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[maxscript] 导出 vertex normal

2010-05-23 12:02:59| 分类： 3d_3dmax | 标签： |举报 |字号大中小订阅

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书接上回，我们继续来导出 vertex normal (法线)。

给我们的 box 增加个 Edit Normals Modifier。

[maxscript] 导出 vertex normal - kasicass - Code@Pig Home

选中某个 normal，然后通过“旋转“，改变其方向。

===========================================
OK，剩下的，上代码。

--------------------------- export_vertex_normal.ms -----------------------------

function export_one_triangle fp tri_index =
(
   tri_vertices = getFace $ tri_index -- only index
   tri_normals = meshop.getFaceRNormals $ tri_index

   format "triangle #%\n" tri_index to:fp
   for i = 1 to 3 do
   (
   v = getVert $ tri_vertices[i]
   n = tri_normals[i]
   format "v%: xyz(%,%,%) n(%,%,%)\n" i v[1] v[2] v[3] n[1] n[2] n[3] to:fp
   )
   format "\n" to:fp
)

filename = getSaveFileName types:"Data(*.dat)|*.dat|All|*.*|"
if filename != undefined then
(
   convertToMesh $
   fp = openFile filename mode:"wt"

   num = getNumFaces $ -- triangle num
   for i = 1 to num do
   (
   export_one_triangle fp i
   )

   fclose fp
)

---------------------------------------------------------------------------------------

triangle #1
v1: xyz(-10.0,-10.0,0.0) n(0.0,0.0,-1.0)
v2: xyz(-10.0,10.0,0.0) n(0.0,0.0,-1.0)
v3: xyz(10.0,10.0,0.0) n(0.0,0.0,-1.0)

triangle #2
v1: xyz(10.0,10.0,0.0) n(0.0,0.0,-1.0)
v2: xyz(10.0,-10.0,0.0) n(0.0,0.0,-1.0)
v3: xyz(-10.0,-10.0,0.0) n(0.0,0.0,-1.0)

---------------------------------------------------------------------------------------

关键就在?meshop.getFaceRNormals，取得 face render normals。

meshop 就相当于一个 namespace，包含着一些高级的操作函数。

还有个

getNormal <mesh> <vert_index_integer>

但不知道这样取出来的 normal 对应着啥？不解~~

另外，getFaceRNormals 获取的 normal 数值，并没有体现出 Edit Normals Modifier 的修改效果。不解 - -!

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