experimenting with python-graphblas logo

gistfile1.py

# It is nice to experiment in a Jupyter Notebook
import numpy as np
import scipy as sp
import drawsvg as draw

gcube = np.array([
    [-1, 1, -1],
    [-1, 1, 1],
    [1, 1, 1],
    [-1, -1, 1],
    [1, -1, 1],
    [1, 0, 1],
    [0, 0, 1],
])
gcube_major = gcube[:5]  # Big circles
gcube_minor = gcube[5:]  # Small circles
lines = np.array([
    [gcube[1], gcube[0]],
    [gcube[1], gcube[2]],
    [gcube[1], gcube[3]],
    [gcube[3], gcube[4]],
    [gcube[4], gcube[5]],
    [gcube[5], gcube[6]],
])

angles = [
    180,  # Don't modify this
    30,  # How much of the "left face" to see
    22.5,  # How much of the "top face" to see
]
R = sp.spatial.transform.Rotation.from_euler("ZYX", angles, degrees=True).as_matrix()

d = draw.Drawing(200, 200, origin='center')
d.append(draw.Rectangle(-100, -100, 200, 200, stroke="black", fill="white"))  # Add a border to see boundaries (for testing)
# d.append(draw.Rectangle(-100, -100, 200, 200, stroke="black", fill="black"))  # Uncomment to check dark mode

# Similar to, but different than, networkx blue and orange
blue = "#208BB4"
orange = "#F87A2D"

scale = 40
dx = 0
dy = 0

for (x0, y0, z0), (x1, y1, z1) in ((lines @ R)*scale).tolist():
    # white border around lines
    x0 = -x0 ; x1 = -x1  # Just live with this
    d.append(draw.Line(x0 + dx, y0 + dy, x1 + dx, y1 + dy, stroke="white", stroke_width=16))
for (x0, y0, z0), (x1, y1, z1) in ((lines @ R)*scale).tolist():
    x0 = -x0 ; x1 = -x1
    d.append(draw.Line(x0 + dx, y0 + dy, x1 + dx, y1 + dy, stroke=orange, stroke_width=8))
for x, y, z in ((gcube_major @ R)*scale).tolist():
    x = -x
    d.append(draw.Circle(x + dx, y + dy, 16, fill=blue, stroke="white", stroke_width=4))
for x, y, z in ((gcube_minor @ R)*scale).tolist():
    x = -x
    d.append(draw.Circle(x + dx, y + dy, 8, fill=blue, stroke="white", stroke_width=4))
d.append(draw.Text("[", x=-85, y=50, font_size=200, text_anchor="middle", font_family="Courier New", fill="#4d4d4d"))
d.append(draw.Text("]", x=85, y=50, font_size=200, text_anchor="middle", font_family="Courier New", fill="#4d4d4d"))
d.save_svg('python_graphblas_logo0.svg')
d  # To view in a Jupyter Notebook

python_graphblas_logo0.svg