X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=polygon.cc;h=9e55d80e179396cce8b7fa084c4938f37c15f022;hb=3ea65d15a33cd73c71c0f9af0cc5d882ebd12265;hp=2ae238d3c1c39010c56da46953988655bfca6e58;hpb=3e51d77116e49ba279a6cbbf1dbbc893c4117eb4;p=universe.git

diff --git a/polygon.cc b/polygon.cc
index 2ae238d..9e55d80 100644
--- a/polygon.cc
+++ b/polygon.cc
@@ -47,6 +47,7 @@ Polygon *Polygon::clone() {
   return new Polygon(_mass, _red, _green, _blue, _relative_x, _relative_y, _nb_vertices);
 }
 
+#ifdef XFIG_SUPPORT
 void Polygon::color_xfig(XFigTracer *tracer) {
   tracer->add_color(int(255 * _red), int(255 * _green), int(255 * _blue));
 }
@@ -55,7 +56,9 @@ void Polygon::print_xfig(XFigTracer *tracer) {
   tracer->draw_polygon(int(255 * _red), int(255 * _green), int(255 * _blue),
                        _nb_vertices, _x, _y);
 }
+#endif
 
+#ifdef X11_SUPPORT
 void Polygon::draw(SimpleWindow *window) {
   window->color(_red, _green, _blue);
   int x[_nb_vertices], y[_nb_vertices];
@@ -73,8 +76,21 @@ void Polygon::draw_contours(SimpleWindow *window) {
     y[n] = int(_y[n]);
   }
   window->color(0.0, 0.0, 0.0);
-  for(int n = 0; n < _nb_vertices; n++)
+  // window->color(1.0, 1.0, 1.0);
+  for(int n = 0; n < _nb_vertices; n++) {
     window->draw_line(x[n], y[n], x[(n+1)%_nb_vertices], y[(n+1)%_nb_vertices]);
+  }
+}
+#endif
+
+void Polygon::draw(Canvas *canvas) {
+  canvas->set_drawing_color(_red, _green, _blue);
+  canvas->draw_polygon(1, _nb_vertices, _x, _y);
+}
+
+void Polygon::draw_contours(Canvas *canvas) {
+  canvas->set_drawing_color(0.0, 0.0, 0.0);
+  canvas->draw_polygon(0, _nb_vertices, _x, _y);
 }
 
 void Polygon::set_vertex(int k, scalar_t x, scalar_t y) {
@@ -179,7 +195,9 @@ void Polygon::initialize(int nb_polygons) {
 
   _nb_polygons = nb_polygons;
 
-  a = _relative_x[_nb_vertices - 1] * _relative_y[0] - _relative_x[0] * _relative_y[_nb_vertices - 1];
+  a = _relative_x[_nb_vertices - 1] * _relative_y[0]
+    - _relative_x[0] * _relative_y[_nb_vertices - 1];
+
   for(int n = 0; n < _nb_vertices - 1; n++)
     a += _relative_x[n] * _relative_y[n+1] - _relative_x[n+1] * _relative_y[n];
   a *= 0.5;
@@ -489,4 +507,3 @@ bool Polygon::collide(Polygon *p) {
 
   return false;
 }
-