public math_stroke()
{
m_width = 0.5;
m_width_abs = 0.5;
m_width_eps = 0.5 / 1024.0;
m_width_sign = 1;
m_miter_limit = 4.0;
m_inner_miter_limit = 1.01;
m_approx_scale = 1.0;
m_line_cap = line_cap_e.butt_cap;
m_line_join = line_join_e.miter_join;
m_inner_join = inner_join_e.inner_miter;
}