root/OpenSceneGraph/trunk/src/osgPlugins/sdl/JoystickDevice.cpp @ 13429

Revision 13429, 5.4 kB (checked in by robert, 4 days ago)

Added shaders to support experimental shader based displacement mapping technique osgTerrain::ShaderTerrain?.

Line 
1/* -*-c++-*- Present3D - Copyright (C) 1999-2006 Robert Osfield
2 *
3 * This software is open source and may be redistributed and/or modified under 
4 * the terms of the GNU General Public License (GPL) version 2.0.
5 * The full license is in LICENSE.txt file included with this distribution,.
6 *
7 * This software is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * include LICENSE.txt for more details.
11*/
12
13#include <osgViewer/Viewer>
14
15#include "JoystickDevice.h"
16
17#include <SDL.h>
18#include <SDL_events.h>
19#include <SDL_joystick.h>
20
21#include <iostream>
22
23JoystickDevice::JoystickDevice()
24{
25    _verbose = false;
26
27    // init SDL
28    if ( SDL_Init(SDL_INIT_JOYSTICK) < 0 )
29    {
30        fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
31        exit(1);
32    }
33    atexit(SDL_Quit);
34
35    int numJoysticks =  SDL_NumJoysticks();
36   
37    if (_verbose)
38    {
39        std::cout<<"number of joysticks "<<numJoysticks<<std::endl;
40        for(int i=0; i<numJoysticks; ++i)
41        {
42            std::cout<<"Joystick name '"<<SDL_JoystickName(i)<<"'"<<std::endl;
43        }
44    }
45   
46    _joystick = numJoysticks>0 ? SDL_JoystickOpen(0) : 0;
47   
48    _numAxes = _joystick ? SDL_JoystickNumAxes(_joystick) : 0;
49    _numBalls = _joystick ? SDL_JoystickNumBalls(_joystick) : 0;
50    _numHats = _joystick ? SDL_JoystickNumHats(_joystick) : 0;
51    _numButtons = _joystick ? SDL_JoystickNumButtons(_joystick) : 0;
52
53    if (_verbose)
54    {
55        std::cout<<"numAxes = "<<_numAxes<<std::endl;
56        std::cout<<"numBalls = "<<_numBalls<<std::endl;
57        std::cout<<"numHats = "<<_numHats<<std::endl;
58        std::cout<<"numButtons = "<<_numButtons<<std::endl;
59    }
60       
61    addMouseButtonMapping(4, 1); // left
62    addMouseButtonMapping(5, 3); // right
63    addMouseButtonMapping(6, 2); // middle
64
65    addKeyMapping(10, ' '); // R2
66   
67    addKeyMapping(0, '1'); // 1
68    addKeyMapping(1, '2'); // 2
69    addKeyMapping(2, '3'); // 3
70    addKeyMapping(4, '4'); // 4
71
72    addKeyMapping(7, ' '); // home
73
74    addKeyMapping(8, osgGA::GUIEventAdapter::KEY_Page_Up); // Start
75    addKeyMapping(9, osgGA::GUIEventAdapter::KEY_Page_Down); // Start
76    addKeyMapping(10, osgGA::GUIEventAdapter::KEY_Home); // Start
77
78
79    capture(_axisValues, _buttonValues);
80}
81
82JoystickDevice::~JoystickDevice()
83{
84}
85
86void JoystickDevice::capture(ValueList& axisValues, ValueList& buttonValues) const
87{
88    if (_joystick)
89    {
90        SDL_JoystickUpdate();
91       
92        axisValues.resize(_numAxes);
93        for(int ai=0; ai<_numAxes; ++ai)
94        {
95            axisValues[ai] = SDL_JoystickGetAxis(_joystick, ai);
96        }
97
98        buttonValues.resize(_numButtons);
99        for(int bi=0; bi<_numButtons; ++bi)
100        {
101            buttonValues[bi] = SDL_JoystickGetButton(_joystick, bi);
102        }
103    }
104}
105
106bool JoystickDevice::checkEvents()
107{
108    if (_joystick)
109    {
110
111        OSG_NOTICE<<"JoystickDevice::checkEvents()"<<std::endl;
112   
113        ValueList newAxisValues;
114        ValueList newButtonValues;
115       
116        capture(newAxisValues, newButtonValues);
117       
118        unsigned int mouseXaxis = 0;
119        unsigned int mouseYaxis = 1;
120       
121        float prev_mx = (float)_axisValues[mouseXaxis]/32767.0f;
122        float prev_my = -(float)_axisValues[mouseYaxis]/32767.0f;
123
124        float mx = (float)newAxisValues[mouseXaxis]/32767.0f;
125        float my = -(float)newAxisValues[mouseYaxis]/32767.0f;
126       
127
128        osgGA::EventQueue* eq = getEventQueue();
129        double time = eq ? eq->getTime() : 0.0;
130        osgGA::GUIEventAdapter* previous_event = eq->getCurrentEventState();
131        float projected_mx = previous_event->getXmin() + (mx+1.0)*0.5*(previous_event->getXmax()-previous_event->getXmin());
132        float projected_my = previous_event->getYmin() + (my+1.0)*0.5*(previous_event->getYmax()-previous_event->getYmin());
133
134        if (mx!=prev_mx || my!=prev_my)
135        {
136            eq->mouseMotion(projected_mx, projected_my, time);
137        }
138
139        OSG_NOTICE<<"mx="<<mx<<", my="<<my<<", projected_mx="<<projected_mx<<", projected_my="<<projected_my<<std::endl;
140
141
142        if (_verbose)
143        {
144            for(int ai=0; ai<_numAxes; ++ai)
145            {
146                if (newAxisValues[ai]!=_axisValues[ai])
147                {
148                    std::cout<<"axis "<<ai<<" moved to "<<newAxisValues[ai]<<std::endl;
149                }
150            }
151        }
152               
153        for(int bi=0; bi<_numButtons; ++bi)
154        {
155            if (newButtonValues[bi]!=_buttonValues[bi])
156            {
157                if (_verbose)
158                {
159                    std::cout<<"button "<<bi<<" changed to "<<newButtonValues[bi]<<std::endl;
160                }
161
162                int key =  getKeyMapping(bi);
163                int mouseButton =  getMouseButtonMapping(bi);
164
165                if (mouseButton>0)
166                {
167                    if (newButtonValues[bi]==0) eq->mouseButtonRelease(projected_mx,projected_my,mouseButton,time);
168                    else  eq->mouseButtonPress(projected_mx,projected_my,mouseButton,time);
169                }
170                else if (key>0)
171                {
172
173                    if (newButtonValues[bi]==0) eq->keyRelease(key,time);
174                    else eq->keyPress(key,time);
175                }
176            }
177        }
178       
179        _axisValues.swap(newAxisValues);
180        _buttonValues.swap(newButtonValues);
181       
182    }
183    return !(getEventQueue()->empty());
184}
185       
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