public override void DrawCircle(double cx, double cy, double radius)
{
if (thinlinemode != ThinLineModeFlag.OwnThinLines)
{
base.DrawCircle(cx, cy, radius);
return;
}
stipplebit = 0x8000;
int nx = 0, ny = 0, px = 0, py = 0;
int buffersize = Clipper.ClipCircle(cx, cy, radius, clipbuffer, clipMinX, clipMinY, clipMaxX, clipMaxY);
if (buffersize <= 0)
{
return;
}
if (buffersize >= 5) //circle is clipped to arcs
{ //the circle is divided into arc(s)
double bulge, x1, y1, x2, y2;
for (int l = 0; l < buffersize; l += 5)
{
x1 = clipbuffer[l];
y1 = clipbuffer[l + 1];
x2 = clipbuffer[l + 2];
y2 = clipbuffer[l + 3];
bulge = clipbuffer[l + 4];
//draw arc here instead of calling DrawArc to avoid arc clipping because we already clipped!
GeomUtil.FlattenArc(x1, y1, x2, y2, bulge, true, flattentol, (x, y, moveto) =>
{
if (moveto)
{
px = GFXUtil.FloatToInt(x);
py = GFXUtil.FloatToInt(y);
}
else
{
nx = GFXUtil.FloatToInt(x);
ny = GFXUtil.FloatToInt(y);
Line_Internal(px, py, nx, ny, false);
px = nx;
py = ny;
}
});
}
return;
}
for (double l = -1; l <= 1.0001; l += 2)
{ //2 arcs gives circle //TODO: make flatten circle in GeomUtil instead
GeomUtil.FlattenArc(cx + radius * l, cy, cx - radius * l, cy, 1.0, true, flattentol, (x, y, moveto) =>
{
if (moveto)
{
px = GFXUtil.FloatToInt(x);
py = GFXUtil.FloatToInt(y);
}
else
{
nx = GFXUtil.FloatToInt(x);
ny = GFXUtil.FloatToInt(y);
Line_Internal(px, py, nx, ny, false);
px = nx;
py = ny;
}
});
}
}
