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-rw-r--r--src/geometry/polyhedron_feature3d.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/geometry/polyhedron_feature3d.rs b/src/geometry/polyhedron_feature3d.rs
index 5a86ef2..83088fe 100644
--- a/src/geometry/polyhedron_feature3d.rs
+++ b/src/geometry/polyhedron_feature3d.rs
@@ -40,6 +40,8 @@ impl From<Triangle> for PolyhedronFace {
impl From<Segment<f32>> for PolyhedronFace {
fn from(seg: Segment<f32>) -> Self {
+ // Vertices have feature ids 0 and 2.
+ // The segment interior has feature id 1.
Self {
vertices: [seg.a, seg.b, seg.b, seg.b],
vids: [0, 2, 2, 2],