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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.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Window/SensorImpl.hpp>
#include <SFML/Window/iOS/SFAppDelegate.hpp>
namespace
{
unsigned int deviceMotionEnabledCount = 0;
float toDegrees(float radians)
{
return radians * 180.f / 3.141592654f;
}
}
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
void SensorImpl::initialize()
{
// Nothing to do
}
////////////////////////////////////////////////////////////
void SensorImpl::cleanup()
{
// Nothing to do
}
////////////////////////////////////////////////////////////
bool SensorImpl::isAvailable(Sensor::Type sensor)
{
switch (sensor)
{
case Sensor::Accelerometer:
return [SFAppDelegate getInstance].motionManager.accelerometerAvailable;
case Sensor::Gyroscope:
return [SFAppDelegate getInstance].motionManager.gyroAvailable;
case Sensor::Magnetometer:
return [SFAppDelegate getInstance].motionManager.magnetometerAvailable;
case Sensor::Gravity:
case Sensor::UserAcceleration:
case Sensor::Orientation:
return [SFAppDelegate getInstance].motionManager.deviceMotionAvailable;
default:
return false;
}
}
////////////////////////////////////////////////////////////
bool SensorImpl::open(Sensor::Type sensor)
{
// Store the sensor type
m_sensor = sensor;
// The sensor is disabled by default
m_enabled = false;
// Set the refresh rate (use the maximum allowed)
static const NSTimeInterval updateInterval = 1. / 60.;
switch (sensor)
{
case Sensor::Accelerometer:
[SFAppDelegate getInstance].motionManager.accelerometerUpdateInterval = updateInterval;
break;
case Sensor::Gyroscope:
[SFAppDelegate getInstance].motionManager.gyroUpdateInterval = updateInterval;
break;
case Sensor::Magnetometer:
[SFAppDelegate getInstance].motionManager.magnetometerUpdateInterval = updateInterval;
break;
case Sensor::Gravity:
case Sensor::UserAcceleration:
case Sensor::Orientation:
[SFAppDelegate getInstance].motionManager.deviceMotionUpdateInterval = updateInterval;
break;
default:
break;
}
return true;
}
////////////////////////////////////////////////////////////
void SensorImpl::close()
{
// Nothing to do
}
////////////////////////////////////////////////////////////
Vector3f SensorImpl::update()
{
Vector3f value;
CMMotionManager* manager = [SFAppDelegate getInstance].motionManager;
switch (m_sensor)
{
case Sensor::Accelerometer:
// Acceleration is given in G, convert to m/s^2
value.x = manager.accelerometerData.acceleration.x * 9.81f;
value.y = manager.accelerometerData.acceleration.y * 9.81f;
value.z = manager.accelerometerData.acceleration.z * 9.81f;
break;
case Sensor::Gyroscope:
// Rotation rates are given in rad/s, convert to deg/s
value.x = toDegrees(manager.gyroData.rotationRate.x);
value.y = toDegrees(manager.gyroData.rotationRate.y);
value.z = toDegrees(manager.gyroData.rotationRate.z);
break;
case Sensor::Magnetometer:
// Magnetic field is given in microteslas
value.x = manager.magnetometerData.magneticField.x;
value.y = manager.magnetometerData.magneticField.y;
value.z = manager.magnetometerData.magneticField.z;
break;
case Sensor::UserAcceleration:
// User acceleration is given in G, convert to m/s^2
value.x = manager.deviceMotion.userAcceleration.x * 9.81f;
value.y = manager.deviceMotion.userAcceleration.y * 9.81f;
value.z = manager.deviceMotion.userAcceleration.z * 9.81f;
break;
case Sensor::Orientation:
// Absolute rotation (Euler) angles are given in radians, convert to degrees
value.x = toDegrees(manager.deviceMotion.attitude.yaw);
value.y = toDegrees(manager.deviceMotion.attitude.pitch);
value.z = toDegrees(manager.deviceMotion.attitude.roll);
break;
default:
break;
}
return value;
}
////////////////////////////////////////////////////////////
void SensorImpl::setEnabled(bool enabled)
{
// Don't do anything if the state is the same
if (enabled == m_enabled)
return;
switch (m_sensor)
{
case Sensor::Accelerometer:
if (enabled)
[[SFAppDelegate getInstance].motionManager startAccelerometerUpdates];
else
[[SFAppDelegate getInstance].motionManager stopAccelerometerUpdates];
break;
case Sensor::Gyroscope:
if (enabled)
[[SFAppDelegate getInstance].motionManager startGyroUpdates];
else
[[SFAppDelegate getInstance].motionManager stopGyroUpdates];
break;
case Sensor::Magnetometer:
if (enabled)
[[SFAppDelegate getInstance].motionManager startMagnetometerUpdates];
else
[[SFAppDelegate getInstance].motionManager stopMagnetometerUpdates];
break;
case Sensor::Gravity:
case Sensor::UserAcceleration:
case Sensor::Orientation:
// these 3 sensors all share the same implementation, so we must disable
// it only if the three sensors are disabled
if (enabled)
{
if (deviceMotionEnabledCount == 0)
[[SFAppDelegate getInstance].motionManager startDeviceMotionUpdates];
deviceMotionEnabledCount++;
}
else
{
deviceMotionEnabledCount--;
if (deviceMotionEnabledCount == 0)
[[SFAppDelegate getInstance].motionManager stopDeviceMotionUpdates];
}
break;
default:
break;
}
// Update the enable state
m_enabled = enabled;
}
} // namespace priv
} // namespace sf
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