X-Git-Url: http://gitweb.pgornicz.com/gitweb.cgi?a=blobdiff_plain;f=src%2FEffects%2FGravity.cpp;h=5c654519f09e55138e02b7718b17cad47d080c04;hb=3d1f081343dc603a3292538eeb9bd794b255deb6;hp=d7852d38d623987063b877fe4076ffed3ee16dfd;hpb=ec70635e518dbd916303ec7d5ffa5e9b99bde565;p=physics.git

diff --git a/src/Effects/Gravity.cpp b/src/Effects/Gravity.cpp
index d7852d3..5c65451 100644
--- a/src/Effects/Gravity.cpp
+++ b/src/Effects/Gravity.cpp
@@ -1,5 +1,30 @@
+/*
+ *  Copyright (C) 2008 Patrik Gornicz, Gornicz_P (at) hotmail (dot) com.
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include "Gravity.h"
 
+#include "Entities/PhysicsEntity.h"
+
+/// ***** Private Variables *****
+
+float forceGravity = 0.001;
+
+/// ***** Constructors/Destructors *****
+
 Gravity::Gravity()
 {
 
@@ -9,17 +34,9 @@ Gravity::~Gravity()
 
 }
 
-Vector2 Gravity::positionDelta(const PhysicsEntity*, float)
-{
-    return Vector2(0, 0);
-}
-
-Vector2 Gravity::velocityDelta(const PhysicsEntity*, float)
-{
-    return Vector2(0, 0);
-}
+/// ***** Public Class Methods *****
 
-Vector2 Gravity::forceDelta(const PhysicsEntity*, float)
+Vector2 Gravity::forceDelta(const PhysicsEntity* e, float) const
 {
-    return Vector2(0, 0.000001);
+    return Vector2(0, e->mass * forceGravity);
 }