1 files changed, 105 insertions, 0 deletions
diff --git a/src/3rdparty/2geom/src/toys/portion-test.cpp b/src/3rdparty/2geom/src/toys/portion-test.cpp
new file mode 100644
index 0000000..bc64db3
--- /dev/null
+++ b/src/3rdparty/2geom/src/toys/portion-test.cpp
@@ -0,0 +1,105 @@
+#include <2geom/d2.h>
+#include <2geom/sbasis.h>
+#include <2geom/sbasis-2d.h>
+#include <2geom/bezier-to-sbasis.h>
+#include <2geom/sbasis-geometric.h>
+
+#include <toys/path-cairo.h>
+#include <toys/toy-framework-2.h>
+
+#include <time.h>
+using std::vector;
+using namespace Geom;
+using namespace std;
+
+// TODO: 
+// use path2
+// replace Ray stuff with path2 line segments.
+
+//-----------------------------------------------
+
+class PortionTester: public Toy {
+    PointSetHandle curve_handle;
+    PointHandle sample_point1, sample_point2;
+    std::vector<Toggle> toggles;
+    void mouse_pressed(GdkEventButton* e) override {
+        toggle_events(toggles, e);
+        Toy::mouse_pressed(e);
+    }
+    void draw(cairo_t *cr, std::ostringstream *notify, int width, int height, bool save, std::ostringstream *timer_stream) override {
+    
+        draw_toggles(cr, toggles);
+        D2<SBasis> B = curve_handle.asBezier();
+        
+        cairo_set_line_width (cr, 1);
+        cairo_set_source_rgba (cr, 0., 0.5, 0., 1);
+        cairo_d2_sb(cr, B);
+        cairo_stroke(cr);
+
+	sample_point1.pos[1]=400;
+	sample_point1.pos[0]=std::max(150.,sample_point1.pos[0]);
+	sample_point1.pos[0]=std::min(450.,sample_point1.pos[0]);
+	sample_point2.pos[1]=400;
+	sample_point2.pos[0]=std::max(150.,sample_point2.pos[0]);
+	sample_point2.pos[0]=std::min(450.,sample_point2.pos[0]);
+	cairo_move_to(cr, Geom::Point(150,400));
+	cairo_line_to(cr, Geom::Point(450,400));
+	cairo_set_source_rgba (cr, 0., 0., 0.5, 0.8);
+	cairo_stroke(cr);
+
+	double t0=std::max(0.,std::min(1.,(sample_point1.pos[0]-150)/300.));
+	double t1=std::max(0.,std::min(1.,(sample_point2.pos[0]-150)/300.));
+        
+        Path P;
+        P.append(B);
+        
+        if (toggles[0].on) {
+            if (toggles[1].on)
+                cairo_curve(cr, P.portion(t0,t1)[0]);
+            else
+                cairo_path(cr, P.portion(t0,t1));
+        } else
+            cairo_d2_sb(cr, portion(B,t0,t1));
+        
+        
+	cairo_set_source_rgba (cr, 0.5, 0.2, 0., 0.8);
+	cairo_stroke(cr);
+        Toy::draw(cr, notify, width, height, save,timer_stream);
+    }        
+  
+public:
+    PortionTester(){
+        toggles.emplace_back("Path", true);
+        toggles[0].bounds = Rect(Point(10,100), Point(100, 130));
+        toggles.emplace_back("Curve", true);
+        toggles[1].bounds = Rect(Point(10,130), Point(100, 160));
+        if(handles.empty()) {
+            handles.push_back(&curve_handle);
+            handles.push_back(&sample_point1);
+            handles.push_back(&sample_point2);
+            for(unsigned i = 0; i < 4; i++)
+                curve_handle.push_back(150+uniform()*300,150+uniform()*300);
+            sample_point1.pos = Geom::Point(250,300);
+            sample_point2.pos = Geom::Point(350,300);
+        }
+    }
+};
+
+int main(int argc, char **argv) {
+    std::cout << "testing unit_normal(multidim_sbasis) based offset." << std::endl;
+    init(argc, argv, new PortionTester);
+    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:expandtab:shiftwidth = 4:tabstop = 8:softtabstop = 4:encoding = utf-8:textwidth = 99 :
+
+