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#include <2geom/d2.h>
#include <2geom/sbasis.h>
#include <2geom/bezier-to-sbasis.h>
#include <toys/path-cairo.h>
#include <toys/toy-framework-2.h>
using std::vector;
using namespace std;
using namespace Geom;
static double exp_rescale(double x){ return std::pow(10, x);}
std::string exp_formatter(double x){ return default_formatter(exp_rescale(x));}
static void plot(cairo_t* cr, SBasis const &B,double vscale=1,double a=0,double b=1){
D2<SBasis> plot;
plot[0]=SBasis(Linear(150+a*300,150+b*300));
plot[1]=B*(-vscale);
plot[1]+=300;
cairo_d2_sb(cr, plot);
cairo_stroke(cr);
}
static void plot_bar(cairo_t* cr, double height, double vscale=1,double a=0,double b=1){
cairo_move_to(cr, Geom::Point(150+300*a,-height*vscale+300));
cairo_line_to(cr, Geom::Point(150+300*b,-height*vscale+300));
}
static void plot_bar(cairo_t* cr, Interval height, double vscale=1,double a=0,double b=1){
Point A(150+300*a,-height.max()*vscale+300);
Point B(150+300*b,-height.min()*vscale+300);
cairo_rectangle(cr, Rect(A,B) );
}
class BoundsTester: public Toy {
void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream) override {
for (unsigned i=0;i<size;i++){
hand.pts[i ][0]=150+15*(i-size);
hand.pts[i+size][0]=450+15*(i+1);
cairo_move_to(cr, Geom::Point(hand.pts[i ][0],150));
cairo_line_to(cr, Geom::Point(hand.pts[i ][0],450));
cairo_move_to(cr, Geom::Point(hand.pts[i+size][0],150));
cairo_line_to(cr, Geom::Point(hand.pts[i+size][0],450));
}
cairo_move_to(cr, Geom::Point(0,300));
cairo_line_to(cr, Geom::Point(600,300));
cairo_set_line_width (cr, .3);
cairo_set_source_rgba (cr, 0.2, 0.2, 0.2, 1);
cairo_stroke(cr);
SBasis B(size, Linear());
for (unsigned i=0;i<size;i++){
B[i] = Linear(-(hand.pts[i ][1]-300)*std::pow(4.,(int)i),
-(hand.pts[i+size][1]-300)*std::pow(4.,(int)i) );
}
B.normalize();
plot(cr,B,1);
cairo_set_source_rgba (cr, 0., 0., 0.8, 1);
cairo_stroke(cr);
double vtol = exp_rescale(slider.value());
if (vtol<1e-4) vtol=0;
hand.pts[2*size ][X]=150;
hand.pts[2*size+1][X]=150;
hand.pts[2*size+2][X]=150;
hand.pts[2*size+1][Y]=std::max(hand.pts[2*size+1][Y],hand.pts[2*size+2][Y]+2*vtol);
hand.pts[2*size ][Y]=std::max(hand.pts[2*size ][Y],hand.pts[2*size+1][Y]+2*vtol);
vector<Interval> levels;
levels.emplace_back(300-(hand.pts[2*size ][Y]-vtol), 300-(hand.pts[2*size ][Y]+vtol) );
levels.emplace_back(300-(hand.pts[2*size+1][Y]-vtol), 300-(hand.pts[2*size+1][Y]+vtol) );
levels.emplace_back(300-(hand.pts[2*size+2][Y]-vtol), 300-(hand.pts[2*size+2][Y]+vtol) );
for (auto & level : levels) plot_bar(cr,level.middle());
cairo_set_source_rgba( cr, 1., 0., 0., 1);
cairo_stroke(cr);
for (auto & level : levels) plot_bar(cr,level);
cairo_set_source_rgba( cr, 1., 0., 0., .2);
cairo_fill(cr);
cairo_set_source_rgba (cr, 0., 0.5, 0., 1);
*notify<<"Use hand.pts to set the coefficients of the s-basis."<<std::endl;
vector<vector<Interval> > sols=level_sets(B,levels,0,1);
for (unsigned i=0;i<sols.size();i++){
for (unsigned j=0;j<sols[i].size();j++){
Interval ys = levels[i];
ys.expandTo(0.);
cairo_set_line_width (cr, .3);
plot_bar(cr,ys, 1., sols[i][j].min(), sols[i][j].max());
cairo_set_source_rgba( cr, 0., 0., 1., .3);
cairo_fill(cr);
plot_bar(cr,ys, 1., sols[i][j].min(), sols[i][j].max());
cairo_set_source_rgba( cr, 0., 0., 1., .3);
cairo_stroke(cr);
cairo_set_line_width (cr, 1.6);
cairo_set_source_rgba( cr, 0., 0., 1, 1);
plot_bar(cr,0., 1., sols[i][j].min(), sols[i][j].max());
Point sol ( 150 + 300 * sols[i][j].middle(), 300);
draw_cross(cr, sol);
cairo_stroke(cr);
}
}
cairo_set_source_rgba( cr, 0., 0., 1., .5);
cairo_fill(cr);
Toy::draw(cr, notify, width, height, save,timer_stream);
}
public:
BoundsTester(){
size=5;
if(hand.pts.empty()) {
for(unsigned i = 0; i < 2*size; i++)
hand.pts.emplace_back(0,150+150+uniform()*300*0);
}
hand.pts.emplace_back(150,300+ 50+uniform()*100);
hand.pts.emplace_back(150,300- 50+uniform()*100);
hand.pts.emplace_back(150,300-150+uniform()*100);
handles.push_back(&hand);
slider = Slider(-5, 2, 0, 0.5, "tolerance");
slider.geometry(Point(50, 20), 250);
slider.formatter(&exp_formatter);
handles.push_back(&slider);
}
private:
unsigned size;
PointSetHandle hand;
Slider slider;
};
int main(int argc, char **argv) {
init(argc, argv, new BoundsTester);
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:encoding = utf-8:textwidth = 99 :
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