source/designer/cameracontroller.h

   1 /* $Id$
   2
   3 This file is part of R²C²
   4 Copyright © 2010-2011 Mikkosoft Productions, Mikko Rasa
   5 Distributed under the GPL
   6 */
   7
   8 #ifndef CAMERACONTROLLER_H_
   9 #define CAMERACONTROLLER_H_
  10
  11 #include <msp/gbase/window.h>
  12 #include <msp/gl/camera.h>
  13 #include "3d/view.h"
  14
  15 /**
  16 Moves the camera based on keyboard and mouse events.  Controls are as follows:
  17
  18 Arrow keys  - pan
  19 Home        - view all
  20 Insert      - view from top down
  21 Wheel       - adjust viewing distance
  22 RMB         - rotate
  23 MMB         - pan
  24 Shift + RMB - pan
  25 Shift + MMB - rotate
  26 Ctrl + RMB  - adjust viewing distance
  27 Ctrl + MMB  - adjust viewing distance
  28 */
  29 class CameraController
  30 {
  31 private:
  32         enum DragMode
  33         {
  34                 NONE,
  35                 PAN,
  36                 ROTATE,
  37                 DISTANCE
  38         };
  39
  40         R2C2::View3D &view;
  41         Msp::Graphics::EventSource &event_source;
  42         Msp::GL::Camera &camera;
  43         int move_x;
  44         int move_y;
  45         int pointer_x;
  46         int pointer_y;
  47         DragMode drag_mode;
  48
  49 public:
  50         CameraController(R2C2::View3D &, Msp::Graphics::EventSource &);
  51
  52         void top_down();
  53         void set_look_direction(const Msp::GL::Vector3 &);
  54         void view_all();
  55
  56         void move(float, float);
  57         void adjust_distance(float);
  58         void rotate(float);
  59         void pitch(float);
  60
  61         void tick(float);
  62 private:
  63         void button_press(int, int, unsigned, unsigned);
  64         void button_release(int, int, unsigned, unsigned);
  65         void pointer_motion(int, int);
  66         void key_press(unsigned, unsigned, wchar_t);
  67         void key_release(unsigned, unsigned);
  68
  69 public:
  70         /** Return the focus point, i.e. where the look ray intersects with ground. */
  71         Msp::GL::Vector3 get_focus() const;
  72
  73         /** Return distance from the focus point. */
  74         float get_distance() const;
  75
  76         /** Return the viewport height at focus distance. */
  77         float get_view_scale() const;
  78 };
  79
  80 #endif