RectStartPoint class

This is a specific implementation of StartPoint that shows a rectangular “start” area, and expects the movement to start in an upward direction.

The differences between the basic StartPoint and this class are:

• The present class also creates the visual rectangle to display on screen. The rectangle is created with default visual properties and you can modify it later (access it via start_area )
• Consequently, unlike StartPoint the present class does not allow defining the start & exit area flexibly.
• The present class lets you also tilt the rectangle (rotation)

Methods and properties:

class trajtracker.movement.RectStartPoint(size=None, position=(0, 0), rotation=0, colour=(200, 200, 200), can_exit_in_any_direction=False)

__init__(size=None, position=(0, 0), rotation=0, colour=(200, 200, 200), can_exit_in_any_direction=False)

can_exit_in_any_direction

Whether the finger/mouse can exit the “start” rectangle in any direction (True) or only upwards (False)

This property cannot be updated after the start point was preloaded

check_xy(x_coord, y_coord)

See StartPoint.check_xy()

colour

Color of the start rectangle :type: tuple (red, green, blue)

log_level

Logging level of this object: trajtracker.log_none, log_error (default), log_warn, log_info, log_debug, log_trace

mark_as_initialized()

See StartPoint.mark_as_initialized()

position

The position of the “start” rectangle on screen

This property cannot be updated after the start point was preloaded

Type:(x,y) tuple

preload()

Prepare the stimuli.

Once this is done, you cannot modify size , position , and rotation

This method is automatically called if you call reset() or check_xy(), however, it is a better practice to call it yourself before the experiment starts, because the method is more time-consuming than other methods.

reset()

See StartPoint.reset()

rotation

The tilt of the start rectangle, in degrees (positive number = clockwise)

This property cannot be updated after the start point was preloaded

size

The size of the “start” rectangle.

This property cannot be updated after the start point was preloaded

Type:(x,y) tuple

start_area

Access the visual rectangle stimulus (an expyriment.stimuli.Rectangle object) - allows modifying its properties.

Note: changing the size/position of this rectangle may result in unexpected behavior

state

See StartPoint.state

wait_until_exit(exp, on_loop_callback=None, on_loop_present=None, event_manager=None, trial_start_time=None, session_start_time=None, max_wait_time=None)

See StartPoint.wait_until_exit()

wait_until_startpoint_touched(exp, on_loop_callback=None, on_loop_present=None, event_manager=None, trial_start_time=None, session_start_time=None, max_wait_time=None)

See StartPoint.wait_until_startpoint_touched()