obelisk_demo.py

import cadquery as cq
import math

# Making an obelisk in cadquery and cq-editor

def pillar(
        points=[(0,0),(0,12.5),(2,12.5) ,(4,4), (4,0)],
        extrude=10,
        faces=4,
        intersect=True
    ):
    log("test_pillar")
    poly = (
        cq.Workplane("XY")
        .polyline(points).close()
        .extrude(extrude)
        .translate((0,0,-1*(extrude/2)))
    )
    
    mirror = (
        cq.Workplane("XY")
        .union(poly)
        .union(poly.rotate((1,0,0),(0,0,0),180))
    )
    
    rotate_degrees = math.floor(360 / faces)
    rotations = int(faces/2)#?
    log(range(rotations))
    
    
    scene = (
        cq.Workplane("XY")
        .union(mirror)
    )
    for i in range(rotations):
        if i == 0:
            scene = scene.union(mirror)
        else:
            if intersect:
                scene = scene.intersect(mirror.rotate((1,0,0),(0,0,0),rotate_degrees*i))
            else:
                scene = scene.union(mirror.rotate((1,0,0),(0,0,0),rotate_degrees*i))
        log('index is'+str(i))
    
    return scene.rotate((0,1,0),(0,0,0),90)
 
    

def obelisk(
        base_width=30, 
        base_height=3,
        inset_width=15,
        inset_height=5,
        mid_width=30,
        mid_height=15,
        top_width=15,
        top_height=70,
        height=102,
        faces=4,
        intersect=True
        ):
    in_height = base_height + inset_height
    mid_height = in_height + mid_height
    t_height = mid_height + top_height
    
    points=[
        (0,0),
        (0,base_width/2),
        (base_height, base_width/2),
        (in_height,inset_width/2),
        (mid_height, mid_width/2),
        (t_height, top_width/2),
        (height,0)
    ]
    
    extrude = base_width
    extrude = inset_width if inset_width > extrude else extrude
    extrude = mid_width if mid_width > extrude else extrude
    extrude = top_width if top_width > extrude else extrude
    
    return (
        pillar(points, extrude, faces, intersect)
        .translate((0,0,-1*(height/2)))
    )

fantasy = obelisk(
    height=105
)

elven = obelisk(
    height=105,
    faces=6,
    intersect=True
)

fantasy_elven = (
    fantasy
    .union(elven)
    .union(elven.rotate((0,0,1),(0,0,0),90))
)

egypt = obelisk(
    base_width=30,
    base_height=5,
    inset_width=25,
    mid_width=25,
    mid_height=5,
    height=105
)

dwarven = obelisk(
    base_width=30,
    base_height=5,
    inset_width=25,
    mid_width=25,
    mid_height=5,
    height=105,
    faces=6,
    intersect=True
)

egypt_dwarven = (
    egypt
    .union(dwarven)
    .union(dwarven.rotate((0,0,1),(0,0,0),90))
)

crystal = obelisk(
    base_width=30,
    base_height=5,
    inset_width=10,
    mid_width=15,
    mid_height=5,
    top_width=40,
    height=105,
    faces=6,
    intersect=True
)

evile = obelisk(
    base_width=40,
    base_height=3,
    inset_width=50,
    mid_width=5,
    mid_height=15,
    top_width=60,
    top_height=40,
    height=105,
    faces=8,
    intersect=False
)

show_object(fantasy)
show_object(elven.translate((-40,0,0)))
show_object(fantasy_elven.translate((-80,0,0)))

show_object(egypt.translate((0,40,0)))
show_object(dwarven.translate((-40,40,0)))
show_object(egypt_dwarven.translate((-80,40,0)))

show_object(crystal.translate((0,80,0)))
show_object(evile.translate((0,145,0)))