Updated normalize function, uses sqrt. Old normalize is a

fast version.  Added more cases to unit test for vector.
So far found nothing wrong with the vec4 results..

Some minor accuracy isses with sqrt, but that is at the
0.00001 level..  should not cause much if any error..

rtrt/modules/vec4.h

@@ -150,8 +150,8 @@ struct vec4
                 "shufps $0xb1, %%xmm0, %%xmm0 \n\t" // b1 1011 0001 (2 3 0 1) xmm1 (zw, zw, xy, xy)
                 "addps %%xmm1, %%xmm0 \n\t"         // add xmm1 to xmm0 (xyzw, xyzw, xyzw, xyzw)
                 "sqrtps %%xmm0, %%xmm0 \n\t"        // take the sqrt of xmm0
-                "divps %%xmm2, %%xmm0 \n\t"         // divide
-                "movaps %%xmm0, %0 \n\t"
+                "divps %%xmm0, %%xmm2 \n\t"         // divide
+                "movaps %%xmm2, %0 \n\t"
                 : "=m"(*this)
                 : "m"(*this)
                 : "xmm0", "xmm1", "xmm2"

rtrt_test/rtrt_test.pro.user

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by Qt Creator 2.3.1, 2011-12-10T21:21:17. -->
+<!-- Written by Qt Creator 2.3.1, 2011-12-10T21:44:44. -->
 <qtcreator>
  <data>
   <variable>ProjectExplorer.Project.ActiveTarget</variable>
@@ -87,7 +87,7 @@
    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Desktop</value>
    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Desktop</value>
    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">Qt4ProjectManager.Target.DesktopTarget</value>
-   <value type="int" key="ProjectExplorer.Target.ActiveBuildConfiguration">0</value>
+   <value type="int" key="ProjectExplorer.Target.ActiveBuildConfiguration">1</value>
    <value type="int" key="ProjectExplorer.Target.ActiveDeployConfiguration">0</value>
    <value type="int" key="ProjectExplorer.Target.ActiveRunConfiguration">0</value>
    <valuemap type="QVariantMap" key="ProjectExplorer.Target.BuildConfiguration.0">