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Draft: move functions to draftgeoutils.cuboids
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| # *************************************************************************** | ||
| # * Copyright (c) 2009, 2010 Yorik van Havre <yorik@uncreated.net> * | ||
| # * Copyright (c) 2009, 2010 Ken Cline <cline@frii.com> * | ||
| # * * | ||
| # * This file is part of the FreeCAD CAx development system. * | ||
| # * * | ||
| # * This program is free software; you can redistribute it and/or modify * | ||
| # * it under the terms of the GNU Lesser General Public License (LGPL) * | ||
| # * as published by the Free Software Foundation; either version 2 of * | ||
| # * the License, or (at your option) any later version. * | ||
| # * for detail see the LICENCE text file. * | ||
| # * * | ||
| # * FreeCAD is distributed in the hope that it will be useful, * | ||
| # * but WITHOUT ANY WARRANTY; without even the implied warranty of * | ||
| # * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | ||
| # * GNU Library General Public License for more details. * | ||
| # * * | ||
| # * You should have received a copy of the GNU Library General Public * | ||
| # * License along with FreeCAD; if not, write to the Free Software * | ||
| # * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * | ||
| # * USA * | ||
| # * * | ||
| # *************************************************************************** | ||
| """Provides various functions for cubic shapes (parallelepipeds).""" | ||
| ## @package cuboids | ||
| # \ingroup DRAFTGEOUTILS | ||
| # \brief Provides various functions for cubic shapes (parallelepipeds). | ||
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| import math | ||
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| import FreeCAD as App | ||
| import DraftVecUtils | ||
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| from draftgeoutils.general import geomType, vec, precision | ||
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| def isCubic(shape): | ||
| """Return True if the shape is a parallelepiped (cuboid). | ||
| A parallelepiped of cube-like shape has 8 vertices, 6 faces, 12 edges, | ||
| and all angles are 90 degrees between its edges. | ||
| """ | ||
| # first we try fast methods | ||
| if (len(shape.Vertexes) != 8 | ||
| or len(shape.Faces) != 6 | ||
| or len(shape.Edges) != 12): | ||
| return False | ||
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| for e in shape.Edges: | ||
| if geomType(e) != "Line": | ||
| return False | ||
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| # if ok until now, let's do more advanced testing | ||
| for f in shape.Faces: | ||
| if len(f.Edges) != 4: | ||
| return False | ||
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| for i in range(4): | ||
| e1 = vec(f.Edges[i]) | ||
| if i < 3: | ||
| e2 = vec(f.Edges[i+1]) | ||
| else: | ||
| e2 = vec(f.Edges[0]) | ||
| rpi = [0.0, round(math.pi/2, precision())] | ||
| if round(e1.getAngle(e2), precision()) not in rpi: | ||
| return False | ||
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| return True | ||
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| def getCubicDimensions(shape): | ||
| """Return a list containing the placement, and dimensions of the shape. | ||
| The dimensios are length, width and height of a the parallelepiped, | ||
| rounded to the value indicated by `precision`. | ||
| The placement point is the lowest corner of the shape. | ||
| If it is not a parallelepiped (cuboid), return None. | ||
| """ | ||
| if not isCubic(shape): | ||
| return None | ||
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| # determine lowest face, which will be our base | ||
| z = [10, 1000000000000] | ||
| for i in range(len(shape.Faces)): | ||
| if shape.Faces[i].CenterOfMass.z < z[1]: | ||
| z = [i, shape.Faces[i].CenterOfMass.z] | ||
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| if z[0] > 5: | ||
| return None | ||
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| base = shape.Faces[z[0]] | ||
| basepoint = base.Edges[0].Vertexes[0].Point | ||
| plpoint = base.CenterOfMass | ||
| # basenorm = base.normalAt(0.5, 0.5) | ||
|
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| # getting length and width | ||
| vx = vec(base.Edges[0]) | ||
| vy = vec(base.Edges[1]) | ||
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| # getting rotations | ||
| rotZ = DraftVecUtils.angle(vx) | ||
| rotY = DraftVecUtils.angle(vx, App.Vector(vx.x, vx.y, 0)) | ||
| rotX = DraftVecUtils.angle(vy, App.Vector(vy.x, vy.y, 0)) | ||
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| # getting height | ||
| vz = None | ||
| rpi = round(math.pi/2, precision()) | ||
| for i in range(1, 6): | ||
| for e in shape.Faces[i].Edges: | ||
| if basepoint in [e.Vertexes[0].Point, e.Vertexes[1].Point]: | ||
| vtemp = vec(e) | ||
| # print(vtemp) | ||
| if round(vtemp.getAngle(vx), precision()) == rpi: | ||
| if round(vtemp.getAngle(vy), precision()) == rpi: | ||
| vz = vtemp | ||
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| if not vz: | ||
| return None | ||
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| mat = App.Matrix() | ||
| mat.move(plpoint) | ||
| mat.rotateX(rotX) | ||
| mat.rotateY(rotY) | ||
| mat.rotateZ(rotZ) | ||
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| return [App.Placement(mat), | ||
| round(vx.Length, precision()), | ||
| round(vy.Length, precision()), | ||
| round(vz.Length, precision())] |