NAME¶

SDL_SensorType - The different sensors defined by SDL.

SYNOPSIS¶

#include <SDL3/SDL_sensor.h>

typedef enum SDL_SensorType
{
    SDL_SENSOR_INVALID = -1,    /**< Returned for an invalid sensor */
    SDL_SENSOR_UNKNOWN,         /**< Unknown sensor type */
    SDL_SENSOR_ACCEL,           /**< Accelerometer */
    SDL_SENSOR_GYRO,            /**< Gyroscope */
    SDL_SENSOR_ACCEL_L,         /**< Accelerometer for left Joy-Con controller and Wii nunchuk */
    SDL_SENSOR_GYRO_L,          /**< Gyroscope for left Joy-Con controller */
    SDL_SENSOR_ACCEL_R,         /**< Accelerometer for right Joy-Con controller */
    SDL_SENSOR_GYRO_R           /**< Gyroscope for right Joy-Con controller */
} SDL_SensorType;

DESCRIPTION¶

Additional sensors may be available, using platform dependent semantics.

Here are the additional Android sensors:

https://developer.android.com/reference/android/hardware/SensorEvent.html#values

Accelerometer sensor notes:

The accelerometer returns the current acceleration in SI meters per second squared. This measurement includes the force of gravity, so a device at rest will have an value of SDL_STANDARD_GRAVITY away from the center of the earth, which is a positive Y value.

• values[0]: Acceleration on the x axis

• values[1]: Acceleration on the y axis

• values[2]: Acceleration on the z axis

For phones and tablets held in natural orientation and game controllers held in front of you, the axes are defined as follows:

• -X ... +X : left ... right

• -Y ... +Y : bottom ... top

• -Z ... +Z : farther ... closer

The accelerometer axis data is not changed when the device is rotated.

Gyroscope sensor notes:

The gyroscope returns the current rate of rotation in radians per second. The rotation is positive in the counter-clockwise direction. That is, an observer looking from a positive location on one of the axes would see positive rotation on that axis when it appeared to be rotating counter-clockwise.

• values[0]: Angular speed around the x axis (pitch)

• values[1]: Angular speed around the y axis (yaw)

• values[2]: Angular speed around the z axis (roll)

For phones and tablets held in natural orientation and game controllers held in front of you, the axes are defined as follows:

• -X ... +X : left ... right

• -Y ... +Y : bottom ... top

• -Z ... +Z : farther ... closer

The gyroscope axis data is not changed when the device is rotated.

AVAILABILITY¶

This enum is available since SDL 3.2.0.

SEE ALSO¶

SDL_GetCurrentDisplayOrientation(3)