Accelerometers

• Input that detects movement and orientation; e.g. the wiimote
• Use 'relative' inputs as numbers
  • Acceleration along the x,y, and z axes up to 3g (gravity force, where 1 G = earth gravity)
  • For example: if pointed upwards, will have 1g along the Y axis, 0g along the z axis

Common HID (Human Interface Device) code features

• Deadzones
• Analog input filtering
  • low-pass filter or running average
• Event detection
• button sequences (combos) or multi-button presses at the same time (chords)
• gesture detection
• multi-controller support
• Multi-platform abstraction *cross platform support for different controller types
• Input remappiong
• Context-sensitive input
• Input disabling (e.g. for cutscenes)

Button sequence detection (e.g. fighting game button combo)

• Keep a history of the last pressed button in the expected sequence and the time it was pressed
• When the next button in the sequence is pressed
  • If the button was pressed within the time limit, update the sequence
  • else reset the sequence to the beginning (sequence failed)