public LineInterpolatorAAData(OutlineRenderer ren, LineParameters lp)
{
_ren = ren;
//TODO: consider resuable array
_dist = ren.GetFreeDistArray(); // new int[MAX_HALF_WIDTH + 1];
_covers = ren.GetFreeConvArray(); // new byte[MAX_HALF_WIDTH * 2 + 4];
_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);
//---------------------------------------------------------
_lp = lp;
_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);
_count = ((lp.vertical ? Math.Abs((lp.y2 >> LineAA.SUBPIXEL_SHIFT) - m_y) :
Math.Abs((lp.x2 >> LineAA.SUBPIXEL_SHIFT) - m_x)));
_width = (ren.SubPixelWidth);
//m_max_extent(m_width >> (line_subpixel_shift - 2));
_max_extent = ((_width + LineAA.SUBPIXEL_MARK) >> LineAA.SUBPIXEL_SHIFT);
m_step = 0;
//-------------------
var li = new LineInterpolatorDDA2S(0, lp.vertical ?
(lp.dy << LineAA.SUBPIXEL_SHIFT) :
(lp.dx << LineAA.SUBPIXEL_SHIFT),
lp.len);
int i;
int stop = _width + LineAA.SUBPIXEL_SCALE * 2;
for (i = 0; i < MAX_HALF_WIDTH; ++i)
{
//assign and eval
//#if DEBUG
// if (li.Y == 194)
// {
// }
//#endif
if ((_dist[i] = li.Y) >= stop)
{
break;
}
li.Next();
}
_dist[i++] = 0x7FFF0000;
}
public void Begin(double x, double y, int len)
{
double tx = x;
double ty = y;
Transformer.Transform(ref tx, ref ty);
int x1 = AggMath.iround(tx * SUB_PIXEL_SCALE);
int y1 = AggMath.iround(ty * SUB_PIXEL_SCALE);
//
tx = x + len; //***
ty = y; //**
Transformer.Transform(ref tx, ref ty);
int x2 = AggMath.iround(tx * SUB_PIXEL_SCALE);
int y2 = AggMath.iround(ty * SUB_PIXEL_SCALE);
//
_li_x = new LineInterpolatorDDA2S(x1, x2, len);
_li_y = new LineInterpolatorDDA2S(y1, y2, len);
}
