pts.cpp

// UFO
#include <ufo/io/file_handler.hpp>
#include <ufo/io/pts.hpp>
 
// STL
#include <filesystem>
#include <format>
#include <stdexcept>
 
namespace ufo
{
CloudProperties cloudPropertiesPTS(std::filesystem::path const& file)
{
    FileHandler fp(file.c_str(), "rb");
 
    if (!fp) {
        throw std::runtime_error(std::format(
            "[UFO | Cloud Properties PTS] Failed to open file: {}", file.string()));
    }
 
    char        line[1024];
    std::size_t size{};
    if (nullptr != std::fgets(line, sizeof line, fp.get())) {
        std::sscanf(line, "%zu", &size);
    }
 
    if (0 == size) {
        throw std::runtime_error(std::format(
            "[UFO | Cloud Properties PTS] Unable to read header of file: {}", file.string()));
    }
 
    std::array<double, 7> fields;
    auto                  num_fields =
        std::sscanf(line, "%lf %lf %lf %lf %lf %lf %lf", &fields[0], &fields[1], &fields[2],
                    &fields[3], &fields[4], &fields[5], &fields[6]);
 
    CloudProperties prop;
    prop.color     = 6 == num_fields || 7 == num_fields;
    prop.alpha     = false;
    prop.intensity = 4 == num_fields || 7 == num_fields;
    prop.normal    = false;
 
    return prop;
}
}  // namespace ufo