forked from 0ad/0ad
105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
/* Copyright (C) 2014 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "Joystick.h"
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#include "lib/external_libraries/libsdl.h"
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#include "ps/CLogger.h"
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#include "ps/ConfigDB.h"
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CJoystick g_Joystick;
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CJoystick::CJoystick() :
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m_Joystick(NULL), m_Deadzone(0)
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{
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}
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void CJoystick::Initialise()
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{
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bool joystickEnable = false;
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CFG_GET_VAL("joystick.enable", joystickEnable);
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if (!joystickEnable)
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return;
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CFG_GET_VAL("joystick.deadzone", m_Deadzone);
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if (SDL_InitSubSystem(SDL_INIT_JOYSTICK) < 0)
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{
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LOGERROR(L"CJoystick::Initialise failed to initialise joysticks (\"%hs\")", SDL_GetError());
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return;
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}
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int numJoysticks = SDL_NumJoysticks();
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LOGMESSAGE(L"Found %d joystick(s)", numJoysticks);
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for (int i = 0; i < numJoysticks; ++i)
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{
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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SDL_Joystick* stick = SDL_JoystickOpen(i);
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if (!stick)
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{
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LOGERROR(L"CJoystick::Initialise failed to open joystick %d (\"%hs\")", i, SDL_GetError());
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continue;
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}
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const char* name = SDL_JoystickName(stick);
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#else // SDL 1.2
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const char* name = SDL_JoystickName(i);
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#endif
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LOGMESSAGE(L"Joystick %d: %hs", i, name);
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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SDL_JoystickClose(stick);
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#endif
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}
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if (numJoysticks)
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{
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SDL_JoystickEventState(SDL_ENABLE);
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// Always pick the first joystick, and assume that's the right one
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m_Joystick = SDL_JoystickOpen(0);
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if (!m_Joystick)
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LOGERROR(L"CJoystick::Initialise failed to open joystick (\"%hs\")", SDL_GetError());
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}
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}
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bool CJoystick::IsEnabled()
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{
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return (m_Joystick != NULL);
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}
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float CJoystick::GetAxisValue(int axis)
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{
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if (!m_Joystick || axis < 0 || axis >= SDL_JoystickNumAxes(m_Joystick))
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return 0.f;
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int16_t val = SDL_JoystickGetAxis(m_Joystick, axis);
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// Normalize values into the range [-1, +1] excluding the deadzone around 0
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float norm;
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if (val > m_Deadzone)
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norm = (val - m_Deadzone) / (float)(32767 - m_Deadzone);
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else if (val < -m_Deadzone)
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norm = (val + m_Deadzone) / (float)(32767 - m_Deadzone);
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else
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norm = 0.f;
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return norm;
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}
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