Source code for pi3d.shape.Helix

from __future__ import absolute_import, division, print_function, unicode_literals

import math

from pi3d.Shape import Shape
import logging

LOGGER = logging.getLogger(__name__)

[docs]class Helix(Shape): """ 3d model inherits from Shape""" def __init__(self, camera=None, light=None, radius=1.0, thickness=0.2, ringrots=6, sides=12, rise=1.0, loops=2.0, name="", x=0.0, y=0.0, z=0.0, rx=0.0, ry=0.0, rz=0.0, sx=1.0, sy=1.0, sz=1.0, cx=0.0, cy=0.0, cz=0.0): """uses standard constructor for Shape extra Keyword arguments: *radius* Radius of helix. *thickness* Radius of 'bar' being 'bent' to form the helical shape. *ringrots* Number of sides for the circlular secon of the 'bar'. *sides* Number of sides for Shape._lathe() to use. *rise* Distance between 'threads'. *loops* Number of turns that the helix makes. """ super(Helix, self).__init__(camera, light, name, x, y, z, rx, ry, rz, sx, sy, sz, cx, cy, cz) LOGGER.debug("Creating Helix r{}, t{}, rr{}, s{}".format(radius, thickness, ringrots, sides)) path = [] st = (math.pi * 2) / ringrots hr = rise * 0.5 for r in range(ringrots + 1): path.append((radius + thickness * math.sin(r * st), thickness * math.cos(r * st) - hr)) LOGGER.debug("path: {} {}".format(path[r][0], path[r][1])) self.radius = radius self.thickness = thickness self.ringrots = ringrots self.buf = [self._lathe(path, sides, rise=rise, loops=loops)]