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/rendering/renderable.h

@@ -0,0 +1,36 @@
+#ifndef RENDERABLE_H
+#define RENDERABLE_H
+
+// open space includes
+#include <openspace/util/psc.h>
+#include <openspace/util/pss.h>
+#include <openspace/util/camera.h>
+#include <ghoul/misc/dictionary.h>
+
+namespace openspace {
+
+class Renderable {
+public:
+    
+	// constructors & destructor
+	Renderable(const ghoul::Dictionary& dictionary);
+    virtual ~Renderable();
+	
+    virtual bool initialize() = 0;
+    virtual bool deinitialize() = 0;
+    
+	void setBoundingSphere(const pss &boundingSphere);
+	const pss &getBoundingSphere();
+
+	virtual void render(const Camera *camera, const psc &thisPosition) = 0;
+	virtual void update();
+protected:
+	Renderable();
+private:
+	pss boundingSphere_;
+
+};
+
+} // namespace openspace
+
+#endif

include/openspace/rendering/renderablebody.h

@@ -0,0 +1,37 @@
+#ifndef RENDERABLEBODY_H
+#define RENDERABLEBODY_H
+
+// open space includes
+#include <openspace/rendering/renderable.h>
+#include <openspace/util/sphere.h>
+
+// ghoul includes
+#include "ghoul/opengl/programobject.h"
+#include "ghoul/opengl/texture.h"
+
+namespace openspace {
+/*
+class RenderableBody: public Renderable {
+public:
+
+	// constructors & destructor
+	RenderableBody(const pss &radius);
+	~RenderableBody();
+
+	void setProgramObject(ghoul::opengl::ProgramObject *programObject);
+	void setTexture(ghoul::opengl::Texture *texture);
+
+	virtual void render(const Camera *camera, const psc &thisPosition);
+	virtual void update();
+
+private:
+	ghoul::opengl::ProgramObject *programObject_;
+	ghoul::opengl::Texture *texture_;
+	double rad_;
+
+	gl4::Sphere *planet_;
+};
+*/
+} // namespace openspace
+
+#endif

include/openspace/rendering/renderableplanet.h

@@ -0,0 +1,45 @@
+#ifndef RENDERABLEPLANET_H
+#define RENDERABLEPLANET_H
+
+// open space includes
+#include <openspace/rendering/renderable.h>
+#include <openspace/util/powerscaledsphere.h>
+
+// ghoul includes
+#include <ghoul/opengl/programobject.h>
+#include <ghoul/opengl/texture.h>
+
+namespace openspace {
+
+class RenderablePlanet: public Renderable {
+public:
+
+	// constructors & destructor
+	RenderablePlanet(const ghoul::Dictionary& dictionary);
+	~RenderablePlanet();
+    
+    bool initialize();
+    bool deinitialize();
+
+	void setProgramObject(ghoul::opengl::ProgramObject *programObject = nullptr);
+	void setTexture(ghoul::opengl::Texture *texture);
+
+	virtual void render(const Camera *camera, const psc &thisPosition);
+	virtual void update();
+
+private:
+	
+    // shader
+    ghoul::opengl::ProgramObject *programObject_;
+    
+    // texture
+    std::string _texturePath;
+	ghoul::opengl::Texture *texture_;
+    
+    // Object
+	PowerScaledSphere *planet_;
+};
+
+} // namespace openspace
+
+#endif

include/openspace/rendering/renderengine.h

@@ -0,0 +1,62 @@
+/*****************************************************************************************
+ *                                                                                       *
+ * OpenSpace                                                                             *
+ *                                                                                       *
+ * Copyright (c) 2014                                                                    *
+ *                                                                                       *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
+ * software and associated documentation files (the "Software"), to deal in the Software *
+ * without restriction, including without limitation the rights to use, copy, modify,    *
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
+ * permit persons to whom the Software is furnished to do so, subject to the following   *
+ * conditions:                                                                           *
+ *                                                                                       *
+ * The above copyright notice and this permission notice shall be included in all copies *
+ * or substantial portions of the Software.                                              *
+ *                                                                                       *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
+ ****************************************************************************************/
+
+#ifndef __RENDERENGINE_H__
+#define __RENDERENGINE_H__
+
+#include <openspace/scenegraph/scenegraph.h>
+
+#include <string>
+
+namespace openspace {
+
+class Camera;
+
+class RenderEngine {
+public:
+	RenderEngine();
+	~RenderEngine();
+	
+    bool initialize();
+
+    SceneGraph* sceneGraph();
+
+	// sgct wrapped functions
+    bool initializeGL();
+    void postSynchronizationPreDraw();
+    void render();
+    void postDraw();
+
+	// object extensions
+	//virtual void encode();
+	//virtual void decode();
+	
+private:
+	Camera* _mainCamera;
+	SceneGraph* _sceneGraph;
+};
+
+} // namespace openspace
+
+#endif // __RENDERENGINE_H__