Cura/fabmetheus_utilities/geometry/geometry_tools/path_elements/cubic.py

   1 """
   2 Cubic vertexes.
   3
   4 From:
   5 http://www.w3.org/TR/SVG/paths.html#PathDataCubicBezierCommands
   6
   7 """
   8
   9 from __future__ import absolute_import
  10 #Init has to be imported first because it has code to workaround the python bug where relative imports don't work if the module is imported as a main module.
  11 import __init__
  12
  13 from fabmetheus_utilities.geometry.creation import lineation
  14 from fabmetheus_utilities.geometry.geometry_utilities import evaluate
  15 from fabmetheus_utilities.vector3 import Vector3
  16 from fabmetheus_utilities import svg_reader
  17
  18
  19 __author__ = 'Enrique Perez (perez_enrique@yahoo.com)'
  20 __credits__ = 'Art of Illusion <http://www.artofillusion.org/>'
  21 __date__ = '$Date: 2008/02/05 $'
  22 __license__ = 'GNU Affero General Public License http://www.gnu.org/licenses/agpl.html'
  23
  24
  25 def getCubicPath(elementNode):
  26         "Get the cubic path."
  27         end = evaluate.getVector3FromElementNode(elementNode)
  28         previousElementNode = elementNode.getPreviousElementNode()
  29         if previousElementNode == None:
  30                 print('Warning, can not get previousElementNode in getCubicPath in cubic for:')
  31                 print(elementNode)
  32                 return [end]
  33         begin = elementNode.getPreviousVertex(Vector3())
  34         evaluatedControlPoints = evaluate.getTransformedPathByKey([], elementNode, 'controlPoints')
  35         if len(evaluatedControlPoints) > 1:
  36                 return getCubicPathByBeginEnd(begin, evaluatedControlPoints, elementNode, end)
  37         controlPoint0 = evaluate.getVector3ByPrefix(None, elementNode, 'controlPoint0')
  38         controlPoint1 = evaluate.getVector3ByPrefix(None, elementNode, 'controlPoint1')
  39         if len(evaluatedControlPoints) == 1:
  40                 controlPoint1 = evaluatedControlPoints[0]
  41         if controlPoint0 == None:
  42                 oldControlPoint = evaluate.getVector3ByPrefixes(previousElementNode, ['controlPoint','controlPoint1'], None)
  43                 if oldControlPoint == None:
  44                         oldControlPoints = evaluate.getTransformedPathByKey([], previousElementNode, 'controlPoints')
  45                         if len(oldControlPoints) > 0:
  46                                 oldControlPoint = oldControlPoints[-1]
  47                 if oldControlPoint == None:
  48                         oldControlPoint = end
  49                 controlPoint0 = begin + begin - oldControlPoint
  50         return getCubicPathByBeginEnd(begin, [controlPoint0, controlPoint1], elementNode, end)
  51
  52 def getCubicPathByBeginEnd(begin, controlPoints, elementNode, end):
  53         "Get the cubic path by begin and end."
  54         return svg_reader.getCubicPoints(begin, controlPoints, end, lineation.getNumberOfBezierPoints(begin, elementNode, end))
  55
  56 def processElementNode(elementNode):
  57         "Process the xml element."
  58         elementNode.parentNode.xmlObject.vertexes += getCubicPath(elementNode)