private void UpdateSlimBlock()
{
var grid = _root as IMyCubeGrid;
_block = grid?.FirstBlock(_hit.Position,
_hit.Position + _maxPrediction * _ray.Direction);
if (_block == null)
{
return;
}
Vector3 halfExtents;
_block.ComputeScaledHalfExtents(out halfExtents);
Vector3D center;
_block.ComputeScaledCenter(out center);
var bb = new BoundingBoxD(center - halfExtents, center + halfExtents);
LineD l;
var m = grid.WorldMatrixNormalizedInv;
l.From = Vector3D.Transform(_ray.From, ref m);
l.To = Vector3D.Transform(_ray.To, ref m);
l.Direction = Vector3D.TransformNormal(_ray.Direction, ref m);
l.Length = _ray.Length;
double t1, t2;
if (bb.Intersect(ref l, out t1, out t2))
{
_hitPosition = _ray.From + _ray.Direction * t1;
}
else
{
_hitPosition = _ray.From + (Vector3.Transform(center, grid.WorldMatrix) - _ray.From).Dot(_ray.Direction) * _ray.Direction;
}
}
