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Commit c61bda50 authored by Tiago Peixoto's avatar Tiago Peixoto
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Improve self-loop drawing in cairo_draw()

parent ea88db33
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src/graph/draw/graph_cairo_draw.cc
View file @ c61bda50
......@@ -832,7 +832,7 @@ public:
{
double angle = 0;
double len = 0;
if (pos_begin != pos_end)
if (_t.get_pos() != _s.get_pos())
{
angle = atan2(pos_end.second - pos_begin.second,
pos_end.first - pos_begin.first);
......@@ -844,12 +844,12 @@ public:
cr.rotate(angle);
cr.scale(len, 1.);
for (size_t i = 0; i < controls.size(); i += 2)
cr.user_to_device(controls[i], controls[i + 1]);
for (size_t i = 0; i < controls.size() / 2; ++i)
cr.user_to_device(controls[2 * i], controls[2 * i + 1]);
cr.restore();
for (size_t i = 0; i < controls.size(); i += 2)
cr.device_to_user(controls[i], controls[i + 1]);
for (size_t i = 0; i < controls.size() / 2; ++i)
cr.device_to_user(controls[2 * i], controls[2 * i + 1]);
}
else
{
......@@ -858,12 +858,12 @@ public:
cr.save();
cr.translate(pos_begin.first, pos_begin.second);
cr.scale(len / sqrt(2), len / sqrt(2));
for (size_t i = 0; i < controls.size(); i += 2)
cr.user_to_device(controls[i], controls[i + 1]);
for (size_t i = 0; i < controls.size() / 2; ++i)
cr.user_to_device(controls[2 * i], controls[2 * i + 1]);
cr.restore();
for (size_t i = 0; i < controls.size(); i += 2)
cr.device_to_user(controls[i], controls[i + 1]);
for (size_t i = 0; i < controls.size() / 2; ++i)
cr.device_to_user(controls[2 * i], controls[2 * i + 1]);
}
size_t N = controls.size();
......@@ -871,8 +871,24 @@ public:
controls[1]), cr);
pos_end = _t.get_anchor(make_pair(controls[N - 2],
controls[N - 1]), cr);
}
if (_s.get_pos() == _t.get_pos())
{
double ox = pos_begin.first - _s.get_pos().first +
pos_end.first - _t.get_pos().first;
double oy = pos_begin.second - _s.get_pos().second +
pos_end.second - _t.get_pos().second;
for (size_t i = 0; i < controls.size() / 2; ++i)
{
controls[2 * i] += ox / 2;
controls[2 * i + 1] += oy / 2;
}
pos_begin = _s.get_anchor(make_pair(controls[0],
controls[1]), cr);
pos_end = _t.get_anchor(make_pair(controls[N - 2],
controls[N - 1]), cr);
}
}
pos_t pos_end_c = pos_end, pos_begin_c = pos_begin;
double marker_size = _attrs.template get<double>(EDGE_MARKER_SIZE);
......@@ -1428,9 +1444,10 @@ void apply_transforms(GraphInterface& gi, boost::any pos, double xx, double yx,
struct do_put_parallel_splines
{
template <class Graph, class PosMap, class LabelMap, class SplinesMap>
template <class Graph, class PosMap, class LabelMap, class SplinesMap,
class AngleMap>
void operator()(Graph& g, PosMap pos, LabelMap l, SplinesMap spline,
double loop_angle, double parallel_distance) const
AngleMap loop_angle, double parallel_distance) const
{
typedef typename graph_traits<Graph>::edge_descriptor edge_t;
typedef typename graph_traits<Graph>::vertex_descriptor vertex_t;
......@@ -1466,21 +1483,54 @@ struct do_put_parallel_splines
pair<double, double> dist;
dist.first = get(pos, s)[0] - cm.first;
dist.second = get(pos, s)[1] - cm.second;
double theta = atan2(dist.second, dist.first) - M_PI / 2;
if (!isnan(loop_angle))
theta = loop_angle;
typename property_traits<SplinesMap>::value_type sp(4), sp2(4);
double theta = get(loop_angle, s);
if (isnan(theta))
theta = atan2(dist.second, dist.first) - M_PI / 2;
typename property_traits<SplinesMap>::value_type sp(22), sp2(22);
for (size_t j = 0; j < pes.size(); ++j)
{
sp[0] = -0.5 * (j + 1);
sp[1] = 0.75 * (j + 1);
sp[2] = 0.5 * (j + 1);
sp[3] = 0.75 * (j + 1);
double d = 4 * (sqrt(2) - 1) / 3;
double r = (j + 1) / 4.;
double yoff = r / 4;
sp[0] = d * r;
sp[1] = 0 + yoff;
sp[1 * 2 + 0] = r;
sp[1 * 2 + 1] = r - d * r + yoff;
sp[2 * 2 + 0] = r;
sp[2 * 2 + 1] = r + yoff;
sp[3 * 2 + 0] = r;
sp[3 * 2 + 1] = r + d * r + yoff;
sp2[0] = sp[0] * cos(theta) - sp[1] * sin(theta);
sp2[1] = sp[0] * sin(theta) + sp[1] * cos(theta);
sp2[2] = sp[2] * cos(theta) - sp[3] * sin(theta);
sp2[3] = sp[2] * sin(theta) + sp[3] * cos(theta);
sp[4 * 2 + 0] = d * r;
sp[4 * 2 + 1] = 2 * r + yoff;
sp[5 * 2 + 0] = 0;
sp[5 * 2 + 1] = 2 * r + yoff;
sp[6 * 2 + 0] = -d * r;
sp[6 * 2 + 1] = 2 * r + yoff;
sp[7 * 2 + 0] = - r;
sp[7 * 2 + 1] = r + d * r + yoff;
sp[8 * 2 + 0] = -r;
sp[8 * 2 + 1] = r + yoff;
sp[9 * 2 + 0] = - r;
sp[9 * 2 + 1] = r - d * r + yoff;
sp[10 * 2 + 0] = - d * r;
sp[10 * 2 + 1] = 0 + yoff;
for (size_t i = 0; i < 11; ++i)
{
sp2[i * 2 + 0] = sp[i * 2 + 0] * cos(theta) - sp[i * 2 + 1] * sin(theta);
sp2[i * 2 + 1] = sp[i * 2 + 0] * sin(theta) + sp[i * 2 + 1] * cos(theta);
}
put(spline, skey_t(pes[j]), sp2);
}
......@@ -1522,15 +1572,18 @@ struct do_put_parallel_splines
void put_parallel_splines(GraphInterface& gi, boost::any opos,
boost::any ol, boost::any splines,
double loop_angle, double parallel_distance)
boost::any loop_angle,
double parallel_distance)
{
DynamicPropertyMapWrap<vector<double>, GraphInterface::vertex_t>
pos(opos, vertex_scalar_vector_properties());
DynamicPropertyMapWrap<int, GraphInterface::edge_t>
l(ol, edge_scalar_properties());
DynamicPropertyMapWrap<double, GraphInterface::vertex_t>
angle(loop_angle, vertex_scalar_properties());
run_action<graph_tool::detail::always_directed>()
(gi, bind<void>(do_put_parallel_splines(), _1, pos, l, _2, loop_angle,
(gi, bind<void>(do_put_parallel_splines(), _1, pos, l, _2, angle,
parallel_distance),
edge_scalar_vector_properties())(splines);
}
......
src/graph_tool/draw/cairo_draw.py
View file @ c61bda50
......@@ -318,6 +318,12 @@ def position_parallel_edges(g, pos, loop_angle=float("nan"),
parallel_distance=1):
lp = label_parallel_edges(GraphView(g, directed=False))
ll = label_self_loops(g)
if isinstance(loop_angle, PropertyMap):
angle = loop_angle
else:
angle = g.new_vertex_property("double")
angle.a = float(loop_angle)
g = GraphView(g, directed=True)
if ((len(lp.fa) == 0 or lp.fa.max() == 0) and
(len(ll.fa) == 0 or ll.fa.max() == 0)):
......@@ -328,7 +334,7 @@ def position_parallel_edges(g, pos, loop_angle=float("nan"),
_prop("v", g, pos),
_prop("e", g, lp),
_prop("e", g, spline),
loop_angle,
_prop("v", g, angle),
parallel_distance)
return spline
......@@ -378,7 +384,7 @@ def cairo_draw(g, pos, cr, vprops=None, eprops=None, vorder=None, eorder=None,
Vertex color map.
ecmap : :class:`matplotlib.colors.Colormap` (default: :class:`matplotlib.cm.jet`)
Edge color map.
loop_angle : float (optional, default: ``nan``)
loop_angle : float or :class:`~graph_tool.PropertyMap` (optional, default: ``nan``)
Angle used to draw self-loops. If ``nan`` is given, they will be placed
radially from the center of the layout.
parallel_distance : float (optional, default: ``None``)
......
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