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from math import sin, cos, pi
from . import braid
from .braid import angle_point
import bpy
def poly_line(curve, points, join=True, type='NURBS'):
polyline = curve.splines.new(type)
polyline.points.add(len(points) - 1)
for num in range(len(points)):
polyline.points[num].co = (points[num]) + (1,)
polyline.order_u = len(polyline.points) - 1
if join:
polyline.use_cyclic_u = True
def poly_lines(objname, curvename, lines, bevel=None, joins=False, ctype='NURBS'):
curve = bpy.data.curves.new(name=curvename, type='CURVE')
curve.dimensions = '3D'
obj = bpy.data.objects.new(objname, curve)
obj.location = (0, 0, 0) # object origin
# ctx.scene.objects.link(obj)
for i, line in enumerate(lines):
poly_line(curve, line, joins if type(joins) == bool else joins[i], type=ctype)
if bevel:
curve.bevel_object = bpy.data.objects[bevel]
return obj
def nurbs_circle(name, w, h):
pts = [(-w / 2, 0, 0), (0, -h / 2, 0), (w / 2, 0, 0), (0, h / 2, 0)]
return poly_lines(name, name + '_curve', [pts], joins=True)
def star_pts(r=1, ir=None, points=5, center=(0, 0)):
'''Create points for a star. They are 2d - z is always zero
r: the outer radius
ir: the inner radius
'''
if not ir:
ir = r / 5
pts = []
dt = pi * 2 / points
for i in range(points):
t = i * dt
ti = (i + .5) * dt
pts.append(angle_point(center, t, r) + (0,))
pts.append(angle_point(center, ti, ir) + (0,))
return pts
def clear():
for obj in bpy.data.objects:
if obj.type not in ('CAMERA', 'LAMP'):
obj.select = True
else:
obj.select = False
bpy.ops.object.delete()
def defaultCircle(w=.6):
circle = nurbs_circle('braid_circle', w, w)
circle.hide = True
return circle
def defaultStar():
star = poly_lines('star', 'staz', [tuple(star_pts(points=5, r=.5, ir=.05))], type='NURBS')
star.hide = True
return star
def awesome_braid(strands=3, sides=5, bevel='braid_circle', pointy=False, **kwds):
lines = braid.strands(strands, sides, **kwds)
type = {True: 'POLY', False: 'NURBS'}[pointy]
return poly_lines('Braid', 'Braid_c', lines, bevel=bevel, joins=True, ctype=type)
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