From 6c2a19366f6dfcbc78376d69636c4d3ff4f909e3 Mon Sep 17 00:00:00 2001
From: Ian Gulliver <flamingcow@gmail.com>
Date: Sat, 24 Dec 2016 22:43:33 -0700
Subject: [PATCH] Structure doc

---
 fcad.scad | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fcad.scad b/fcad.scad
index 825a40b..13aba4f 100644
--- a/fcad.scad
+++ b/fcad.scad
@@ -1,5 +1,11 @@
 fDraw(fCylinder(10, r1=5, r2=2));
 
+///// Data structures
+
+/// model:
+///   kKeyPoints "points" fPoints(): [ [x, y, z], ... ]
+///   kKeyFaces "faces" fFaces(): [ [ pointIdx, ... ], ... ]
+
 ///// Drawing modules
 module fDraw(model) {
   polyhedron(points=fPoints(model), faces=fFaces(model));