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#include <2geom/cairo-path-sink.h>
#include <2geom/ellipse.h>
#include <2geom/line.h>
#include <2geom/polynomial.h>
#include <toys/toy-framework-2.h>
using namespace Geom;
class CircleIntersect : public Toy {
PointSetHandle eh, bh;
void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream) override {
Rect all(Point(0,0), Point(width, height));
double rx = Geom::distance(eh.pts[0], eh.pts[1]);
double ry = Geom::distance(eh.pts[0], eh.pts[2]);
double rot = Geom::atan2(eh.pts[1] - eh.pts[0]);
Ellipse e(eh.pts[0], Point(rx, ry), rot);
D2<Bezier> b(bh.pts);
cairo_set_line_width(cr, 1.0);
Geom::CairoPathSink cps(cr);
// draw Bezier control polygon
cairo_set_source_rgba(cr, 0, 0, 1, 0.3);
cps.moveTo(bh.pts[0]);
for (unsigned i = 1; i < bh.pts.size(); ++i) {
cps.lineTo(bh.pts[i]);
}
cairo_stroke(cr);
// draw Bezier curve and ellipse
cairo_set_source_rgb(cr, 0, 0, 0);
cps.feed(BezierCurve(b), true);
cps.feed(e);
cairo_stroke(cr);
std::vector<ShapeIntersection> result = e.intersect(b);
cairo_set_source_rgb(cr, 1, 0, 0);
for (auto & i : result) {
draw_handle(cr, i.point());
}
cairo_stroke(cr);
Toy::draw(cr, notify, width, height, save,timer_stream);
}
public:
CircleIntersect(){
eh.push_back(300,300); eh.push_back(450,150); eh.push_back(250, 350);
bh.push_back(100,100); bh.push_back(500,100); bh.push_back(100,500); bh.push_back(500,500);
handles.push_back(&eh);
handles.push_back(&bh);
}
};
int main(int argc, char **argv) {
init(argc, argv, new CircleIntersect());
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 :
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