Restructuring for OpenSpace tests

- Moved all OpenSpace headers to separate include directory
- Added OpenSpaceTests binary with OPENSPACE_HAVE_TESTS define
- Added CMake setting of BASE_DIR
- Added OpenSpace initial tests for SceneGraph and SceneGraphNodes
- Added OpenSpace initial tests for psc and pss
- Restructured OpenSpace so no GL functions are called in constructors
to make the classes testable

- Todo: Make the base dir possible to set through command line argument
and configuration file

include/openspace/util/camera.h

@@ -0,0 +1,58 @@
+#ifndef CAMERA_H
+#define CAMERA_H
+
+// open space includes
+#include <openspace/util/psc.h>
+
+// glm includes
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
+#include <glm/gtc/quaternion.hpp>
+
+namespace openspace {
+
+class Camera {
+public:
+
+	// constructors & destructor
+	Camera();
+	~Camera();
+
+	void setPosition(psc pos);
+	const psc& getPosition() const;
+	
+	void setViewProjectionMatrix(const glm::mat4 &viewProjectionMatrix);
+	void setCameraDirection(const glm::vec3 &cameraDirection);
+	
+	const glm::mat4 & getViewProjectionMatrix() const;
+	const glm::mat4 & getViewRotationMatrix() const;
+	void compileViewRotationMatrix();
+	
+	void rotate(glm::quat rotation);
+	void setRotation(glm::quat rotation);
+	const glm::quat & getRotation() const;
+
+	const glm::vec3 & getViewDirection() const;
+	const float & getMaxFov() const;
+	const float & getSinMaxFov() const;
+	void setMaxFov(const float &fov);
+	void setScaling(const glm::vec2 &scaling);
+	const glm::vec2 & getScaling() const;
+	
+private:
+	float maxFov_;
+	float sinMaxFov_;
+	psc position_;
+	glm::mat4 viewProjectionMatrix_;
+	glm::vec3 viewDirection_;
+	glm::vec3 cameraDirection_;
+	glm::vec2 scaling_;
+
+	glm::quat viewRotation_;
+	glm::mat4 viewRotationMatrix_; // compiled from the quaternion
+};
+
+} // namespace openspace
+
+#endif