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implement Curve::covers() in a very primitive way (also note: fails for actual spline curves)

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This commit is contained in:
Paul Davis 2013-12-09 21:03:16 -05:00
parent e169f5c17f
commit a631350f93
1 changed files with 18 additions and 3 deletions
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21
libs/canvas/curve.cc
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@ -103,8 +103,6 @@ Curve::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
void
Curve::render_path (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
std::cerr << whatami() << '/' << name << " render curve w/" << _points.size() << " points, " << first_control_points.size() << " first and "
<< second_control_points.size() << " second\n";
PolyItem::render_curve (area, context, first_control_points, second_control_points);
}
@ -213,7 +211,24 @@ Curve::solve (std::vector<double> const & rhs)
}
bool
Curve::covers (Duple const & point) const
Curve::covers (Duple const & pc) const
{
Duple point = canvas_to_item (pc);
/* XXX Hellaciously expensive ... */
for (Points::const_iterator p = _points.begin(); p != _points.end(); ++p) {
const Coord dx = point.x - (*p).x;
const Coord dy = point.y - (*p).y;
const Coord dx2 = dx * dx;
const Coord dy2 = dy * dy;
if ((dx2 < 2.0 && dy2 < 2.0) || (dx2 + dy2 < 4.0)) {
std::cerr << whatami() << '/' << name << " COVERS " << point << '\n';
return true;
}
}
return false;
}