Added basic camera functionality

include/camera.hpp

@@ -0,0 +1,110 @@
+/*****************************************************************//**
+ * \file   camera.hpp
+ * \brief  Contains anything relevant to cameras
+ * 
+ * \author Lauchmelder
+ * \date   January 2021
+ *********************************************************************/
+#ifndef CAMERA_HPP
+#define CAMERA_HPP
+
+#include <core.hpp>
+#include <transformable.hpp>
+
+namespace oglu
+{
+	class Object;
+
+	/**
+	 * @brief A camera object in 3D space.
+	 * 
+	 * This class unites a world- and projection matrix.
+	 */
+	class OGLU_API Camera : public Transformable
+	{
+	public:
+		/**
+		 * @brief Create a default camera.
+		 * 
+		 * Sits at the origin, looks in negative z-direction.
+		 * FOV: 45.0°
+		 * Aspect ratio: Matches the viewport
+		 * zNear: 0.1f
+		 * zFar: 100.0f
+		 */
+		Camera();
+
+		/**
+		 * @brief Copy another camera.
+		 *
+		 * Every property of @p other is copied.
+		 * 
+		 * @param[in] other The camera to copy from
+		 */
+		Camera(const Camera& other);
+
+		/**
+		 * @brief Create a new camera.
+		 * 
+		 * Sits at the origin, looks in negative z-direction.
+		 * The other properties are set from the parameters
+		 * 
+		 * @param[in] fov The FOV (field of view) of the camera
+		 * @param[in] aspectRatio The aspect ratio of the camera. (Setting this to 0.f will use your viewport's aspect ratio)
+		 * @param[in] zNear Near z clipping plane
+		 * @param[in] zNear Far z clipping plane
+		 */
+		Camera(float fov, float aspectRatio, float zNear, float zFar);
+
+		~Camera();
+
+		/**
+		 * @brief Have camera face at a certain position.
+		 * 
+		 * This will adjust the camera's rotation in order to put the
+		 * specified coordinate at the center of the screen.
+		 * 
+		 * @param[in] x Target x coordinate
+		 * @param[in] y Target y coordinate
+		 * @param[in] z Target z coordinate
+		 */
+		void LookAt(GLfloat x, GLfloat y, GLfloat z);
+
+		/**
+		 * @brief Have camera face at a certain position.
+		 *
+		 * This will adjust the camera's rotation in order to put the
+		 * specified coordinate at the center of the screen.
+		 *
+		 * @param[in] target 3D vector with the target position
+		 */
+		void LookAt(const GLfloat* target);
+
+		/**
+		 * @brief Have camera face at a certain position.
+		 *
+		 * This will adjust the camera's rotation in order to put the
+		 * specified coordinate at the center of the screen.
+		 *
+		 * @param[in] target An object to target
+		 */
+		void LookAt(const Object& target);
+
+		/**
+		 * @brief Gets the projection matrix of the camera.
+		 * 
+		 * @returns a 4x4 projection matrix.
+		 */
+		const float* GetProjectionMatrix();
+
+	private:
+		float aspectRatio;	///< Aspect ration of the camera
+		float fov;			///< FOV of the camera
+		float zNear;		///< Near z clipping plane
+		float zFar;			///< Far z clipping plane
+
+		float* projection;
+	};
+}
+
+#endif