void RenderContext::drawAttachmentPoint (RenderItemAttachmentPoint& ri)
{
setSingleSource(ri.color);
if (ri.highlighted && opt.highlightColorEnable)
setSingleSource(opt.highlightColor);
setLineWidth(_settings.bondLineWidth);
moveTo(ri.p0);
lineTo(ri.p1);
checkPathNonEmpty();
bbIncludePath(false);
cairo_stroke(_cr);
cairoCheckStatus();
Vec2f n;
n.copy(ri.dir);
n.rotateL(1, 0);
Vec2f p, q, r;
int waveCnt = 10;
float waveLength = 0.5f;
float waveWidth = waveLength / waveCnt;
float slopeFactor = 0.2f;
p.lineCombin(ri.p1, n, -0.5f * waveLength);
moveTo(p);
float step = waveLength / waveCnt;
for (int i = 0; i < waveCnt; ++i) {
int turn = ((i & 1) ? 1 : -1);
q.lineCombin(p, ri.dir, waveWidth * turn);
q.addScaled(n, waveWidth * slopeFactor);
p.addScaled(n, step);
r.lineCombin(p, ri.dir, waveWidth * turn);
r.addScaled(n, -waveWidth * slopeFactor);
cairo_curve_to(_cr, q.x, q.y, r.x, r.y, p.x, p.y);
}
checkPathNonEmpty();
bbIncludePath(false);
cairo_stroke(_cr);
cairoCheckStatus();
QS_DEF(TextItem, ti);
ti.clear();
if (ri.number > 0) {
bprintf(ti.text, "%d", ri.number);
ti.fontsize = FONT_SIZE_ATTACHMENT_POINT_INDEX;
setTextItemSize(ti, ri.p1);
float sz = ti.bbsz.length();
ti.bbp.addScaled(n, -(sz/2 + _settings.bondLineWidth));
ti.bbp.addScaled(ri.dir, -(sz/2 + waveWidth + _settings.bondLineWidth));
drawTextItemText(ti);
}
}
