081ec9fc65
- Compatible with FreeCAD 0.18 with Python3 - Added 'About' under EM menu - New icon for the FH Solver - Preparing for VoxHenry - Minor fixes in the comments
143 lines
6.0 KiB
Python
143 lines
6.0 KiB
Python
#***************************************************************************
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#* *
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#* Copyright (c) 2018 *
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#* Efficient Power Conversion Corporation, Inc. http://epc-co.com *
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#* *
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#* Developed by FastFieldSolvers S.R.L. under contract by EPC *
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#* http://www.fastfieldsolvers.com *
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#* *
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#* This program is free software; you can redistribute it and/or modify *
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#* it under the terms of the GNU Lesser General Public License (LGPL) *
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#* as published by the Free Software Foundation; either version 2 of *
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#* the License, or (at your option) any later version. *
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#* for detail see the LICENCE text file. *
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#* *
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#* This program is distributed in the hope that it will be useful, *
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#* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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#* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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#* GNU Library General Public License for more details. *
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#* *
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#* You should have received a copy of the GNU Library General Public *
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#* License along with this program; if not, write to the Free Software *
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#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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#* USA *
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#* *
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#***************************************************************************
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__title__="FreeCAD E.M. Workbench global definitions"
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__author__ = "FastFieldSolvers S.R.L."
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__url__ = "http://www.fastfieldsolvers.com"
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from FreeCAD import Vector
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# defines
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#
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# version information
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EM_VERSION = '1.0.1'
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# default node color
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EMFHNODE_DEF_NODECOLOR = (1.0,0.0,0.0)
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# tolerance in degrees when verifying if vectors are parallel
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EMFHSEGMENT_PARTOL = 0.01
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# tolerance in length
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EMFHSEGMENT_LENTOL = 1e-8
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import FreeCAD, Part
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from FreeCAD import Vector
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def getAbsCoordBodyPart(obj,position):
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''' Retrieve the absolute coordinates of a point belonging to an object, even if in a Body or Part
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'obj': object to which the 'position' is relative
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'position': FreeCAD.Vector 3D position relative to objects that contain 'obj'
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(Note: 'position' is NOT relative to the 'obj.Placement', only to the containers)
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return value: FreeCAD.Vector 3D absolute position
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'''
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if obj == None:
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return None
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for parent in obj.InList:
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if parent.TypeId == "PartDesign::Body" or parent.TypeId == "App::Part":
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# make the position absolute
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position = parent.Placement.multVec(position)
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# and recursively check upside
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position = getAbsCoordBodyPart(parent,position)
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break
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return position
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def makeSegShape(n1,n2,width,height,ww):
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''' Compute a segment shape given:
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'n1': start node position (Vector)
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'n2': end node position (Vector)
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'width': segment width
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'height': segment height
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'ww': cross-section direction (along width)
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Returns the created Shape
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'''
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# do not accept coincident nodes
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if (n2-n1).Length < EMFHSEGMENT_LENTOL:
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return None
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# vector along length
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wl = n2-n1;
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# calculate the vector along the height
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wh = (ww.cross(wl))
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# if cross-section is not defined, by default the width vector
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# is assumed to lie in x-y plane perpendicular to the length.
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# If the length direction is parallel to the z-axis, then
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# the width is assumed along the x-axis.
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# The same is done if 'ww' has been defined parallel to 'wl'
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if ww.Length < EMFHSEGMENT_LENTOL or wh.Length < EMFHSEGMENT_LENTOL:
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# if length parallel to the z-axis (note that getAngle() always returns a value
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# between 0 and 180)
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angle = wl.getAngle(Vector(0,0,1))*FreeCAD.Units.Radian
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if angle < EMFHSEGMENT_PARTOL or angle > 180-EMFHSEGMENT_PARTOL:
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ww = Vector(1,0,0)
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else:
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ww = (wl.cross(Vector(0,0,1))).normalize()
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# and re-calculate 'wh' since we changed 'ww'
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wh = (ww.cross(wl))
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# normalize the freshly calculated 'wh'
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wh.normalize()
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# copy ww as the multiply() method changes the vector on which is called
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wwHalf = Vector(ww)
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# must normalize. We don't want to touch 'ww', as this is user's defined
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wwHalf.normalize()
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wwHalf.multiply(width / 2)
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# copy wh as the multiply() method changes the vector on which is called
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whHalf = Vector(wh)
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whHalf.multiply(height / 2)
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# calculate the vertexes
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v11 = n1 - wwHalf - whHalf
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v12 = n1 + wwHalf - whHalf
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v13 = n1 + wwHalf + whHalf
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v14 = n1 - wwHalf + whHalf
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v21 = n2 - wwHalf - whHalf
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v22 = n2 + wwHalf - whHalf
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v23 = n2 + wwHalf + whHalf
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v24 = n2 - wwHalf + whHalf
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# now make faces
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# front
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poly = Part.makePolygon( [v11,v12,v13,v14,v11])
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face1 = Part.Face(poly)
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# back
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poly = Part.makePolygon( [v21,v24,v23,v22,v21])
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face2 = Part.Face(poly)
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# left
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poly = Part.makePolygon( [v11,v14,v24,v21,v11])
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face3 = Part.Face(poly)
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# right
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poly = Part.makePolygon( [v12,v22,v23,v13,v12])
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face4 = Part.Face(poly)
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# top
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poly = Part.makePolygon( [v14,v13,v23,v24,v14])
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face5 = Part.Face(poly)
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# bottom
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poly = Part.makePolygon( [v11,v21,v22,v12,v11])
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face6 = Part.Face(poly)
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# create a shell. Does not need to be solid.
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segShell = Part.makeShell([face1,face2,face3,face4,face5,face6])
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return segShell
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