source/designer/cameracontroller.h

   1 #ifndef CAMERACONTROLLER_H_
   2 #define CAMERACONTROLLER_H_
   3
   4 #include <msp/graphics/window.h>
   5 #include <msp/gl/camera.h>
   6 #include <msp/input/keyboard.h>
   7 #include <msp/input/mouse.h>
   8 #include "3d/view.h"
   9
  10 /**
  11 Moves the camera based on keyboard and mouse events.  Controls are as follows:
  12
  13 Arrow keys  - pan
  14 Home        - view all
  15 Insert      - view from top down
  16 Wheel       - adjust viewing distance
  17 RMB         - rotate
  18 MMB         - pan
  19 Shift + RMB - pan
  20 Shift + MMB - rotate
  21 Ctrl + RMB  - adjust viewing distance
  22 Ctrl + MMB  - adjust viewing distance
  23 */
  24 class CameraController
  25 {
  26 private:
  27         enum DragMode
  28         {
  29                 NONE,
  30                 PAN,
  31                 ROTATE,
  32                 DISTANCE
  33         };
  34
  35         R2C2::View3D &view;
  36         Msp::Input::Keyboard &keyboard;
  37         Msp::Input::Mouse &mouse;
  38         Msp::GL::Camera &camera;
  39         int move_x;
  40         int move_y;
  41         int pointer_x;
  42         int pointer_y;
  43         bool shift_pressed;
  44         bool ctrl_pressed;
  45         DragMode drag_mode;
  46
  47 public:
  48         CameraController(R2C2::View3D &, Msp::Input::Keyboard &, Msp::Input::Mouse &);
  49
  50         void top_down();
  51         void set_look_direction(const Msp::GL::Vector3 &);
  52         void view_all();
  53
  54         void move(float, float);
  55         void adjust_distance(float);
  56         void rotate(const R2C2::Angle &);
  57         void pitch(const R2C2::Angle &);
  58
  59         void tick(float);
  60 private:
  61         void button_press(unsigned);
  62         void button_release(unsigned);
  63         void axis_motion(unsigned, float, float);
  64         void key_press(unsigned);
  65         void key_release(unsigned);
  66
  67 public:
  68         /** Return the focus point, i.e. where the look ray intersects with ground. */
  69         Msp::GL::Vector3 get_focus() const;
  70
  71         /** Return distance from the focus point. */
  72         float get_distance() const;
  73
  74         /** Return the viewport height at focus distance. */
  75         float get_view_scale() const;
  76 };
  77
  78 #endif