Geometry 将波阵面.obj转换为.off

如何将文件转换为文件？

您可以使用开源GUI软件

• 文件

  导入网格

  （Ctrl-I）

• 文件

  将网格导出为

  并选择“对象文件格式（.off）”

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您可以使用CLI、封闭源代码、仅二进制、

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然而，结果似乎与我使用Meshlab得到的答案有点不同，因为我无法在CGAL中加载生成的.off文件（错误看起来像）。

这应该适用于三角形网格

def conv_obj(file):
    x = open(file)    
    k = 0
    while "\n" in x.readline():
        k += 1
    x = open(file)
    out = str()
    v = 0
    f = 0
    for i in range(k) :
        y = x.readline().split()
        if len(y) > 0 and y[0] == "v" :
            v += 1
            out += str(y[1]) + " " + str(y[2]) + " " + str(y[3]) + "\n"
        if len(y) > 0 and y[0] == "f" :
            f += 1
            out += "3 " + str(int(y[1])-1) + " " + str(int(y[2])-1) + " " + str(int(y[3])-1) + "\n"
    out1 = "OFF\n" + str(v) + " " + str(f) + " " + "0" + "\n" + out
    w = open(file.strip("obj") + "off", "w")
    w.write(out1)
    w.close()
    x.close()
    return "done"

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如果您更喜欢命令行，则meshlab与命令行版本（meshlab服务器）捆绑在一起，该版本可以在CLI上执行相同的操作：

meshlab服务器-i input.obj-o output.off

（最终还可以通过指定脚本文件来执行一些筛选…）

def conv_obj(file):
    x = open(file)    
    k = 0
    while "\n" in x.readline():
        k += 1
    x = open(file)
    out = str()
    v = 0
    f = 0
    for i in range(k) :
        y = x.readline().split()
        if len(y) > 0 and y[0] == "v" :
            v += 1
            out += str(y[1]) + " " + str(y[2]) + " " + str(y[3]) + "\n"
        if len(y) > 0 and y[0] == "f" :
            f += 1
            out += "3 " + str(int(y[1])-1) + " " + str(int(y[2])-1) + " " + str(int(y[3])-1) + "\n"
    out1 = "OFF\n" + str(v) + " " + str(f) + " " + "0" + "\n" + out
    w = open(file.strip("obj") + "off", "w")
    w.write(out1)
    w.close()
    x.close()
    return "done"