1 files changed, 117 insertions, 0 deletions
diff --git a/src/3rdparty/2geom/src/toys/pw-toy.cpp b/src/3rdparty/2geom/src/toys/pw-toy.cpp
new file mode 100644
index 0000000..93ca8ea
--- /dev/null
+++ b/src/3rdparty/2geom/src/toys/pw-toy.cpp
@@ -0,0 +1,117 @@
+#include <2geom/piecewise.h>
+#include <2geom/sbasis.h>
+#include <2geom/bezier-to-sbasis.h>
+
+#include <toys/path-cairo.h>
+#include <toys/toy-framework-2.h>
+
+#include <vector>
+
+using namespace Geom;
+using namespace std;
+
+void cairo_pw(cairo_t *cr, Piecewise<SBasis> p) {
+    for(unsigned i = 0; i < p.size(); i++) {
+        D2<SBasis> B;
+        B[0] = Linear(p.cuts[i], p.cuts[i+1]);
+        B[1] = Linear(150) + p[i];
+        cairo_d2_sb(cr, B);
+    }
+}
+
+void cairo_horiz(cairo_t *cr, double y, vector<double> p) {
+    for(double i : p) {
+        cairo_move_to(cr, i, y);
+        cairo_rel_line_to(cr, 0, 10);
+    }
+}
+
+void cairo_vert(cairo_t *cr, double x, vector<double> p) {
+    for(double i : p) {
+        cairo_move_to(cr, x, i);
+        cairo_rel_line_to(cr, 10, 0);
+    }
+}
+
+#include "pwsbhandle.cpp"  // FIXME: This looks like it may give problems later, (including a .cpp file)
+
+class PwToy: public Toy {
+    unsigned segs, handles_per_curve, curves;
+    PWSBHandle pwsbh[2];
+    PointHandle interval_test[2];
+    void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream) override {
+        cairo_set_source_rgba (cr, 0., 0., 0., 1);
+        cairo_set_line_width (cr, 1);
+        
+        std::vector<Piecewise<SBasis> > pws(curves);
+        for(unsigned a = 0; a < curves; a++) {
+            pws[a] = pwsbh[a].value();
+            cairo_pw(cr, pws[a]);
+        }
+        cairo_stroke(cr);
+
+        Piecewise<SBasis> pw_out = pws[0] + pws[1];
+
+        cairo_set_source_rgba (cr, 0., 0., .5, 1.);
+        cairo_horiz(cr, 500, pw_out.cuts);
+        cairo_stroke(cr);
+
+        cairo_set_source_rgba (cr, 0., 0., .5, 1.);
+        cairo_pw(cr, pws[0] + pws[1]);
+        cairo_stroke(cr);
+        
+        Interval bs = *bounds_local(pw_out, Interval(interval_test[0].pos[0], 
+                                                    interval_test[1].pos[0]));
+        vector<double> vec;
+        vec.push_back(bs.min() + 150); vec.push_back(bs.max() + 150);
+        cairo_set_source_rgba (cr, .5, 0., 0., 1.);
+        cairo_vert(cr, 100, vec);
+        cairo_stroke(cr);
+
+       /*  Portion demonstration
+        Piecewise<SBasis> pw_out = portion(pws[0], handles[handles.size() - 2][0], handles[handles.size() - 1][0]);
+        cairo_set_source_rgba (cr, 0, .5, 0, .25);
+        cairo_set_line_width(cr, 3);
+        cairo_pw(cr, pw_out);
+        cairo_stroke(cr);
+        */
+
+        *notify << pws[0].segN(interval_test[0].pos[0]) << "; " << pws[0].segT(interval_test[0].pos[0]);
+        Toy::draw(cr, notify, width, height, save,timer_stream);
+    }
+
+    bool should_draw_numbers() override { return false; }
+        
+    public:
+    PwToy () {
+        segs = 3;
+        handles_per_curve = 4 * segs;
+        curves = 2;
+        for(unsigned a = 0; a < curves; a++) {
+            pwsbh[a] = PWSBHandle(4, 3);
+            handles.push_back(&pwsbh[a]);
+            for(unsigned i = 0; i < handles_per_curve; i++)
+                pwsbh[a].push_back(150 + 300*i/(4*segs), uniform() * 150 + 150 - 50 * a);
+        }
+        interval_test[0].pos = Point(150, 400);
+        interval_test[1].pos = Point(300, 400);
+        handles.push_back(&interval_test[0]);
+        handles.push_back(&interval_test[1]);
+    }
+};
+
+int main(int argc, char **argv) {
+    init(argc, argv, new PwToy());
+    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 :