X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?p=flatland.git;a=blobdiff_plain;f=universe.cc;h=ad3ebf7356cfa3c6a2d425e36102581132b65923;hp=b897d0ca475548249d627cfc8f991d850907dfd2;hb=90d1c5704c30e7f1d041e32eacbc2893741110e1;hpb=2cd32038873961c8ff3861efb218fad75fbcbf69

diff --git a/universe.cc b/universe.cc
index b897d0c..ad3ebf7 100644
--- a/universe.cc
+++ b/universe.cc
@@ -62,6 +62,11 @@ void Universe::add_polygon(Polygon *p) {
   }
 }
 
+bool Universe::collide_with_borders(Polygon *p, scalar_t padding) {
+  return p->collide_with_borders(padding, padding,_width - padding, _height - padding);
+
+}
+
 bool Universe::collide(Polygon *p) {
   for(int n = 0; n < _nb_polygons; n++)
     if(_polygons[n] && _polygons[n]->collide(p)) return true;
@@ -154,6 +159,14 @@ void Universe::draw(Canvas *canvas) {
   }
 }
 
+void Universe::apply_gravity(scalar_t dt, scalar_t fx, scalar_t fy) {
+  for(int n = 0; n < _nb_polygons; n++)
+    if(_polygons[n])
+      _polygons[n]->apply_force(dt,
+                                _polygons[n]->_center_x, _polygons[n]->_center_y,
+                                fx, fy);
+}
+
 void Universe::apply_collision_forces(scalar_t dt) {
   const int nb_axis = 2;
   int nb_collision[_nb_polygons * _nb_polygons];