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#include <2geom/circle.h>
#include <toys/toy-framework-2.h>
using namespace Geom;
class CircleIntersect : public Toy {
PointSetHandle psh[2];
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 r = Geom::distance(psh[0].pts[0], psh[0].pts[1]);
Circle circ(psh[0].pts[0], r);
Line line(psh[1].pts[0], psh[1].pts[1]);
std::vector<ShapeIntersection> result = circ.intersect(line);
cairo_set_line_width(cr, 1.0);
// draw the shapes
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_arc(cr, circ.center(X), circ.center(Y), circ.radius(), 0, 2*M_PI);
draw_line(cr, line, all);
cairo_stroke(cr);
// draw intersection points
cairo_set_source_rgb(cr, 1, 0, 0);
for (auto & i : result) {
draw_handle(cr, i.point());
}
cairo_stroke(cr);
// show message
if (!result.empty()) {
for (auto & i : result) {
*notify << i.point() << ", ";
}
} else {
*notify << "No intersection";
}
Toy::draw(cr, notify, width, height, save,timer_stream);
}
public:
CircleIntersect(){
psh[0].push_back(200,200); psh[0].push_back(250,200);
psh[1].push_back(150,150); psh[1].push_back(250,150);
handles.push_back(&psh[0]);
handles.push_back(&psh[1]);
}
};
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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