//----------------------------------------------------------------
public void begin(double x, double y, int len)
{
double tx;
double ty;
tx = x;
ty = y;
m_trans.Transform(ref tx, ref ty);
int x1 = agg_basics.iround(tx * (double)subpixel_scale_e.subpixel_scale);
int y1 = agg_basics.iround(ty * (double)subpixel_scale_e.subpixel_scale);
tx = x + len;
ty = y;
m_trans.Transform(ref tx, ref ty);
int x2 = agg_basics.iround(tx * (double)subpixel_scale_e.subpixel_scale);
int y2 = agg_basics.iround(ty * (double)subpixel_scale_e.subpixel_scale);
m_li_x = new dda2_line_interpolator(x1, x2, (int)len);
m_li_y = new dda2_line_interpolator(y1, y2, (int)len);
}
//--------------------------------------------------------------------
public line_bresenham_interpolator(int x1, int y1, int x2, int y2)
{
m_x1_lr = (line_lr(x1));
m_y1_lr = (line_lr(y1));
m_x2_lr = (line_lr(x2));
m_y2_lr = (line_lr(y2));
m_ver = (Math.Abs(m_x2_lr - m_x1_lr) < Math.Abs(m_y2_lr - m_y1_lr));
if (m_ver)
{
m_len = (int)Math.Abs(m_y2_lr - m_y1_lr);
}
else
{
m_len = (int)Math.Abs(m_x2_lr - m_x1_lr);
}
m_inc = (m_ver ? ((y2 > y1) ? 1 : -1) : ((x2 > x1) ? 1 : -1));
m_interpolator = new dda2_line_interpolator(m_ver ? x1 : y1,
m_ver ? x2 : y2,
(int)m_len);
}
//----------------------------------------------------------------
public void resynchronize(double xe, double ye, int len)
{
m_trans.Transform(ref xe, ref ye);
m_li_x = new dda2_line_interpolator(m_li_x.y(), agg_basics.iround(xe * (double)subpixel_scale_e.subpixel_scale), (int)len);
m_li_y = new dda2_line_interpolator(m_li_y.y(), agg_basics.iround(ye * (double)subpixel_scale_e.subpixel_scale), (int)len);
}