166 lines
6.5 KiB
Python
166 lines
6.5 KiB
Python
import queue
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import logging
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from pyaxidraw import axidraw
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from queue import Queue
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from threading import Event, Lock
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from sorteerhoed.Signal import Signal
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import time
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class Plotter:
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def __init__(self, config, eventQ: Queue, runningEvent: Event, scannerLock: Lock):
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#TODO: scanningEvent -> CentralManagement.isScanning -> prevent plotter move during scan, failsafe
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self.config = config
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self.eventQ = eventQ
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self.q = Queue()
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self.isRunning = runningEvent
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self.logger = logging.getLogger("sorteerhoed").getChild("plotter")
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self.pen_down = False
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self.plotWidth = self.config['scanner']['width'] / 10 / 2.54
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self.plotHeight = self.config['scanner']['height'] / 10 / 2.54
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self.xPadding = self.config['scanner']['left_padding'] / 10 / 2.54;
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self.yPadding = self.config['scanner']['top_padding'] / 10 / 2.54;
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self.logger.info(f"Paddings x: {self.xPadding} inch y: {self.yPadding} inch")
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self.scannerLock = scannerLock
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self.goPark = False
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self.locked = False
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self.ad = None
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def park(self):
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self.logger.info("Queue to park plotter")
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self.goPark = True
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self.q.put([(-1/2.54)/self.plotWidth,0,0])
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def start(self):
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try:
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if not self.config['dummy_plotter']:
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self.ad = axidraw.AxiDraw()
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self.ad.interactive()
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# self.ad.plot_path()
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connected = self.ad.connect()
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if not connected:
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raise Exception("Cannot connect to Axidraw")
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# self.ad.options.units = 1 # set to use centimeters instead of inches
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self.ad.options.accel = 100;
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self.ad.options.speed_penup = 100
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self.ad.options.speed_pendown = 100
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self.ad.options.model = 1 # 2 for A3, 1 for A4
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self.ad.moveto(0,0)
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# plotterWidth = 25
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# plotterHeight = 21
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else:
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self.ad = None
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self.axiDrawCueListener()
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except Exception as e:
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self.logger.exception(e)
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finally:
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self.logger.warning("Close Axidraw connection")
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if self.ad:
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with self.scannerLock:
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self.ad.moveto(0,0)
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self.ad.disconnect()
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self.logger.critical("Clear running Event")
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# send shutdown signal (if not already set)
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self.isRunning.clear()
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def draw_segments(self, segments = []):
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if not self.locked:
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# acquire lock if not already done so
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self.scannerLock.acquire()
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self.locked = True
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coordinates = []
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for segment in segments:
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coordinate = [
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# mm to cm to inches
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(segment[0]) * self.plotWidth,
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(1-segment[1]) * self.plotHeight
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]
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#prevent drawing when not in drwaing area
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# this is a failsafe for a malicious working or glitching script, as this should also be done in the javascript
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if self.pen_down:
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if coordinate[0] < self.xPadding or coordinate[0] > self.xPadding+self.plotWidth or \
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coordinate[1] < self.yPadding or coordinate[1] > self.yPadding + self.plotHeight:
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self.logger.warn(f"Skip drawing for: {coordinates} out of bounds")
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continue
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coordinates.append(coordinate)
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self.logger.debug(f"Plot: {coordinates}")
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if self.ad:
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if len(coordinates) < 2:
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self.info("Plot single point (park?)")
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self.ad.moveto(coordinates[0][0], coordinates[0][1])
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else:
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self.ad.plan_trajectory(coordinates)
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# self.ad.moveto(move[0]* plotterWidth, move[1]*plotterHeight)
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# self.logger.debug(f'handler! {move}')
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pass
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def setPenDown(self, pen_state):
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"""
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False: pen raised, True: pen_lower
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"""
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if pen_state != self.pen_down:
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self.pen_down = pen_state
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self.logger.info("Changed pen: {}".format('down' if pen_state else 'up'))
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if self.ad:
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if pen_state:
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self.ad.pen_lower()
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else:
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self.ad.pen_raise()
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return True
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return False
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def axiDrawCueListener(self):
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plotterRan = False
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segments = []
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while self.isRunning.is_set():
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# TODO: queue that collects a part of the path data
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# on a specific limit or on a specific time interval, do the plot
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# also, changing ad.pen_raise() or ad.pen_lower() trigger a new segment
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# Plot with ad.plan_trajectory() ??
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try:
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# if no info comes in for .5sec, plot that segment
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segment = self.q.get(True, .5)
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# change of pen state? draw previous segments!
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if (segment[2] == 1 and not self.pen_down) or (segment[2] == 0 and self.pen_down) or len(segments) > 150:
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if len(segments):
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self.draw_segments(segments)
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plotterRan = True
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segments = [] #reset
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# and change pen positions
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self.setPenDown(segment[2] == 1)
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segments.append(segment)
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except queue.Empty as e:
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self.logger.debug("Timeout queue.")
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if len(segments):
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# segments to plot!
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self.draw_segments(segments)
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plotterRan = True
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segments = []
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elif plotterRan:
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plotterRan = False
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self.eventQ.put(Signal('plotter.finished'))
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if self.goPark:
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self.eventQ.put(Signal('plotter.parked'))
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if self.locked:
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self.scannerLock.release()
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self.locked = False
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self.goPark = False
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# else:
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# time.sleep(.05)
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# self.logger.debug(f'Plotter move: {move}')
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self.logger.info("Stopping plotter")
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