source/designer/cameracontroller.h

   1 #ifndef CAMERACONTROLLER_H_
   2 #define CAMERACONTROLLER_H_
   3
   4 #include <msp/gbase/window.h>
   5 #include <msp/gl/camera.h>
   6 #include "3d/view.h"
   7
   8 /**
   9 Moves the camera based on keyboard and mouse events.  Controls are as follows:
  10
  11 Arrow keys  - pan
  12 Home        - view all
  13 Insert      - view from top down
  14 Wheel       - adjust viewing distance
  15 RMB         - rotate
  16 MMB         - pan
  17 Shift + RMB - pan
  18 Shift + MMB - rotate
  19 Ctrl + RMB  - adjust viewing distance
  20 Ctrl + MMB  - adjust viewing distance
  21 */
  22 class CameraController
  23 {
  24 private:
  25         enum DragMode
  26         {
  27                 NONE,
  28                 PAN,
  29                 ROTATE,
  30                 DISTANCE
  31         };
  32
  33         R2C2::View3D &view;
  34         Msp::Graphics::EventSource &event_source;
  35         Msp::GL::Camera &camera;
  36         int move_x;
  37         int move_y;
  38         int pointer_x;
  39         int pointer_y;
  40         DragMode drag_mode;
  41
  42 public:
  43         CameraController(R2C2::View3D &, Msp::Graphics::EventSource &);
  44
  45         void top_down();
  46         void set_look_direction(const Msp::GL::Vector3 &);
  47         void view_all();
  48
  49         void move(float, float);
  50         void adjust_distance(float);
  51         void rotate(float);
  52         void pitch(float);
  53
  54         void tick(float);
  55 private:
  56         void button_press(int, int, unsigned, unsigned);
  57         void button_release(int, int, unsigned, unsigned);
  58         void pointer_motion(int, int);
  59         void key_press(unsigned, unsigned, wchar_t);
  60         void key_release(unsigned, unsigned);
  61
  62 public:
  63         /** Return the focus point, i.e. where the look ray intersects with ground. */
  64         Msp::GL::Vector3 get_focus() const;
  65
  66         /** Return distance from the focus point. */
  67         float get_distance() const;
  68
  69         /** Return the viewport height at focus distance. */
  70         float get_view_scale() const;
  71 };
  72
  73 #endif