76 lines
3.3 KiB
Python
76 lines
3.3 KiB
Python
"""
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Polygon path.
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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_tools import path
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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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import math
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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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def getGeometryOutput(derivation, elementNode):
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"Get vector3 vertexes from attribute dictionary."
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if derivation == None:
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derivation = CircleDerivation(elementNode)
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angleTotal = math.radians(derivation.start)
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loop = []
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sidesCeiling = int(math.ceil(abs(derivation.sides) * derivation.extent / 360.0))
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sideAngle = math.radians(derivation.extent) / sidesCeiling
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if derivation.sides < 0.0:
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sideAngle = -sideAngle
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spiral = lineation.Spiral(derivation.spiral, 0.5 * sideAngle / math.pi)
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for side in xrange(sidesCeiling + 1):
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unitPolar = euclidean.getWiddershinsUnitPolar(angleTotal)
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x = unitPolar.real * derivation.radiusArealized.real
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y = unitPolar.imag * derivation.radiusArealized.imag
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vertex = spiral.getSpiralPoint(unitPolar, Vector3(x, y))
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angleTotal += sideAngle
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loop.append(vertex)
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radiusMaximum = 0.000001 * max(derivation.radiusArealized.real, derivation.radiusArealized.imag)
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loop = euclidean.getLoopWithoutCloseEnds(radiusMaximum, loop)
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lineation.setClosedAttribute(elementNode, derivation.revolutions)
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return lineation.getGeometryOutputByLoop(elementNode, lineation.SideLoop(loop, sideAngle))
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def getGeometryOutputByArguments(arguments, elementNode):
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"Get vector3 vertexes from attribute dictionary by arguments."
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evaluate.setAttributesByArguments(['radius', 'start', 'end', 'revolutions'], arguments, elementNode)
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return getGeometryOutput(None, elementNode)
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def getNewDerivation(elementNode):
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'Get new derivation.'
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return CircleDerivation(elementNode)
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def processElementNode(elementNode):
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"Process the xml element."
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path.convertElementNode(elementNode, getGeometryOutput(None, elementNode))
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class CircleDerivation:
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"Class to hold circle variables."
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def __init__(self, elementNode):
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'Set defaults.'
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self.radius = lineation.getRadiusComplex(elementNode, complex(1.0, 1.0))
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self.sides = evaluate.getEvaluatedFloat(None, elementNode, 'sides')
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if self.sides == None:
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radiusMaximum = max(self.radius.real, self.radius.imag)
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self.sides = evaluate.getSidesMinimumThreeBasedOnPrecisionSides(elementNode, radiusMaximum)
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self.radiusArealized = evaluate.getRadiusArealizedBasedOnAreaRadius(elementNode, self.radius, self.sides)
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self.start = evaluate.getEvaluatedFloat(0.0, elementNode, 'start')
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end = evaluate.getEvaluatedFloat(360.0, elementNode, 'end')
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self.revolutions = evaluate.getEvaluatedFloat(1.0, elementNode, 'revolutions')
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self.extent = evaluate.getEvaluatedFloat(end - self.start, elementNode, 'extent')
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self.extent += 360.0 * (self.revolutions - 1.0)
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self.spiral = evaluate.getVector3ByPrefix(None, elementNode, 'spiral')
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