app.py 文件源码

def draw_line(draw, pos, line_width, dir="h", color=(0, 0, 0), line_weight_factor=1):
    # Draw a fuzzy line of randomish width repeat times
    repeat = random.randint(10, 20)
    width = int(line_width) * line_weight_factor
    default_padding = line_width / 3

    margin_extent = 20 # random.randint(1, 20)
    # Slide the center of the line down width/2 based on dir
    if dir == 'h':
        pos[1] += width / 2
        pos[3] += width / 2
        # Introduce some randomness into the margins
        pos[0] -= random.triangular(width / margin_extent, width * margin_extent)
        pos[2] += random.triangular(width / margin_extent, width * margin_extent)
    else:
        pos[0] -= width / 2
        pos[2] -= width / 2
        # Introduce some randomness into the margins
        pos[1] -= random.triangular(width / margin_extent, width * margin_extent)
        pos[3] += random.triangular(width / margin_extent, width * margin_extent)

    for i in range(0, repeat):

        width = int(random.uniform(line_width - default_padding, line_width))
        padding = default_padding * 4

        pos[0] = random.triangular(pos[0] - padding, pos[0] + padding)
        pos[1] = random.triangular(pos[1] - padding, pos[1] + padding)
        pos[2] = random.triangular(pos[2] - padding, pos[2] + padding)
        pos[3] = random.triangular(pos[3] - padding, pos[3] + padding)

        opacity = 240 + i
        width_factor = random.triangular(1, 10, 1)
        draw.line(pos, width=int(width / width_factor), fill=(*color, opacity))