def draw_line_brez_smoth(canvas, ps, pf, fill):
I = 100
fill = get_rgb_intensity(canvas, fill, "white", I)
dx = pf[0] - ps[0]
dy = pf[1] - ps[1]
sx = sign(dx)
sy = sign(dy)
dy = abs(dy)
dx = abs(dx)
if dy >= dx:
dx, dy = dy, dx
steep = 1 #
else:
steep = 0 #
tg = dy / dx * I # тангенс угла наклона (умножаем на инт., чтобы не приходилось умножать внутри цикла
e = I / 2 # интенсивность для высвечивания начального пикселя
w = I - tg # пороговое значение
x = ps[0]
y = ps[1]
stairs = []
st = 1
while x != pf[0] or y != pf[1]:
canvas.create_line(x, y, x + 1, y + 1, fill=fill[round(e) - 1])
if e < w:
if steep == 0: # dy < dx
x += sx # -1 if dx < 0, 0 if dx = 0, 1 if dx > 0
else: # dy >= dx
y += sy # -1 if dy < 0, 0 if dy = 0, 1 if dy > 0
st += 1 # stepping
e += tg
elif e >= w:
x += sx
y += sy
e -= w
stairs.append(st)
st = 0
if st:
stairs.append(st)
return stairs
def draw_line_vu(canvas, ps, pf, fill):
x1 = ps[0]
x2 = pf[0]
y1 = ps[1]
y2 = pf[1]
I = 100
stairs = []
fills = get_rgb_intensity(canvas, fill, "white", I)
if x1 == x2 and y1 == y2:
canvas.create_line(x1, y1, x1 + 1, y1 + 1, fill=fills[100])
steep = abs(y2 - y1) > abs(x2 - x1)
if steep:
x1, y1 = y1, x1
x2, y2 = y2, x2
if x1 > x2:
x1, x2 = x2, x1
y1, y2 = y2, y1
dx = x2 - x1
dy = y2 - y1
if dx == 0:
tg = 1
else:
tg = dy / dx
# first endpoint
xend = round(x1)
yend = y1 + tg * (xend - x1)
xpx1 = xend
y = yend + tg
# second endpoint
xend = int(x2 + 0.5)
xpx2 = xend
st = 0
# main loop
if steep:
for x in range(xpx1, xpx2):
canvas.create_line(int(y),
x + 1,
int(y) + 1,
x + 2,
fill=fills[int(
(I - 1) * (abs(1 - y + int(y))))])
canvas.create_line(int(y) + 1,
x + 1,
int(y) + 2,
x + 2,
fill=fills[int((I - 1) * (abs(y - int(y))))])
if (abs(int(x) - int(x + 1)) >= 1 and tg > 1) or \
(not 1 > abs(int(y) - int(y + tg)) >= tg):
stairs.append(st)
st = 0
else:
st += 1
y += tg
else:
for x in range(xpx1, xpx2):
#print((I - 1)*round(abs(1 - y + floor(y))))
canvas.create_line(x + 1,
int(y),
x + 2,
int(y) + 1,
fill=fills[round(
(I - 1) * (abs(1 - y + floor(y))))])
#print((I - 1)*round(abs(y - floor(y))))
canvas.create_line(x + 1,
int(y) + 1,
x + 2,
int(y) + 2,
fill=fills[round(
(I - 1) * (abs(y - floor(y))))])
if (abs(int(x) - int(x + 1)) >= 1 and tg > 1) or \
(not 1 > abs(int(y) - int(y + tg)) >= tg):
stairs.append(st)
st = 0
else:
st += 1
y += tg
return stairs