| // This file is part of Eigen, a lightweight C++ template library | 
 | // for linear algebra. | 
 | // | 
 | // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr> | 
 | // | 
 | // This Source Code Form is subject to the terms of the Mozilla | 
 | // Public License v. 2.0. If a copy of the MPL was not distributed | 
 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. | 
 |  | 
 | #ifndef EIGEN_CAMERA_H | 
 | #define EIGEN_CAMERA_H | 
 |  | 
 | #include <Eigen/Geometry> | 
 | #include <QObject> | 
 | // #include <frame.h> | 
 |  | 
 | class Frame { | 
 |  public: | 
 |   EIGEN_MAKE_ALIGNED_OPERATOR_NEW | 
 |  | 
 |   inline Frame(const Eigen::Vector3f& pos = Eigen::Vector3f::Zero(), const Eigen::Quaternionf& o = Eigen::Quaternionf()) | 
 |       : orientation(o), position(pos) {} | 
 |   Frame lerp(float alpha, const Frame& other) const { | 
 |     return Frame((1.f - alpha) * position + alpha * other.position, orientation.slerp(alpha, other.orientation)); | 
 |   } | 
 |  | 
 |   Eigen::Quaternionf orientation; | 
 |   Eigen::Vector3f position; | 
 | }; | 
 |  | 
 | class Camera { | 
 |  public: | 
 |   EIGEN_MAKE_ALIGNED_OPERATOR_NEW | 
 |  | 
 |   Camera(void); | 
 |  | 
 |   Camera(const Camera& other); | 
 |  | 
 |   virtual ~Camera(); | 
 |  | 
 |   Camera& operator=(const Camera& other); | 
 |  | 
 |   void setViewport(uint offsetx, uint offsety, uint width, uint height); | 
 |   void setViewport(uint width, uint height); | 
 |  | 
 |   inline uint vpX(void) const { return mVpX; } | 
 |   inline uint vpY(void) const { return mVpY; } | 
 |   inline uint vpWidth(void) const { return mVpWidth; } | 
 |   inline uint vpHeight(void) const { return mVpHeight; } | 
 |  | 
 |   inline float fovY(void) const { return mFovY; } | 
 |   void setFovY(float value); | 
 |  | 
 |   void setPosition(const Eigen::Vector3f& pos); | 
 |   inline const Eigen::Vector3f& position(void) const { return mFrame.position; } | 
 |  | 
 |   void setOrientation(const Eigen::Quaternionf& q); | 
 |   inline const Eigen::Quaternionf& orientation(void) const { return mFrame.orientation; } | 
 |  | 
 |   void setFrame(const Frame& f); | 
 |   const Frame& frame(void) const { return mFrame; } | 
 |  | 
 |   void setDirection(const Eigen::Vector3f& newDirection); | 
 |   Eigen::Vector3f direction(void) const; | 
 |   void setUp(const Eigen::Vector3f& vectorUp); | 
 |   Eigen::Vector3f up(void) const; | 
 |   Eigen::Vector3f right(void) const; | 
 |  | 
 |   void setTarget(const Eigen::Vector3f& target); | 
 |   inline const Eigen::Vector3f& target(void) { return mTarget; } | 
 |  | 
 |   const Eigen::Affine3f& viewMatrix(void) const; | 
 |   const Eigen::Matrix4f& projectionMatrix(void) const; | 
 |  | 
 |   void rotateAroundTarget(const Eigen::Quaternionf& q); | 
 |   void localRotate(const Eigen::Quaternionf& q); | 
 |   void zoom(float d); | 
 |  | 
 |   void localTranslate(const Eigen::Vector3f& t); | 
 |  | 
 |   /** Setup OpenGL matrices and viewport */ | 
 |   void activateGL(void); | 
 |  | 
 |   Eigen::Vector3f unProject(const Eigen::Vector2f& uv, float depth, const Eigen::Matrix4f& invModelview) const; | 
 |   Eigen::Vector3f unProject(const Eigen::Vector2f& uv, float depth) const; | 
 |  | 
 |  protected: | 
 |   void updateViewMatrix(void) const; | 
 |   void updateProjectionMatrix(void) const; | 
 |  | 
 |  protected: | 
 |   uint mVpX, mVpY; | 
 |   uint mVpWidth, mVpHeight; | 
 |  | 
 |   Frame mFrame; | 
 |  | 
 |   mutable Eigen::Affine3f mViewMatrix; | 
 |   mutable Eigen::Matrix4f mProjectionMatrix; | 
 |  | 
 |   mutable bool mViewIsUptodate; | 
 |   mutable bool mProjIsUptodate; | 
 |  | 
 |   // used by rotateAroundTarget | 
 |   Eigen::Vector3f mTarget; | 
 |  | 
 |   float mFovY; | 
 |   float mNearDist; | 
 |   float mFarDist; | 
 | }; | 
 |  | 
 | #endif  // EIGEN_CAMERA_H |