151 lines
		
	
	
		
			5.7 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			151 lines
		
	
	
		
			5.7 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
| ////////////////////////////////////////////////////////////
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| //
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| // SFML - Simple and Fast Multimedia Library
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| // Copyright (C) 2007-2018 Laurent Gomila (laurent@sfml-dev.org)
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| //
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| // This software is provided 'as-is', without any express or implied warranty.
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| // In no event will the authors be held liable for any damages arising from the use of this software.
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| //
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| // Permission is granted to anyone to use this software for any purpose,
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| // including commercial applications, and to alter it and redistribute it freely,
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| // subject to the following restrictions:
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| //
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| // 1. The origin of this software must not be misrepresented;
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| //    you must not claim that you wrote the original software.
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| //    If you use this software in a product, an acknowledgment
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| //    in the product documentation would be appreciated but is not required.
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| //
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| // 2. Altered source versions must be plainly marked as such,
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| //    and must not be misrepresented as being the original software.
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| //
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| // 3. This notice may not be removed or altered from any source distribution.
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| //
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| ////////////////////////////////////////////////////////////
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| 
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| #ifndef SFML_SENSOR_HPP
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| #define SFML_SENSOR_HPP
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| 
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| ////////////////////////////////////////////////////////////
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| // Headers
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| ////////////////////////////////////////////////////////////
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| #include <SFML/Window/Export.hpp>
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| #include <SFML/System/Vector3.hpp>
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| #include <SFML/System/Time.hpp>
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| 
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| 
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| namespace sf
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| {
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| ////////////////////////////////////////////////////////////
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| /// \brief Give access to the real-time state of the sensors
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| ///
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| ////////////////////////////////////////////////////////////
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| class SFML_WINDOW_API Sensor
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| {
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| public:
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| 
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|     ////////////////////////////////////////////////////////////
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|     /// \brief Sensor type
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|     ///
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|     ////////////////////////////////////////////////////////////
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|     enum Type
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|     {
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|         Accelerometer,    ///< Measures the raw acceleration (m/s^2)
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|         Gyroscope,        ///< Measures the raw rotation rates (degrees/s)
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|         Magnetometer,     ///< Measures the ambient magnetic field (micro-teslas)
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|         Gravity,          ///< Measures the direction and intensity of gravity, independent of device acceleration (m/s^2)
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|         UserAcceleration, ///< Measures the direction and intensity of device acceleration, independent of the gravity (m/s^2)
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|         Orientation,      ///< Measures the absolute 3D orientation (degrees)
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| 
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|         Count             ///< Keep last -- the total number of sensor types
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|     };
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| 
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|     ////////////////////////////////////////////////////////////
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|     /// \brief Check if a sensor is available on the underlying platform
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|     ///
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|     /// \param sensor Sensor to check
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|     ///
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|     /// \return True if the sensor is available, false otherwise
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|     ///
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|     ////////////////////////////////////////////////////////////
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|     static bool isAvailable(Type sensor);
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| 
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|     ////////////////////////////////////////////////////////////
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|     /// \brief Enable or disable a sensor
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|     ///
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|     /// All sensors are disabled by default, to avoid consuming too
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|     /// much battery power. Once a sensor is enabled, it starts
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|     /// sending events of the corresponding type.
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|     ///
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|     /// This function does nothing if the sensor is unavailable.
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|     ///
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|     /// \param sensor  Sensor to enable
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|     /// \param enabled True to enable, false to disable
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|     ///
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|     ////////////////////////////////////////////////////////////
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|     static void setEnabled(Type sensor, bool enabled);
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| 
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|     ////////////////////////////////////////////////////////////
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|     /// \brief Get the current sensor value
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|     ///
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|     /// \param sensor Sensor to read
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|     ///
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|     /// \return The current sensor value
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|     ///
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|     ////////////////////////////////////////////////////////////
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|     static Vector3f getValue(Type sensor);
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| };
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| 
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| } // namespace sf
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| 
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| 
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| #endif // SFML_SENSOR_HPP
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| 
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| 
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| ////////////////////////////////////////////////////////////
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| /// \class sf::Sensor
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| /// \ingroup window
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| ///
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| /// sf::Sensor provides an interface to the state of the
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| /// various sensors that a device provides. It only contains static
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| /// functions, so it's not meant to be instantiated.
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| ///
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| /// This class allows users to query the sensors values at any
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| /// time and directly, without having to deal with a window and
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| /// its events. Compared to the SensorChanged event, sf::Sensor
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| /// can retrieve the state of a sensor at any time (you don't need to
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| /// store and update its current value on your side).
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| ///
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| /// Depending on the OS and hardware of the device (phone, tablet, ...),
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| /// some sensor types may not be available. You should always check
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| /// the availability of a sensor before trying to read it, with the
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| /// sf::Sensor::isAvailable function.
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| ///
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| /// You may wonder why some sensor types look so similar, for example
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| /// Accelerometer and Gravity / UserAcceleration. The first one
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| /// is the raw measurement of the acceleration, and takes into account
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| /// both the earth gravity and the user movement. The others are
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| /// more precise: they provide these components separately, which is
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| /// usually more useful. In fact they are not direct sensors, they
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| /// are computed internally based on the raw acceleration and other sensors.
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| /// This is exactly the same for Gyroscope vs Orientation.
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| ///
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| /// Because sensors consume a non-negligible amount of current, they are
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| /// all disabled by default. You must call sf::Sensor::setEnabled for each
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| /// sensor in which you are interested.
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| ///
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| /// Usage example:
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| /// \code
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| /// if (sf::Sensor::isAvailable(sf::Sensor::Gravity))
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| /// {
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| ///     // gravity sensor is available
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| /// }
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| ///
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| /// // enable the gravity sensor
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| /// sf::Sensor::setEnabled(sf::Sensor::Gravity, true);
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| ///
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| /// // get the current value of gravity
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| /// sf::Vector3f gravity = sf::Sensor::getValue(sf::Sensor::Gravity);
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| /// \endcode
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| ///
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| ////////////////////////////////////////////////////////////
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