3D model 2x4 brick

In this example, we construct a 3D model of a classic 2x4 brick using simple geometric primitives and boolean operations. By combining basic shapes like cylinders and scaled cubes, we replicate the familiar form of the brick, including its hollow underside and studded top. Once the individual brick is modeled, we use simple transformations to generate a colorful pile, showcasing how modular components can be assembled into more complex structures.

from hellotriangle import shapes

# dimensions
l = 31.8
w = 15.8
t = 1.2
h1 = 9.6
h2 = 1.8
d1 = 3.9
diam1 = 4.8
diam2 = 6.5

# create outer shape
brick = shapes.cube().scale([l, w, h1])
cyl = shapes.cylinder(diam1/2.0, 2.0).translate([d1, d1, h1+h2-2.0])

for i in [0.0, d1, 2*d1, 3*d1]:
    for j in [0.0, d1]:
        brick = brick.boolean(cyl.translate([2*i, 2*j, 0.0]), '+')

# add inner cavity
cube = shapes.cube().scale([l-2*t, w-2*t, h1]).translate([t, t,-1.0])
brick = brick.boolean(cube, '-')

# add internal cylinders
cyl1 = shapes.cylinder(diam2/2.0, h1-0.2).translate([l/4.0, w/2.0, 0.0])
cyl2 = shapes.cylinder(diam1/2.0, h1-0.2).translate([l/4.0, w/2.0, -0.2])
cyl3 = cyl1.boolean(cyl2, '-')

for i in [0.0, 8.0, 16.0]:
    brick = brick.boolean(cyl3.translate([i, 0.0, 0.0]), '+')

# position brick
brick = brick.translate([-l/2.0, 0.0, 0.0])

# create pile of bricks
colors = ['#D62246', '#006992', '#2BB786', 'grey']

for i in range(4):
    color = colors[i]
    brick = brick.rotate_Z(90.0).translate([0.0, 0.0, h1])
    draw(brick, color=color)

Figure: Pile of colored bricks (would this be stable?)

Figure: Single 2x4 brick

Figure: Hollow underside