读取 obj 文件！ (指数)

Question

我想做的是读取faces(f)，但是他们有“/”我不知道如何去除？基本上我想要的是将面孔编号存储在一个临时变量中。我不知道如何在 C++ fstream 中做到这一点。

std::string text;
    std::istringstream iss(line);

    iss >> text;

    // Easy part!
    if (text == "v")
    {
        glm::vec3 currectPos;

        iss >> currectPos.x;
        iss >> currectPos.y;
        iss >> currectPos.z;

        filePos.push_back(currectPos);
    }
    if (text == "vt")
    {
        glm::vec2 currectUV;

        iss >> currectUV.x;
        iss >> currectUV.y;

        fileUV.push_back(currectUV);
    }
    if (text == "vn")
    {
        glm::vec3 currectNorm;

        iss >> currectNorm.x;
        iss >> currectNorm.y;
        iss >> currectNorm.z;

        fileNorm.push_back(currectNorm);
    }


    // Last part, hard part!
    if (text == "f")
    {
        // Face!!! :O
        // This one here I am having trouble with
        // How do I read it?
    }

v -1.000000 -1.000000 1.000000
v -1.000000 1.000000 1.000000
v -1.000000 -1.000000 -1.000000
v -1.000000 1.000000 -1.000000
v 1.000000 -1.000000 1.000000
v 1.000000 1.000000 1.000000
v 1.000000 -1.000000 -1.000000
v 1.000000 1.000000 -1.000000
vt 0.625000 0.000000
vt 0.375000 0.250000
vt 0.375000 0.000000
vt 0.625000 0.250000
vt 0.375000 0.500000
vt 0.625000 0.500000
vt 0.375000 0.750000
vt 0.625000 0.750000
vt 0.375000 1.000000
vt 0.125000 0.750000
vt 0.125000 0.500000
vt 0.875000 0.500000
vt 0.625000 1.000000
vt 0.875000 0.750000
vn -1.0000 0.0000 0.0000
vn 0.0000 0.0000 -1.0000
vn 1.0000 0.0000 0.0000
vn 0.0000 0.0000 1.0000
vn 0.0000 -1.0000 0.0000
vn 0.0000 1.0000 0.0000
f 2/1/1 3/2/1 1/3/1
f 4/4/2 7/5/2 3/2/2
f 8/6/3 5/7/3 7/5/3
f 6/8/4 1/9/4 5/7/4
f 7/5/5 1/10/5 3/11/5
f 4/12/6 6/8/6 8/6/6
f 2/1/1 4/4/1 3/2/1
f 4/4/2 8/6/2 7/5/2
f 8/6/3 6/8/3 5/7/3
f 6/8/4 2/13/4 1/9/4
f 7/5/5 5/7/5 1/10/5
f 4/12/6 2/14/6 6/8/6

Answer 1

int i, j, k;
char c;
iss >> i;
iss >> c; // remove the /
iss >> j;
iss >> c; // remove the next /
iss >> k;

将 i、j、k 存储在某处等等，然后根据需要重复多次。

读取 obj 文件！ (指数)

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