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Added a function to calculate cut volumes to ArchCommads

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This commit is contained in:
Yorik van Havre 2012-04-05 15:11:47 -03:00
parent ab7c176f42
commit 5ff29e2b5c
1 changed files with 44 additions and 0 deletions
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src/Mod/Arch/ArchCommands.py
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@ -199,6 +199,50 @@ def makeFace(wires,method=2,cleanup=False):
print "final face:",mf.Faces
return mf.Faces[0]
def getCutVolume(objects,placement):
'''getCutVolume(objects,placement): returns a tuple with 2 objects: a face, positioned
at the given placement's position, and wide enough so the projection of all objects
in the list fits into it, and an extrusion vector, that can be used to extrude the
plane so it includes all objects in the list.'''
import Part
if not objects:
return None
bb = objects[0].Shape.BoundBox
for obj in objects[1:]:
bb.add(obj.Shape.BoundBox)
bb.enlarge(1)
u = placement.Rotation.multVec(FreeCAD.Vector(1,0,0))
v = placement.Rotation.multVec(FreeCAD.Vector(0,1,0))
w = placement.Rotation.multVec(FreeCAD.Vector(0,0,1))
um = vm = wm = 0
if not bb.isCutPlane(placement.Base,w):
return None
corners = [FreeCAD.Vector(bb.XMin,bb.YMin,bb.ZMin),
FreeCAD.Vector(bb.XMin,bb.YMax,bb.ZMin),
FreeCAD.Vector(bb.XMax,bb.YMin,bb.ZMin),
FreeCAD.Vector(bb.XMax,bb.YMax,bb.ZMin),
FreeCAD.Vector(bb.XMin,bb.YMin,bb.ZMax),
FreeCAD.Vector(bb.XMin,bb.YMax,bb.ZMax),
FreeCAD.Vector(bb.XMax,bb.YMin,bb.ZMax),
FreeCAD.Vector(bb.XMax,bb.YMax,bb.ZMax)]
for c in corners:
dv = c.sub(placement.Base)
um1 = fcvec.project(dv,u).Length
um = max(um,um1)
vm1 = fcvec.project(dv,v).Length
vm = max(vm,vm1)
wm1 = fcvec.project(dv,w).Length
wm = max(wm,wm1)
p1 = FreeCAD.Vector(-um,vm,0)
p2 = FreeCAD.Vector(um,vm,0)
p3 = FreeCAD.Vector(um,-vm,0)
p4 = FreeCAD.Vector(-um,-vm,0)
f = Part.makePolygon([p1,p2,p3,p4,p1])
f = Part.Face(f)
f.Placement = placement
n = fcvec.scaleTo(w,wm)
return (f,n)
def meshToShape(obj,mark=True):
'''meshToShape(object,[mark]): turns a mesh into a shape, joining coplanar facets. If
mark is True (default), non-solid objects will be marked in red'''