spacenavigator.py

import gremlin

# Device decorator
spacenavigator = gremlin.input_devices.JoystickDecorator(
    "SpaceNavigator",
    1828988614,
    "Default"
)

# Store the last reported values of each axis for delta value computations
g_last_values = [0, 0, 0, 0, 0, 0, 0]

# Compute delta and set vjoy axis values
def process_event(axis_id, value, vjoy):
    global g_last_values
    delta = value - g_last_values[axis_id]

    # If the delta is too large, due to overflow we simply ignore the event
    if abs(delta) > 0.5:
        return

    # Limit the delta value to the range [-0.1, 0.1] as this is what the
    # device seems to adhere to range wise
    delta = min(0.1, max(-0.1, delta))
    
    # Set the axis value, multiplying by 10 to get into the range [-1, 1]
    # which is what normally is expected by Gremlin
    vjoy[1].axis(axis_id).value = delta * 10.0

    # Store the latest value for the next iteration
    g_last_values[axis_id] = value


# Callbacks for the individual axis of the device
@spacenavigator.axis(1)
def axis1(event, vjoy):
    process_event(1, event.value, vjoy)

@spacenavigator.axis(2)
def axis2(event, vjoy):
    process_event(2, event.value, vjoy)

@spacenavigator.axis(3)
def axis3(event, vjoy):
    process_event(3, event.value, vjoy)

@spacenavigator.axis(4)
def axis4(event, vjoy):
    process_event(4, event.value, vjoy)

@spacenavigator.axis(5)
def axis5(event, vjoy):
    process_event(5, event.value, vjoy)

@spacenavigator.axis(6)
def axis6(event, vjoy):
    process_event(6, event.value, vjoy)