#include "shared/math.hh"

namespace shared {
namespace math {

glm::vec3 angle_to_dir(const angles& ang) noexcept {
    const float x = std::cos(ang.pitch) * std::cos(ang.yaw);
    const float y = std::sin(ang.pitch);
    const float z = std::cos(ang.pitch) * std::sin(ang.yaw);
    return {x, y, z};
}

bool is_inside_draw(const coords& a, const coords& b,
                    const std::int32_t draw_distance) noexcept {
    const auto x2 = (a.x - b.x) * (a.x - b.x);
    const auto z2 = (a.z - b.z) * (a.z - b.z);
    const auto dd2 = draw_distance * draw_distance;

    return (x2 < dd2 - z2) && (z2 < dd2 - x2);
}

} // namespace math
} // namespace shared