manipulated_camera_frame.h

/********************************************************************
 * Copyright (C) 2015 Liangliang Nan <liangliang.nan@gmail.com>
 * https://3d.bk.tudelft.nl/liangliang/
 *
 * This file is part of Easy3D. If it is useful in your research/work,
 * I would be grateful if you show your appreciation by citing it:
 * ------------------------------------------------------------------
 *      Liangliang Nan.
 *      Easy3D: a lightweight, easy-to-use, and efficient C++ library
 *      for processing and rendering 3D data.
 *      Journal of Open Source Software, 6(64), 3255, 2021.
 * ------------------------------------------------------------------
 *
 * Easy3D is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 3
 * as published by the Free Software Foundation.
 *
 * Easy3D is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 ********************************************************************/

 
#ifndef EASY3D_RENDERER_MANIPULATED_CAMERA_FRAME_H
#define EASY3D_RENDERER_MANIPULATED_CAMERA_FRAME_H
 
#include <easy3d/renderer/manipulated_frame.h>
 
 
namespace easy3d {

    class ManipulatedCameraFrame : public ManipulatedFrame {
    public:
        ManipulatedCameraFrame();

        ~ManipulatedCameraFrame() override = default;

        ManipulatedCameraFrame(const ManipulatedCameraFrame &mcf);

        ManipulatedCameraFrame &operator=(const ManipulatedCameraFrame &mcf);


        vec3 pivotPoint() const { return pivotPoint_; }

        void setPivotPoint(const vec3 &point) { pivotPoint_ = point; }

    public:
        bool zoomsOnPivotPoint() const { return zoomsOnPivotPoint_; }

        void setZoomsOnPivotPoint(bool enabled) { zoomsOnPivotPoint_ = enabled; }


        void action_rotate(int mouse_x, int mouse_y, int mouse_dx, int mouse_dy, Camera* camera, ScreenAxis axis) override;
        void action_translate(int mouse_x, int mouse_y, int mouse_dx, int mouse_dy, Camera* camera, ScreenAxis axis) override;
        void action_zoom(int dy_wheel, Camera* camera) override;
        virtual void action_turn(float angle_radian, Camera* camera);
 
        //---------------------------------------------------------------
        // more movement of the camera
        //---------------------------------------------------------------
 
//      if (key == GLFW_KEY_UP && modifiers == 0) { // move camera forward
//          float step = 0.02f * camera_->sceneRadius();
//          camera_->frame()->translate(camera_->frame()->inverseTransformOf(vec3(0.0, 0.0, -step)));
//      }
//      else if (key == GLFW_KEY_DOWN && modifiers == 0) {// move camera backward
//          float step = 0.02f * camera_->sceneRadius();
//          camera_->frame()->translate(camera_->frame()->inverseTransformOf(vec3(0.0, 0.0, step)));
//      }
//        else if (key == GLFW_KEY_LEFT && modifiers == GLFW_MOD_CONTROL) { // move camera left
//            float step = 0.02f * camera_->sceneRadius();
//            camera_->frame()->translate(camera_->frame()->inverseTransformOf(vec3(-step, 0.0, 0.0)));
//        }
//        else if (key == GLFW_KEY_RIGHT && modifiers == GLFW_MOD_CONTROL) {    // move camera right
//            float step = 0.02f * camera_->sceneRadius();
//            camera_->frame()->translate(camera_->frame()->inverseTransformOf(vec3(step, 0.0, 0.0)));
//        }
//      else if (key == GLFW_KEY_UP && modifiers == GLFW_MOD_CONTROL) { // move camera up
//          float step = 0.02f * camera_->sceneRadius();
//          camera_->frame()->translate(camera_->frame()->inverseTransformOf(vec3(0.0, step, 0.0)));
//      }
//      else if (key == GLFW_KEY_DOWN && modifiers == GLFW_MOD_CONTROL) {   // move camera down
//          float step = 0.02f * camera_->sceneRadius();
//          camera_->frame()->translate(camera_->frame()->inverseTransformOf(vec3(0.0, -step, 0.0)));
//      }
//
//---------------------------------------------------------------------------
//
//        // zoom to pixel
//        const double coef = 0.1;
//        // Small hack: attach a temporary frame to take advantage of lookAt without modifying frame
//        static ManipulatedCameraFrame* tempFrame = new ManipulatedCameraFrame;
//        tempFrame->setPosition(coef*camera()->frame()->position() + (1.0-coef)*p);
//        tempFrame->setOrientation(camera()->frame()->orientation());
//        camera()->setFrame(tempFrame);
//        camera()->lookAt(p);
//
//        // zoom to fit screen
//        static ManipulatedCameraFrame* tempFrame = new ManipulatedCameraFrame;
//        tempFrame->setPosition(camera()->frame()->position());
//        tempFrame->setOrientation(camera()->frame()->orientation());
//        camera()->setFrame(tempFrame);
//        camera()->showEntireScene();
 
    private:
        bool zoomsOnPivotPoint_;
        vec3 pivotPoint_;
 
    private:
        friend class Camera;
        friend class Viewer;
    };
 
 
}
 
#endif // EASY3D_RENDERER_MANIPULATED_CAMERA_FRAME_H