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/BoundingVolumeSphere3.h

@@ -0,0 +1,53 @@
+#ifndef BOUNDINGVOLUMESPHERE_H
+#define BOUNDINGVOLUMESPHERE_H
+
+#include "BoundingVolume.h"
+#include "../Sphere3.h"
+#include "../Point3.h"
+
+class BoundingVolumeSphere3 : public BoundingVolume, public Sphere3 {
+
+public:
+
+	BoundingVolumeSphere3() {;}
+
+	BoundingVolumeSphere3(const Sphere3& s) : Sphere3(s) {;}
+
+	float getVolumeSize() const  {
+		return (4.0f / 3.0f) * M_PI * (radius*radius*radius);
+	}
+
+	bool contains(const Point3 p) const  {
+		return Sphere3::contains(p);
+	}
+
+	bool intersects(const Ray3& ray) const  {
+		return Sphere3::intersects(ray);
+	}
+
+	/** does the volume intersect with the given volume? */
+	bool intersects(const BoundingVolume& other) const  {
+		const BoundingVolumeSphere3& sphere = (const BoundingVolumeSphere3&) other;
+		return Sphere3::intersects(sphere);
+	}
+
+	/** does the volume contain the given volume? */
+	bool contains(const BoundingVolume& other) const {
+		const BoundingVolumeSphere3& sphere = (const BoundingVolumeSphere3&) other;
+		return Sphere3::contains(sphere);
+	}
+
+	/** construct a volume around the given point-set */
+	static BoundingVolumeSphere3 fromVertices(const std::vector<Point3>& verts) {
+		BoundingVolumeSphere3 bvs;
+		bvs.adjustToPointSet(verts);
+		return bvs;
+	}
+
+	static BoundingVolumeSphere3 join(const BoundingVolumeSphere3 a, const BoundingVolumeSphere3 b) {
+		return BoundingVolumeSphere3(Sphere3::join(a, b));
+	}
+
+};
+
+#endif // BOUNDINGVOLUMESPHERE_H