helixish: dist_pq_plane should be the distance in the dp/dq plane

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/helixish.py b/helixish.py
index eb2e0c923df3b6ec9925ad073687e5aac81b9b7e..a4598e1c6747a2edb567613b4389986e37381da0 100644 (file)
--- a/helixish.py
+++ b/helixish.py
@@ -72,7 +72,7 @@ class HelixishCurve():
     dp_plane = augmatmultiply(dPQplane_into, dp, augwith=0)
     dq_plane = augmatmultiply(dPQplane_into, dq, augwith=0)
     q_plane  = augmatmultiply(dPQplane_into, q)
-    dist_pq_plane = np.linalg.norm(q_plane)
+    dist_pq_plane = np.linalg.norm(q_plane[0:2])
 
     vdbg_plane = MatrixVisdebug(vdbg(), dPQplane_basis)