1 files changed, 98 insertions, 0 deletions
diff --git a/src/toys/pw-compose-test.cpp b/src/toys/pw-compose-test.cpp
new file mode 100644
index 0000000..a7e9438
--- /dev/null
+++ b/src/toys/pw-compose-test.cpp
@@ -0,0 +1,98 @@
+#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>
+
+using namespace Geom;
+
+class PwToy: public Toy {
+public:
+    vector<PointSetHandle*> pw_handles;
+    PointSetHandle slids;
+    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., 0.5, 0, 1);
+        cairo_set_line_width (cr, 1);
+       
+        D2<Piecewise<SBasis> > pws;
+        for(unsigned i = 0; i < pw_handles.size(); i++) {
+            D2<SBasis> foo = pw_handles[i]->asBezier();
+            cairo_d2_sb(cr, foo);
+            for(unsigned d = 0; d < 2; d++) {
+                pws[d].cuts.push_back(150*i);
+                pws[d].segs.push_back(foo[d]);
+            }
+        }
+        for(unsigned d = 0; d < 2; d++)
+            pws[d].cuts.push_back(150*pw_handles.size());
+        
+        slids.pts[0][1]=450;
+        slids.pts[1][1]=450;
+        slids.pts[2][1]=450;
+        slids.pts[3][1]=450;
+	
+        cairo_set_source_rgba (cr, 0.2, 0.2, 0.2, 1);
+        D2<SBasis> foo = slids.asBezier();
+        SBasis g = foo[0] - Linear(150);
+        cairo_d2_sb(cr, foo);
+	    for(unsigned i=0;i<20;i++){
+            double t=i/20.;
+            draw_handle(cr, foo(t));
+        }
+        cairo_stroke(cr);
+        foo[1]=foo[0];
+        foo[0]=Linear(150,450);
+        cairo_d2_sb(cr, foo);
+
+        cairo_d2_pw_sb(cr, pws);
+        
+        cairo_stroke(cr);
+        cairo_set_source_rgba (cr, 0.9, 0., 0., 1);
+        D2<Piecewise<SBasis> > res = compose(pws, Piecewise<SBasis>(g));
+        cairo_d2_pw_sb(cr, res);
+        for(unsigned i=0;i<20;i++){
+            double t=(res[0].cuts.back()-res[0].cuts.front())*i/20.;
+            draw_handle(cr, Point(res[0](t),res[1](t)));
+        }
+        cairo_stroke(cr);
+
+        Toy::draw(cr, notify, width, height, save,timer_stream);
+    }
+
+    bool should_draw_numbers() override { return false; }
+        
+    public:
+    PwToy () {
+        unsigned segs = 5;
+        unsigned handles_per_seg = 4;
+        double x = 150;
+        for(unsigned a = 0; a < segs; a++) {
+            PointSetHandle* psh = new PointSetHandle;
+            
+            for(unsigned i = 0; i < handles_per_seg; i++, x+= 25)
+                psh->push_back(Point(x, uniform() * 150));
+            pw_handles.push_back(psh);
+            handles.push_back(psh);
+        }
+        for(unsigned i = 0; i < 4; i++)
+            slids.push_back(Point(150 + segs*50*i,100));
+        handles.push_back(&slids);
+    }
+};
+
+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 :