import?numpy?as?np
import?cv2

#?============================================================================

CANVAS_SIZE?=?（600800）
CANVAS_COLOR?=?（0?0?0）
FINAL_LINE_COLOR?=?（255?255?255）
FINAL_POLY_COLOR?=?（50?149?216）
WORKING_LINE_COLOR?=?（127?127?127）

#?============================================================================

class?PolygonDrawer（object）:
????def?__init__（self?window_name）:
????????self.window_name?=?window_name?#?Name?for?our?window
????????self.done?=?False?#?Flag?signalling?we‘re?done
????????self.innerdone?=?False?#Flag?signalling?inner?done
	self.cutdone?=?False?#?Flag?signalling?we‘re?done
	self.cutinnerdone?=?False?#?Flag?signalling?we‘re?done
	self.transform?=?False?#?Flag?transformation?is?done
????????self.current?=?（0?0）?#?Current?position?so?we?can?draw?the?line-in-progress
	self.cutcurrent?=?（0?0）?#?Current?position?so?we?can?draw?the?line-in-progress
????????self.points?=?[]?#?List?of?points?defining?our?polygon
????????self.innerpoints?=?[]?#List?of?inner?points?defining?out?polygon
	self.cutpoints?=?[]?#List?of?points?defining?our?cut-tube
	self.cutinnerpoints?=?[]?#List?of?points?definig?our?cutinner-tube


????def?on_mouse（self?event?x?y?buttons?user_param）:
????????#?Mouse?callback?that?gets?called?for?every?mouse?event?（i.e.?moving?clicking?etc.）

????????if?self.done:?#?Nothing?more?to?do
????????????return

????????if?event?==?cv2.EVENT_MOUSEMOVE:
????????????#?We?want?to?be?able?to?draw?the?line-in-progress?so?update?current?mouse?position
????????????self.current?=?（x?y）
????????elif?event?==?cv2.EVENT_LBUTTONDOWN:
????????????#?Left?click?means?adding?a?point?at?current?position?to?the?list?of?points
????????????print（“Adding?point?#%d?with?position（%d%d）“?%?（len（self.points）?x?y））
????????????self.points.append（（x?y））
????????elif?event?==?cv2.EVENT_RBUTTONDOWN:
????????????#?Right?click?means?we‘re?done
????????????print（“Completing?polygon?with?%d?points.“?%?len（self.points））
????????????self.done?=?True

????def?on_innermouse（self?event?x?y?buttons?user_param）:
????????#?Mouse?callback?that?gets?called?for?every?mouse?event?（i.e.?moving?clicking?etc.）

????????if?self.innerdone:?#?Nothing?more?to?do
????????????return

????????if?event?==?cv2.EVENT_MOUSEMOVE:
????????????#?We?want?to?be?able?to?draw?the?line-in-progress?so?update?current?mouse?position
????????????self.current?=?（x?y）
????????elif?event?==?cv2.EVENT_LBUTTONDOWN:
????????????#?Left?click?means?adding?a?point?at?current?position?to?the?list?of?points
????????????print（“Adding?inner?point?#%d?with?position（%d%d）“?%?（len（self.innerpoints）?x?y））
????????????self.innerpoints.append（（x?y））
????????elif?event?==?cv2.EVENT_RBUTTONDOWN:
????????????#?Right?click?means?we‘re?done
????????????print（“Completing?inner?polygon?with?%d?points.“?%?len（self.innerpoints））
????????????self.innerdone?=?True
????????????
????def?on_secmouse（sel