Cura/slice/cura_sf/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
  11 from fabmetheus_utilities.geometry.creation import lineation
  12 from fabmetheus_utilities.geometry.geometry_utilities import evaluate
  13 from fabmetheus_utilities.vector3 import Vector3
  14 from fabmetheus_utilities import svg_reader
  15
  16
  17 __author__ = 'Enrique Perez (perez_enrique@yahoo.com)'
  18 __credits__ = 'Art of Illusion <http://www.artofillusion.org/>'
  19 __date__ = '$Date: 2008/02/05 $'
  20 __license__ = 'GNU Affero General Public License http://www.gnu.org/licenses/agpl.html'
  21
  22
  23 def getCubicPath(elementNode):
  24         "Get the cubic path."
  25         end = evaluate.getVector3FromElementNode(elementNode)
  26         previousElementNode = elementNode.getPreviousElementNode()
  27         if previousElementNode == None:
  28                 print('Warning, can not get previousElementNode in getCubicPath in cubic for:')
  29                 print(elementNode)
  30                 return [end]
  31         begin = elementNode.getPreviousVertex(Vector3())
  32         evaluatedControlPoints = evaluate.getTransformedPathByKey([], elementNode, 'controlPoints')
  33         if len(evaluatedControlPoints) > 1:
  34                 return getCubicPathByBeginEnd(begin, evaluatedControlPoints, elementNode, end)
  35         controlPoint0 = evaluate.getVector3ByPrefix(None, elementNode, 'controlPoint0')
  36         controlPoint1 = evaluate.getVector3ByPrefix(None, elementNode, 'controlPoint1')
  37         if len(evaluatedControlPoints) == 1:
  38                 controlPoint1 = evaluatedControlPoints[0]
  39         if controlPoint0 == None:
  40                 oldControlPoint = evaluate.getVector3ByPrefixes(previousElementNode, ['controlPoint','controlPoint1'], None)
  41                 if oldControlPoint == None:
  42                         oldControlPoints = evaluate.getTransformedPathByKey([], previousElementNode, 'controlPoints')
  43                         if len(oldControlPoints) > 0:
  44                                 oldControlPoint = oldControlPoints[-1]
  45                 if oldControlPoint == None:
  46                         oldControlPoint = end
  47                 controlPoint0 = begin + begin - oldControlPoint
  48         return getCubicPathByBeginEnd(begin, [controlPoint0, controlPoint1], elementNode, end)
  49
  50 def getCubicPathByBeginEnd(begin, controlPoints, elementNode, end):
  51         "Get the cubic path by begin and end."
  52         return svg_reader.getCubicPoints(begin, controlPoints, end, lineation.getNumberOfBezierPoints(begin, elementNode, end))
  53
  54 def processElementNode(elementNode):
  55         "Process the xml element."
  56         elementNode.parentNode.xmlObject.vertexes += getCubicPath(elementNode)