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import cadquery as cq
from scipy.spatial import ConvexHull as sphull
import numpy as np
debug_trace = False
def debugprint(info):
if debug_trace:
print(info)
def box(width, height, depth):
return cq.Workplane("XY").box(width, height, depth)
def cylinder(radius, height, segments=100):
shape = cq.Workplane("XY").union(cq.Solid.makeCylinder(radius=radius, height=height))
shape = translate(shape, (0, 0, -height/2))
return shape
def sphere(radius):
return cq.Workplane('XY').union(cq.Solid.makeSphere(radius))
def cone(r1, r2, height):
return cq.Workplane('XY').union(
cq.Solid.makeCone(radius1=r1, radius2=r2, height=height))
def rotate(shape, angle):
origin = (0, 0, 0)
shape = shape.rotate(axisStartPoint=origin, axisEndPoint=(1, 0, 0), angleDegrees=angle[0])
shape = shape.rotate(axisStartPoint=origin, axisEndPoint=(0, 1, 0), angleDegrees=angle[1])
shape = shape.rotate(axisStartPoint=origin, axisEndPoint=(0, 0, 1), angleDegrees=angle[2])
return shape
def translate(shape, vector):
return shape.translate(tuple(vector))
def mirror(shape, plane=None):
debugprint('mirror()')
return shape.mirror(mirrorPlane=plane)
def union(shapes):
debugprint('union()')
shape = None
for item in shapes:
if shape is None:
shape = item
else:
shape = shape.union(item)
return shape
def add(shapes):
debugprint('union()')
shape = None
for item in shapes:
if shape is None:
shape = item
else:
shape = shape.add(item)
return shape
def difference(shape, shapes):
debugprint('difference()')
for item in shapes:
shape = shape.cut(item)
return shape
def intersect(shape1, shape2):
return shape1.intersect(shape2)
def face_from_points(points):
# debugprint('face_from_points()')
edges = []
num_pnts = len(points)
for i in range(len(points)):
p1 = points[i]
p2 = points[(i + 1) % num_pnts]
edges.append(
cq.Edge.makeLine(
cq.Vector(p1[0], p1[1], p1[2]),
cq.Vector(p2[0], p2[1], p2[2]),
)
)
face = cq.Face.makeFromWires(cq.Wire.assembleEdges(edges))
return face
def hull_from_points(points):
# debugprint('hull_from_points()')
hull_calc = sphull(points)
n_faces = len(hull_calc.simplices)
faces = []
for i in range(n_faces):
face_items = hull_calc.simplices[i]
fpnts = []
for item in face_items:
fpnts.append(points[item])
faces.append(face_from_points(fpnts))
shape = cq.Solid.makeSolid(cq.Shell.makeShell(faces))
shape = cq.Workplane('XY').union(shape)
return shape
def hull_from_shapes(shapes, points=None):
# debugprint('hull_from_shapes()')
vertices = []
for shape in shapes:
verts = shape.vertices()
for vert in verts.objects:
vertices.append(np.array(vert.toTuple()))
if points is not None:
for point in points:
vertices.append(np.array(point))
shape = hull_from_points(vertices)
return shape
def tess_hull(shapes, sl_tol=.5, sl_angTol=1):
# debugprint('hull_from_shapes()')
vertices = []
solids = []
for wp in shapes:
for item in wp.solids().objects:
solids.append(item)
for shape in solids:
verts = shape.tessellate(sl_tol, sl_angTol)[0]
for vert in verts:
vertices.append(np.array(vert.toTuple()))
shape = hull_from_points(vertices)
return shape
def triangle_hulls(shapes):
debugprint('triangle_hulls()')
hulls = [cq.Workplane('XY')]
for i in range(len(shapes) - 2):
hulls.append(hull_from_shapes(shapes[i: (i + 3)]))
return union(hulls)
def polyline(point_list):
return cq.Workplane('XY').polyline(point_list)
# def project_to_plate():
# square = cq.Workplane('XY').rect(1000, 1000)
# for wire in square.wires().objects:
# plane = cq.Workplane('XY').add(cq.Face.makeFromWires(wire))
def extrude_poly(outer_poly, inner_polys=None, height=1): # vector=(0,0,1)):
outer_wires = cq.Wire.assembleEdges(outer_poly.edges().objects)
inner_wires = []
if inner_polys is not None:
for item in inner_polys:
inner_wires.append(cq.Wire.assembleEdges(item.edges().objects))
return cq.Workplane('XY').add(
cq.Solid.extrudeLinear(outerWire=outer_wires, innerWires=inner_wires, vecNormal=cq.Vector(0, 0, height)))
def import_file(fname):
print("IMPORTING FROM {}".format(fname))
return cq.Workplane('XY').add(cq.importers.importShape(
cq.exporters.ExportTypes.STEP,
fname + ".step"))
def export_file(shape, fname):
print("EXPORTING TO {}".format(fname))
cq.exporters.export(w=shape, fname=fname + ".step",
exportType='STEP')
def export_dxf(shape, fname):
print("EXPORTING TO {}".format(fname))
cq.exporters.export(w=shape, fname=fname + ".dxf",
exportType='DXF')
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