71 lines
2.7 KiB
Python
71 lines
2.7 KiB
Python
"""
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Add material to support overhang or remove material at the overhang angle.
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"""
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from __future__ import absolute_import
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#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.
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import __init__
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from fabmetheus_utilities.geometry.creation import lineation
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from fabmetheus_utilities.geometry.geometry_utilities import evaluate
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from fabmetheus_utilities.vector3 import Vector3
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from fabmetheus_utilities import euclidean
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__author__ = 'Enrique Perez (perez_enrique@yahoo.com)'
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__credits__ = 'Art of Illusion <http://www.artofillusion.org/>'
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__date__ = '$Date: 2008/02/05 $'
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__license__ = 'GNU Affero General Public License http://www.gnu.org/licenses/agpl.html'
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globalExecutionOrder = 20
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def getBevelPath( begin, center, close, end, radius ):
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"Get bevel path."
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beginComplex = begin.dropAxis()
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centerComplex = center.dropAxis()
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endComplex = end.dropAxis()
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beginComplexSegmentLength = abs( centerComplex - beginComplex )
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endComplexSegmentLength = abs( centerComplex - endComplex )
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minimumRadius = lineation.getMinimumRadius( beginComplexSegmentLength, endComplexSegmentLength, radius )
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if minimumRadius <= close:
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return [ center ]
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beginBevel = center + minimumRadius / beginComplexSegmentLength * ( begin - center )
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endBevel = center + minimumRadius / endComplexSegmentLength * ( end - center )
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if radius > 0.0:
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return [ beginBevel, endBevel ]
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midpointComplex = 0.5 * ( beginBevel.dropAxis() + endBevel.dropAxis() )
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spikeComplex = centerComplex + centerComplex - midpointComplex
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return [ beginBevel, Vector3( spikeComplex.real, spikeComplex.imag, center.z ), endBevel ]
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def getManipulatedPaths(close, elementNode, loop, prefix, sideLength):
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"Get bevel loop."
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if len(loop) < 3:
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return [loop]
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derivation = BevelDerivation(elementNode, prefix, sideLength)
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if derivation.radius == 0.0:
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return loop
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bevelLoop = []
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for pointIndex in xrange(len(loop)):
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begin = loop[(pointIndex + len(loop) - 1) % len(loop)]
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center = loop[pointIndex]
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end = loop[(pointIndex + 1) % len(loop)]
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bevelLoop += getBevelPath(begin, center, close, end, derivation.radius)
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return [euclidean.getLoopWithoutCloseSequentialPoints(close, bevelLoop)]
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def getNewDerivation(elementNode, prefix, sideLength):
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'Get new derivation.'
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return BevelDerivation(elementNode, prefix, sideLength)
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def processElementNode(elementNode):
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"Process the xml element."
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lineation.processElementNodeByFunction(elementNode, getManipulatedPaths)
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class BevelDerivation:
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"Class to hold bevel variables."
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def __init__(self, elementNode, prefix, sideLength):
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'Set defaults.'
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self.radius = lineation.getFloatByPrefixSide(0.0, elementNode, prefix + 'radius', sideLength)
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