obj.cpp

// UFO
#include <ufo/io/file_handler.hpp>
#include <ufo/io/obj.hpp>
 
// STL
#include <filesystem>
#include <format>
#include <stdexcept>
 
namespace ufo
{
CloudProperties cloudPropertiesOBJ(std::filesystem::path const& file)
{
    FileHandler fp(file.c_str(), "rb");
 
    if (!fp) {
        throw std::runtime_error(std::format(
            "[UFO | Cloud Properties OBJ] Failed to open file: {}", file.string()));
    }
 
    CloudProperties prop;
    prop.alpha     = false;
    prop.intensity = false;
 
    for (char line[1024]; nullptr != std::fgets(line, sizeof line, fp.get());) {
        Vec3d   p;
        FineRGB c;
        Normal  n;
        if (3 == std::sscanf(line, "vn %f %f %f", &n.x, &n.y, &n.z)) {
            prop.normal = true;
        } else if (6 == std::sscanf(line, "v %lf %lf %lf %f %f %f", &p.x, &p.y, &p.z, &c.red,
                                    &c.green, &c.blue)) {
            prop.color = true;
        }
 
        if (prop.color && prop.normal) {
            break;
        }
    }
 
    return prop;
}
}  // namespace ufo