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Descrizione

Questa macro consente di selezionare una serie di oggetti contenenti curve di livello e di creare un sito Arch da essi. Le curve di livello possono essere raggruppate in un numero qualsiasi di oggetti e non è necessario che formino polilinee chiuse. La macro si occuperà di tutto. Internamente, verrà creata una B-spline da ogni curva, quindi verranno create superfici rigate tra le curve, in seguito queste superfici rigate verranno unite in un oggetto shell e infine verrà creato un sito Arch utilizzando questa superficie shell come terreno.

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Macro Site From Contours.FCMacro

# This macro builds an Arch Site object out of different level curves.
# It doesn't matter how many object contain the curves or if they
# are connected into wires or not.

import FreeCAD,FreeCADGui,Part,Draft,DraftGeomUtils,Arch

# first build a list of edges from selected objects

edges = []
for obj in FreeCADGui.Selection.getSelection():
    edges.extend(obj.Shape.Edges)

# sort our edges into connected wires

wires = DraftGeomUtils.findWires(edges)

# build a bspline for each wire

bsplines = []
for wire in wires:
    points = []
    for vert in wire.Vertexes:
        points.append(vert.Point)
    bspline = Draft.makeBSpline(points)
    bsplines.append(bspline)

# hide the bsplines

for bspline in bsplines:
    bspline.ViewObject.hide()

# sort the bsplines by elevation (we use the z of their first point to sort)

bsplines.sort(key=lambda b: b.Points[0].z)

# build one ruled surface from each pair of bsplines

ruledsurfaces = []
for i in range(len(bsplines)-1):
    ruled = FreeCAD.ActiveDocument.addObject('Part::RuledSurface', 'TerrainSection')
    ruled.Curve1 = (bsplines[i],[''])
    ruled.Curve2 = (bsplines[i+1],[''])
    ruledsurfaces.append(ruled)

# hide the ruled surfaces

for ruled in ruledsurfaces:
    ruled.ViewObject.hide()

# at this stade we need to recompute to build all the shapes before getting the faces

FreeCAD.ActiveDocument.recompute()

# make a shell object out of all the ruled surfaces

faces = []
for ruled in ruledsurfaces:
    faces.extend(ruled.Shape.Faces)
shell = Part.Shell(faces)
terrain = FreeCAD.ActiveDocument.addObject('Part::Feature', 'Terrain')
terrain.Shape = shell

# make a site object using our shell as terrain

site = Arch.makeSite()
site.Terrain = terrain

# recompute one last time

FreeCAD.ActiveDocument.recompute()

Link

La discussione nel forum Create Toposurface from DXF