MD2顶点法线存储概述

Skyman MD2文件里存储了模型各顶点的法线的索引（byte lightNormalIndex），用这个索引来从法线表中取得该法线，该法线表在utils3/qdata目录下的anorms.h文件中，如下所示：
{-0.525731, 0.000000, 0.850651},
{-0.442863, 0.238856, 0.864188},
{-0.295242, 0.000000, 0.955423},
{-0.309017, 0.500000, 0.809017},
{-0.162460, 0.262866, 0.951056},
{0.000000, 0.000000, 1.000000},
{0.000000, 0.850651, 0.525731},
{-0.147621, 0.716567, 0.681718},
{0.147621, 0.716567, 0.681718},
{0.000000, 0.525731, 0.850651},
{0.309017, 0.500000, 0.809017},
{0.525731, 0.000000, 0.850651},
{0.295242, 0.000000, 0.955423},
{0.442863, 0.238856, 0.864188},
{0.162460, 0.262866, 0.951056},
{-0.681718, 0.147621, 0.716567},
{-0.809017, 0.309017, 0.500000},
{-0.587785, 0.425325, 0.688191},
{-0.850651, 0.525731, 0.000000},
{-0.864188, 0.442863, 0.238856},
{-0.716567, 0.681718, 0.147621},
{-0.688191, 0.587785, 0.425325},
{-0.500000, 0.809017, 0.309017},
{-0.238856, 0.864188, 0.442863},
{-0.425325, 0.688191, 0.587785},
{-0.716567, 0.681718, -0.147621},
{-0.500000, 0.809017, -0.309017},
{-0.525731, 0.850651, 0.000000},
{0.000000, 0.850651, -0.525731},
{-0.238856, 0.864188, -0.442863},
{0.000000, 0.955423, -0.295242},
{-0.262866, 0.951056, -0.162460},
{0.000000, 1.000000, 0.000000},
{0.000000, 0.955423, 0.295242},
{-0.262866, 0.951056, 0.162460},
{0.238856, 0.864188, 0.442863},
{0.262866, 0.951056, 0.162460},
{0.500000, 0.809017, 0.309017},
{0.238856, 0.864188, -0.442863},
{0.262866, 0.951056, -0.162460},
{0.500000, 0.809017, -0.309017},
{0.850651, 0.525731, 0.000000},
{0.716567, 0.681718, 0.147621},
{0.716567, 0.681718, -0.147621},
{0.525731, 0.850651, 0.000000},
{0.425325, 0.688191, 0.587785},
{0.864188, 0.442863, 0.238856},
{0.688191, 0.587785, 0.425325},
{0.809017, 0.309017, 0.500000},
{0.681718, 0.147621, 0.716567},
{0.587785, 0.425325, 0.688191},
{0.955423, 0.295242, 0.000000},
{1.000000, 0.000000, 0.000000},
{0.951056, 0.162460, 0.262866},
{0.850651, -0.525731, 0.000000},
{0.955423, -0.295242, 0.000000},
{0.864188, -0.442863, 0.238856},
{0.951056, -0.162460, 0.262866},
{0.809017, -0.309017, 0.500000},
{0.681718, -0.147621, 0.716567},
{0.850651, 0.000000, 0.525731},
{0.864188, 0.442863, -0.238856},
{0.809017, 0.309017, -0.500000},
{0.951056, 0.162460, -0.262866},
{0.525731, 0.000000, -0.850651},
{0.681718, 0.147621, -0.716567},
{0.681718, -0.147621, -0.716567},
{0.850651, 0.000000, -0.525731},
{0.809017, -0.309017, -0.500000},
{0.864188, -0.442863, -0.238856},
{0.951056, -0.162460, -0.262866},
{0.147621, 0.716567, -0.681718},
{0.309017, 0.500000, -0.809017},
{0.425325, 0.688191, -0.587785},
{0.442863, 0.238856, -0.864188},
{0.587785, 0.425325, -0.688191},
{0.688191, 0.587785, -0.425325},
{-0.147621, 0.716567, -0.681718},
{-0.309017, 0.500000, -0.809017},
{0.000000, 0.525731, -0.850651},
{-0.525731, 0.000000, -0.850651},
{-0.442863, 0.238856, -0.864188},
{-0.295242, 0.000000, -0.955423},
{-0.162460, 0.262866, -0.951056},
{0.000000, 0.000000, -1.000000},
{0.295242, 0.000000, -0.955423},
{0.162460, 0.262866, -0.951056},
{-0.442863, -0.238856, -0.864188},
{-0.309017, -0.500000, -0.809017},
{-0.162460, -0.262866, -0.951056},
{0.000000, -0.850651, -0.525731},
{-0.147621, -0.716567, -0.681718},
{0.147621, -0.716567, -0.681718},
{0.000000, -0.525731, -0.850651},
{0.309017, -0.500000, -0.809017},
{0.442863, -0.238856, -0.864188},
{0.162460, -0.262866, -0.951056},
{0.238856, -0.864188, -0.442863},
{0.500000, -0.809017, -0.309017},
{0.425325, -0.688191, -0.587785},
{0.716567, -0.681718, -0.147621},
{0.688191, -0.587785, -0.425325},
{0.587785, -0.425325, -0.688191},
{0.000000, -0.955423, -0.295242},
{0.000000, -1.000000, 0.000000},
{0.262866, -0.951056, -0.162460},
{0.000000, -0.850651, 0.525731},
{0.000000, -0.955423, 0.295242},
{0.238856, -0.864188, 0.442863},
{0.262866, -0.951056, 0.162460},
{0.500000, -0.809017, 0.309017},
{0.716567, -0.681718, 0.147621},
{0.525731, -0.850651, 0.000000},
{-0.238856, -0.864188, -0.442863},
{-0.500000, -0.809017, -0.309017},
{-0.262866, -0.951056, -0.162460},
{-0.850651, -0.525731, 0.000000},
{-0.716567, -0.681718, -0.147621},
{-0.716567, -0.681718, 0.147621},
{-0.525731, -0.850651, 0.000000},
{-0.500000, -0.809017, 0.309017},
{-0.238856, -0.864188, 0.442863},
{-0.262866, -0.951056, 0.162460},
{-0.864188, -0.442863, 0.238856},
{-0.809017, -0.309017, 0.500000},
{-0.688191, -0.587785, 0.425325},
{-0.681718, -0.147621, 0.716567},
{-0.442863, -0.238856, 0.864188},
{-0.587785, -0.425325, 0.688191},
{-0.309017, -0.500000, 0.809017},
{-0.147621, -0.716567, 0.681718},
{-0.425325, -0.688191, 0.587785},
{-0.162460, -0.262866, 0.951056},
{0.442863, -0.238856, 0.864188},
{0.162460, -0.262866, 0.951056},
{0.309017, -0.500000, 0.809017},
{0.147621, -0.716567, 0.681718},
{0.000000, -0.525731, 0.850651},
{0.425325, -0.688191, 0.587785},
{0.587785, -0.425325, 0.688191},
{0.688191, -0.587785, 0.425325},
{-0.955423, 0.295242, 0.000000},
{-0.951056, 0.162460, 0.262866},
{-1.000000, 0.000000, 0.000000},
{-0.850651, 0.000000, 0.525731},
{-0.955423, -0.295242, 0.000000},
{-0.951056, -0.162460, 0.262866},
{-0.864188, 0.442863, -0.238856},
{-0.951056, 0.162460, -0.262866},
{-0.809017, 0.309017, -0.500000},
{-0.864188, -0.442863, -0.238856},
{-0.951056, -0.162460, -0.262866},
{-0.809017, -0.309017, -0.500000},
{-0.681718, 0.147621, -0.716567},
{-0.681718, -0.147621, -0.716567},
{-0.850651, 0.000000, -0.525731},
{-0.688191, 0.587785, -0.425325},
{-0.587785, 0.425325, -0.688191},
{-0.425325, 0.688191, -0.587785},
{-0.425325, -0.688191, -0.587785},
{-0.587785, -0.425325, -0.688191},
{-0.688191, -0.587785, -0.425325},

可以看出，这些法线向量都是经过单位化的。