读取 obj 文件！ （指数）

Question

我想要做的是读取面孔（f），但他们有我不知道如何删除的“/”？基本上我想要的是获取存储在临时变量中的面孔编号。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。