6 from __future__ import absolute_import
8 from fabmetheus_utilities.geometry.creation import extrude
9 from fabmetheus_utilities.geometry.creation import lineation
10 from fabmetheus_utilities.geometry.creation import solid
11 from fabmetheus_utilities.geometry.geometry_utilities import evaluate
12 from fabmetheus_utilities.geometry.solids import cylinder
13 from fabmetheus_utilities.vector3 import Vector3
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'
24 def addPegOutput(bevel, endZ, outputs, radiusArealized, sides, start, topOverBottom):
25 'Add beveled cylinder to outputs given bevel, endZ, radiusArealized and start.'
26 height = abs(start.z - endZ)
27 bevelStartRatio = max(1.0 - bevel / height, 0.5)
28 oneMinusBevelStartRatio = 1.0 - bevelStartRatio
29 trunkEndZ = bevelStartRatio * endZ + oneMinusBevelStartRatio * start.z
30 trunkTopOverBottom = bevelStartRatio * topOverBottom + oneMinusBevelStartRatio
31 cylinder.addCylinderOutputByEndStart(trunkEndZ, radiusArealized, outputs, sides, start, trunkTopOverBottom)
32 capRadius = radiusArealized * trunkTopOverBottom
33 capStart = bevelStartRatio * Vector3(start.x, start.y, endZ) + oneMinusBevelStartRatio * start
34 radiusMaximum = max(radiusArealized.real, radiusArealized.imag)
35 endRadiusMaximum = radiusMaximum * topOverBottom - bevel
36 trunkRadiusMaximum = radiusMaximum * trunkTopOverBottom
37 capTopOverBottom = endRadiusMaximum / trunkRadiusMaximum
38 cylinder.addCylinderOutputByEndStart(endZ, capRadius, outputs, sides, capStart, capTopOverBottom)
40 def getGeometryOutput(derivation, elementNode):
41 'Get vector3 vertexes from attribute dictionary.'
42 if derivation == None:
43 derivation = PegDerivation(elementNode)
45 radiusArealized = complex(derivation.radiusArealized, derivation.radiusArealized)
46 addPegOutput(derivation.bevel, derivation.endZ, positives, radiusArealized, derivation.sides, derivation.start, derivation.topOverBottom)
47 return extrude.getGeometryOutputByNegativesPositives(elementNode, [], positives)
49 def getGeometryOutputByArguments(arguments, elementNode):
50 'Get vector3 vertexes from attribute dictionary by arguments.'
51 evaluate.setAttributesByArguments(['radius', 'endZ', 'start'], arguments, elementNode)
52 return getGeometryOutput(None, elementNode)
54 def getNewDerivation(elementNode):
56 return PegDerivation(elementNode)
58 def getTopAddBiconicOutput(bottomRadians, height, outputs, radius, sides, start, tipRadius, topRadians):
59 'Get top and add biconic cylinder to outputs.'
60 radiusMaximum = max(radius.real, radius.imag)
61 topRadiusMaximum = radiusMaximum - height * math.tan(bottomRadians)
62 trunkEndZ = start.z + height
63 trunkTopOverBottom = topRadiusMaximum / radiusMaximum
64 topRadiusComplex = trunkTopOverBottom * radius
65 cylinder.addCylinderOutputByEndStart(trunkEndZ, radius, outputs, sides, start, trunkTopOverBottom)
66 tipOverTop = tipRadius / topRadiusMaximum
69 capStart = Vector3(start.x, start.y, trunkEndZ)
70 capEndZ = trunkEndZ + (topRadiusMaximum - tipRadius) / math.tan(topRadians)
71 cylinder.addCylinderOutputByEndStart(capEndZ, topRadiusComplex, outputs, sides, capStart, tipOverTop)
74 def processElementNode(elementNode):
75 'Process the xml element.'
76 solid.processElementNodeByGeometry(elementNode, getGeometryOutput(None, elementNode))
78 def setTopOverBottomByRadius(derivation, endZ, radius, startZ):
79 'Set the derivation topOverBottom by the angle of the elementNode, the endZ, float radius and startZ.'
80 angleDegrees = evaluate.getEvaluatedFloat(None, derivation.elementNode, 'angle')
81 if angleDegrees != None:
82 derivation.topOverBottom = cylinder.getTopOverBottom(math.radians(angleDegrees), endZ, complex(radius, radius), startZ)
85 class PegDerivation(object):
86 'Class to hold peg variables.'
87 def __init__(self, elementNode):
89 self.bevelOverRadius = evaluate.getEvaluatedFloat(0.25, elementNode, 'bevelOverRadius')
90 self.clearanceOverRadius = evaluate.getEvaluatedFloat(0.0, elementNode, 'clearanceOverRadius')
91 self.elementNode = elementNode
92 self.endZ = evaluate.getEvaluatedFloat(10.0, elementNode, 'endZ')
93 self.start = evaluate.getVector3ByPrefix(Vector3(), elementNode, 'start')
94 self.radius = lineation.getFloatByPrefixBeginEnd(elementNode, 'radius', 'diameter', 2.0)
95 self.sides = evaluate.getSidesMinimumThreeBasedOnPrecision(elementNode, max(self.radius.real, self.radius.imag))
96 self.radiusArealized = evaluate.getRadiusArealizedBasedOnAreaRadius(elementNode, self.radius, self.sides)
97 self.topOverBottom = evaluate.getEvaluatedFloat(0.8, elementNode, 'topOverBottom')
98 setTopOverBottomByRadius(self, self.endZ, self.radiusArealized, self.start.z)
99 # Set derived variables.
100 self.bevel = evaluate.getEvaluatedFloat(self.bevelOverRadius * self.radiusArealized, elementNode, 'bevel')
101 self.clearance = evaluate.getEvaluatedFloat(self.clearanceOverRadius * self.radiusArealized, elementNode, 'clearance')