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Diffstat (limited to 'src/toys/filet-minion.cpp')
| -rw-r--r-- | src/toys/filet-minion.cpp | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/src/toys/filet-minion.cpp b/src/toys/filet-minion.cpp new file mode 100644 index 0000000..e94e354 --- /dev/null +++ b/src/toys/filet-minion.cpp @@ -0,0 +1,159 @@ +#include <iostream> +#include <2geom/path.h> +#include <2geom/svg-path-parser.h> +#include <2geom/path-intersection.h> +#include <2geom/basic-intersection.h> +#include <2geom/pathvector.h> +#include <2geom/exception.h> +#include <2geom/sbasis-geometric.h> +#include <2geom/path-intersection.h> +#include <2geom/nearest-time.h> +#include <2geom/circle.h> + +#include <cstdlib> +#include <map> +#include <vector> +#include <algorithm> + +#include <toys/path-cairo.h> +#include <toys/toy-framework-2.h> +#include <2geom/bezier-to-sbasis.h> +#include <2geom/ord.h> +using namespace Geom; +using namespace std; + +class IntersectDataTester: public Toy { + int nb_paths; + int nb_curves_per_path; + int degree; + + std::vector<PointSetHandle> paths_handles; + std::vector<Slider> sliders; + + void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream) override { + cairo_set_source_rgba (cr, 0., 0., 0, 1); + cairo_set_line_width (cr, 1); + + std::vector<D2<SBasis> > pieces; + PathVector paths; + for (int i = 0; i < nb_paths; i++){ + paths.push_back(Path(paths_handles[i].pts[0])); + for (unsigned j = 0; j+degree < paths_handles[i].size(); j+=degree){ + D2<SBasis> c = handles_to_sbasis(paths_handles[i].pts.begin()+j, degree); + paths[i].append(c); + pieces.push_back(c); + } + } + + cairo_path(cr, paths); + cairo_set_source_rgba (cr, 0., 0., 0, 1); + cairo_set_line_width (cr, 1); + cairo_stroke(cr); + double r = sliders[0].value(); + + D2<SBasis> B = pieces[0]; + Piecewise<D2<SBasis> > offset_curve0 = Piecewise<D2<SBasis> >(pieces[0])+rot90(unitVector(derivative(pieces[0])))*(-r); + Piecewise<D2<SBasis> > offset_curve1 = Piecewise<D2<SBasis> >(pieces[1])+rot90(unitVector(derivative(pieces[1])))*(-r); + + //cairo_pw_d2_sb(cr, offset_curve0); + //cairo_pw_d2_sb(cr, offset_curve1); + //cairo_stroke(cr); + + + Path p0 = path_from_piecewise(offset_curve0, 0.1)[0]; + Path p1 = path_from_piecewise(offset_curve1, 0.1)[0]; + Crossings cs = crossings(p0, p1); + + + for(auto & c : cs) { + *notify << c.ta << ", " << c.tb << '\n'; + Point cp =p0(c.ta); + //draw_circ(cr, cp); + //cairo_stroke(cr); + double p0pt = nearest_time(cp, pieces[0]); + double p1pt = nearest_time(cp, pieces[1]); + Circle circ(cp[0], cp[1], r); + //cairo_arc(cr, circ.center(X), circ.center(Y), circ.ray(), 0, 2*M_PI); + + std::unique_ptr<EllipticalArc> eap( + circ.arc(pieces[0](p0pt), pieces[0](1), pieces[1](p1pt)) ); + D2<SBasis> easb = eap->toSBasis(); + cairo_d2_sb(cr, easb); + cairo_stroke(cr); + } + + Point ends[2]; + if (0) + for(int endi = 0; endi < 2; endi++) { + D2<SBasis> dist = pieces[endi]-pieces[0].at1(); + *notify << dist << "\n"; + vector<double> locs = roots(dot(dist,dist) - SBasis(r*r)); + for(double loc : locs) { + //draw_circ(cr, pieces[endi](locs[i])); + *notify << loc << ' '; + } + if(locs.size()) { + std::sort(locs.begin(), locs.end()); + if (endi) + ends[endi] = pieces[endi](locs[0]); + else + ends[endi] = pieces[endi](locs.back()); + draw_circ(cr, ends[endi]); + } + } + + Toy::draw(cr, notify, width, height, save, timer_stream); + } + + public: + IntersectDataTester(int paths, int curves_in_path, int degree) : + nb_paths(paths), nb_curves_per_path(curves_in_path), degree(degree) { + for (int i = 0; i < nb_paths; i++){ + paths_handles.emplace_back(); + } + for(int i = 0; i < nb_paths; i++){ + for(int j = 0; j < (nb_curves_per_path*degree)+1; j++){ + paths_handles[i].push_back(uniform()*400, 100+ uniform()*300); + } + handles.push_back(&paths_handles[i]); + } + sliders.emplace_back(0.0, 100.0, 1, 30.0, "min radius"); + sliders.emplace_back(0.0, 100.0, 1, 0.0, "ray chooser"); + sliders.emplace_back(0.0, 100.0, 1, 0.0, "area chooser"); + handles.push_back(&(sliders[0])); + handles.push_back(&(sliders[1])); + handles.push_back(&(sliders[2])); + sliders[0].geometry(Point(50, 20), 250); + sliders[1].geometry(Point(50, 50), 250); + sliders[2].geometry(Point(50, 80), 250); + } + + void first_time(int /*argc*/, char** /*argv*/) override { + + } +}; + +int main(int argc, char **argv) { + unsigned paths=1; + unsigned curves_in_path=2; + unsigned degree=3; + if(argc > 3) + sscanf(argv[3], "%d", °ree); + if(argc > 2) + sscanf(argv[2], "%d", &curves_in_path); + if(argc > 1) + sscanf(argv[1], "%d", &paths); + init(argc, argv, new IntersectDataTester(paths, curves_in_path, degree)); + 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=4:softtabstop=4:fileencoding=utf-8:textwidth=99 : |