helixish: try_s and try_t now always >= 0

Since we add tau if necessary

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

diff --git a/helixish.py b/helixish.py
index bf8083fbd35dcc137f044027461e59bd0610003a..c3a1797254d485bb86c71ae16ea1603605365822 100644 (file)
--- a/helixish.py
+++ b/helixish.py
@@ -169,8 +169,6 @@ class HelixishCurve():
         try_s = railway_ST(railway_CP, [0,0], railway_midpt, railway_r)
         try_t = railway_ST(railway_CP, railway_midpt, q_plane[0:2], railway_r)
         dbg('try_s, _t', try_s, try_t)
-        if try_s < 0 or try_t < 0:
-          continue
 
         try_st = try_s + try_t
         if best_st is None or try_st < best_st: