Camera.h

#ifndef __CAMERA_H__
#define __CAMERA_H__


/**
 * Basic camera class.
 */

class Camera {

public:

    Camera();
    Camera( int screenWidth, int screenHeight );

    void SetViewport( int x, int y, int width, int height );
    glm::vec4 GetViewport() const;

    void SetProjectionRH( float fov, float aspectRatio, float zNear, float zFar );

    void ApplyViewMatrix();

    void SetPosition( const glm::vec3& pos );
    glm::vec3 GetPosition() const;

    // Translate the camera by some amount. If local is TRUE (default) then the translation should
    // be applied in the local-space of the camera. If local is FALSE, then the translation is
    // applied in world-space.
    void Translate( const glm::vec3& delta, bool local = true );

    void SetRotation( const glm::quat& rot );
    glm::quat GetRotation() const;

    void SetEulerAngles( const glm::vec3& eulerAngles );
    glm::vec3 GetEulerAngles() const;

    // Rotate the camera by some amount.
    void Rotate( const glm::quat& rot );

    glm::mat4 GetProjectionMatrix();
    glm::mat4 GetViewMatrix();

protected:

    void UpdateViewMatrix();

    glm::vec4 m_Viewport;

    glm::vec3 m_Position;
    glm::quat m_Rotation;

    glm::mat4 m_ViewMatrix;
    glm::mat4 m_ProjectionMatrix;

private:

    bool m_ViewDirty;

};


#endif // __CAMERA_H__