def buildNurbsRibbon(self): if self.guideSpline: guideDeg = cmds.getAttr(self.guideSpline + '.degree' ) guideSpan = cmds.getAttr(self.guideSpline + '.spans' ) oneCurvePoints = [] otherCurvePoints = [] for i in xrange(guideDeg + guideSpan): cvPos = cmds.pointPosition(self.guideSpline + '.cv[' + str(i) + "]", w=True ) newPara = cmds.closestPointOnCurve(self.guideSpline, ip=cvPos, paramU=True) #Find the parameter Value newParaVal = cmds.getAttr(newPara + ".paramU") cmds.delete(newPara) infoNode = cmds.pointOnCurve(self.guideSpline, ch=True, pr=newParaVal) #Now find the Position and tangent! posy = (cmds.getAttr(infoNode + ".position"))[0] # returns the position posy = MVector(posy[0],posy[1],posy[2]) normy = (cmds.getAttr(infoNode + ".tangent"))[0] normy = MVector(normy[0],normy[1],normy[2]) #Use MVector from maya.openMaya normy = normy.normal() vertVect = MVector(0,1,0) sideMove = normy^vertVect #This is the notation for a cross product. Pretty cool. Should be a normal movement sideMove = sideMove.normal() * 0.5 sideMovePos = posy + sideMove otherSideMovePos = posy - sideMove oneCurvePoints.append([sideMovePos[0],sideMovePos[1],sideMovePos[2]]) otherCurvePoints.append([otherSideMovePos[0],otherSideMovePos[1],otherSideMovePos[2]]) oneSideCurve = cmds.curve(editPoint = oneCurvePoints, degree=3) OtherSideCurve = cmds.curve(editPoint = otherCurvePoints, degree=3) self.tempConstructionParts.append(oneSideCurve) self.tempConstructionParts.append(OtherSideCurve) #Now we loft the surface between the two Curves! nameStart = nameBase(self.totalMarkerList[0].getName(), self.searchString, "loc", "nbs") nameStart += "ribbonSurface" self.guideNurbsRibbon = cmds.loft(oneSideCurve, OtherSideCurve, name = nameStart, constructionHistory = True, uniform = True, close = False, autoReverse = True, degree = 3, sectionSpans = 1, range = False, polygon = 0, reverseSurfaceNormals = True) self.guideNurbsRibbon = self.guideNurbsRibbon[0] self.ribbonParts.append(self.guideNurbsRibbon)
def buildNurbsRibbon(self):
if self.guideSpline:
guideDeg = cmds.getAttr(self.guideSpline + '.degree')
guideSpan = cmds.getAttr(self.guideSpline + '.spans')
oneCurvePoints = []
otherCurvePoints = []
for i in xrange(guideDeg + guideSpan):
cvPos = cmds.pointPosition(self.guideSpline + '.cv[' + str(i) +
"]",
w=True)
newPara = cmds.closestPointOnCurve(
self.guideSpline, ip=cvPos,
paramU=True) #Find the parameter Value
newParaVal = cmds.getAttr(newPara + ".paramU")
cmds.delete(newPara)
infoNode = cmds.pointOnCurve(
self.guideSpline, ch=True,
pr=newParaVal) #Now find the Position and tangent!
posy = (cmds.getAttr(infoNode +
".position"))[0] # returns the position
posy = MVector(posy[0], posy[1], posy[2])
normy = (cmds.getAttr(infoNode + ".tangent"))[0]
normy = MVector(normy[0], normy[1],
normy[2]) #Use MVector from maya.openMaya
normy = normy.normal()
vertVect = MVector(0, 1, 0)
sideMove = normy ^ vertVect #This is the notation for a cross product. Pretty cool. Should be a normal movement
sideMove = sideMove.normal() * 0.5
sideMovePos = posy + sideMove
otherSideMovePos = posy - sideMove
oneCurvePoints.append(
[sideMovePos[0], sideMovePos[1], sideMovePos[2]])
otherCurvePoints.append([
otherSideMovePos[0], otherSideMovePos[1],
otherSideMovePos[2]
])
oneSideCurve = cmds.curve(editPoint=oneCurvePoints, degree=3)
OtherSideCurve = cmds.curve(editPoint=otherCurvePoints, degree=3)
self.tempConstructionParts.append(oneSideCurve)
self.tempConstructionParts.append(OtherSideCurve)
#Now we loft the surface between the two Curves!
nameStart = nameBase(self.totalMarkerList[0].getName(),
self.searchString, "loc", "nbs")
nameStart += "ribbonSurface"
self.guideNurbsRibbon = cmds.loft(oneSideCurve,
OtherSideCurve,
name=nameStart,
constructionHistory=True,
uniform=True,
close=False,
autoReverse=True,
degree=3,
sectionSpans=1,
range=False,
polygon=0,
reverseSurfaceNormals=True)
self.guideNurbsRibbon = self.guideNurbsRibbon[0]
self.ribbonParts.append(self.guideNurbsRibbon)
def averageNormals(normalLs, normalise):
"""Return the average vector of a list of MVectors
If normalise is true, return the normalised vector (length 1)
"""
sumX = sumY = sumZ = 0
count = len(normalLs)
for normal in normalLs:
sumX += normal.x
sumY += normal.y
sumZ += normal.z
avg = MVector(sumX / count, sumY / count, sumZ / count)
if normalise:
avg = avg.normal()
return avg
