summaryrefslogtreecommitdiff
path: root/src/joystick.cpp
blob: b72c910378c36a1c75114ee431a776ea24394c11 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
/*
 *  The Mana World
 *  Copyright (C) 2004  The Mana World Development Team
 *
 *  This file is part of The Mana World.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  any later version.
 *
 *  This program 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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "configuration.h"
#include "joystick.h"
#include "log.h"

#include <cassert>

int Joystick::joystickCount = 0;

void Joystick::init()
{
    SDL_InitSubSystem(SDL_INIT_JOYSTICK);

    // Have SDL call SDL_JoystickUpdate() automatically
    SDL_JoystickEventState(SDL_ENABLE);

    joystickCount = SDL_NumJoysticks();
    logger->log("%i joysticks/gamepads found", joystickCount);
    for (int i = 0; i < joystickCount; i++)
        logger->log("- %s", SDL_JoystickName(i));
}

Joystick::Joystick(int no):
    mDirection(0),
    mCalibrating(false),
    mEnabled(false)
{
    assert(no < joystickCount);

    mJoystick = SDL_JoystickOpen(no);

    // TODO Bail out!
    if (!mJoystick)
    {
        logger->log("Couldn't open joystick: %s", SDL_GetError());
        return;
    }

    logger->log("Axes: %i ", SDL_JoystickNumAxes(mJoystick));
    logger->log("Balls: %i", SDL_JoystickNumBalls(mJoystick));
    logger->log("Hats: %i", SDL_JoystickNumHats(mJoystick));
    logger->log("Buttons: %i", SDL_JoystickNumButtons(mJoystick));

    mEnabled = (int) config.getValue("joystickEnabled", 0) != 0;
    mUpTolerance = (int) config.getValue("upTolerance", 100);
    mDownTolerance = (int) config.getValue("downTolerance", 100);
    mLeftTolerance = (int) config.getValue("leftTolerance", 100);
    mRightTolerance = (int) config.getValue("rightTolerance", 100);
}

Joystick::~Joystick()
{
    SDL_JoystickClose(mJoystick);
}

void Joystick::update()
{
    mDirection = 0;

    // When calibrating, don't bother the outside with our state
    if (mCalibrating) {
        doCalibration();
        return;
    };

    if (!mEnabled)
        return;

    // X-Axis
    int position = SDL_JoystickGetAxis(mJoystick, 0);
    if (position >= mRightTolerance)
        mDirection |= RIGHT;
    else if (position <= mLeftTolerance)
        mDirection |= LEFT;

    // Y-Axis
    position = SDL_JoystickGetAxis(mJoystick, 1);
    if (position <= mUpTolerance)
        mDirection |= UP;
    else if (position >= mDownTolerance)
        mDirection |= DOWN;

    // Buttons
    for (int i = 0; i < MAX_BUTTONS; i++)
        mButtons[i] = (SDL_JoystickGetButton(mJoystick, i) == 1);
}

void Joystick::startCalibration()
{
    mUpTolerance = 0;
    mDownTolerance = 0;
    mLeftTolerance = 0;
    mRightTolerance = 0;
    mCalibrating = true;
}

void Joystick::doCalibration()
{
    // X-Axis
    int position = SDL_JoystickGetAxis(mJoystick, 0);
    if (position > mRightTolerance)
        mRightTolerance = position;
    else if (position < mLeftTolerance)
        mLeftTolerance = position;

    // Y-Axis
    position = SDL_JoystickGetAxis(mJoystick, 1);
    if (position > mDownTolerance)
        mDownTolerance = position;
    else if (position < mUpTolerance)
        mUpTolerance = position;
}

void Joystick::finishCalibration()
{
    config.setValue("leftTolerance", mLeftTolerance);
    config.setValue("rightTolerance", mRightTolerance);
    config.setValue("upTolerance", mUpTolerance);
    config.setValue("downTolerance", mDownTolerance);
    mCalibrating = false;
}

bool Joystick::buttonPressed(unsigned char no) const
{
    return (mEnabled && no < MAX_BUTTONS) ? mButtons[no] : false;
}