1 files changed, 67 insertions, 0 deletions
diff --git a/src/toys/self-intersect.cpp b/src/toys/self-intersect.cpp
new file mode 100644
index 0000000..840e058
--- /dev/null
+++ b/src/toys/self-intersect.cpp
@@ -0,0 +1,67 @@
+#include <2geom/basic-intersection.h>
+#include <2geom/d2.h>
+#include <2geom/sbasis.h>
+#include <2geom/sbasis-2d.h>
+#include <2geom/bezier-to-sbasis.h>
+
+#include <toys/path-cairo.h>
+#include <toys/toy-framework-2.h>
+
+using std::vector;
+using namespace Geom;
+
+class SelfIntersect: public Toy {
+    PointSetHandle psh;
+void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream) override {
+    cairo_set_line_width (cr, 0.5);
+    cairo_set_source_rgba (cr, 0., 0., 0, 1);
+    
+    D2<SBasis> A = psh.asBezier();
+    //Rect Ar = *bounds_fast(A);
+    cairo_d2_sb(cr, A);
+    cairo_stroke(cr);
+
+    std::vector<std::pair<double, double> >  all_si;
+    
+    find_self_intersections(all_si, A);
+    
+    cairo_stroke(cr);
+    cairo_set_source_rgba (cr, 1., 0., 1, 1);
+    for(auto & i : all_si) {
+        draw_handle(cr, A(i.first));
+    }
+    cairo_stroke(cr);
+    
+    *notify << "total intersections: " << all_si.size();
+
+    Toy::draw(cr, notify, width, height, save,timer_stream);
+}
+public:
+SelfIntersect (unsigned bez_ord) {
+    handles.push_back(&psh);
+    for(unsigned i = 0; i < bez_ord; i++)
+        psh.push_back(uniform()*400, uniform()*400);
+}
+};
+
+int main(int argc, char **argv) {   
+    unsigned bez_ord=5;
+    if(argc > 1)
+        sscanf(argv[1], "%d", &bez_ord);
+    init(argc, argv, new SelfIntersect(bez_ord));
+
+    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 :