将 Wavefront .obj 转换为 .off

Question

如何转换 Wavefront's .obj file to a .off file？

Answer 1

您可以使用开源 GUI 软件 Meshlab。

File > Import Mesh (Ctrl-I)
File > Export Mesh As 并选择 "Object file format (.off)"

Answer 2

您可以使用 CLI，闭源，仅限二进制文件，meshconv

chmod u+x meshconv
./meshconv input.obj -c off -o output.off

但是结果似乎与我使用 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 this one）。

Answer 3

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"

将 Wavefront .obj 转换为 .off

Convert Wavefront .obj to .off

geometry

file-format

file-conversion

wavefront