thief-mission-viewer/project/code/LGS/Extensions.cs

using System.IO;
using System.Numerics;

namespace KeepersCompound.LGS;

public static class Extensions
{
    public static Vector3 ReadVec3(this BinaryReader reader)
    {
        return new Vector3(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
    }
}