From bbd23db44df965bccbe7f8fd87398d65020d54c9 Mon Sep 17 00:00:00 2001
From: SE2Dev <brokensilencedev@gmail.com>
Date: Sun, 2 Apr 2017 18:24:33 -0400
Subject: [PATCH] Add Support for Normalizing Bone Weights

---
 xmodel.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/xmodel.py b/xmodel.py
index 85591b8..538385c 100644
--- a/xmodel.py
+++ b/xmodel.py
@@ -1,5 +1,6 @@
 from itertools import repeat
 from time import strftime
+from math import sqrt
 
 
 def __clamp_float__(value, range=(-1.0, 1.0)):
@@ -10,6 +11,11 @@ def __clamp_multi__(value, range=(-1.0, 1.0)):
     return tuple([max(min(v, range[1]), range[0]) for v in value])
 
 
+def __normalized__(iterable):
+    d = 1.0 / sqrt(sum([v * v for v in iterable]))
+    return [v * d for v in iterable]
+
+
 def deserialize_image_string(ref_string):
     if len(ref_string) == 0:
         return {"color": "$none.tga"}
@@ -600,6 +606,14 @@ def __load_materials__(self, file, version):
 
         return lines_read
 
+    def normalize_weights(self):
+        """
+        Normalize the bone weights for all verts (in all meshes)
+        """
+        for mesh in self.meshes:
+            for vert in mesh.verts:
+                vert.weights = __normalized__(vert.weights)
+
     def LoadFile(self, path, split_meshes=True):
         file = open(path, "r")
         # file automatically keeps track of what line its on across calls