def int_test(ps, pf):
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
pr = 1
else:
pr = 0
m = 2 * dy
e = m - dx
ed = 2 * dx
x = ps[0]
y = ps[1]
while x != pf[0] or y != pf[1]:
if e >= 0:
if pr == 1:
x += sx
else:
y += sy
e -= ed
if e <= 0:
if pr == 0:
x += sx
else:
y += sy
e += m
def smoth_test(ps, pf):
L = 100
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
pr = 1
else:
pr = 0
m = dy / dx * L
e = L / 2
w = L - m
x = ps[0]
y = ps[1]
while x != pf[0] or y != pf[1]:
if e < w:
if pr == 0:
x += sx
else:
y += sy
e += m
elif e >= w:
x += sx
y += sy
e -= w
def float_test(ps, pf):
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
pr = 1
else:
pr = 0
m = dy / dx
e = m - 1 / 2
x = ps[0]
y = ps[1]
while x != pf[0] or y != pf[1]:
if e >= 0:
if pr == 1:
x += sx
else:
y += sy
e -= 1
if e <= 0:
if pr == 0:
x += sx
else:
y += sy
e += m
def draw_line_brez_float(canvas, ps, pf, fill):
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 # шагаем по y
else:
steep = 0
tg = dy / dx # tангенс угла наклона
e = tg - 1 / 2 # начальное значение ошибки
x = ps[0] # начальный икс
y = ps[1] # начальный игрек
stairs = []
st = 1
while x != pf[0] or y != pf[1]:
canvas.create_line(x, y, x + 1, y + 1, fill=fill)
# выбираем пиксель
if e >= 0:
if steep == 1: # dy >= dx
x += sx
else: # dy < dx
y += sy
e -= 1 # отличие от целого
stairs.append(st)
st = 0
if e <= 0:
if steep == 0: # dy < dx
x += sx
else: # dy >= dx
y += sy
st += 1
e += tg # отличие от целого
if st:
stairs.append(st)
return stairs
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_brez_int(canvas, ps, pf, fill):
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
e = 2 * dy - dx # отличие от вещественного (e = tg - 1 / 2) tg = dy / dx
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)
if e >= 0:
if steep == 1:
x += sx
else:
y += sy
stairs.append(st)
st = 0
e -= 2 * dx # отличие от вещественного (e -= 1)
if e <= 0:
if steep == 0:
x += sx
else:
y += sy
st += 1
e += 2 * dy # difference (e += tg)
if st:
stairs.append(st)
return stairs
