Inside Macintosh: Apple Game Sprockets Guide /

Chapter 3 - InputSprocket / InputSprocket Reference

Data Structures

Axis Configuration Information Structure

The axis configuration information structure provides information used during configuration and in interpreting axis element data. For each element of kind kISpElementKind_Axis, the device driver fills out an axis configuration information structure, which is stored by InputSprocket. An axis configuration information structure is defined by the ISpAxisConfigurationInfo data type.

typedef struct {
   Boolean        SymetricAxis; 
} ISpAxisConfigurationInfo;

Field Description

SymetricAxis

This value is true if the axis has a meaningful center--for example, the axis of a joystick. In this case, 0 or idle falls at the kISpAxisMiddle position. This value is false if the axis has no meaningful center--for example, the axis of a brake or gas pedal.