Scripts:

- Mirror bone weights contributed by Thomas Oppl.
- Softimage XSI exporter contributed by Elira (with updates by Mal
Duffin).

Again, thanks to the authors mentioned. And to Tom (LetterRip) for
contacting the authors and making suggestions about scripts we should
include.

release/scripts/mirror_bone_weights.py

@@ -0,0 +1,218 @@
+#!BPY
+"""
+Name: 'Mirror Bone Weights'
+Blender: 239
+Group: 'Mesh'
+Submenu: '-x to +x' nxtopx
+Submenu: '+x to -x' pxtonx
+Tooltip: 'Mirror vertex group influences of a model'
+"""
+
+__author__ = "Thomas Oppl"
+__version__ = "5.12"
+__url__ = "elysiun"
+__email__ = "scripts"
+__bpydoc__ = """\
+Description:
+
+This script copies vertex group influences from one half of a model to the
+other half of it.
+
+Usage:
+
+- Select the model<br>
+- Start the script (Object -> Scripts -> Mirror Bone Weights)<br>
+- Use the "-x to +x" or the "+x to -x" submenu depending on which side should
+  be the source and which the destination.<br>
+
+Notes:
+
+- The model has to be in the center of the world along the x-axis.<br>
+- The model has to be symmetrical along the x-axis.<br>
+- You have to use the ".R" and ".L" suffix naming scheme for your vertex groups.<br>
+
+"""
+
+#------------------------------------------------------------
+# Mirror Bone Weights - (c) 2005 thomas oppl - toppl@fh-sbg.ac.at
+#------------------------------------------------------------
+# ***** BEGIN GPL LICENSE BLOCK *****
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+# ***** END GPL LICENCE BLOCK *****
+#------------------------------------------------------------
+
+
+
+
+
+from Blender import NMesh, Object, Draw, sys, Types, Window
+
+
+
+
+
+threshold = 0.001
+
+################################################################################
+def mirror(mode):
+    print
+    print "mirror bone weights: %s" % (mode)
+    print "threshold:           %.6f" % (threshold)
+
+    objects = Object.GetSelected()
+    if not objects:
+        Draw.PupMenu("Error: no object selected!")
+        print "no object selected!"
+        return
+    mesh = objects[0].getData()
+    if type(mesh) != Types.NMeshType:
+        Draw.PupMenu("Error: object must be a mesh!")
+        print "object is no mesh!"
+        return
+    
+    # nmesh.getvertexinfluences function seems to be broken so i create a dictionary instead
+    Window.WaitCursor(1)
+    time = sys.time()
+    in_editmode = Window.EditMode()
+    if in_editmode: Window.EditMode(0)
+    vertexinfluences = {}
+    for i in range(len(mesh.verts)):
+        vertexinfluences[i] = []
+    for groupname in mesh.getVertGroupNames():
+        for vertex in mesh.getVertsFromGroup(groupname, 1):
+            index, weight = vertex[0], vertex[1]
+            vertexinfluences[index].append((groupname, weight))
+    influencestime = sys.time() - time
+    print "influence dictionary generated in %.6f seconds!" % (influencestime)
+
+    # generate binary tree to speed up looking for opposite vertex
+    time = sys.time()
+    tree = c_tree(mesh.verts)
+    treetime = sys.time() - time
+    print "binary tree generated in %.6f seconds!" % (treetime)
+
+    # mirror vertex group influences
+    time = sys.time()
+    if mode == "-x to +x":
+        verticeshalf = [v for v in mesh.verts if v.co[0] < 0]
+    else:
+        verticeshalf = [v for v in mesh.verts if v.co[0] > 0]
+    i = 0
+    for vertex in verticeshalf:
+        oppositeposition = (-vertex.co[0], vertex.co[1], vertex.co[2])
+        foundvertex = []
+        tree.findvertex(oppositeposition, foundvertex, threshold)
+        if foundvertex:
+            oppositevertex = foundvertex[0]
+            # remove all influences from opposite vertex
+            for influence in vertexinfluences[oppositevertex.index]:
+                mesh.removeVertsFromGroup(influence[0], [oppositevertex.index])
+            # copy influences to opposite vertex
+            for influence in vertexinfluences[vertex.index]:
+                name = influence[0]
+                if name[-2:] == ".R":
+                    name = name[:-2] + ".L"
+                elif name[-2:] == ".L":
+                    name = name[:-2] + ".R"
+                if name not in mesh.getVertGroupNames(): # create opposite group if it doesn't exist
+                    mesh.addVertGroup(name)            
+                mesh.assignVertsToGroup(name, [oppositevertex.index], influence[1], "add")
+            i += 1
+    mirrortime = sys.time() - time
+    print "%d vertices mirrored in %.6f seconds!" % (i, mirrortime)
+
+    # done!
+    print "done in %.6f seconds total!" % (influencestime + treetime + mirrortime)
+    if in_editmode: Window.EditMode(1)
+    Window.WaitCursor(0)
+
+
+
+
+################################################################################
+NODE_VERTEX_LIMIT = 50
+
+class c_boundingbox:
+    def __init__(self, vertices):
+        self.min_x = self.max_x = vertices[0].co[0]
+        self.min_y = self.max_y = vertices[0].co[1]
+        self.min_z = self.max_z = vertices[0].co[2]
+        for vertex in vertices:
+            self.min_x = min(self.min_x, vertex.co[0])
+            self.min_y = min(self.min_y, vertex.co[1])
+            self.min_z = min(self.min_z, vertex.co[2])
+            self.max_x = max(self.max_x, vertex.co[0])
+            self.max_y = max(self.max_y, vertex.co[1])
+            self.max_z = max(self.max_z, vertex.co[2])
+        self.dim_x = self.max_x - self.min_x
+        self.dim_y = self.max_y - self.min_y
+        self.dim_z = self.max_z - self.min_z
+        self.splitaxis = [self.dim_x, self.dim_y, self.dim_z].index(max(self.dim_x, self.dim_y, self.dim_z))
+        self.center_x = self.max_x - (self.dim_x / 2.0)
+        self.center_y = self.max_y - (self.dim_y / 2.0)
+        self.center_z = self.max_z - (self.dim_z / 2.0)
+        self.splitcenter = [self.center_x, self.center_y, self.center_z][self.splitaxis]
+    def __str__(self):
+        return "min: %.3f %.3f %.3f max: %.3f %.3f %.3f dim: %.3f %.3f %.3f" %\
+               (self.min_x, self.min_y, self.min_z,
+                self.max_x, self.max_y, self.max_z,
+                self.dim_x, self.dim_y, self.dim_z)
+    def isinside(self, position, threshold):
+        return (position[0] <= self.max_x + threshold and position[1] <= self.max_y + threshold and \
+                position[2] <= self.max_z + threshold and position[0] >= self.min_x - threshold and \
+                position[1] >= self.min_y - threshold and position[2] >= self.min_z - threshold)
+
+class c_tree:
+    def __init__(self, vertices, level = 0):
+        self.level = level
+        self.children = []
+        self.vertices = []
+        self.boundingbox = c_boundingbox(vertices)
+        splitaxis = self.boundingbox.splitaxis
+        splitcenter = self.boundingbox.splitcenter
+        if len(vertices) > NODE_VERTEX_LIMIT:
+            self.children.append(c_tree(
+                [v for v in vertices if v.co[splitaxis] > splitcenter], self.level + 1))
+            self.children.append(c_tree(
+                [v for v in vertices if v.co[splitaxis] <= splitcenter], self.level + 1))
+        else: # leaf node
+            self.vertices = vertices
+    def __str__(self):
+        s = "  " * self.level + "-node %d\n" % (len(self.vertices))
+        for child in self.children:
+            s += str(child)
+        return s
+    def findvertex(self, position, foundvertex, threshold):
+        if self.boundingbox.isinside(position, threshold):
+            if self.children:
+                for child in self.children:
+                    child.findvertex(position, foundvertex, threshold)
+            else: # node found
+                for vertex in self.vertices:
+                    v, p, t = vertex.co, position, threshold
+                    if abs(v[0] - p[0]) < t and abs(v[1] - p[1]) < t and abs(v[2] - p[2]) < t: # vertex found
+                        foundvertex.append(vertex)
+
+
+
+
+
+################################################################################
+if __script__["arg"] == "nxtopx":
+    mirror("-x to +x")
+if __script__["arg"] == "pxtonx":
+    mirror("+x to -x")