
diff --git a/stockton-levels/src/parts/faces.rs b/stockton-levels/src/parts/faces.rs
new file mode 100644
index 0000000..0168cd8
--- /dev/null
+++ b/stockton-levels/src/parts/faces.rs
@@ -0,0 +1,43 @@
+use super::{textures::TextureRef, vertices::Vertex};
+use serde::{Deserialize, Serialize};
+
+pub type FaceRef = u32;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum Geometry {
+    Vertices(Vertex, Vertex, Vertex),
+}
+
+pub trait IsFace<C: HasFaces + ?Sized> {
+    fn index(&self, container: &C) -> FaceRef;
+    fn geometry(&self, container: &C) -> Geometry;
+    fn texture_idx(&self, container: &C) -> TextureRef;
+}
+
+pub trait HasFaces {
+    type Face: IsFace<Self>;
+
+    fn get_face(&self, index: FaceRef) -> Option<&Self::Face>;
+    fn iter_faces(&self) -> Faces<Self> {
+        Faces {
+            next: 0,
+            container: self,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+pub struct Faces<'a, T: HasFaces + ?Sized> {
+    next: FaceRef,
+    container: &'a T,
+}
+
+impl<'a, T: HasFaces> Iterator for Faces<'a, T> {
+    type Item = &'a T::Face;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let res = self.container.get_face(self.next);
+        self.next += 1;
+        res
+    }
+}