Cura/slice/cura_sf/fabmetheus_utilities/geometry/geometry_tools/path_elements/quadratic.py

   1 """
   2 Quadratic vertexes.
   3
   4 From:
   5 http://www.w3.org/TR/SVG/paths.html#PathDataQuadraticBezierCommands
   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 getQuadraticPath(elementNode):
  24         "Get the quadratic path."
  25         end = evaluate.getVector3FromElementNode(elementNode)
  26         previousElementNode = elementNode.getPreviousElementNode()
  27         if previousElementNode == None:
  28                 print('Warning, can not get previousElementNode in getQuadraticPath in quadratic for:')
  29                 print(elementNode)
  30                 return [end]
  31         begin = elementNode.getPreviousVertex(Vector3())
  32         controlPoint = evaluate.getVector3ByPrefix(None, elementNode, 'controlPoint')
  33         if controlPoint == None:
  34                 oldControlPoint = evaluate.getVector3ByPrefixes(previousElementNode, ['controlPoint','controlPoint1'], None)
  35                 if oldControlPoint == None:
  36                         oldControlPoint = end
  37                 controlPoint = begin + begin - oldControlPoint
  38                 evaluate.addVector3ToElementNode(elementNode, 'controlPoint', controlPoint)
  39         return svg_reader.getQuadraticPoints(begin, controlPoint, end, lineation.getNumberOfBezierPoints(begin, elementNode, end))
  40
  41 def processElementNode(elementNode):
  42         "Process the xml element."
  43         elementNode.parentNode.xmlObject.vertexes += getQuadraticPath(elementNode)