I tried using the scripts but something gets messed up.
When I extract the face and try to create a surface out of it the trim information is not passed on to the resulting surface.
This is what I do:
# get_brep_face.py
# created by Helvetosaur Mar 2014
# modified and adapted by zooid Mar 2019
import Rhino
import rhinoscriptsyntax as rs
import scriptcontext as sc
def GetOnlyBrepFace():
msg="Select a surface or Brep face to offset"
go = Rhino.Input.Custom.GetObject()
go.SetCommandPrompt(msg)
go.GeometryFilter = Rhino.DocObjects.ObjectType.Surface
go.GeometryAttributeFilter=Rhino.Input.Custom.GeometryAttributeFilter.SubSurface
go.SubObjectSelect = True
go.AcceptNothing(False)
if go.Get()!=Rhino.Input.GetResult.Object: return
objref = go.Object(0)
objrefsurf = objref.Surface()
print objrefsurf
if objrefsurf is not None:
tmp_surf = sc.doc.Objects.AddSurface(objrefsurf)
rs.UnrollSurface(surface_id=tmp_surf,explode=False,following_geometry=None,absolute_tolerance=None,relative_tolerance=None)
rs.DeleteObject(tmp_surf)
else:
return
#etc
GetOnlyBrepFace()
I see now there is a class BrepTrim,
I can extract the so called BrepTrim from the Brep.
But in Rhino.Geometry.Brep.Trim() I need an interval. How can I use the information from BrepTrim in order to trim a surface created from a sub-surface of a brep?
import Rhino
import rhinoscriptsyntax as rs
import scriptcontext as sc
def SubObjectSelect():
obj_ref = rs.GetObject(message="Bla", filter=rs.filter.curve, preselect=False, subobjects=True)
if obj_ref:
#print "Surface:", obj_ref.Surface()
print "Selection Point:", obj_ref.SelectionPoint()
objrefsurf = obj_ref.Surface()
#border = rs.DuplicateEdgeCurves(obj_ref)
trim = obj_ref.Trim()
Hi @ivelin.peychev,
Surfaces can’t store trimming information, that’s what breps are for. So instead of converting to a surface in your “get”, if you want to keep the trims convert to brep instead und unroll that brep
Good idea @lando.schumpich, but doesn’t really work properly. See my breps are Polysurfaces. Imagine a plate and thickness. If I use brep obj_ref.Brep() then in the unroll command each sub-part of this brep is passed. As a result I don’t just get one object unrolled but all of them. Which is not what I need.
I tried using also obj_ref.Face() to get the face out of the brep. But when adding the object to the doc with sc.doc.Objects.AddBrep(the_face) it throws an error that it’s a Face and not a Brep. If I try to add it as a surface I again get the untrimmed one.
# select_subobjects.py
# created by clement Mar 2014
# modified and adapted by zooid Mar 2019
import Rhino
import rhinoscriptsyntax as rs
import scriptcontext as sc
def SubObjectSelect():
obj_ref = rs.GetObject(message="Bla", filter=rs.filter.surface, preselect=False, subobjects=True)
if obj_ref:
#print "Surface:", obj_ref.Surface()
print "Selection Point:", obj_ref.SelectionPoint()
#objrefsurf = obj_ref.Surface()
#objrefbrep = obj_ref.Brep()
objrefbrep = obj_ref.Face()
#trim = obj_ref.Trim()
#print trim
#trim_obj = sc.doc.Objects.AddSurface(trim)
if objrefbrep is not None:
#tmp_surf = sc.doc.Objects.AddSurface(objrefsurf)
tmp_brep = sc.doc.Objects.AddBrep(objrefbrep)
rs.UnrollSurface(surface_id=tmp_brep,explode=False,following_geometry=None,absolute_tolerance=None,relative_tolerance=None)
rs.DeleteObject(tmp_brep)
else:
return
if __name__=="__main__":
SubObjectSelect()
Perhaps Unroll isn’t what I need at all since it requires a surface not a Brep (polysurface). But I still don’t know how to Squish using RhinoCommon
And on top of all scripting the Squish command is a pain.
import Rhino
import scriptcontext as sc
def subSurfaceSelectUnroll():
# set up getter
go = Rhino.Input.Custom.GetObject()
go.SetCommandPrompt("Sub select a brep face")
go.GeometryFilter = Rhino.DocObjects.ObjectType.Surface
# get
go.Get()
# test if success
if go.CommandResult() != Rhino.Commands.Result.Success:
return go.CommandResult()
# get geometry (is brepface)
brepFace = go.Object(0).Geometry()
# get parent
brepParent = brepFace.Brep
# extract face from brepParent faces list (preserves trims)
brepTrimmed = brepParent.Faces.ExtractFace(brepFace.FaceIndex)
# create instance of unroller class, with trimmed face as input
unroller = Rhino.Geometry.Unroller(brepTrimmed)
# unroll
arrBrepUnrolled, arrCurveUnrolled, arrPointUnrolled, arrTextDotUnrolled = unroller.PerformUnroll()
# add to doc
for brep in arrBrepUnrolled:
sc.doc.Objects.AddBrep(brep)
if __name__ == "__main__":
subSurfaceSelectUnroll()
