added ball to ball collisions

[physics.git] / src / Vector2.h

diff --git a/src/Vector2.h b/src/Vector2.h
index d2bc2a0..13ffd88 100644 (file)
--- a/src/Vector2.h
+++ b/src/Vector2.h
@@ -1,3 +1,20 @@
+/*
+ *  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/>.
+ */
+
 #ifndef VECTOR2_H
 #define VECTOR2_H
 
@@ -15,12 +32,16 @@ class Vector2
     Vector2();
     Vector2(float, float);
     Vector2(const Vector2&);
+    ~Vector2();
 
     void zero();
     void unit();
 
     float angle() const;
     float length() const;
+    float sqrLength() const;
+
+    float dot(const Vector2&) const;
 
     Vector2 add(const Vector2&) const;
     Vector2 subtract(const Vector2&) const;
@@ -32,8 +53,10 @@ class Vector2
 };
 
 /// ***** Header Methods *****
-// definitions of the operators are external
-// because (float, Vector2) would fail inside class
+
+// definitions of the operators are external because (float, Vector2) would
+// fail inside the class
+
 Vector2 operator+(const Vector2&, const Vector2&);
 Vector2 operator-(const Vector2&, const Vector2&);
 Vector2 operator*(float, const Vector2&);