[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [35008] trunk/blender/release/scripts/ modules/bpy_types.py: bug [#26089] editbone.transfrom() seems to mess up bone roll (by more than float precision error)

[Campbell Barton]

Revision: 35008
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=35008
Author:   campbellbarton
Date:     2011-02-21 01:29:35 +0000 (Mon, 21 Feb 2011)
Log Message:
-----------
bug [#26089] editbone.transfrom() seems to mess up bone roll (by more than float precision error)
This is intentional behavior but add options not to transform the bones scale & roll.

Modified Paths:
--------------
    trunk/blender/release/scripts/modules/bpy_types.py

Modified: trunk/blender/release/scripts/modules/bpy_types.py
===================================================================
--- trunk/blender/release/scripts/modules/bpy_types.py	2011-02-21 01:02:30 UTC (rev 35007)
+++ trunk/blender/release/scripts/modules/bpy_types.py	2011-02-21 01:29:35 UTC (rev 35008)
@@ -278,21 +278,31 @@
         self.tail = self.head + vec
         self.roll = other.roll
 
-    def transform(self, matrix):
+    def transform(self, matrix, scale=True, roll=True):
         """
         Transform the the bones head, tail, roll and envalope (when the matrix has a scale component).
-        Expects a 4x4 or 3x3 matrix.
+
+        :arg matrix: 3x3 or 4x4 transformation matrix.
+        :type matrix: :class:`Matrix`
+        :arg scale: Scale the bone envalope by the matrix.
+        :type scale: bool
+        :arg roll: Correct the roll to point in the same relative direction to the head and tail.
+        :type roll: bool
         """
         from mathutils import Vector
         z_vec = Vector((0.0, 0.0, 1.0)) * self.matrix.to_3x3()
         self.tail = self.tail * matrix
         self.head = self.head * matrix
-        scalar = matrix.median_scale
-        self.head_radius *= scalar
-        self.tail_radius *= scalar
-        self.align_roll(z_vec * matrix)
 
+        if scale:
+            scalar = matrix.median_scale
+            self.head_radius *= scalar
+            self.tail_radius *= scalar
 
+        if roll:
+            self.align_roll(z_vec * matrix)
+
+
 def ord_ind(i1, i2):
     if i1 < i2:
         return i1, i2