//----------------------------------------------------------------
public void Begin(double x, double y, int len)
{
// Calculate transformed coordinates at x1,y1
double xt = x;
double yt = y;
m_trans_dir.Transform(ref xt, ref yt);
int x1 = AggBasics.iround(xt * SUBPIXEL_SCALE);
int y1 = AggBasics.iround(yt * SUBPIXEL_SCALE);
double dx;
double dy;
double delta = 1 / (double)SUBPIXEL_SCALE;
// Calculate scale by X at x1,y1
dx = xt + delta;
dy = yt;
m_trans_inv.Transform(ref dx, ref dy);
dx -= x;
dy -= y;
int sx1 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Calculate scale by Y at x1,y1
dx = xt;
dy = yt + delta;
m_trans_inv.Transform(ref dx, ref dy);
dx -= x;
dy -= y;
int sy1 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Calculate transformed coordinates at x2,y2
x += len;
xt = x;
yt = y;
m_trans_dir.Transform(ref xt, ref yt);
int x2 = AggBasics.iround(xt * SUBPIXEL_SCALE);
int y2 = AggBasics.iround(yt * SUBPIXEL_SCALE);
// Calculate scale by X at x2,y2
dx = xt + delta;
dy = yt;
m_trans_inv.Transform(ref dx, ref dy);
dx -= x;
dy -= y;
int sx2 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Calculate scale by Y at x2,y2
dx = xt;
dy = yt + delta;
m_trans_inv.Transform(ref dx, ref dy);
dx -= x;
dy -= y;
int sy2 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Initialize the interpolators
m_coord_x = new LineInterpolatorDDA2(x1, x2, (int)len);
m_coord_y = new LineInterpolatorDDA2(y1, y2, (int)len);
m_scale_x = new LineInterpolatorDDA2(sx1, sx2, (int)len);
m_scale_y = new LineInterpolatorDDA2(sy1, sy2, (int)len);
}
public LineInterpolatorAABase(OutlineRenderer ren, LineParameters lp)
{
m_lp = lp;
m_li = new LineInterpolatorDDA2(lp.vertical ? LineAA.DblHr(lp.x2 - lp.x1) : LineAA.DblHr(lp.y2 - lp.y1),
lp.vertical ? Math.Abs(lp.y2 - lp.y1) : Math.Abs(lp.x2 - lp.x1) + 1);
m_ren = ren;
m_len = ((lp.vertical == (lp.inc > 0)) ? -lp.len : lp.len);
m_x = (lp.x1 >> LineAA.SUBPIXEL_SHIFT);
m_y = (lp.y1 >> LineAA.SUBPIXEL_SHIFT);
m_old_x = (m_x);
m_old_y = (m_y);
m_count = ((lp.vertical ? Math.Abs((lp.y2 >> LineAA.SUBPIXEL_SHIFT) - m_y) :
Math.Abs((lp.x2 >> LineAA.SUBPIXEL_SHIFT) - m_x)));
m_width = (ren.SubPixelWidth);
//m_max_extent(m_width >> (line_subpixel_shift - 2));
m_max_extent = ((m_width + LineAA.SUBPIXEL_MARK) >> LineAA.SUBPIXEL_SHIFT);
m_step = 0;
LineInterpolatorDDA2 li = new LineInterpolatorDDA2(0,
lp.vertical ? (lp.dy << LineAA.SUBPIXEL_SHIFT) : (lp.dx << LineAA.SUBPIXEL_SHIFT),
lp.len);
int i;
int stop = m_width + LineAA.SUBPIXEL_SCALE * 2;
for (i = 0; i < MAX_HALF_WIDTH; ++i)
{
m_dist[i] = li.Y;
if (m_dist[i] >= stop) break;
li.Next();
}
m_dist[i++] = 0x7FFF0000;
}
//----------------------------------------------------------------
public void ReSync(double xe, double ye, int len)
{
// Assume x1,y1 are equal to the ones at the previous end point
int x1 = m_coord_x.Y;
int y1 = m_coord_y.Y;
int sx1 = m_scale_x.Y;
int sy1 = m_scale_y.Y;
// Calculate transformed coordinates at x2,y2
double xt = xe;
double yt = ye;
m_trans_dir.Transform(ref xt, ref yt);
int x2 = AggBasics.iround(xt * SUBPIXEL_SCALE);
int y2 = AggBasics.iround(yt * SUBPIXEL_SCALE);
double delta = 1 / (double)SUBPIXEL_SCALE;
double dx;
double dy;
// Calculate scale by X at x2,y2
dx = xt + delta;
dy = yt;
m_trans_inv.Transform(ref dx, ref dy);
dx -= xe;
dy -= ye;
int sx2 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Calculate scale by Y at x2,y2
dx = xt;
dy = yt + delta;
m_trans_inv.Transform(ref dx, ref dy);
dx -= xe;
dy -= ye;
int sy2 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Initialize the interpolators
m_coord_x = new LineInterpolatorDDA2(x1, x2, (int)len);
m_coord_y = new LineInterpolatorDDA2(y1, y2, (int)len);
m_scale_x = new LineInterpolatorDDA2(sx1, sx2, (int)len);
m_scale_y = new LineInterpolatorDDA2(sy1, sy2, (int)len);
}
//----------------------------------------------------------------
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 = AggBasics.iround(tx * (double)SUB_PIXEL_SCALE);
int y1 = AggBasics.iround(ty * (double)SUB_PIXEL_SCALE);
tx = x + len;
ty = y;
m_trans.Transform(ref tx, ref ty);
int x2 = AggBasics.iround(tx * (double)SUB_PIXEL_SCALE);
int y2 = AggBasics.iround(ty * (double)SUB_PIXEL_SCALE);
m_li_x = new LineInterpolatorDDA2(x1, x2, (int)len);
m_li_y = new LineInterpolatorDDA2(y1, y2, (int)len);
}
//--------------------------------------------------------------------
public LineInterpolatorBresenham(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 LineInterpolatorDDA2(m_ver ? x1 : y1,
m_ver ? x2 : y2,
(int)m_len);
}
//--------------------------------------------------------------------
public LineInterpolatorBresenham(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 LineInterpolatorDDA2(m_ver ? x1 : y1,
m_ver ? x2 : y2,
(int)m_len);
}
//----------------------------------------------------------------
public void ReSync(double xe, double ye, int len)
{
// Assume x1,y1 are equal to the ones at the previous end point
int x1 = m_coord_x.Y;
int y1 = m_coord_y.Y;
int sx1 = m_scale_x.Y;
int sy1 = m_scale_y.Y;
// Calculate transformed coordinates at x2,y2
double xt = xe;
double yt = ye;
m_trans_dir.Transform(ref xt, ref yt);
int x2 = AggBasics.iround(xt * SUBPIXEL_SCALE);
int y2 = AggBasics.iround(yt * SUBPIXEL_SCALE);
double delta = 1 / (double)SUBPIXEL_SCALE;
double dx;
double dy;
// Calculate scale by X at x2,y2
dx = xt + delta;
dy = yt;
m_trans_inv.Transform(ref dx, ref dy);
dx -= xe;
dy -= ye;
int sx2 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Calculate scale by Y at x2,y2
dx = xt;
dy = yt + delta;
m_trans_inv.Transform(ref dx, ref dy);
dx -= xe;
dy -= ye;
int sy2 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Initialize the interpolators
m_coord_x = new LineInterpolatorDDA2(x1, x2, (int)len);
m_coord_y = new LineInterpolatorDDA2(y1, y2, (int)len);
m_scale_x = new LineInterpolatorDDA2(sx1, sx2, (int)len);
m_scale_y = new LineInterpolatorDDA2(sy1, sy2, (int)len);
}
//----------------------------------------------------------------
public void Begin(double x, double y, int len)
{
// Calculate transformed coordinates at x1,y1
double xt = x;
double yt = y;
m_trans_dir.Transform(ref xt, ref yt);
int x1 = AggBasics.iround(xt * SUBPIXEL_SCALE);
int y1 = AggBasics.iround(yt * SUBPIXEL_SCALE);
double dx;
double dy;
double delta = 1 / (double)SUBPIXEL_SCALE;
// Calculate scale by X at x1,y1
dx = xt + delta;
dy = yt;
m_trans_inv.Transform(ref dx, ref dy);
dx -= x;
dy -= y;
int sx1 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Calculate scale by Y at x1,y1
dx = xt;
dy = yt + delta;
m_trans_inv.Transform(ref dx, ref dy);
dx -= x;
dy -= y;
int sy1 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Calculate transformed coordinates at x2,y2
x += len;
xt = x;
yt = y;
m_trans_dir.Transform(ref xt, ref yt);
int x2 = AggBasics.iround(xt * SUBPIXEL_SCALE);
int y2 = AggBasics.iround(yt * SUBPIXEL_SCALE);
// Calculate scale by X at x2,y2
dx = xt + delta;
dy = yt;
m_trans_inv.Transform(ref dx, ref dy);
dx -= x;
dy -= y;
int sx2 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Calculate scale by Y at x2,y2
dx = xt;
dy = yt + delta;
m_trans_inv.Transform(ref dx, ref dy);
dx -= x;
dy -= y;
int sy2 = (int)AggBasics.uround(SUBPIXEL_SCALE / Math.Sqrt(dx * dx + dy * dy)) >> SUBPIXEL_SHIFT;
// Initialize the interpolators
m_coord_x = new LineInterpolatorDDA2(x1, x2, (int)len);
m_coord_y = new LineInterpolatorDDA2(y1, y2, (int)len);
m_scale_x = new LineInterpolatorDDA2(sx1, sx2, (int)len);
m_scale_y = new LineInterpolatorDDA2(sy1, sy2, (int)len);
}
//----------------------------------------------------------------
public void ReSync(double xe, double ye, int len)
{
m_trans.Transform(ref xe, ref ye);
m_li_x = new LineInterpolatorDDA2(m_li_x.Y, AggBasics.iround(xe * (double)SUB_PIXEL_SCALE), (int)len);
m_li_y = new LineInterpolatorDDA2(m_li_y.Y, AggBasics.iround(ye * (double)SUB_PIXEL_SCALE), (int)len);
}
