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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2015 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#ifndef SFML_SENSOR_HPP
#define SFML_SENSOR_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Window/Export.hpp>
#include <SFML/System/Vector3.hpp>
#include <SFML/System/Time.hpp>
namespace sf
{
////////////////////////////////////////////////////////////
/// \brief Give access to the real-time state of the sensors
///
////////////////////////////////////////////////////////////
class SFML_WINDOW_API Sensor
{
public:
////////////////////////////////////////////////////////////
/// \brief Sensor type
///
////////////////////////////////////////////////////////////
enum Type
{
Accelerometer, ///< Measures the raw acceleration (m/s^2)
Gyroscope, ///< Measures the raw rotation rates (degrees/s)
Magnetometer, ///< Measures the ambient magnetic field (micro-teslas)
Gravity, ///< Measures the direction and intensity of gravity, independent of device acceleration (m/s^2)
UserAcceleration, ///< Measures the direction and intensity of device acceleration, independent of the gravity (m/s^2)
Orientation, ///< Measures the absolute 3D orientation (degrees)
Count ///< Keep last -- the total number of sensor types
};
////////////////////////////////////////////////////////////
/// \brief Check if a sensor is available on the underlying platform
///
/// \param sensor Sensor to check
///
/// \return True if the sensor is available, false otherwise
///
////////////////////////////////////////////////////////////
static bool isAvailable(Type sensor);
////////////////////////////////////////////////////////////
/// \brief Enable or disable a sensor
///
/// All sensors are disabled by default, to avoid consuming too
/// much battery power. Once a sensor is enabled, it starts
/// sending events of the corresponding type.
///
/// This function does nothing if the sensor is unavailable.
///
/// \param sensor Sensor to enable
/// \param enabled True to enable, false to disable
///
////////////////////////////////////////////////////////////
static void setEnabled(Type sensor, bool enabled);
////////////////////////////////////////////////////////////
/// \brief Get the current sensor value
///
/// \param sensor Sensor to read
///
/// \return The current sensor value
///
////////////////////////////////////////////////////////////
static Vector3f getValue(Type sensor);
};
} // namespace sf
#endif // SFML_SENSOR_HPP
////////////////////////////////////////////////////////////
/// \class sf::Sensor
/// \ingroup window
///
/// sf::Sensor provides an interface to the state of the
/// various sensors that a device provides. It only contains static
/// functions, so it's not meant to be instantiated.
///
/// This class allows users to query the sensors values at any
/// time and directly, without having to deal with a window and
/// its events. Compared to the SensorChanged event, sf::Sensor
/// can retrieve the state of a sensor at any time (you don't need to
/// store and update its current value on your side).
///
/// Depending on the OS and hardware of the device (phone, tablet, ...),
/// some sensor types may not be available. You should always check
/// the availability of a sensor before trying to read it, with the
/// sf::Sensor::isAvailable function.
///
/// You may wonder why some sensor types look so similar, for example
/// Accelerometer and Gravity / UserAcceleration. The first one
/// is the raw measurement of the acceleration, and takes into account
/// both the earth gravity and the user movement. The others are
/// more precise: they provide these components separately, which is
/// usually more useful. In fact they are not direct sensors, they
/// are computed internally based on the raw acceleration and other sensors.
/// This is exactly the same for Gyroscope vs Orientation.
///
/// Because sensors consume a non-negligible amount of current, they are
/// all disabled by default. You must call sf::Sensor::setEnabled for each
/// sensor in which you are interested.
///
/// Usage example:
/// \code
/// if (sf::Sensor::isAvailable(sf::Sensor::Gravity))
/// {
/// // gravity sensor is available
/// }
///
/// // enable the gravity sensor
/// sf::Sensor::setEnabled(sf::Sensor::Gravity, true);
///
/// // get the current value of gravity
/// sf::Vector3f gravity = sf::Sensor::getValue(sf::Sensor::Gravity);
/// \endcode
///
////////////////////////////////////////////////////////////
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