1 files changed, 67 insertions, 0 deletions
diff --git a/src/toys/circle-line-intersect.cpp b/src/toys/circle-line-intersect.cpp
new file mode 100644
index 0000000..3946ca1
--- /dev/null
+++ b/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 :