private void ReAllocLut(T radius)
{
m_radius = radius;
m_diameter = Basics.CeilingUint(radius) * 2;
m_start = -(int)(m_diameter / 2 - 1);
int size = (int)m_diameter << (int)SubPixelScale.Shift;
if (size > m_weight_array.Size())
{
m_weight_array.Resize(size);
}
}