class RaycastIntersectionFinder
{
public:
   RaycastIntersectionFinder()
   {
   }

   bool operator()(const SimpleVolume<int8_t>::Sampler& sampler)
   {
      // Store this so we can retrieve it later
      v3dLastPosition = sampler.getPosition();

      // If the ray is inside the volume then check if it has hit a solid voxel.
      if(!sampler.isCurrentPositionValid())
      {
         if(sampler.getVoxel() > 0) // You can replace this with your own condition if you want to.
         {
            // We've hit something, so stop traversing.
            return false;
         }
      }

      // By default we continue traversing.
      return true;
   }

   bool bFoundIntersection;
   Vector3DInt32 v3dLastPosition;
};