"""
======
Shapes
======

This example shows how to draw several different shapes:

* line
* Bezier curve
* polygon
* circle
* ellipse

"""
import numpy as np
import matplotlib.pyplot as plt

from skimage.draw import (line, polygon, circle,
                          circle_perimeter,
                          ellipse, ellipse_perimeter,
                          bezier_curve)
import math

img = np.zeros((500, 500, 3), dtype=np.uint8)

# draw line
rr, cc = line(120, 123, 20, 400)
img[rr, cc, 0] = 255

# fill polygon
poly = np.array((
    (300, 300),
    (480, 320),
    (380, 430),
    (220, 590),
    (300, 300),
))
rr, cc = polygon(poly[:, 0], poly[:, 1], img.shape)
img[rr, cc, 1] = 255

# fill circle
rr, cc = circle(200, 200, 100, img.shape)
img[rr, cc, :] = (255, 255, 0)

# fill ellipse
rr, cc = ellipse(300, 300, 100, 200, img.shape)
img[rr, cc, 2] = 255

# circle
rr, cc = circle_perimeter(120, 400, 15)
img[rr, cc, :] = (255, 0, 0)

# Bezier curve
rr, cc = bezier_curve(70, 100, 10, 10, 150, 100, 1)
img[rr, cc, :] = (255, 0, 0)

# ellipses
rr, cc = ellipse_perimeter(120, 400, 60, 20, orientation=math.pi / 4.)
img[rr, cc, :] = (255, 0, 255)
rr, cc = ellipse_perimeter(120, 400, 60, 20, orientation=-math.pi / 4.)
img[rr, cc, :] = (0, 0, 255)
rr, cc = ellipse_perimeter(120, 400, 60, 20, orientation=math.pi / 2.)
img[rr, cc, :] = (255, 255, 255)

plt.imshow(img)
plt.show()

"""

Anti-aliased drawing for:
* line
* circle

"""

import numpy as np
import matplotlib.pyplot as plt

from skimage.draw import (line_aa,
                          circle_perimeter_aa)

img = np.zeros((100, 100), dtype=np.uint8)

# anti-aliased line
rr, cc, val = line_aa(12, 12, 20, 50)
img[rr, cc] = val * 255

# anti-aliased circle
rr, cc, val = circle_perimeter_aa(60, 40, 30)
img[rr, cc] = val * 255


plt.imshow(img, cmap=plt.cm.gray, interpolation='nearest')
plt.title('Anti-aliasing')
plt.show()