1 files changed, 67 insertions, 0 deletions
diff --git a/chalk/core/kis_vec.cc b/chalk/core/kis_vec.cc
new file mode 100644
index 00000000..fa54e1f9
--- /dev/null
+++ b/chalk/core/kis_vec.cc
@@ -0,0 +1,67 @@
+/*
+ *  kis_vec.cc - part of KImageShop
+ *
+ *  Copyright (c) 1999 Matthias Elter <me@kde.org>
+ *
+ *  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 2 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, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "kis_vec.h"
+
+KisVector2D& KisVector2D::normalize()
+{
+    double length, ilength;
+  
+    length = m_x*m_x + m_y*m_y;
+    length = sqrt (length);
+  
+    if (length > epsilon)
+    {
+        ilength = 1/length;
+        m_x *= ilength;
+        m_y *= ilength;
+    }
+    return *this;
+}
+
+KisVector3D& KisVector3D::normalize()
+{
+    double length, ilength;
+  
+    length = m_x*m_x + m_y*m_y + m_z*m_z;
+    length = sqrt (length);
+  
+    if (length > epsilon)
+    {
+        ilength = 1/length;
+        m_x *= ilength;
+        m_y *= ilength;
+        m_z *= ilength;
+    }
+    return *this;
+}
+
+KisVector3D& KisVector3D::crossProduct(const KisVector3D &v)
+{
+    double x,y,z;
+  
+    x = m_y*v.m_z - m_z*v.m_y;
+    y = m_z*v.m_x - m_x*v.m_z;
+    z = m_x*v.m_y - m_y*v.m_x;
+    m_x=x; m_y=y; m_z=z;
+  
+    return *this;
+}
+