Function parseTriple

core/3d/ObjLoader.cpp:290–324

Parse triples: i, i/j/k, i//k, i/j

// Parse triples: i, i/j/k, i//k, i/j
static vertex_index parseTriple(const char*& token, int vsize, int vnsize, int vtsize)
{
    vertex_index vi(-1);

    vi.v_idx = fixIndex(atoi(token), vsize);
    token += strcspn(token, "/ \t\r");
    if (token[0] != '/')
    {
        return vi;
    }
    token++;

    // i//k
    if (token[0] == '/')
    {
        token++;
        vi.vn_idx = fixIndex(atoi(token), vnsize);
        token += strcspn(token, "/ \t\r");
        return vi;
    }

    // i/j/k or i/j
    vi.vt_idx = fixIndex(atoi(token), vtsize);
    token += strcspn(token, "/ \t\r");
    if (token[0] != '/')
    {
        return vi;
    }

    // i/j/k
    token++;  // skip '/'
    vi.vn_idx = fixIndex(atoi(token), vnsize);
    token += strcspn(token, "/ \t\r");
    return vi;
}

static std::string_view nextWord(const char* token) {
    const char* endptr = strpbrk(token, " \t");