diff options
Diffstat (limited to '')
-rw-r--r-- | src/3rdparty/2geom/src/toys/circle-line-intersect.cpp | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/3rdparty/2geom/src/toys/circle-line-intersect.cpp b/src/3rdparty/2geom/src/toys/circle-line-intersect.cpp new file mode 100644 index 0000000..3946ca1 --- /dev/null +++ b/src/3rdparty/2geom/src/toys/circle-line-intersect.cpp @@ -0,0 +1,67 @@ +#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 : |