added tests for BoundingSphere class

Tests/GeoLib/TestBoundingSphere.cpp

+/**
+ * \file   TestBoundingSphere.cpp
+ * \author Karsten Rink
+ * \date   2014-08-29
+ *
+ * \copyright
+ * Copyright (c) 2013, OpenGeoSys Community (http://www.opengeosys.org)
+ *            Distributed under a Modified BSD License.
+ *              See accompanying file LICENSE.txt or
+ *              http://www.opengeosys.org/project/license
+ *
+ *
+ */
+
+#include "gtest/gtest.h"
+
+#include "GeoLib/BoundingSphere.h"
+#include "GeoLib/Point.h"
+
+TEST(GeoLib, TestBoundingSphere)
+{
+    GeoLib::Point a(0,  0   ,0);
+	GeoLib::Point b(2,  0   ,0);
+	GeoLib::Point c(1,  0.1 ,0);
+	GeoLib::Point d(1, -0.1 ,0);
+    std::vector<GeoLib::Point*> pnts;
+    pnts.push_back(new GeoLib::Point(0,  0   , 0));
+    pnts.push_back(new GeoLib::Point(2,  0   , 0));
+    pnts.push_back(new GeoLib::Point(1,  0.1 , 0));
+    pnts.push_back(new GeoLib::Point(1, -0.1 , 0));
+
+    {
+    GeoLib::BoundingSphere s(pnts);
+	GeoLib::Point center = s.getCenter();
+    ASSERT_NEAR(1.0, center[0], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(0.0, center[1], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(0.0, center[2], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(1.0, s.getRadius(), std::numeric_limits<double>::epsilon());
+    }
+
+    {
+    (*pnts[2])[2] -= 1.4;
+    GeoLib::BoundingSphere s(pnts);
+	GeoLib::Point center = s.getCenter();
+    ASSERT_NEAR(1.0, center[0], 0.0001);
+    ASSERT_NEAR(0.0246, center[1], 0.0001);
+    ASSERT_NEAR(-0.3446, center[2], 0.0001);
+    ASSERT_NEAR(1.0580, s.getRadius(), 0.0001);
+    }
+    
+    pnts[0] = new GeoLib::Point(0, 0, 0);
+    pnts[1] = new GeoLib::Point(1, 0, 0);
+    pnts[2] = new GeoLib::Point(1, 1, 0);
+    pnts[3] = new GeoLib::Point(0, 1, 0);
+    pnts.push_back(new GeoLib::Point(0, 0, 1));
+    pnts.push_back(new GeoLib::Point(1, 0, 1));
+    pnts.push_back(new GeoLib::Point(1, 1, 1));
+    pnts.push_back(new GeoLib::Point(0, 1, 0.9));
+
+    {
+    GeoLib::BoundingSphere s(pnts);
+	GeoLib::Point center = s.getCenter();
+    ASSERT_NEAR(0.5, center[0], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(0.5, center[1], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(0.5, center[2], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(0.8660, s.getRadius(), 0.0001);
+    }
+
+    {
+    (*pnts[7])[2] += 0.3;
+    GeoLib::BoundingSphere s(pnts);
+	GeoLib::Point center = s.getCenter();
+    ASSERT_NEAR(0.5, center[0], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(0.5, center[1], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(0.6, center[2], std::numeric_limits<double>::epsilon());
+    ASSERT_NEAR(0.9273, s.getRadius(), 0.0001);
+    }
+}