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| from __future__ import division
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| import FreeCAD, Part
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| from FreeCAD import Base
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| class MySpring:
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| def __init__(self, obj):
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| """Add the properties: Pitch, Diameter, Height, BarDiameter"""
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| obj.addProperty(
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| "App::PropertyLength", "Pitch", "MySpring", "Pitch of the helix", locked=True
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| ).Pitch = 5.0
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| obj.addProperty(
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| "App::PropertyLength", "Diameter", "MySpring", "Diameter of the helix", locked=True
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| ).Diameter = 6.0
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| obj.addProperty(
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| "App::PropertyLength", "Height", "MySpring", "Height of the helix", locked=True
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| ).Height = 30.0
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| obj.addProperty(
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| "App::PropertyLength", "BarDiameter", "MySpring", "Diameter of the bar", locked=True
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| ).BarDiameter = 3.0
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| obj.Proxy = self
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| def onChanged(self, fp, prop):
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| if prop == "Pitch" or prop == "Diameter" or prop == "Height" or prop == "BarDiameter":
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| self.execute(fp)
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| def execute(self, fp):
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| pitch = fp.Pitch
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| radius = fp.Diameter / 2
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| height = fp.Height
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| barradius = fp.BarDiameter / 2
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| myhelix = Part.makeHelix(pitch, height, radius)
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| g = myhelix.Edges[0].Curve
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| c = Part.Circle()
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| c.Center = g.value(0)
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| c.Axis = (0, 1, 0)
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| c.Radius = barradius
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| p = c.toShape()
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| section = Part.Wire([p])
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| makeSolid = True
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| isFrenet = True
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| myspring = Part.Wire(myhelix).makePipeShell([section], makeSolid, isFrenet)
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| fp.Shape = myspring
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| def makeMySpring():
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| doc = FreeCAD.activeDocument()
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| if doc is None:
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| doc = FreeCAD.newDocument()
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| spring = doc.addObject("Part::FeaturePython", "My_Spring")
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| spring.Label = "My Spring"
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| MySpring(spring)
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| spring.ViewObject.Proxy = 0
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| doc.recompute()
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| if __name__ == "__main__":
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| makeMySpring()
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|
