[Bf-extensions-cvs] SVN commit: /data/svn/bf-extensions [3583] trunk/py/scripts/addons/ object_fracture_cell: minor improvement to cell fracture algo.

[Campbell Barton]

Revision: 3583
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-extensions&revision=3583
Author:   campbellbarton
Date:     2012-07-05 07:54:56 +0000 (Thu, 05 Jul 2012)
Log Message:
-----------
minor improvement to cell fracture algo.

Modified Paths:
--------------
    trunk/py/scripts/addons/object_fracture_cell/__init__.py
    trunk/py/scripts/addons/object_fracture_cell/fracture_cell_calc.py

Modified: trunk/py/scripts/addons/object_fracture_cell/__init__.py
===================================================================
--- trunk/py/scripts/addons/object_fracture_cell/__init__.py	2012-07-05 01:23:57 UTC (rev 3582)
+++ trunk/py/scripts/addons/object_fracture_cell/__init__.py	2012-07-05 07:54:56 UTC (rev 3583)
@@ -24,10 +24,10 @@
     "location": "Search > Fracture Object & Add -> Fracture Helper Objects",
     "description": "Fractured Object, Bomb, Projectile, Recorder",
     "warning": "",
-    "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.6/Py/"\
-        "Scripts/Object/Fracture",
-    "tracker_url": "https://projects.blender.org/tracker/index.php?"\
-        "func=detail&aid=21793",
+    "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.6/Py/"
+                "Scripts/Object/Fracture",
+    "tracker_url": "https://projects.blender.org/tracker/index.php?"
+                   "func=detail&aid=21793",
     "category": "Object"}
 
 

Modified: trunk/py/scripts/addons/object_fracture_cell/fracture_cell_calc.py
===================================================================
--- trunk/py/scripts/addons/object_fracture_cell/fracture_cell_calc.py	2012-07-05 01:23:57 UTC (rev 3582)
+++ trunk/py/scripts/addons/object_fracture_cell/fracture_cell_calc.py	2012-07-05 07:54:56 UTC (rev 3583)
@@ -24,6 +24,7 @@
 def points_as_bmesh_cells(verts, points,
                           margin_bounds=0.05,
                           margin_cell=0.0):
+    from math import sqrt
     import mathutils
     from mathutils import Vector
 
@@ -79,11 +80,14 @@
             if len(plane_indices) != len(planes):
                 planes[:] = [planes[k] for k in plane_indices]
 
-            distance_max = vertices[0].length
-            for k in range(1, len(vertices)):
-                distance = vertices[k].length
+            # for comparisons use length_squared and delay
+            # converting to a real length until the end.
+            distance_max = 10000000000.0  # a big value!
+            for v in vertices:
+                distance = v.length_squared
                 if distance_max < distance:
                     distance_max = distance
+            distance_max = sqrt(distance_max)  # make real length
             distance_max *= 2.0
 
         if len(vertices) == 0: