Accessory and information processing system
An example accessory can be attached to an information processing device. The accessory includes a housing, a movable operation section, and a movable portion. An inside of the housing is visible from an outside thereof through at least a portion thereof. At least a portion of the operation section is exposed on the outside of the housing. The movable portion is placed at a position inside the housing that is visible from the outside of the housing through the portion of the housing. A position and/or an attitude of the movable portion changes in response to the operation section being operated.
1. An information processing system including an information processing device having a camera, and an accessory to which information processing device is removably attachable, wherein:
the accessory includes:
a housing having an opening;
a movable operation section at least a portion of which is exposed on the outside of the housing; and
a movable portion placed at a position inside the housing, wherein a position and/or an attitude of the movable portion changes in response to the movable operation section being operated;
the information processing device is attached to the accessory at such a position that the camera can capture an image of the inside of the housing through the opening; and
one or more processor of the information processing system:
determines an operation performed on the movable operation section based on a camera image captured by the camera and including an image of the movable portion; and
performs a predetermined process based on the determined operation.
2. The information processing system according to claim 1 , wherein:
the processor determines whether or not the movable operation section is operated based on the camera image; and
the processor performs a predetermined process based on whether or not the movable operation section is operated.
3. The information processing system according to claim 1 , wherein:
the processor calculates an amount of operation performed on the movable operation section based on the camera image; and
the processor performs a predetermined process based on the amount of operation.
4. The information processing system according to claim 1 , wherein:
on the inside of the housing, a marker is provided at a position inside the housing, wherein the position at which the movable portion is provided is different from the position at which the marker is provided; and
the processor recognizes the marker in the camera image to determine an operation performed on the moveable operation section based on at least one of a position, a direction and a shape of an image of the movable portion with respect to the marker in the camera image.