From f215f27f9f5f9b38b2a29cce72cefe70b426d6af Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Thu, 2 May 2019 10:22:31 +0800
Subject: [PATCH] always to a vect

---
 src/m_translation.scad | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/src/m_translation.scad b/src/m_translation.scad
index 23dfdc7d..5a199a72 100644
--- a/src/m_translation.scad
+++ b/src/m_translation.scad
@@ -1,6 +1,15 @@
-function m_translation(v) = [
-    [1, 0, 0, v[0]],
-    [0, 1, 0, v[1]],
-    [0, 0, 1, v[2]],
-    [0, 0, 0, 1]
-];
\ No newline at end of file
+function _to_vect(v) =
+     len(v) == 3 ? v : (
+         len(v) == 2 ? [v[0], v[1], 0] : (
+             len(v) == 1 ? [v[0], 0, 0] : [v, 0, 0]
+         ) 
+     );
+
+function m_translation(v) = 
+    let(vt = _to_vect(v))
+    [
+        [1, 0, 0, vt[0]],
+        [0, 1, 0, vt[1]],
+        [0, 0, 1, vt[2]],
+        [0, 0, 0, 1]
+    ];
\ No newline at end of file