The Split node is used to split a shape by another shape or shapes. The result is a compound consisting of the result of the split. To use it either assign the shape1 and shape2 attributes or embed them as child nodes.
A very simple example would be splitting a sphere by plane and "exploding" it.
# Created in DeclaraCAD
from declaracad.occ.api import *
enamldef Assembly(Part):
Axis:
pass
Split: split:
# Split the sphere in half along the x axis
display = False
Sphere:
radius = 3
Plane:
direction = (1, 0, 0)
Transform:
shape = split.topology.solids[0]
operations = [Translate(x=1)]
Transform:
shape = split.topology.solids[1]
operations = [Translate(x=-1)]
A more practical example would be splitting a volume along a split surface to create a two sides of mold as shown below.
# Created in DeclaraCAD
from math import pi
from declaracad.occ.api import *
enamldef SomeWidget(Part):
Hole:
direction = (0, 1, 0)
position = (0, -depth/2, 0)
depth = 20
diameter = 2
near_edge = ("cone", 1)
far_edge = ("chamfer", 1)
enamldef Assembly(Part):
Axis:
pass
Transform:
# Extract only the bottom
color = 'teal'
transparency = 0.5
shape = split.topology.solids[0]
position = (box.dx/2+1, 0, 0)
Split: split:
# The shape we are splitting
Cut: body:
transparency = 0.8
Box: box:
transparency = 0.5
position = (-dx/2, -dy/2, -dz/2)
dx = 20
dy = 30
dz = 6
SomeWidget:
pass
# The face splitting it
Sew: split_face:
Cut:
Transform: top_face:
# Create a copy of the top face and
# move it half way down
shape = box.topology.faces[5]
position = (0, 0, -2)
Face: inner_face:
# Create an offset of the top face and fillet
# the outer edges
Fillet:
radius = 1
Offset:
shape = top_face.topology.wires[0]
offset = -1
# Move the face down
Transform: bottom_face:
shape = inner_face
position = (0, 0, -1)
# Extrude the outside to create a connected surface
Extrude:
vector = (0, 0, -bottom_face.z)
Transform:
shape = bottom_face.topology.wires[0]
Transform:
color = 'purple'
transparency = 0.5
shape = split.topology.solids[1]
operations = [
Rotate(angle=pi, direction=(0, 1, 0)),
Translate(x=box.dx/2+1)
]
