本文整理汇总了C++中Polygon2::clear方法的典型用法代码示例。如果您正苦于以下问题：C++ Polygon2::clear方法的具体用法？C++ Polygon2::clear怎么用？C++ Polygon2::clear使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Polygon2的用法示例。
在下文中一共展示了Polygon2::clear方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: circ
bool build_convex_polygon(
Pmwx::Ccb_halfedge_circulator ccb,
vector<pair<Pmwx::Halfedge_handle, Pmwx::Halfedge_handle> >& sides,
const CoordTranslator2& trans,
Polygon2& metric_bounds,
double max_err_mtrs,
double min_side_len)
{
double e_sq = max_err_mtrs*max_err_mtrs;
sides.clear();
metric_bounds.clear();
Pmwx::Ccb_halfedge_circulator circ(ccb);
// Bbox2 bounds;
//
// do {
// bounds += cgal2ben(circ->source()->point());
// } while (++circ != ccb);
Pmwx::Ccb_halfedge_circulator start,next;
start = ccb;
do {
--start;
if(!sides_can_merge(start,ccb))
break;
if(!within_err_metric(start,ccb,trans,e_sq))
break;
} while(start != ccb);
++start;
// now we can go around.
circ = start;
//int ne = count_circulator(start);
//printf("Poly has %d sides.\n", ne);
do {
Pmwx::Ccb_halfedge_circulator stop(circ);
do {
++stop;
} while(sides_can_merge(circ,stop) && within_err_metric(circ,stop,trans,e_sq) && stop != start);
--stop;
//printf("Pushing side of %d, %d\n", circulator_distance_to(start, circ),circulator_distance_to(start,stop));
sides.push_back(pair<Pmwx::Halfedge_handle,Pmwx::Halfedge_handle>(circ, stop));
++stop;
circ = stop;
} while(circ != start);
if(sides.size() < 3)
{
//debug_mesh_point(bounds.centroid(),1,1,1);
return false;
}
int i, j, k;
vector<Segment2> msides;
for(i = 0; i < sides.size(); ++i)
{
j = (i + 1) % sides.size();
DebugAssert(sides[i].second->target() == sides[j].first->source());
msides.push_back(Segment2(
trans.Forward(cgal2ben(sides[i].first->source()->point())),
trans.Forward(cgal2ben(sides[i].second->target()->point()))));
}
vector<Segment2> debug(msides);
for(i = 0; i < sides.size(); ++i)
{
j = (i + 1) % sides.size();
Vector2 v1(msides[i].p1,msides[i].p2);
Vector2 v2(msides[j].p1,msides[j].p2);
v1.normalize();
v2.normalize();
if(v1.dot(v2) > 0.9998 ||
!v1.left_turn(v2))
{
//debug_mesh_point(trans.Reverse(msides[i].p2),1,0,0);
return false;
}
double w = width_for_he(sides[i].first);
if(w)
{
v1 = v1.perpendicular_ccw();
v1 *= w;
msides[i].p1 += v1;
msides[i].p2 += v1;
}
}
for(j = 0; j < sides.size(); ++j)
{
i = (j + sides.size() - 1) % sides.size();
Line2 li(msides[i]), lj(msides[j]);
Point2 p;
if(!li.intersect(lj,p))
{
Assert(!"Failure to intersect.\n");
return false;
}
//.........这里部分代码省略.........