worked on 2D/3D raytracing

adjusted BVH
improved 2D/3D BVH
new bounding volumes
new test cases
renamed some test-cases for grouping reasons
made GPC header-only using slight adjustments

geo/volume/BoundingVolumeAABB3.h

@@ -0,0 +1,30 @@
+#ifndef BOUNDINGVOLUMEBOX_H
+#define BOUNDINGVOLUMEBOX_H
+
+#include "BoundingVolume.h"
+#include "../Point3.h"
+
+class BoundingVolumeAABB : public BoundingVolume {
+
+	static constexpr float MAX = +99999;
+	static constexpr float MIN = -99999;
+
+	/** minimum */
+	Point3 p1;
+
+	/** maximum */
+	Point3 p2;
+
+public:
+
+	/** empty ctor */
+	BoundingVolumeAABB() : p1(MAX,MAX,MAX), p2(MIN,MIN,MIN) {;}
+
+	float getVolumeSize() const  {
+		return (p2.x-p1.x) * (p2.y-p1.y) * (p2.z-p1.z);
+	}
+
+
+};
+
+#endif // BOUNDINGVOLUMEBOX_H