Cura/slice/cura_sf/fabmetheus_utilities/geometry/creation/shaft.py

   1 """
   2 Shaft path.
   3
   4 """
   5
   6 from __future__ import absolute_import
   7
   8 from fabmetheus_utilities.geometry.creation import lineation
   9 from fabmetheus_utilities.geometry.geometry_tools import path
  10 from fabmetheus_utilities.geometry.geometry_utilities import evaluate
  11 from fabmetheus_utilities import euclidean
  12 import math
  13
  14
  15 __author__ = 'Enrique Perez (perez_enrique@yahoo.com)'
  16 __credits__ = 'Art of Illusion <http://www.artofillusion.org/>'
  17 __date__ = '$Date: 2008/02/05 $'
  18 __license__ = 'GNU Affero General Public License http://www.gnu.org/licenses/agpl.html'
  19
  20
  21 def getGeometryOutput(derivation, elementNode):
  22         "Get vector3 vertexes from attribute dictionary."
  23         if derivation == None:
  24                 derivation = ShaftDerivation(elementNode)
  25         shaftPath = getShaftPath(derivation.depthBottom, derivation.depthTop, derivation.radius, derivation.sides)
  26         return lineation.getGeometryOutputByLoop(elementNode, lineation.SideLoop(shaftPath))
  27
  28 def getGeometryOutputByArguments(arguments, elementNode):
  29         "Get vector3 vertexes from attribute dictionary by arguments."
  30         evaluate.setAttributesByArguments(['radius', 'sides'], arguments, elementNode)
  31         return getGeometryOutput(None, elementNode)
  32
  33 def getNewDerivation(elementNode):
  34         'Get new derivation.'
  35         return ShaftDerivation(elementNode)
  36
  37 def getShaftPath(depthBottom, depthTop, radius, sides):
  38         'Get shaft with the option of a flat on the top and/or bottom.'
  39         if radius <= 0.0:
  40                 return []
  41         sideAngle = 2.0 * math.pi / float(abs(sides))
  42         startAngle = 0.5 * sideAngle
  43         endAngle = math.pi - 0.1 * sideAngle
  44         shaftProfile = []
  45         while startAngle < endAngle:
  46                 unitPolar = euclidean.getWiddershinsUnitPolar(startAngle)
  47                 shaftProfile.append(unitPolar * radius)
  48                 startAngle += sideAngle
  49         if abs(sides) % 2 == 1:
  50                 shaftProfile.append(complex(-radius, 0.0))
  51         horizontalBegin = radius - depthTop
  52         horizontalEnd = depthBottom - radius
  53         shaftProfile = euclidean.getHorizontallyBoundedPath(horizontalBegin, horizontalEnd, shaftProfile)
  54         for shaftPointIndex, shaftPoint in enumerate(shaftProfile):
  55                 shaftProfile[shaftPointIndex] = complex(shaftPoint.imag, shaftPoint.real)
  56         shaftPath = euclidean.getVector3Path(euclidean.getMirrorPath(shaftProfile))
  57         if sides > 0:
  58                 shaftPath.reverse()
  59         return shaftPath
  60
  61 def processElementNode(elementNode):
  62         "Process the xml element."
  63         path.convertElementNode(elementNode, getGeometryOutput(None, elementNode))
  64
  65
  66 class ShaftDerivation(object):
  67         "Class to hold shaft variables."
  68         def __init__(self, elementNode):
  69                 'Set defaults.'
  70                 self.depthBottomOverRadius = evaluate.getEvaluatedFloat(0.0, elementNode, 'depthBottomOverRadius')
  71                 self.depthTopOverRadius = evaluate.getEvaluatedFloat(0.0, elementNode, 'depthOverRadius')
  72                 self.depthTopOverRadius = evaluate.getEvaluatedFloat(
  73                         self.depthTopOverRadius, elementNode, 'depthTopOverRadius')
  74                 self.radius = evaluate.getEvaluatedFloat(1.0, elementNode, 'radius')
  75                 self.sides = evaluate.getEvaluatedInt(4, elementNode, 'sides')
  76                 self.depthBottom = self.radius * self.depthBottomOverRadius
  77                 self.depthBottom = evaluate.getEvaluatedFloat(self.depthBottom, elementNode, 'depthBottom')
  78                 self.depthTop = self.radius * self.depthTopOverRadius
  79                 self.depthTop = evaluate.getEvaluatedFloat(self.depthTop, elementNode, 'depth')
  80                 self.depthTop = evaluate.getEvaluatedFloat(self.depthTop, elementNode, 'depthTop')