Class: CMAttitude

Inherits:
NSObject show all

Overview

An instance of the CMAttitude class represents a measurement of the device’s attitude at a point in time. “Attitude” refers to the orientation of a body relative to a given frame of reference.

Instance Attribute Summary (collapse)

Instance Method Summary (collapse)

Methods inherited from NSObject

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Constructor Details

This class inherits a constructor from NSObject

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class NSObject

Instance Attribute Details

- (Float) pitch (readonly)

The pitch of the device, in radians. (read-only) A pitch is a rotation around a lateral axis that passes through the device from side to side.

Returns:

- (CMQuaternion) quaternion (readonly)

Returns a quaternion representing the device’s attitude. (read-only) See the discussion of the CMQuaternion type in “Constants” for further information.

Returns:

- (Float) roll (readonly)

The roll of the device, in radians. (read-only) A roll is a rotation around a longitudinal axis that passes through the device from its top to bottom.

Returns:

- (CMRotationMatrix) rotationMatrix (readonly)

Returns a rotation matrix representing the device's attitude. (read-only) A rotation matrix in linear algebra describes the rotation of a body in three-dimensional Euclidean space.

Returns:

- (Float) yaw (readonly)

The yaw of the device, in radians. (read-only) A yaw is a rotation around an axis that runs vertically through the device. It is perpendicular to the body of the device, with its origin at the center of gravity and directed toward the bottom of the device.

Returns:

Instance Method Details

- (Object) multiplyByInverseOfAttitude(attitude)

Yields the change in attitude given a specific attitude. This method multiplies the inverse of the specified CMAttitude object by the attitude represented by the receiving object. It replaces the receiving instance with the attitude change relative to the object passed in attitude. You should cache the CMAttitude instance you want to use as a reference and pass that object as the argument to subsequent calls of this method.

Parameters:

  • attitude (CMAttitude)

    An object representing the device’s attitude at a given moment of measurement.

Returns: