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#include <2geom/d2.h>
#include <2geom/sbasis.h>
#include <2geom/bezier-to-sbasis.h>
#include <2geom/sbasis-geometric.h>
#include <toys/path-cairo.h>
#include <toys/toy-framework-2.h>
#include <vector>
using std::vector;
using namespace Geom;
static void dot_plot(cairo_t *cr, Piecewise<D2<SBasis> > const &M, double space=10){
//double dt=(M[0].cuts.back()-M[0].cuts.front())/space;
Piecewise<D2<SBasis> > Mperp = rot90(derivative(M)) * 2;
for( double t = M.cuts.front(); t < M.cuts.back(); t += space) {
Point pos = M(t), perp = Mperp(t);
draw_line_seg(cr, pos + perp, pos - perp);
}
cairo_pw_d2_sb(cr, M);
cairo_stroke(cr);
}
#define SIZE 4
class LengthTester: public Toy {
public:
PointSetHandle b1_handle;
PointSetHandle b2_handle;
void draw(cairo_t *cr,
std::ostringstream *notify,
int width, int height, bool save, std::ostringstream *timer_stream) override {
D2<SBasis> B1 = b1_handle.asBezier();
D2<SBasis> B2 = b2_handle.asBezier();
Piecewise<D2<SBasis> >B;
B.concat(Piecewise<D2<SBasis> >(B1));
B.concat(Piecewise<D2<SBasis> >(B2));
// testing fuse_nearby_ends
std::vector< Piecewise<D2<SBasis> > > pieces;
pieces = fuse_nearby_ends(split_at_discontinuities(B),9);
Piecewise<D2<SBasis> > C;
for (auto & piece : pieces){
C.concat(piece);
}
// testing fuse_nearby_ends
cairo_set_line_width (cr, .5);
cairo_set_source_rgba (cr, 0., 0.5, 0., 1);
//cairo_d2_sb(cr, B1);
cairo_pw_d2_sb(cr, C);
//cairo_pw_d2_sb(cr, B);
cairo_stroke(cr);
Timer tm;
tm.ask_for_timeslice();
tm.start();
Piecewise<D2<SBasis> > uniform_B = arc_length_parametrization(B);
Timer::Time als_time = tm.lap();
*timer_stream << "arc_length_parametrization, time = " << als_time << std::endl;
cairo_set_source_rgba (cr, 0., 0., 0.9, 1);
dot_plot(cr,uniform_B);
cairo_stroke(cr);
*notify << "pieces = " << uniform_B.size() << ";\n";
Toy::draw(cr, notify, width, height, save,timer_stream);
}
public:
LengthTester(){
for(int i = 0; i < SIZE; i++) {
b1_handle.push_back(150+uniform()*300,150+uniform()*300);
b2_handle.push_back(150+uniform()*300,150+uniform()*300);
}
b1_handle.pts[0] = Geom::Point(150,150);
b1_handle.pts[1] = Geom::Point(150,150);
b1_handle.pts[2] = Geom::Point(150,450);
b1_handle.pts[3] = Geom::Point(450,150);
handles.push_back(&b1_handle);
handles.push_back(&b2_handle);
}
};
int main(int argc, char **argv) {
init(argc, argv, new LengthTester);
return 0;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
//vim:filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99:
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