1 files changed, 121 insertions, 0 deletions
diff --git a/jni/feature_stab/db_vlvm/db_utilities_geometry.h b/jni/feature_stab/db_vlvm/db_utilities_geometry.h
new file mode 100644
index 000000000..f21558467
--- /dev/null
+++ b/jni/feature_stab/db_vlvm/db_utilities_geometry.h
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* $Id: db_utilities_geometry.h,v 1.3 2011/06/17 14:03:31 mbansal Exp $ */
+
+#ifndef DB_UTILITIES_GEOMETRY_H
+#define DB_UTILITIES_GEOMETRY_H
+
+#include "db_utilities.h"
+
+
+
+/*****************************************************************
+*    Lean and mean begins here                                   *
+*****************************************************************/
+/*! Get the inhomogenous 2D-point centroid of nr_point inhomogenous
+points in X*/
+inline void db_PointCentroid2D(double c[2],const double *X,int nr_points)
+{
+    int i;
+    double cx,cy,m;
+
+    cx=0;cy=0;
+    for(i=0;i<nr_points;i++)
+    {
+        cx+= *X++;
+        cy+= *X++;
+    }
+    if(nr_points)
+    {
+        m=1.0/((double)nr_points);
+        c[0]=cx*m;
+        c[1]=cy*m;
+    }
+    else c[0]=c[1]=0;
+}
+
+inline void db_PointCentroid2D(double c[2],const double * const *X,int nr_points)
+{
+    int i;
+    double cx,cy,m;
+    const double *temp;
+
+    cx=0;cy=0;
+    for(i=0;i<nr_points;i++)
+    {
+        temp= *X++;
+        cx+=temp[0];
+        cy+=temp[1];
+    }
+    if(nr_points)
+    {
+        m=1.0/((double)nr_points);
+        c[0]=cx*m;
+        c[1]=cy*m;
+    }
+    else c[0]=c[1]=0;
+}
+
+/*! Get the inhomogenous 3D-point centroid of nr_point inhomogenous
+points in X*/
+inline void db_PointCentroid3D(double c[3],const double *X,int nr_points)
+{
+    int i;
+    double cx,cy,cz,m;
+
+    cx=0;cy=0;cz=0;
+    for(i=0;i<nr_points;i++)
+    {
+        cx+= *X++;
+        cy+= *X++;
+        cz+= *X++;
+    }
+    if(nr_points)
+    {
+        m=1.0/((double)nr_points);
+        c[0]=cx*m;
+        c[1]=cy*m;
+        c[2]=cz*m;
+    }
+    else c[0]=c[1]=c[2]=0;
+}
+
+inline void db_PointCentroid3D(double c[3],const double * const *X,int nr_points)
+{
+    int i;
+    double cx,cy,cz,m;
+    const double *temp;
+
+    cx=0;cy=0;cz=0;
+    for(i=0;i<nr_points;i++)
+    {
+        temp= *X++;
+        cx+=temp[0];
+        cy+=temp[1];
+        cz+=temp[2];
+    }
+    if(nr_points)
+    {
+        m=1.0/((double)nr_points);
+        c[0]=cx*m;
+        c[1]=cy*m;
+        c[2]=cz*m;
+    }
+    else c[0]=c[1]=c[2]=0;
+}
+
+#endif /* DB_UTILITIES_GEOMETRY_H */