19. ImageDraw shape

See: https://pillow.readthedocs.io/en/stable/reference/ImageDraw.html#PIL.ImageDraw.ImageDraw.Shape

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19.1. Shape

Use the ImageDraw.shape(shape, fill=None, outline=None) method to draw a shape.

This is experimental.

The shape object is produced via ImageDraw.Outline() and its move, line and curve methods.

fill - Color to use for the fill.

outline - Color to use for the outline.

The code below draws a shape using points generated by the polygon_points function.

The use of ImageDraw.Outline() is undocumented.

Use move to go to the first point (x0, y0).

Use line to draw to the next point (x1, y1).

Use curve to draw a curve between 3 points (x1, y1, x2, y2, x3, y3).

from PIL import Image, ImageDraw
import math

im = Image.new("RGB", (256, 256), "white")
drw = ImageDraw.Draw(im, "RGBA")


def polygon_points(edge_length=30, edges=3, offset=(0, 0)):
    """return polygon points"""
    x, y = offset
    points = []
    angle_step = 360 // edges
    for angle in range(0, 360, angle_step):
        x += math.cos(math.radians(angle)) * edge_length
        y += math.sin(math.radians(angle)) * edge_length
        points.append((x, y))
    points.append(points[0])
    return points


polyg = polygon_points(edge_length=40, edges=18, offset=(100, 20))

s = ImageDraw.Outline()
s.move(polyg[0][0], polyg[0][1])
for i in range(1, len(polyg)-2, 3):
    s.curve(polyg[i][0], polyg[i][1], polyg[i+1][0], polyg[i+1][1], polyg[i+2][0], polyg[i+2][1])
# for i in range(1, len(polyg)):
#     s.line(polyg[i][0], polyg[i][1])

drw.shape(s, outline="blue")
# im.show()
im.save("ImageDraw/ImageDraw_shape.jpg")