def process_ver_scanline(self, scanline):
if DEBUG_POLYGONEXTRACTOR3:
prev = None
for p in scanline:
if p.dir == 0:
self.cont.fill("red")
else:
self.cont.fill("blue")
self.cont.AddDot(p[0], p[1])
self.cont.fill("black")
self.cont.AddText(p[0], p[1], str(p.id))
if prev:
self.cont.AddLine(prev[0], prev[1], p[0], p[1])
prev = p
if DEBUG_POLYGONEXTRACTOR:
last = 0
inside = False
s = ""
for point in scanline:
next_y = point[1]
if inside:
s += "*" * int(next_y - last)
else:
s += " " * int(next_y - last)
last = next_y
inside = not inside
print(s)
if DEBUG_POLYGONEXTRACTOR:
print("active paths: "),
for path in self.curr_path_list:
print("%d(%g,%g)" %
(path.id, path.points[-1][0], path.points[-1][1])),
print()
print("prev points: "),
for point in self.prev_line:
print("(%g,%g)" % (point[0], point[1])),
print()
print("active points: "),
for point in scanline:
print("%d(%g,%g)" % (point.id, point[0], point[1])),
print()
prev_point = Iterator(self.prev_line)
curr_point = Iterator(scanline)
curr_path = Iterator(self.curr_path_list)
winding = 0
while (prev_point.remains() > 0) or (curr_point.remains() > 0):
if DEBUG_POLYGONEXTRACTOR:
print("num_prev=%d, num_curr=%d" %
(prev_point.remains(), curr_point.remains()))
if (prev_point.remains() == 0) and (curr_point.remains() >= 2):
c0 = next(curr_point)
c1 = next(curr_point)
# new path starts
p0 = Path()
p0.winding = winding + 1
if DEBUG_POLYGONEXTRACTOR:
print("new path %d(%g,%g)" % (p0.id, c0[0], c0[1]))
p0.append(c0)
self.curr_path_list.append(p0)
p1 = Path()
p1.winding = winding
if DEBUG_POLYGONEXTRACTOR:
print("new path %d(%g,%g)" % (p1.id, c1[0], c1[1]))
p1.append(c1)
self.curr_path_list.append(p1)
p0.top_join = p1
p1.top_join = p0
continue
if (prev_point.remains() >= 2) and (curr_point.remains() == 0):
# old path ends
p0 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print("end path %d" % p0.id)
self.all_path_list.append(p0)
next(prev_point)
p1 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print("end path %d" % p1.id)
self.all_path_list.append(p1)
next(prev_point)
p0.bot_join = p1
p1.bot_join = p0
continue
if (prev_point.remains() >= 2) and (curr_point.remains() >= 2):
p0 = prev_point.peek(0)
p1 = prev_point.peek(1)
c0 = curr_point.peek(0)
c1 = curr_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print("overlap test: p0=%g p1=%g" % (p0[0], p1[0]))
print("overlap test: c0=%g c1=%g" % (c0[0], c1[0]))
if c1[1] < p0[1]:
# new segment is completely to the left
# new path starts
s0 = Path()
if DEBUG_POLYGONEXTRACTOR:
print("new path %d(%g,%g) w=%d" %
(s0.id, c0[0], c0[1], winding + 1))
s0.append(c0)
curr_path.insert(s0)
s1 = Path()
s0.winding = winding + 1
s1.winding = winding
if DEBUG_POLYGONEXTRACTOR:
print("new path %d(%g,%g) w=%d" %
(s1.id, c1[0], c1[1], winding))
s1.append(c1)
curr_path.insert(s1)
next(curr_point)
next(curr_point)
s0.top_join = s1
s1.top_join = s0
elif c0[1] > p1[1]:
# new segment is completely to the right
# old path ends
s0 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print("end path %d" % s0.id)
self.all_path_list.append(s0)
next(prev_point)
s1 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print("end path %d" % s1.id)
self.all_path_list.append(s1)
next(prev_point)
s0.bot_join = s1
s1.bot_join = s0
winding = s1.winding
else:
# new segment is overlapping
left_path = next(curr_path)
right_path = curr_path.peek()
left_point = c0
right_point = c1
winding = left_path.winding
next(curr_point)
next(prev_point)
overlap_p = True
overlap_c = True
while overlap_c or overlap_p:
overlap_p = False
overlap_c = False
# check for path joins
if prev_point.remains() >= 2:
p2 = prev_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print("join test: p0=%g p1=%g p2=%g" %
(p0[0], p1[0], p2[0]))
print("join test: c0=%g c1=%g" %
(c0[0], c1[0]))
if p2[1] <= c1[1]:
overlap_p = True
if self.policy == PolygonExtractor.CONTOUR:
s0 = curr_path.takeNext()
s1 = curr_path.takeNext()
if curr_path.remains() >= 1:
right_path = curr_path.peek()
self.all_path_list.append(s0)
self.all_path_list.append(s1)
if DEBUG_POLYGONEXTRACTOR:
print("path %d joins %d" %
(s0.id, s1.id))
s0.bot_join = s1
s1.bot_join = s0
elif self.policy == PolygonExtractor.MONOTONE:
s0 = curr_path.takeNext()
left_path.bot_join = s0
s0.bot_join = left_path
if DEBUG_POLYGONEXTRACTOR:
print("path %d joins %d" %
(left_path.id, s0.id))
curr_path.remove(left_path)
self.all_path_list.append(left_path)
self.all_path_list.append(s0)
s1 = next(curr_path)
left_path = s1
right_path = curr_path.peek()
next(prev_point)
next(prev_point)
winding = s1.winding
p0 = p2
if prev_point.remains() >= 1:
p1 = prev_point.peek(0)
else:
overlap_p = False
# check for path splits
if curr_point.remains() >= 2:
c2 = curr_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print("split test: p0=%g p1=%g" %
(p0[0], p1[0]))
print("split test: c0=%g c1=%g c2=%g" %
(c0[0], c1[0], c2[0]))
if c2[1] <= p1[1]:
overlap_c = True
s0 = Path()
s1 = Path()
s0.winding = winding + 1
s1.winding = winding
s0.top_join = s1
s1.top_join = s0
if DEBUG_POLYGONEXTRACTOR:
print(
"region split into %d and %d (w=%d)" %
(s0.id, s1.id, winding + 1))
next(curr_point)
c0 = next(curr_point)
if self.policy == PolygonExtractor.CONTOUR:
s0.append(c1)
curr_path.insert(s0)
s1.append(c2)
curr_path.insert(s1)
elif self.policy == PolygonExtractor.MONOTONE:
s0.append(left_point)
s1.append(c1)
curr_path.insertBefore(s0)
curr_path.insertBefore(s1)
left_point = c2
if curr_point.remains() >= 1:
c1 = curr_point.peek(0)
right_point = c1
else:
overlap_c = False
if DEBUG_POLYGONEXTRACTOR:
print("add to path %d(%g,%g)" %
(left_path.id, left_point[0], left_point[1]))
left_path.append(left_point)
right_path.append(right_point)
if right_path == curr_path.peek():
next(curr_path)
if DEBUG_POLYGONEXTRACTOR:
print("add to path %d(%g,%g)" %
(right_path.id, right_point[0], right_point[1]))
winding = right_path.winding
next(prev_point)
next(curr_point)
if DEBUG_POLYGONEXTRACTOR:
output = "active paths: "
for path in self.curr_path_list:
output += "%d(%g,%g,w=%d)" % (path.id, path.points[-1][0],
path.points[-1][1], path.winding)
print(output)
self.prev_line = scanline
def process_ver_scanline(self, scanline):
if DEBUG_POLYGONEXTRACTOR3:
prev = None
for p in scanline:
if p.dir == 0:
self.cont.fill("red")
else:
self.cont.fill("blue")
self.cont.AddDot(p.x, p.y)
self.cont.fill("black")
self.cont.AddText(p.x, p.y, str(p.id))
if prev:
self.cont.AddLine(prev.x, prev.y, p.x, p.y)
prev = p
if DEBUG_POLYGONEXTRACTOR:
last = 0
inside = False
s = ""
for point in scanline:
next_y = point.y
if inside:
s += "*" * int(next_y - last)
else:
s += " " * int(next_y - last)
last = next_y
inside = not inside
print s
if DEBUG_POLYGONEXTRACTOR:
print "active paths: ",
for path in self.curr_path_list:
print "%d(%g,%g)" \
% (path.id, path.points[-1].x, path.points[-1].y),
print
print "prev points: ",
for point in self.prev_line:
print "(%g,%g)" % (point.x, point.y),
print
print "active points: ",
for point in scanline:
print "%d(%g,%g)" % (point.id, point.x, point.y),
print
prev_point = Iterator(self.prev_line)
curr_point = Iterator(scanline)
curr_path = Iterator(self.curr_path_list)
winding = 0
while (prev_point.remains() > 0) or (curr_point.remains() > 0):
if DEBUG_POLYGONEXTRACTOR:
print "num_prev=%d, num_curr=%d" \
% (prev_point.remains(), curr_point.remains())
if (prev_point.remains() == 0) and (curr_point.remains() >= 2):
c0 = curr_point.next()
c1 = curr_point.next()
# new path starts
p0 = Path()
p0.winding = winding + 1
if DEBUG_POLYGONEXTRACTOR:
print "new path %d(%g,%g)" % (p0.id, c0.x, c0.y)
p0.append(c0)
self.curr_path_list.append(p0)
p1 = Path()
p1.winding = winding
if DEBUG_POLYGONEXTRACTOR:
print "new path %d(%g,%g)" % (p1.id, c1.x, c1.y)
p1.append(c1)
self.curr_path_list.append(p1)
p0.top_join = p1
p1.top_join = p0
continue
if (prev_point.remains() >= 2) and (curr_point.remains() == 0):
#old path ends
p0 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print "end path %d" % p0.id
self.all_path_list.append(p0)
prev_point.next()
p1 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print "end path %d" % p1.id
self.all_path_list.append(p1)
prev_point.next()
p0.bot_join = p1
p1.bot_join = p0
continue
if (prev_point.remains() >= 2) and (curr_point.remains() >= 2):
p0 = prev_point.peek(0)
p1 = prev_point.peek(1)
c0 = curr_point.peek(0)
c1 = curr_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print "overlap test: p0=%g p1=%g" % (p0.x, p1.x)
print "overlap test: c0=%g c1=%g" % (c0.x, c1.x)
if c1.y < p0.y:
# new segment is completely to the left
# new path starts
s0 = Path()
if DEBUG_POLYGONEXTRACTOR:
print "new path %d(%g,%g) w=%d" \
% (s0.id, c0.x, c0.y, winding + 1)
s0.append(c0)
curr_path.insert(s0)
s1 = Path()
s0.winding = winding + 1
s1.winding = winding
if DEBUG_POLYGONEXTRACTOR:
print "new path %d(%g,%g) w=%d" \
% (s1.id, c1.x, c1.y, winding)
s1.append(c1)
curr_path.insert(s1)
curr_point.next()
curr_point.next()
s0.top_join = s1
s1.top_join = s0
elif c0.y > p1.y:
# new segment is completely to the right
# old path ends
s0 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print "end path %d" % s0.id
self.all_path_list.append(s0)
prev_point.next()
s1 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print "end path %d" % s1.id
self.all_path_list.append(s1)
prev_point.next()
s0.bot_join = s1
s1.bot_join = s0
winding = s1.winding
else:
# new segment is overlapping
left_path = curr_path.next()
right_path = curr_path.peek()
left_point = c0
right_point = c1
winding = left_path.winding
curr_point.next()
prev_point.next()
overlap_p = True
overlap_c = True
while overlap_c or overlap_p:
overlap_p = False
overlap_c = False
# check for path joins
if prev_point.remains() >= 2:
p2 = prev_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print "join test: p0=%g p1=%g p2=%g" \
% (p0.x, p1.x, p2.x)
print "join test: c0=%g c1=%g" % (c0.x, c1.x)
if p2.y <= c1.y:
overlap_p = True
if self.policy == PolygonExtractor.CONTOUR:
s0 = curr_path.takeNext()
s1 = curr_path.takeNext()
if curr_path.remains() >= 1:
right_path = curr_path.peek()
self.all_path_list.append(s0)
self.all_path_list.append(s1)
if DEBUG_POLYGONEXTRACTOR:
print "path %d joins %d" \
% (s0.id, s1.id)
s0.bot_join = s1
s1.bot_join = s0
elif self.policy == PolygonExtractor.MONOTONE:
s0 = curr_path.takeNext()
left_path.bot_join = s0
s0.bot_join = left_path
if DEBUG_POLYGONEXTRACTOR:
print "path %d joins %d" \
% (left_path.id, s0.id)
curr_path.remove(left_path)
self.all_path_list.append(left_path)
self.all_path_list.append(s0)
s1 = curr_path.next()
left_path = s1
right_path = curr_path.peek()
prev_point.next()
prev_point.next()
winding = s1.winding
p0 = p2
if prev_point.remains() >= 1:
p1 = prev_point.peek(0)
else:
overlap_p = False
# check for path splits
if curr_point.remains()>=2:
c2 = curr_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print "split test: p0=%g p1=%g" % (p0.x, p1.x)
print "split test: c0=%g c1=%g c2=%g" \
% (c0.x, c1.x, c2.x)
if c2.y <= p1.y:
overlap_c = True
s0 = Path()
s1 = Path()
s0.winding = winding + 1
s1.winding = winding
s0.top_join = s1
s1.top_join = s0
if DEBUG_POLYGONEXTRACTOR:
print "region split into %d and %d (w=%d)" \
% (s0.id, s1.id, winding + 1)
curr_point.next()
c0 = curr_point.next()
if self.policy == PolygonExtractor.CONTOUR:
s0.append(c1)
curr_path.insert(s0)
s1.append(c2)
curr_path.insert(s1)
elif self.policy == PolygonExtractor.MONOTONE:
s0.append(left_point)
s1.append(c1)
curr_path.insertBefore(s0)
curr_path.insertBefore(s1)
left_point = c2
if curr_point.remains() >= 1:
c1 = curr_point.peek(0)
right_point = c1
else:
overlap_c = False
if DEBUG_POLYGONEXTRACTOR:
print "add to path %d(%g,%g)" \
% (left_path.id, left_point.x, left_point.y)
left_path.append(left_point)
right_path.append(right_point)
if right_path == curr_path.peek():
curr_path.next()
if DEBUG_POLYGONEXTRACTOR:
print "add to path %d(%g,%g)" \
% (right_path.id, right_point.x, right_point.y)
winding = right_path.winding
prev_point.next()
curr_point.next()
if DEBUG_POLYGONEXTRACTOR:
print "active paths: ",
for path in self.curr_path_list:
print "%d(%g,%g,w=%d)" % (path.id, path.points[-1].x,
path.points[-1].y, path.winding),
print
self.prev_line = scanline
def process_hor_scanline(self, scanline):
if DEBUG_POLYGONEXTRACTOR:
last = 0
inside = False
s = ""
for point in scanline:
next_x = point.x
if inside:
s += "*" * int(next_x - last)
else:
s += " " * int(next_x - last)
last = next_x
inside = not inside
print s
if DEBUG_POLYGONEXTRACTOR:
print "active paths: ",
for path in self.curr_path_list:
print "%d(%g,%g)" \
% (path.id, path.points[-1].x, path.points[-1].y),
print
print "prev points: ",
for point in self.prev_line:
print "(%g,%g)" % (point.x, point.y),
print
print "active points: ",
for point in scanline:
print "%d(%g,%g)" % (point.id, point.x, point.y),
print
prev_point = Iterator(self.prev_line)
curr_point = Iterator(scanline)
curr_path = Iterator(self.curr_path_list)
winding = 0
while (prev_point.remains() > 0) or (curr_point.remains() > 0):
if DEBUG_POLYGONEXTRACTOR:
print "num_prev=%d, num_curr=%d" \
% (prev_point.remains(), curr_point.remains())
if (prev_point.remains() == 0) and (curr_point.remains() >= 2):
c0 = curr_point.next()
c1 = curr_point.next()
# new path starts
p0 = Path()
p0.winding = winding + 1
if DEBUG_POLYGONEXTRACTOR:
print "new path %d(%g,%g)" % (p0.id, c0.x, c0.y)
p0.append(c0)
self.curr_path_list.append(p0)
p1 = Path()
p1.winding = winding
if DEBUG_POLYGONEXTRACTOR:
print "new path %d(%g,%g)" % (p1.id, c1.x, c1.y)
p1.append(c1)
self.curr_path_list.append(p1)
p0.top_join = p1
p1.top_join = p0
continue
if (prev_point.remains() >= 2) and (curr_point.remains() == 0):
#old path ends
p0 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print "end path %d" % p0.id
self.all_path_list.append(p0)
prev_point.next()
p1 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print "end path %d" % p1.id
self.all_path_list.append(p1)
prev_point.next()
p0.bot_join = p1
p1.bot_join = p0
continue
if (prev_point.remains() >= 2) and (curr_point.remains() >= 2):
p0 = prev_point.peek(0)
p1 = prev_point.peek(1)
c0 = curr_point.peek(0)
c1 = curr_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print "overlap test: p0=%g p1=%g" % (p0.x, p1.x)
print "overlap test: c0=%g c1=%g" % (c0.x, c1.x)
if c1.x < p0.x:
# new segment is completely to the left
# new path starts
s0 = Path()
if DEBUG_POLYGONEXTRACTOR:
print "new path %d(%g,%g) w=%d" \
% (s0.id, c0.x, c0.y, winding + 1)
s0.append(c0)
curr_path.insert(s0)
s1 = Path()
s0.winding = winding + 1
s1.winding = winding
if DEBUG_POLYGONEXTRACTOR:
print "new path %d(%g,%g) w=%d" \
% (s1.id, c1.x, c1.y, winding)
s1.append(c1)
curr_path.insert(s1)
curr_point.next()
curr_point.next()
s0.top_join = s1
s1.top_join = s0
elif c0.x > p1.x:
# new segment is completely to the right
# old path ends
s0 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print "end path %d" % s0.id
self.all_path_list.append(s0)
prev_point.next()
s1 = curr_path.takeNext()
if DEBUG_POLYGONEXTRACTOR:
print "end path %d" % s1.id
self.all_path_list.append(s1)
prev_point.next()
s0.bot_join = s1
s1.bot_join = s0
winding = s1.winding
else:
# new segment is overlapping
left_path = curr_path.next()
right_path = curr_path.peek()
left_point = c0
right_point = c1
winding = left_path.winding
curr_point.next()
prev_point.next()
overlap_p = True
overlap_c = True
while overlap_c or overlap_p:
overlap_p = False
overlap_c = False
# check for path joins
if prev_point.remains() >= 2:
p2 = prev_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print "join test: p0=%g p1=%g p2=%g" \
% (p0.x, p1.x, p2.x)
print "join test: c0=%g c1=%g" % (c0.x, c1.x)
if p2.x <= c1.x:
overlap_p = True
if self.policy == PolygonExtractor.CONTOUR:
s0 = curr_path.takeNext()
s1 = curr_path.takeNext()
if curr_path.remains() >= 1:
right_path = curr_path.peek()
self.all_path_list.append(s0)
self.all_path_list.append(s1)
if DEBUG_POLYGONEXTRACTOR:
print "path %d joins %d" \
% (s0.id, s1.id)
s0.bot_join = s1
s1.bot_join = s0
elif self.policy == PolygonExtractor.MONOTONE:
s0 = curr_path.takeNext()
left_path.bot_join = s0
s0.bot_join = left_path
if DEBUG_POLYGONEXTRACTOR:
print "path %d joins %d" \
% (left_path.id, s0.id)
curr_path.remove(left_path)
self.all_path_list.append(left_path)
self.all_path_list.append(s0)
s1 = curr_path.next()
left_path = s1
right_path = curr_path.peek()
prev_point.next()
prev_point.next()
winding = s1.winding
p0 = p2
if prev_point.remains() >= 1:
p1 = prev_point.peek(0)
else:
overlap_p = False
# check for path splits
if curr_point.remains() >= 2:
c2 = curr_point.peek(1)
if DEBUG_POLYGONEXTRACTOR:
print "split test: p0=%g p1=%g" % (p0.x, p1.x)
print "split test: c0=%g c1=%g c2=%g" \
% (c0.x, c1.x, c2.x)
if c2.x <= p1.x:
overlap_c = True
s0 = Path()
s1 = Path()
s0.winding = winding + 1
s1.winding = winding
s0.top_join = s1
s1.top_join = s0
if DEBUG_POLYGONEXTRACTOR:
print "region split into %d and %d (w=%d)" \
% (s0.id, s1.id, winding + 1)
curr_point.next()
c0 = curr_point.next()
if self.policy == PolygonExtractor.CONTOUR:
s0.append(c1)
curr_path.insert(s0)
s1.append(c2)
curr_path.insert(s1)
elif self.policy == PolygonExtractor.MONOTONE:
s0.append(left_point)
s1.append(c1)
curr_path.insertBefore(s0)
curr_path.insertBefore(s1)
left_point = c2
if curr_point.remains() >= 1:
c1 = curr_point.peek(0)
right_point = c1
else:
overlap_c = False
if DEBUG_POLYGONEXTRACTOR:
print "add to path %d(%g,%g)" \
% (left_path.id, left_point.x, left_point.y)
left_path.append(left_point)
right_path.append(right_point)
if right_path == curr_path.peek():
curr_path.next()
if DEBUG_POLYGONEXTRACTOR:
print "add to path %d(%g,%g)" \
% (right_path.id, right_point.x, right_point.y)
winding = right_path.winding
prev_point.next()
curr_point.next()
if DEBUG_POLYGONEXTRACTOR:
print "active paths: ",
for path in self.curr_path_list:
print "%d(%g,%g,w=%d)" % (path.id, path.points[-1].x,
path.points[-1].y, path.winding),
print
self.prev_line = scanline