X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?p=flatland.git;a=blobdiff_plain;f=universe.cc;h=ad3ebf7356cfa3c6a2d425e36102581132b65923;hp=2b1383d3f7b1459ec619b4b37e0226e8d5172a27;hb=90d1c5704c30e7f1d041e32eacbc2893741110e1;hpb=26abc735ca75a78974c7ced091035e8c27ca1c00

diff --git a/universe.cc b/universe.cc
index 2b1383d..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;
@@ -122,11 +127,13 @@ void Universe::compute_pseudo_collisions(int nb_axis, int *nb_colliding_axis) {
   }
 }
 
-bool Universe::update(scalar_t dt) {
+bool Universe::update(scalar_t dt, scalar_t padding) {
   bool result = false;
   apply_collision_forces(dt);
   for(int n = 0; n < _nb_polygons; n++) if(_polygons[n]) {
-    _polygons[n]->apply_border_forces(dt, _width, _height);
+      _polygons[n]->apply_border_forces(dt,
+                                        padding, padding,
+                                        _width - padding, _height - padding);
     result |= _polygons[n]->update(dt);
   }
   return result;
@@ -152,6 +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];