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spb_Silhouette.py
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spb_Silhouette.py
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"""
This script will create draft curves silhouettes as obtained via _DraftAngleAnalysis,
except with curve simplification options and a more convenient execution.
Send any questions, comments, or script development service needs to
@spb on the McNeel Forums, https://discourse.mcneel.com/
"""
from __future__ import absolute_import, division, print_function, unicode_literals
"""
171019-21: Created.
200509: Updated for V7 using newly added Silhouette.ComputeDraftCurve method.
200511,13: Added routine that simplifies curves. Added some options.
200805: Modified pullDirection sign to match change in ComputeDraftCurve in Rhino 7.0.20217.3575, 8/4/2020. Bug fix in printed output.
210223: Added bArcOK. Bug fixes.
210315-17: Modified to check accuracy of output curves against input tolerances. Added bDeg5.
210515: Now by default, will try to rebuild both degrees 3 and 5 within tolerance.
Now, supports sub-selected BrepFaces as input.
220821-22: Refactored main V5&6 from V7 routines into separate functions. Bug fixes.
240106-10: Removed code that only works in V5 & V6. Added more direction options.
Modified simplification routine. Refactored.
Now skips self-intersecting curves.
Pulls curves not on face to the face. The error is not uncommon for ComputeDraftCurve.
Added option and routine to split output curves at G2 discontinuities.
240725: Bug fix in finding G2 discontinuities.
Bug fix in removing knots.
"""
import Rhino
import Rhino.DocObjects as rd
import Rhino.Geometry as rg
import Rhino.Input as ri
import rhinoscriptsyntax as rs
import scriptcontext as sc
import math
class Opts():
keys = []
values = {}
names = {}
riOpts = {}
listValues = {}
stickyKeys = {}
key = 'iPullDir'; keys.append(key)
listValues[key] = (
'CPlanePosX',
'CPlaneNegX',
'CPlanePosY',
'CPlaneNegY',
'CPlanePosZ',
'CPlaneNegZ',
'WorldPosX',
'WorldNegX',
'WorldPosY',
'WorldNegY',
'WorldPosZ',
'WorldNegZ',
'View',
'Custom',
)
values[key] = 4
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'vectCustom'; keys.append(key)
values[key] = sc.doc.Views.ActiveView.ActiveViewport.ConstructionPlane().ZAxis
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'fDraftAngle_Deg'; keys.append(key)
values[key] = 0.0
names[key] = 'DraftAngle'
riOpts[key] = ri.Custom.OptionDouble(values[key])
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bUseDraftComputeFor0'; keys.append(key)
values[key] = False
names[key] = 'ComputeMethod'
riOpts[key] = ri.Custom.OptionToggle(values[key], 'NoDraft', 'Draft')
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'fDistTol'; keys.append(key)
values[key] = 0.5 * sc.doc.ModelAbsoluteTolerance
riOpts[key] = ri.Custom.OptionDouble(values[key])
stickyKeys[key] = '{}({})({})'.format(key, __file__, sc.doc.Name)
key = 'fAngle_Tol_Deg'; keys.append(key)
values[key] = 0.5 * sc.doc.ModelAngleToleranceDegrees
names[key] = 'AngleTol'
riOpts[key] = ri.Custom.OptionDouble(values[key])
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bSimplifyRes'; keys.append(key)
values[key] = True
names[key] = 'AttemptSimplifyResult'
riOpts[key] = ri.Custom.OptionToggle(values[key], 'No', 'Yes')
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bArcOK'; keys.append(key)
values[key] = True
names[key] = 'Arcs'
riOpts[key] = ri.Custom.OptionToggle(values[key], 'No', 'OK')
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bDeg2'; keys.append(key)
values[key] = True
riOpts[key] = ri.Custom.OptionToggle(values[key], 'No', 'Yes')
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bDeg3'; keys.append(key)
values[key] = True
riOpts[key] = ri.Custom.OptionToggle(values[key], 'No', 'Yes')
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bDeg5'; keys.append(key)
values[key] = True
riOpts[key] = ri.Custom.OptionToggle(values[key], 'No', 'Yes')
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bSplitNonG2'; keys.append(key)
values[key] = True
riOpts[key] = ri.Custom.OptionToggle(values[key], 'No', 'Yes')
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bEcho'; keys.append(key)
values[key] = True
riOpts[key] = ri.Custom.OptionToggle(values[key], 'No', 'Yes')
stickyKeys[key] = '{}({})'.format(key, __file__)
key = 'bDebug'; keys.append(key)
values[key] = False
riOpts[key] = ri.Custom.OptionToggle(values[key], 'No', 'Yes')
stickyKeys[key] = '{}({})'.format(key, __file__)
for key in keys:
if key not in names:
names[key] = key[1:]
# Load sticky.
for key in stickyKeys:
if stickyKeys[key] in sc.sticky:
if key in riOpts:
riOpts[key].CurrentValue = values[key] = sc.sticky[stickyKeys[key]]
else:
# For OptionList.
values[key] = sc.sticky[stickyKeys[key]]
@classmethod
def addOption(cls, go, key):
idxOpt = None
if key in cls.riOpts:
if key[0] == 'b':
idxOpt = go.AddOptionToggle(
cls.names[key], cls.riOpts[key])[0]
elif key[0] == 'f':
idxOpt = go.AddOptionDouble(
cls.names[key], cls.riOpts[key])[0]
elif key[0] == 'i':
idxOpt = go.AddOptionInteger(
englishName=cls.names[key], intValue=cls.riOpts[key])[0]
elif key in cls.listValues:
idxOpt = go.AddOptionList(
englishOptionName=cls.names[key],
listValues=cls.listValues[key],
listCurrentIndex=cls.values[key])
else:
print("{} is not a valid key in Opts.".format(key))
return idxOpt
@classmethod
def setValue(cls, key, idxList=None):
if key == 'fDraftAngle_Deg':
cls.values[key] = cls.riOpts[key].CurrentValue
sc.sticky[cls.stickyKeys[key]] = cls.values[key]
return
if key == 'fDistTol':
if cls.riOpts[key].CurrentValue < 1e-6:
cls.riOpts[key].CurrentValue = cls.riOpts[key].InitialValue
cls.values[key] = cls.riOpts[key].CurrentValue
sc.sticky[cls.stickyKeys[key]] = cls.values[key]
return
if key == 'fAngle_Tol_Deg':
if cls.riOpts[key].CurrentValue < 1e-6:
cls.riOpts[key].CurrentValue = cls.riOpts[key].InitialValue
cls.values[key] = cls.riOpts[key].CurrentValue
sc.sticky[cls.stickyKeys[key]] = cls.values[key]
return
if key in cls.riOpts:
cls.values[key] = cls.riOpts[key].CurrentValue
elif key in cls.listValues:
cls.values[key] = idxList
else:
print("Why is key, {}, here? Value was not set or sticky-saved.".format(key))
return
sc.sticky[cls.stickyKeys[key]] = cls.values[key]
@classmethod
def saveSticky(cls):
for key in cls.stickyKeys:
if key in cls.riOpts:
sc.sticky[cls.stickyKeys[key]] = cls.riOpts[key].CurrentValue
else:
sc.sticky[cls.stickyKeys[key]] = cls.values[key]
def getInput():
"""
Get breps with optional input.
"""
go = ri.Custom.GetObject()
go.SetCommandPrompt("Select brep(s/faces)")
go.GeometryFilter = rd.ObjectType.Brep
go.AcceptNumber(True, acceptZero=True)
idxs_Opt = {}
def addOption(key): idxs_Opt[key] = Opts.addOption(go, key)
while True:
go.ClearCommandOptions()
idxs_Opt.clear()
addOption('iPullDir')
addOption('fDraftAngle_Deg')
if Opts.values['fDraftAngle_Deg'] == 0.0:
addOption('bUseDraftComputeFor0')
addOption('fDistTol')
addOption('fAngle_Tol_Deg')
addOption('bSimplifyRes')
if Opts.values['bSimplifyRes']:
addOption('bArcOK')
addOption('bDeg2')
addOption('bDeg3')
addOption('bDeg5')
addOption('bSplitNonG2')
addOption('bEcho')
addOption('bDebug')
res = go.GetMultiple(minimumNumber=1, maximumNumber=0)
if res == ri.GetResult.Cancel:
go.Dispose()
return
if res == ri.GetResult.Object:
objrefs = go.Objects()
go.Dispose()
return objrefs
if res == ri.GetResult.Number:
key = 'fDraftAngle_Deg'
Opts.riOpts[key].CurrentValue = go.Number()
Opts.setValue(key)
continue
if go.OptionIndex() == idxs_Opt['iPullDir']:
Opts.values['iPullDir'] = (
go.Option().CurrentListOptionIndex)
if Opts.listValues['iPullDir'][go.Option().CurrentListOptionIndex] == 'Custom':
rc = rs.GetLine(
mode=1, point=None,
message1="Point for pull direction from",
message3="Point for pull direction to",
)
if not rc:
print("Failed to get pull direction.")
continue
key = 'vectCustom'
Opts.values[key] = rg.Vector3d(rc[1] - rc[0])
Opts.values[key].Unitize()
sc.sticky[Opts.stickyKeys[key]] = Opts.values[key]
Opts.setValue(key, go.Option().CurrentListOptionIndex)
continue
for key in idxs_Opt:
if go.Option().Index == idxs_Opt[key]:
Opts.setValue(key, go.Option().CurrentListOptionIndex)
break
def formatDistance(fDistance, iPrecision=15):
if fDistance is None: return "(No deviation provided)"
if fDistance < 0.01:
return "{:.{}e}".format(fDistance, iPrecision)
if fDistance < 0.1:
return "{:.{}g}".format(fDistance, iPrecision+1)
return "{:.{}g}".format(fDistance, iPrecision)
def _getDirectionVector(iPullDir):
sDirs = Opts.listValues['iPullDir']
if sDirs[iPullDir] == 'CPlanePosX':
return sc.doc.Views.ActiveView.ActiveViewport.ConstructionPlane().XAxis
if sDirs[iPullDir] == 'CPlaneNegX':
return -sc.doc.Views.ActiveView.ActiveViewport.ConstructionPlane().XAxis
if sDirs[iPullDir] == 'CPlanePosY':
return sc.doc.Views.ActiveView.ActiveViewport.ConstructionPlane().YAxis
if sDirs[iPullDir] == 'CPlaneNegY':
return -sc.doc.Views.ActiveView.ActiveViewport.ConstructionPlane().YAxis
if sDirs[iPullDir] == 'CPlanePosZ':
return sc.doc.Views.ActiveView.ActiveViewport.ConstructionPlane().ZAxis
if sDirs[iPullDir] == 'CPlaneNegZ':
return -sc.doc.Views.ActiveView.ActiveViewport.ConstructionPlane().ZAxis
elif sDirs[iPullDir] == 'WorldPosX':
return rg.Vector3d.XAxis
elif sDirs[iPullDir] == 'WorldNegX':
return -rg.Vector3d.XAxis
elif sDirs[iPullDir] == 'WorldPosY':
return rg.Vector3d.YAxis
elif sDirs[iPullDir] == 'WorldNegY':
return -rg.Vector3d.YAxis
elif sDirs[iPullDir] == 'WorldPosZ':
return rg.Vector3d.ZAxis
elif sDirs[iPullDir] == 'WorldNegZ':
return -rg.Vector3d.ZAxis
elif sDirs[iPullDir] == 'View':
return sc.doc.Views.ActiveView.ActiveViewport.GetCameraFrame()[1].ZAxis
elif sDirs[iPullDir] == 'Custom':
return Opts.values['vectCustom']
raise Exception("Error in getDirectionVector.")
def _tangentAngleDifference(cA, cB, bDebug=False):
tanDiffAtStart = rg.Vector3d.VectorAngle(cA.TangentAtStart, cB.TangentAtStart)
tanDiffAtEnd = rg.Vector3d.VectorAngle(cA.TangentAtEnd, cB.TangentAtEnd)
if bDebug:
sEval='Rhino.RhinoMath.ToDegrees(tanDiffAtStart)'; print(sEval+':',eval(sEval))
sEval='Rhino.RhinoMath.ToDegrees(tanDiffAtEnd)'; print(sEval+':',eval(sEval))
def _areEpsilonEqual(a, b, epsilon):
# This is a relative comparison.
delta = abs(a - b)
fRelComp = delta / max(abs(a), abs(b))
return fRelComp < epsilon
def doesCurveSelfIntersect(rgC, tolerance):
if tolerance is None: tolerance = sc.doc.ModelAbsoluteTolerance
rc = rg.Intersect.Intersection.CurveSelf(rgC, tolerance)
return bool(rc)
def create_hi_def_pull_to_face(rgFace, rgC_on_face, tolerance_forRef=1e-7, bDebug=False):
pulled = rgC_on_face.PullToBrepFace(face=rgFace, tolerance=tolerance_forRef)
if len(pulled) == 1:
return pulled[0]
else:
pullback = rgFace.Pullback(rgC_on_face, tolerance=tolerance_forRef)
pushup = rgFace.Pushup(pullback, tolerance=tolerance_forRef)
if bDebug:
sEval='pullback.GetType().Name'; print(sEval+':',eval(sEval))
sEval='pushup.GetType().Name'; print(sEval+':',eval(sEval))
# sc.doc.Objects.AddCurve(rgC_on_face); sc.doc.Views.Redraw()
# raise Exception("PullToBrepFace produced {} curves, but should have been 1.".format(
# len(pulled)))
return pushup
def create_normal_def_pull_to_face(rgFace, rgC_on_face, tolerance, bDebug=False):
pulled = rgC_on_face.PullToBrepFace(face=rgFace, tolerance=tolerance)
if len(pulled) == 1:
return pulled[0]
else:
pullback = rgFace.Pullback(rgC_on_face, tolerance=tolerance)
pushup = rgFace.Pushup(pullback, tolerance=tolerance)
if bDebug:
sEval='pullback.GetType().Name'; print(sEval+':',eval(sEval))
sEval='pushup.GetType().Name'; print(sEval+':',eval(sEval))
# sc.doc.Objects.AddCurve(rgC_on_face); sc.doc.Views.Redraw()
# raise Exception("PullToBrepFace produced {} curves, but should have been 1.".format(
# len(pulled)))
return pushup
def isCurveOnFace(rgC_on_face, rgFace, tolerance, bDebug=False):
hi_def_pull = create_hi_def_pull_to_face(rgFace, rgC_on_face)
bSuccess, fDistMax = rg.Curve.GetDistancesBetweenCurves(
rgC_on_face, hi_def_pull, tolerance=0.1*tolerance)[:2]
if not bSuccess:
# Some results where this occurs:
# Closed curves that are collapse, appearing like an open segment.
return
sc.doc.Objects.AddCurve(rgC_on_face)
sc.doc.Objects.AddCurve(hi_def_pull)
sc.doc.Views.Redraw()
raise Exception("GetDistancesBetweenCurves failed.")
hi_def_pull.Dispose()
# 1e-5 is an additional tolerance helper for when the tolerance is arguably negligibly missed.
helper = 1e-5
if bDebug:
if fDistMax > tolerance:
missed = fDistMax-tolerance
if missed > helper:
print("Tolerance was missed by {}.".format(missed))
print("Recommended helper to deviation check: {:.0e}".format(missed))
if fDistMax > (tolerance + helper):
if bDebug:
print("Tolerance is {}, but curve is {} off of face.".format(
tolerance, fDistMax))
#if isinstance(rgFace.UnderlyingSurface(), rg.RevSurface):
# pass
#elif isinstance(rgFace.UnderlyingSurface(), rg.NurbsSurface) and rgFace.UnderlyingSurface().IsRational:
# pass
#else:
# sc.doc.Objects.AddSurface(rgFace)
# sc.doc.Objects.AddCurve(rgC_on_face)
# sc.doc.Objects.AddCurve(hi_def_pull)
# sc.doc.Views.Redraw()
# 1/0
return False
return True
def isUniformNurbsCurve(nc):
if not isinstance(nc, rg.NurbsCurve):
return
if nc.SpanCount == 1:
return True
if nc.Knots.KnotStyle in (rg.KnotStyle.QuasiUniform, rg.KnotStyle.Uniform):
return True
return False
# Any internal polyknots?
start = 0 if nc.IsPeriodic else nc.Degree
end = nc.Knots.Count - (0 if nc.IsPeriodic else nc.Degree) - 1
for i in range(start, end):
if nc.Knots.KnotMultiplicity(i) > 1:
return False
# Any non-uniform knot spans?
start = 0 if nc.IsPeriodic else nc.Degree - 1
end = nc.Knots.Count - (0 if nc.IsPeriodic else nc.Degree - 1) - 1
span0 = nc.Knots[start+1] - nc.Knots[start]
for i in range(start+1, end):
if nc.Knots.KnotMultiplicity(i) > 1:
return False
if not _areEpsilonEqual(
span0, nc.Knots[i+1] - nc.Knots[i],
epsilon=(1.0/2**32)):
return False
return True
def is_NurbsCrv_internally_G2_continuous(nc, fAngle_Tol_Deg, bDebug=False):
if not isinstance(nc, rg.NurbsCurve):
raise ValueError("{} passed to is_NurbsCrv_internally_G2_continuous.".format(nc))
if nc.Degree >= 3 and isUniformNurbsCurve(nc):
return True
cosAngleTolerance = math.cos(math.radians(fAngle_Tol_Deg))
bFoundG1_discont, t = nc.GetNextDiscontinuity(
continuityType=rg.Continuity.G2_locus_continuous if nc.IsPeriodic else rg.Continuity.G2_continuous,
t0=nc.Domain.T0,
t1=nc.Domain.T1,
cosAngleTolerance=cosAngleTolerance,
curvatureTolerance=Rhino.RhinoMath.UnsetValue) # Value for curvatureTolerance doesn't seem to have an effect for finding G2 discontinuities.
if bFoundG1_discont:
if bDebug: print("First G2 discontinuity found at {}.".format(t))
return False
return True
def rebuild_to_Bezier(nc_In, iDegs, tolerance, bDebug=False):
"""
More strict tolerance used on degree 2 since that Bezier doesn't allow
tangency matching of both ends when they are not already aligned.
Returns on success: rg.NurbsCurve, float(deviation)
Returns on fail: None
"""
if bDebug: print("rebuild_Bezier with tolerance={}:".format(tolerance))
for iDeg in iDegs:
pointCount = iDeg + 1
rebuilt = nc_In.Rebuild(
pointCount=pointCount,
degree=iDeg,
preserveTangents=True)
bSuccess, fDistMax = rg.Curve.GetDistancesBetweenCurves(
nc_In, rebuilt, tolerance=0.1*tolerance)[:2]
if bSuccess:
if iDeg==2:
if fDistMax < 1e-6:
if bDebug:
print("Rebuilt within {} Deg:{} PtCt:{}".format(
fDistMax, iDeg, pointCount))
_tangentAngleDifference(nc_In, rebuilt, bDebug)
return rebuilt, fDistMax
elif fDistMax <= tolerance:
if bDebug:
print("Rebuilt within {} Deg:{} PtCt:{}".format(
fDistMax, iDeg, pointCount))
_tangentAngleDifference(nc_In, rebuilt, bDebug)
return rebuilt, fDistMax
if bDebug:
print("Rebuild requires {} Deg:{} PtCt:{}".format(
fDistMax, iDeg, pointCount))
rebuilt.Dispose()
def rebuild_to_MultiSpan(nc_In, iDegs, tolerance, bDebug=False):
"""
Will not bother rebuilding to degree-2 since multiple spans are divided by
G1-likely knots.
"""
if bDebug: print("rebuild_MultiSpan with tolerance={}:".format(tolerance))
iCt_MaxSpans = nc_In.SpanCount
#iCt_MaxCp = int(round(nc.GetLength() / (100.0 * sc.doc.ModelAbsoluteTolerance)))
#if bDebug: sEval='iCt_MaxCp'; print(sEval+':',eval(sEval))
# Rebuild at maximum control point count.
#pointCount = iCt_MaxCp
iDegs_ForRebuildSearch = []
rebuilts_LastSuccess = [] # per iDeg.
fDevs = [] # per iDeg.
for iDeg in iDegs:
if iDeg < 3: continue
pointCount = iDeg + iCt_MaxSpans
rebuilt = nc_In.Rebuild(
pointCount=pointCount,
degree=iDeg,
preserveTangents=True)
bSuccess, fDistMax = rg.Curve.GetDistancesBetweenCurves(
nc_In,
rebuilt,
tolerance=0.1*tolerance)[:2]
if bSuccess and fDistMax <= tolerance:
iDegs_ForRebuildSearch.append(iDeg)
rebuilts_LastSuccess.append(rebuilt)
fDevs.append(fDistMax)
if bDebug:
print("Rebuilt within {} Deg:{} PtCt:{}".format(
tolerance, iDeg, pointCount))
else:
rebuilt.Dispose()
if not iDegs_ForRebuildSearch:
if bDebug:
print("Not rebuilt within {} at max. span ct. of {}, so quitting rebuilding.".format(
tolerance, iCt_MaxSpans))
return
if bDebug: print("Binary search.")
for i, iDeg in enumerate(iDegs_ForRebuildSearch):
iCt_MaxCp = iDeg + iCt_MaxSpans
iCts_Cps_Tried = [iDeg + 1, iCt_MaxCp]
iCt_Cp_Try = (iCt_MaxCp + iDeg + 1) // 2
while iCt_Cp_Try not in iCts_Cps_Tried:
sc.escape_test()
rebuilt = nc_In.Rebuild(
pointCount=iCt_Cp_Try,
degree=iDeg,
preserveTangents=True)
bSuccess, fDistMax = rg.Curve.GetDistancesBetweenCurves(
nc_In, rebuilt, tolerance=0.1*tolerance)[:2]
if bDebug:
print("Degree:{} CPtCt:{} fDistMax:{} WithinTol:{}".format(
iDeg,
iCt_Cp_Try,
fDistMax if bSuccess else bSuccess,
fDistMax <= tolerance if bSuccess else bSuccess
))
iCts_Cps_Tried.append(iCt_Cp_Try)
iCts_Cps_Tried.sort()
if bSuccess and fDistMax <= tolerance:
rebuilts_LastSuccess[i].Dispose()
rebuilts_LastSuccess[i] = rebuilt
fDevs[i] = fDistMax
# Bisect left.
iCt_Cp_Try = (
(iCt_Cp_Try +
iCts_Cps_Tried[iCts_Cps_Tried.index(iCt_Cp_Try)-1]) // 2)
else:
rebuilt.Dispose()
# Bisect right.
iCt_Cp_Try = (
(iCt_Cp_Try +
iCts_Cps_Tried[iCts_Cps_Tried.index(iCt_Cp_Try)+1]) // 2)
if len(rebuilts_LastSuccess) == 1:
_tangentAngleDifference(nc_In, rebuilts_LastSuccess[0], bDebug)
return rebuilts_LastSuccess[0], fDevs[0]
# TODO: Change the winner to that with minimum deviation instead of least CPs?
iCts_Pts = [nc_In.Points.Count for nc_In in rebuilts_LastSuccess]
idx_Winner = iCts_Pts.index(min(iCts_Pts))
_tangentAngleDifference(nc_In, rebuilts_LastSuccess[idx_Winner], bDebug)
return rebuilts_LastSuccess[idx_Winner], fDevs[idx_Winner]
def removeMultiKnots(nc_In, iDegs, tolerance, bDebug):
"""
Returns on success: rg.NurbsCurve, float(deviation)
Returns on fail: None
minimumMultiplicity: Remove knots with multiplicity > minimumKnotMultiplicity.
maximumMultiplicity: Remove knots with multiplicity < maximumKnotMultiplicity.
"""
if bDebug: print("removeMultiKnots:".format(tolerance))
#iDegs = range(2, 7+1)
for iDeg in iDegs:
if iDeg < nc_In.Degree: continue
for minimumMultiplicity in range(1, iDeg-2+1):
nc_WIP = nc_In.DuplicateCurve()
if iDeg > nc_In.Degree:
nc_WIP.IncreaseDegree(iDeg)
iCt_KnotsRemoved = nc_WIP.Knots.RemoveMultipleKnots(
minimumMultiplicity=minimumMultiplicity,
maximumMultiplicity=iDeg+1,
tolerance=1.0)
if not iCt_KnotsRemoved:
if bDebug: print("RemoveMultipleKnots failed to remove any knots.")
nc_WIP.Dispose()
continue # to next minimumMultiplicity.
bSuccess, fDev = rg.Curve.GetDistancesBetweenCurves(
nc_WIP, nc_In, tolerance=0.1*tolerance)[:2]
if not bSuccess:
nc_WIP.Dispose()
continue # to next minimumMultiplicity.
if bDebug: sEval='fDev'; print(sEval+':',eval(sEval))
if fDev > tolerance:
nc_WIP.Dispose()
continue # to next minimumMultiplicity.
_tangentAngleDifference(nc_In, nc_WIP, bDebug)
return nc_WIP, fDev
def simplifyCurve(rgCrv_In, bArcOK=False, iDegs=(2,3,5), fTol=None, fAngle_Tol_Deg=None, bDebug=False):
"""
Simplify includes:
Uniform knot vectors.
Returns on success: rg.ArcCurve, rgLineCurve, or simplified rg.NurbsCurve.
Returns on fail: None
"""
if bDebug: print("simplifyCurve with fTol={}:".format(fTol))
rgCrvs_Out = []
fTol_Min = 1e-6
if fTol is None:
fTol = max((fTol_Min, 0.1*sc.doc.ModelAbsoluteTolerance))
if fAngle_Tol_Deg is None:
fAngle_Tol_Deg = sc.doc.ModelAngleToleranceDegrees
fTol_MaxRad = 1e3
if isinstance(rgCrv_In, (rg.PolylineCurve, rg.PolyCurve)):
raise Exception("Input is {}.".format(rgCrv_In.GetType().Name))
if isinstance(rgCrv_In, (rg.ArcCurve, rg.LineCurve)):
print("Curve is already a {}. How did that happen?".format(rgCrv_In.GetType().Name))
return rgCrv_In.DuplicateCurve()
nc_In = rgCrv_In
if not nc_In.IsClosed:
if nc_In.IsLinear(fTol_Min):
return rg.LineCurve(
nc_In.PointAtStart,
nc_In.PointAtEnd)
if bArcOK:
if nc_In.IsClosed:
b, circle = nc_In.TryGetCircle(fTol_Min)
if b:
if circle.Radius <= fTol_MaxRad:
return rg.ArcCurve(circle)
else:
b, arc = nc_In.TryGetArc(fTol_Min)
if b:
if arc.Radius <= fTol_MaxRad:
return rg.ArcCurve(arc)
## Just keep rational result.
## TODO: Remove this?
#if nc_In.IsRational:
# return nc_In.Duplicate()
if isUniformNurbsCurve(nc_In):
return nc_In.Duplicate()
rc = rebuild_to_Bezier(
nc_In,
iDegs=iDegs,
tolerance=fTol,
bDebug=bDebug)
if rc:
return rc[0]
rc = removeMultiKnots(nc_In, iDegs, fTol, bDebug)
if rc: return rc[0]
#if is_NurbsCrv_internally_G2_continuous(nc_In, fAngle_Tol_Deg, bDebug):
# rc = removeMultiKnots(nc_In, iDegs, fTol, bDebug)
# if rc: return rc[0]
rc = rebuild_to_MultiSpan(
nc_In,
iDegs=iDegs,
tolerance=fTol,
bDebug=bDebug)
if rc:
return rc[0]
def split_NurbsCrv_at_G2_discontinuities(nc_In, angleToleranceRadians, bDebug=False):
if not isinstance(nc_In, rg.NurbsCurve):
raise ValueError("{} passed to split_NurbsCrv_at_G2_discontinuities.".format(nc_In))
cosAngleTolerance = math.cos(angleToleranceRadians)
t0 = nc_In.Domain.T0 # Start parameter of check. Is itself ignored.
ts_Found = []
while True:
sc.escape_test()
bFoundG1_discont, t = nc_In.GetNextDiscontinuity(
continuityType=rg.Continuity.G2_locus_continuous if nc_In.IsPeriodic else rg.Continuity.G2_continuous,
t0=t0,
t1=nc_In.Domain.T1,
cosAngleTolerance=cosAngleTolerance,
curvatureTolerance=Rhino.RhinoMath.UnsetValue) # Value for curvatureTolerance doesn't seem to have an effect for finding G2 discontinuities.
if not bFoundG1_discont:
break # out of while loop.
ts_Found.append(t)
t0 = t
if len(ts_Found) == 0:
return
split = nc_In.Split(ts_Found)
if len(split) < 2:
s = "Split produced {} curves. Should have been {}.".format(
len(split), len(ts_Found)+1)
print(s)
sc.doc.Objects.AddCurve(nc_In)
[sc.doc.Objects.AddCurve(c) for c in split]
raise Exception(s)
joined = rg.Curve.JoinCurves(split)
if len(joined) != 1:
raise Exception("JoinCurves produced {} curves. Should have been 1.".format(
len(joined)))
for c in split: c.Dispose()
return joined
def split_NurbsCrvs_at_G2_discontinuities(rgCrvs_In, angleToleranceRadians, bDebug=False):
"""
Return: list(Curves) with splits and duplicates,
It is up to the calling code to Dispose the curves in the original list.
"""
rgCs_Out = []
for c in rgCrvs_In:
if not isinstance(c, rg.NurbsCurve):
rgCs_Out.append(c.DuplicateCurve())
continue
rc = split_NurbsCrv_at_G2_discontinuities(c, angleToleranceRadians, bDebug=bDebug)
if rc is None:
rgCs_Out.append(c.DuplicateCurve())
continue
rgCs_Out.extend(rc)
return rgCs_Out
def createSilhouetteCurves(rgGeomForSilh, **kwargs):
"""
Main function that calls the "createSilhouetteCurves..." functions,
and post-processes the results.
Parameters:
rgGeomForSilh
kwargs:
iPullDir
fDraftAngle_Deg
fDistTol
fAngle_Tol_Deg
bSimplifyRes
bArcOK
bDeg3
bDeg5
bSplitNonG2
bEcho
bDebug
"""
if Rhino.RhinoApp.ExeVersion < 7:
print("This function requires Rhino 7 or higher.")
return
def getOpt(key): return kwargs[key] if key in kwargs else Opts.values[key]
iPullDir = getOpt('iPullDir')
fDraftAngle_Deg = getOpt('fDraftAngle_Deg')
bUseDraftComputeFor0 = getOpt('bUseDraftComputeFor0')
fDistTol = getOpt('fDistTol')
fAngle_Tol_Deg = getOpt('fAngle_Tol_Deg')
bSimplifyRes = getOpt('bSimplifyRes')
bArcOK = getOpt('bArcOK')
bDeg2 = getOpt('bDeg2')
bDeg3 = getOpt('bDeg3')
bDeg5 = getOpt('bDeg5')
bSplitNonG2 = getOpt('bSplitNonG2')
bEcho = getOpt('bEcho')
bDebug = getOpt('bDebug')
# Prepare variables to be passed to Compute or ComputeDraftCurves.
draftAngleRadians = math.radians(fDraftAngle_Deg)
pullDirection = _getDirectionVector(Opts.values['iPullDir'])
tol_ForCompute_or_CDC = 0.5*fDistTol if bSimplifyRes else fDistTol
angleToleranceRadians = math.radians(fAngle_Tol_Deg)
iDegs = []
if bDeg2:
iDegs.append(2)
if bDeg3:
iDegs.append(3)
if bDeg5:
iDegs.append(5)
if not iDegs and bEcho:
print("No degrees for rebuild.")
if isinstance(rgGeomForSilh, rg.Brep):
rgFs = rgGeomForSilh.Faces
elif isinstance(rgGeomForSilh, rg.BrepFace):
rgFs = [rgGeomForSilh]
else:
raise ValueError("{} is not supported for this script.".format(rgGeomForSilh.GetType().Name))
if (fDraftAngle_Deg != 0.0) or bUseDraftComputeFor0:
bUseDraftCompute = True
silhTypes_Allowed = rg.SilhouetteType.DraftCurve, rg.SilhouetteType.Tangent
else:
# Use Silhouette.Compute.
bUseDraftCompute = False
silhTypes_Allowed = rg.SilhouetteType.Tangent,
if bDebug:
sEval='fDraftAngle_Deg'; print(sEval+':',eval(sEval))
sEval='draftAngleRadians'; print(sEval+':',eval(sEval))
sEval="Opts.values['iPullDir']"; print(sEval+':',eval(sEval))
sEval='pullDirection'; print(sEval+':',eval(sEval))
sEval='fDistTol'; print(sEval+':',eval(sEval))
sEval='fAngle_Tol_Deg'; print(sEval+':',eval(sEval))
sEval='angleToleranceRadians'; print(sEval+':',eval(sEval))
sEval='iDegs'; print(sEval+':',eval(sEval))
sEval='bUseDraftCompute'; print(sEval+':',eval(sEval))
sEval='silhTypes_Allowed'; print(sEval+':',eval(sEval))
rgCs_WIP = []
#fLengths_Totals = [0.0]
Rhino.RhinoApp.SetCommandPrompt("Collecting filtered silhouette curves ...")
for rgF in rgFs:
if bUseDraftCompute:
silhouettes = rg.Silhouette.ComputeDraftCurve(
geometry=rgF,
draftAngle=draftAngleRadians,
pullDirection=pullDirection,
tolerance=tol_ForCompute_or_CDC,
angleToleranceRadians=angleToleranceRadians)
else:
silhouettes = rg.Silhouette.Compute(
geometry=rgF,
silhouetteType=rg.SilhouetteType.Tangent,
parallelCameraDirection=pullDirection,
tolerance=tol_ForCompute_or_CDC,
angleToleranceRadians=angleToleranceRadians)
if not silhouettes:
continue
for silh in silhouettes:
if silh.Curve is None:
continue
if silh.SilhouetteType not in silhTypes_Allowed:
if bDebug: print("Skipped {}.".format(silh.SilhouetteType))
continue
fLength = silh.Curve.GetLength()
if fLength < tol_ForCompute_or_CDC: