// when spline order is even.
// The valid interval for evaluation is [start+offset, last-offset)
// when spline order is odd.
- // Where offset = vcl_floor(spline / 2 ).
+ // Where offset = std::floor(spline / 2 ).
// Note that the last pixel is not included in the valid region
// with odd spline orders.
typename RegionType::SizeType size = m_GridRegion.GetSize();