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curve_assign_shapekey.py
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curve_assign_shapekey.py
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# SPDX-License-Identifier: GPL-3.0-or-later
# Copyright (C) 2019 Shrinivas Kulkarni
# This Blender add-on assigns one or more Bezier Curves as shape keys to another
# Bezier Curve
#
# Supported Blender Versions: 2.8x
#
# https://github.com/Shriinivas/assignshapekey/blob/master/LICENSE
import bpy, bmesh, gpu
from gpu_extras.batch import batch_for_shader
from bpy.props import BoolProperty, EnumProperty, StringProperty
from collections import OrderedDict
from mathutils import Vector
from math import sqrt, floor
from functools import cmp_to_key
from bpy.types import Panel, Operator, AddonPreferences
bl_info = {
"name": "Assign Shape Keys",
"author": "Shrinivas Kulkarni",
"version": (1, 0, 2),
"blender": (3, 0, 0),
"location": "View 3D > Sidebar > Edit Tab",
"description": "Assigns one or more Bezier curves as shape keys to another Bezier curve",
"doc_url": "{BLENDER_MANUAL_URL}/addons/add_curve/assign_shape_keys.html",
"category": "Add Curve",
}
alignList = [('minX', 'Min X', 'Align vertices with Min X'),
('maxX', 'Max X', 'Align vertices with Max X'),
('minY', 'Min Y', 'Align vertices with Min Y'),
('maxY', 'Max Y', 'Align vertices with Max Y'),
('minZ', 'Min Z', 'Align vertices with Min Z'),
('maxZ', 'Max Z', 'Align vertices with Max Z')]
matchList = [('vCnt', 'Vertex Count', 'Match by vertex count'),
('bbArea', 'Area', 'Match by surface area of the bounding box'), \
('bbHeight', 'Height', 'Match by bounding box height'), \
('bbWidth', 'Width', 'Match by bounding box width'),
('bbDepth', 'Depth', 'Match by bounding box depth'),
('minX', 'Min X', 'Match by bounding box Min X'),
('maxX', 'Max X', 'Match by bounding box Max X'),
('minY', 'Min Y', 'Match by bounding box Min Y'),
('maxY', 'Max Y', 'Match by bounding box Max Y'),
('minZ', 'Min Z', 'Match by bounding box Min Z'),
('maxZ', 'Max Z', 'Match by bounding box Max Z')]
DEF_ERR_MARGIN = 0.0001
def isBezier(obj):
return obj.type == 'CURVE' and len(obj.data.splines) > 0 \
and obj.data.splines[0].type == 'BEZIER'
#Avoid errors due to floating point conversions/comparisons
#TODO: return -1, 0, 1
def floatCmpWithMargin(float1, float2, margin = DEF_ERR_MARGIN):
return abs(float1 - float2) < margin
def vectCmpWithMargin(v1, v2, margin = DEF_ERR_MARGIN):
return all(floatCmpWithMargin(v1[i], v2[i], margin) for i in range(0, len(v1)))
class Segment():
#pts[0] - start, pts[1] - ctrl1, pts[2] - ctrl2, , pts[3] - end
def pointAtT(pts, t):
return pts[0] + t * (3 * (pts[1] - pts[0]) +
t* (3 * (pts[0] + pts[2]) - 6 * pts[1] +
t * (-pts[0] + 3 * (pts[1] - pts[2]) + pts[3])))
def getSegLenRecurs(pts, start, end, t1 = 0, t2 = 1, error = DEF_ERR_MARGIN):
t1_5 = (t1 + t2)/2
mid = Segment.pointAtT(pts, t1_5)
l = (end - start).length
l2 = (mid - start).length + (end - mid).length
if (l2 - l > error):
return (Segment.getSegLenRecurs(pts, start, mid, t1, t1_5, error) +
Segment.getSegLenRecurs(pts, mid, end, t1_5, t2, error))
return l2
def __init__(self, start, ctrl1, ctrl2, end):
self.start = start
self.ctrl1 = ctrl1
self.ctrl2 = ctrl2
self.end = end
pts = [start, ctrl1, ctrl2, end]
self.length = Segment.getSegLenRecurs(pts, start, end)
#see https://stackoverflow.com/questions/878862/drawing-part-of-a-b%c3%a9zier-curve-by-reusing-a-basic-b%c3%a9zier-curve-function/879213#879213
def partialSeg(self, t0, t1):
pts = [self.start, self.ctrl1, self.ctrl2, self.end]
if(t0 > t1):
tt = t1
t1 = t0
t0 = tt
#Let's make at least the line segments of predictable length :)
if(pts[0] == pts[1] and pts[2] == pts[3]):
pt0 = Vector([(1 - t0) * pts[0][i] + t0 * pts[2][i] for i in range(0, 3)])
pt1 = Vector([(1 - t1) * pts[0][i] + t1 * pts[2][i] for i in range(0, 3)])
return Segment(pt0, pt0, pt1, pt1)
u0 = 1.0 - t0
u1 = 1.0 - t1
qa = [pts[0][i]*u0*u0 + pts[1][i]*2*t0*u0 + pts[2][i]*t0*t0 for i in range(0, 3)]
qb = [pts[0][i]*u1*u1 + pts[1][i]*2*t1*u1 + pts[2][i]*t1*t1 for i in range(0, 3)]
qc = [pts[1][i]*u0*u0 + pts[2][i]*2*t0*u0 + pts[3][i]*t0*t0 for i in range(0, 3)]
qd = [pts[1][i]*u1*u1 + pts[2][i]*2*t1*u1 + pts[3][i]*t1*t1 for i in range(0, 3)]
pta = Vector([qa[i]*u0 + qc[i]*t0 for i in range(0, 3)])
ptb = Vector([qa[i]*u1 + qc[i]*t1 for i in range(0, 3)])
ptc = Vector([qb[i]*u0 + qd[i]*t0 for i in range(0, 3)])
ptd = Vector([qb[i]*u1 + qd[i]*t1 for i in range(0, 3)])
return Segment(pta, ptb, ptc, ptd)
#see https://stackoverflow.com/questions/24809978/calculating-the-bounding-box-of-cubic-bezier-curve
#(3 D - 9 C + 9 B - 3 A) t^2 + (6 A - 12 B + 6 C) t + 3 (B - A)
#pts[0] - start, pts[1] - ctrl1, pts[2] - ctrl2, , pts[3] - end
#TODO: Return Vectors to make world space calculations consistent
def bbox(self, mw = None):
def evalBez(AA, BB, CC, DD, t):
return AA * (1 - t) * (1 - t) * (1 - t) + \
3 * BB * t * (1 - t) * (1 - t) + \
3 * CC * t * t * (1 - t) + \
DD * t * t * t
A = self.start
B = self.ctrl1
C = self.ctrl2
D = self.end
if(mw != None):
A = mw @ A
B = mw @ B
C = mw @ C
D = mw @ D
MINXYZ = [min([A[i], D[i]]) for i in range(0, 3)]
MAXXYZ = [max([A[i], D[i]]) for i in range(0, 3)]
leftBotBack_rgtTopFront = [MINXYZ, MAXXYZ]
a = [3 * D[i] - 9 * C[i] + 9 * B[i] - 3 * A[i] for i in range(0, 3)]
b = [6 * A[i] - 12 * B[i] + 6 * C[i] for i in range(0, 3)]
c = [3 * (B[i] - A[i]) for i in range(0, 3)]
solnsxyz = []
for i in range(0, 3):
solns = []
if(a[i] == 0):
if(b[i] == 0):
solns.append(0)#Independent of t so lets take the starting pt
else:
solns.append(c[i] / b[i])
else:
rootFact = b[i] * b[i] - 4 * a[i] * c[i]
if(rootFact >=0 ):
#Two solutions with + and - sqrt
solns.append((-b[i] + sqrt(rootFact)) / (2 * a[i]))
solns.append((-b[i] - sqrt(rootFact)) / (2 * a[i]))
solnsxyz.append(solns)
for i, soln in enumerate(solnsxyz):
for j, t in enumerate(soln):
if(t < 1 and t > 0):
co = evalBez(A[i], B[i], C[i], D[i], t)
if(co < leftBotBack_rgtTopFront[0][i]):
leftBotBack_rgtTopFront[0][i] = co
if(co > leftBotBack_rgtTopFront[1][i]):
leftBotBack_rgtTopFront[1][i] = co
return leftBotBack_rgtTopFront
class Part():
def __init__(self, parent, segs, isClosed):
self.parent = parent
self.segs = segs
#use_cyclic_u
self.isClosed = isClosed
#Indicates if this should be closed based on its counterparts in other paths
self.toClose = isClosed
self.length = sum(seg.length for seg in self.segs)
self.bbox = None
self.bboxWorldSpace = None
def getSeg(self, idx):
return self.segs[idx]
def getSegs(self):
return self.segs
def getSegsCopy(self, start, end):
if(start == None):
start = 0
if(end == None):
end = len(self.segs)
return self.segs[start:end]
def getBBox(self, worldSpace):
#Avoid frequent calculations, as this will be called in compare method
if(not worldSpace and self.bbox != None):
return self.bbox
if(worldSpace and self.bboxWorldSpace != None):
return self.bboxWorldSpace
leftBotBack_rgtTopFront = [[None]*3,[None]*3]
for seg in self.segs:
if(worldSpace):
bb = seg.bbox(self.parent.curve.matrix_world)
else:
bb = seg.bbox()
for i in range(0, 3):
if (leftBotBack_rgtTopFront[0][i] == None or \
bb[0][i] < leftBotBack_rgtTopFront[0][i]):
leftBotBack_rgtTopFront[0][i] = bb[0][i]
for i in range(0, 3):
if (leftBotBack_rgtTopFront[1][i] == None or \
bb[1][i] > leftBotBack_rgtTopFront[1][i]):
leftBotBack_rgtTopFront[1][i] = bb[1][i]
if(worldSpace):
self.bboxWorldSpace = leftBotBack_rgtTopFront
else:
self.bbox = leftBotBack_rgtTopFront
return leftBotBack_rgtTopFront
#private
def getBBDiff(self, axisIdx, worldSpace):
obj = self.parent.curve
bbox = self.getBBox(worldSpace)
diff = abs(bbox[1][axisIdx] - bbox[0][axisIdx])
return diff
def getBBWidth(self, worldSpace):
return self.getBBDiff(0, worldSpace)
def getBBHeight(self, worldSpace):
return self.getBBDiff(1, worldSpace)
def getBBDepth(self, worldSpace):
return self.getBBDiff(2, worldSpace)
def bboxSurfaceArea(self, worldSpace):
leftBotBack_rgtTopFront = self.getBBox(worldSpace)
w = abs( leftBotBack_rgtTopFront[1][0] - leftBotBack_rgtTopFront[0][0] )
l = abs( leftBotBack_rgtTopFront[1][1] - leftBotBack_rgtTopFront[0][1] )
d = abs( leftBotBack_rgtTopFront[1][2] - leftBotBack_rgtTopFront[0][2] )
return 2 * (w * l + w * d + l * d)
def getSegCnt(self):
return len(self.segs)
def getBezierPtsInfo(self):
prevSeg = None
bezierPtsInfo = []
for j, seg in enumerate(self.getSegs()):
pt = seg.start
handleRight = seg.ctrl1
if(j == 0):
if(self.toClose):
handleLeft = self.getSeg(-1).ctrl2
else:
handleLeft = pt
else:
handleLeft = prevSeg.ctrl2
bezierPtsInfo.append([pt, handleLeft, handleRight])
prevSeg = seg
if(self.toClose == True):
bezierPtsInfo[-1][2] = seg.ctrl1
else:
bezierPtsInfo.append([prevSeg.end, prevSeg.ctrl2, prevSeg.end])
return bezierPtsInfo
def __repr__(self):
return str(self.length)
class Path:
def __init__(self, curve, objData = None, name = None):
if(objData == None):
objData = curve.data
if(name == None):
name = curve.name
self.name = name
self.curve = curve
self.parts = [Part(self, getSplineSegs(s), s.use_cyclic_u) for s in objData.splines]
def getPartCnt(self):
return len(self.parts)
def getPartView(self):
p = Part(self, [seg for part in self.parts for seg in part.getSegs()], None)
return p
def getPartBoundaryIdxs(self):
cumulCntList = set()
cumulCnt = 0
for p in self.parts:
cumulCnt += p.getSegCnt()
cumulCntList.add(cumulCnt)
return cumulCntList
def updatePartsList(self, segCntsPerPart, byPart):
monolithicSegList = [seg for part in self.parts for seg in part.getSegs()]
oldParts = self.parts[:]
currPart = oldParts[0]
partIdx = 0
self.parts.clear()
for i in range(0, len(segCntsPerPart)):
if( i == 0):
currIdx = 0
else:
currIdx = segCntsPerPart[i-1]
nextIdx = segCntsPerPart[i]
isClosed = False
if(vectCmpWithMargin(monolithicSegList[currIdx].start, \
currPart.getSegs()[0].start) and \
vectCmpWithMargin(monolithicSegList[nextIdx-1].end, \
currPart.getSegs()[-1].end)):
isClosed = currPart.isClosed
self.parts.append(Part(self, \
monolithicSegList[currIdx:nextIdx], isClosed))
if(monolithicSegList[nextIdx-1] == currPart.getSegs()[-1]):
partIdx += 1
if(partIdx < len(oldParts)):
currPart = oldParts[partIdx]
def getBezierPtsBySpline(self):
data = []
for i, part in enumerate(self.parts):
data.append(part.getBezierPtsInfo())
return data
def getNewCurveData(self):
newCurveData = self.curve.data.copy()
newCurveData.splines.clear()
splinesData = self.getBezierPtsBySpline()
for i, newPoints in enumerate(splinesData):
spline = newCurveData.splines.new('BEZIER')
spline.bezier_points.add(len(newPoints)-1)
spline.use_cyclic_u = self.parts[i].toClose
for j in range(0, len(spline.bezier_points)):
newPoint = newPoints[j]
spline.bezier_points[j].co = newPoint[0]
spline.bezier_points[j].handle_left = newPoint[1]
spline.bezier_points[j].handle_right = newPoint[2]
spline.bezier_points[j].handle_right_type = 'FREE'
return newCurveData
def updateCurve(self):
curveData = self.curve.data
#Remove existing shape keys first
if(curveData.shape_keys != None):
keyblocks = reversed(curveData.shape_keys.key_blocks)
for sk in keyblocks:
self.curve.shape_key_remove(sk)
self.curve.data = self.getNewCurveData()
bpy.data.curves.remove(curveData)
def main(targetObj, shapekeyObjs, removeOriginal, space, matchParts, \
matchCriteria, alignBy, alignValues):
target = Path(targetObj)
shapekeys = [Path(c) for c in shapekeyObjs]
existingKeys = getExistingShapeKeyPaths(target)
shapekeys = existingKeys + shapekeys
userSel = [target] + shapekeys
for path in userSel:
alignPath(path, matchParts, matchCriteria, alignBy, alignValues)
addMissingSegs(userSel, byPart = (matchParts != "-None-"))
bIdxs = set()
for path in userSel:
bIdxs = bIdxs.union(path.getPartBoundaryIdxs())
for path in userSel:
path.updatePartsList(sorted(list(bIdxs)), byPart = False)
#All will have the same part count by now
allToClose = [all(path.parts[j].isClosed for path in userSel)
for j in range(0, len(userSel[0].parts))]
#All paths will have the same no of splines with the same no of bezier points
for path in userSel:
for j, part in enumerate(path.parts):
part.toClose = allToClose[j]
target.updateCurve()
if(len(existingKeys) == 0):
target.curve.shape_key_add(name = 'Basis')
addShapeKeys(target.curve, shapekeys, space)
if(removeOriginal):
for path in userSel:
if(path.curve != target.curve):
safeRemoveObj(path.curve)
def getSplineSegs(spline):
p = spline.bezier_points
segs = [Segment(p[i-1].co, p[i-1].handle_right, p[i].handle_left, p[i].co) \
for i in range(1, len(p))]
if(spline.use_cyclic_u):
segs.append(Segment(p[-1].co, p[-1].handle_right, p[0].handle_left, p[0].co))
return segs
def subdivideSeg(origSeg, noSegs):
if(noSegs < 2):
return [origSeg]
segs = []
oldT = 0
segLen = origSeg.length / noSegs
for i in range(0, noSegs-1):
t = float(i+1) / noSegs
seg = origSeg.partialSeg(oldT, t)
segs.append(seg)
oldT = t
seg = origSeg.partialSeg(oldT, 1)
segs.append(seg)
return segs
def getSubdivCntPerSeg(part, toAddCnt):
class SegWrapper:
def __init__(self, idx, seg):
self.idx = idx
self.seg = seg
self.length = seg.length
class PartWrapper:
def __init__(self, part):
self.segList = []
self.segCnt = len(part.getSegs())
for idx, seg in enumerate(part.getSegs()):
self.segList.append(SegWrapper(idx, seg))
partWrapper = PartWrapper(part)
partLen = part.length
avgLen = partLen / (partWrapper.segCnt + toAddCnt)
segsToDivide = [sr for sr in partWrapper.segList if sr.seg.length >= avgLen]
segToDivideCnt = len(segsToDivide)
avgLen = sum(sr.seg.length for sr in segsToDivide) / (segToDivideCnt + toAddCnt)
segsToDivide = sorted(segsToDivide, key=lambda x: x.length, reverse = True)
cnts = [0] * partWrapper.segCnt
addedCnt = 0
for i in range(0, segToDivideCnt):
segLen = segsToDivide[i].seg.length
divideCnt = int(round(segLen/avgLen)) - 1
if(divideCnt == 0):
break
if((addedCnt + divideCnt) >= toAddCnt):
cnts[segsToDivide[i].idx] = toAddCnt - addedCnt
addedCnt = toAddCnt
break
cnts[segsToDivide[i].idx] = divideCnt
addedCnt += divideCnt
#TODO: Verify if needed
while(toAddCnt > addedCnt):
for i in range(0, segToDivideCnt):
cnts[segsToDivide[i].idx] += 1
addedCnt += 1
if(toAddCnt == addedCnt):
break
return cnts
#Just distribute equally; this is likely a rare condition. So why complicate?
def distributeCnt(maxSegCntsByPart, startIdx, extraCnt):
added = 0
elemCnt = len(maxSegCntsByPart) - startIdx
cntPerElem = floor(extraCnt / elemCnt)
remainder = extraCnt % elemCnt
for i in range(startIdx, len(maxSegCntsByPart)):
maxSegCntsByPart[i] += cntPerElem
if(i < remainder + startIdx):
maxSegCntsByPart[i] += 1
#Make all the paths to have the maximum number of segments in the set
#TODO: Refactor
def addMissingSegs(selPaths, byPart):
maxSegCntsByPart = []
maxSegCnt = 0
resSegCnt = []
sortedPaths = sorted(selPaths, key = lambda c: -len(c.parts))
for i, path in enumerate(sortedPaths):
if(byPart == False):
segCnt = path.getPartView().getSegCnt()
if(segCnt > maxSegCnt):
maxSegCnt = segCnt
else:
resSegCnt.append([])
for j, part in enumerate(path.parts):
partSegCnt = part.getSegCnt()
resSegCnt[i].append(partSegCnt)
#First path
if(j == len(maxSegCntsByPart)):
maxSegCntsByPart.append(partSegCnt)
#last part of this path, but other paths in set have more parts
elif((j == len(path.parts) - 1) and
len(maxSegCntsByPart) > len(path.parts)):
remainingSegs = sum(maxSegCntsByPart[j:])
if(partSegCnt <= remainingSegs):
resSegCnt[i][j] = remainingSegs
else:
#This part has more segs than the sum of the remaining part segs
#So distribute the extra count
distributeCnt(maxSegCntsByPart, j, (partSegCnt - remainingSegs))
#Also, adjust the seg count of the last part of the previous
#segments that had fewer than max number of parts
for k in range(0, i):
if(len(sortedPaths[k].parts) < len(maxSegCntsByPart)):
totalSegs = sum(maxSegCntsByPart)
existingSegs = sum(maxSegCntsByPart[:len(sortedPaths[k].parts)-1])
resSegCnt[k][-1] = totalSegs - existingSegs
elif(partSegCnt > maxSegCntsByPart[j]):
maxSegCntsByPart[j] = partSegCnt
for i, path in enumerate(sortedPaths):
if(byPart == False):
partView = path.getPartView()
segCnt = partView.getSegCnt()
diff = maxSegCnt - segCnt
if(diff > 0):
cnts = getSubdivCntPerSeg(partView, diff)
cumulSegIdx = 0
for j in range(0, len(path.parts)):
part = path.parts[j]
newSegs = []
for k, seg in enumerate(part.getSegs()):
numSubdivs = cnts[cumulSegIdx] + 1
newSegs += subdivideSeg(seg, numSubdivs)
cumulSegIdx += 1
path.parts[j] = Part(path, newSegs, part.isClosed)
else:
for j in range(0, len(path.parts)):
part = path.parts[j]
newSegs = []
partSegCnt = part.getSegCnt()
#TODO: Adding everything in the last part?
if(j == (len(path.parts)-1) and
len(maxSegCntsByPart) > len(path.parts)):
diff = resSegCnt[i][j] - partSegCnt
else:
diff = maxSegCntsByPart[j] - partSegCnt
if(diff > 0):
cnts = getSubdivCntPerSeg(part, diff)
for k, seg in enumerate(part.getSegs()):
seg = part.getSeg(k)
subdivCnt = cnts[k] + 1 #1 for the existing one
newSegs += subdivideSeg(seg, subdivCnt)
#isClosed won't be used, but let's update anyway
path.parts[j] = Part(path, newSegs, part.isClosed)
#TODO: Simplify (Not very readable)
def alignPath(path, matchParts, matchCriteria, alignBy, alignValues):
parts = path.parts[:]
if(matchParts == 'custom'):
fnMap = {'vCnt' : lambda part: -1 * part.getSegCnt(), \
'bbArea': lambda part: -1 * part.bboxSurfaceArea(worldSpace = True), \
'bbHeight' : lambda part: -1 * part.getBBHeight(worldSpace = True), \
'bbWidth' : lambda part: -1 * part.getBBWidth(worldSpace = True), \
'bbDepth' : lambda part: -1 * part.getBBDepth(worldSpace = True)
}
matchPartCmpFns = []
for criterion in matchCriteria:
fn = fnMap.get(criterion)
if(fn == None):
minmax = criterion[:3] == 'max' #0 if min; 1 if max
axisIdx = ord(criterion[3:]) - ord('X')
fn = eval('lambda part: part.getBBox(worldSpace = True)[' + \
str(minmax) + '][' + str(axisIdx) + ']')
matchPartCmpFns.append(fn)
def comparer(left, right):
for fn in matchPartCmpFns:
a = fn(left)
b = fn(right)
if(floatCmpWithMargin(a, b)):
continue
else:
return (a > b) - ( a < b) #No cmp in python3
return 0
parts = sorted(parts, key = cmp_to_key(comparer))
alignCmpFn = None
if(alignBy == 'vertCo'):
def evalCmp(criteria, pt1, pt2):
if(len(criteria) == 0):
return True
minmax = criteria[0][0]
axisIdx = criteria[0][1]
val1 = pt1[axisIdx]
val2 = pt2[axisIdx]
if(floatCmpWithMargin(val1, val2)):
criteria = criteria[:]
criteria.pop(0)
return evalCmp(criteria, pt1, pt2)
return val1 < val2 if minmax == 'min' else val1 > val2
alignCri = [[a[:3], ord(a[3:]) - ord('X')] for a in alignValues]
alignCmpFn = lambda pt1, pt2, curve: (evalCmp(alignCri, \
curve.matrix_world @ pt1, curve.matrix_world @ pt2))
startPt = None
startIdx = None
for i in range(0, len(parts)):
#Only truly closed parts
if(alignCmpFn != None and parts[i].isClosed):
for j in range(0, parts[i].getSegCnt()):
seg = parts[i].getSeg(j)
if(j == 0 or alignCmpFn(seg.start, startPt, path.curve)):
startPt = seg.start
startIdx = j
path.parts[i]= Part(path, parts[i].getSegsCopy(startIdx, None) + \
parts[i].getSegsCopy(None, startIdx), parts[i].isClosed)
else:
path.parts[i] = parts[i]
#TODO: Other shape key attributes like interpolation...?
def getExistingShapeKeyPaths(path):
obj = path.curve
paths = []
if(obj.data.shape_keys != None):
keyblocks = obj.data.shape_keys.key_blocks[:]
for key in keyblocks:
datacopy = obj.data.copy()
i = 0
for spline in datacopy.splines:
for pt in spline.bezier_points:
pt.co = key.data[i].co
pt.handle_left = key.data[i].handle_left
pt.handle_right = key.data[i].handle_right
i += 1
paths.append(Path(obj, datacopy, key.name))
return paths
def addShapeKeys(curve, paths, space):
for path in paths:
key = curve.shape_key_add(name = path.name)
pts = [pt for pset in path.getBezierPtsBySpline() for pt in pset]
for i, pt in enumerate(pts):
if(space == 'worldspace'):
pt = [curve.matrix_world.inverted() @ (path.curve.matrix_world @ p) for p in pt]
key.data[i].co = pt[0]
key.data[i].handle_left = pt[1]
key.data[i].handle_right = pt[2]
#TODO: Remove try
def safeRemoveObj(obj):
try:
collections = obj.users_collection
for c in collections:
c.objects.unlink(obj)
if(obj.name in bpy.context.scene.collection.objects):
bpy.context.scene.collection.objects.unlink(obj)
if(obj.data.users == 1):
if(obj.type == 'CURVE'):
bpy.data.curves.remove(obj.data) #This also removes object?
elif(obj.type == 'MESH'):
bpy.data.meshes.remove(obj.data)
bpy.data.objects.remove(obj)
except:
pass
def markVertHandler(self, context):
if(self.markVertex):
bpy.ops.wm.mark_vertex()
#################### UI and Registration ####################
class AssignShapeKeysOp(Operator):
bl_idname = "object.assign_shape_keys"
bl_label = "Assign Shape Keys"
bl_options = {'REGISTER', 'UNDO'}
def execute(self, context):
params = context.window_manager.AssignShapeKeyParams
removeOriginal = params.removeOriginal
space = params.space
matchParts = params.matchParts
matchCri1 = params.matchCri1
matchCri2 = params.matchCri2
matchCri3 = params.matchCri3
alignBy = params.alignCos
alignVal1 = params.alignVal1
alignVal2 = params.alignVal2
alignVal3 = params.alignVal3
targetObj = bpy.context.active_object
shapekeyObjs = [obj for obj in bpy.context.selected_objects if isBezier(obj) \
and obj != targetObj]
if(targetObj != None and isBezier(targetObj) and len(shapekeyObjs) > 0):
main(targetObj, shapekeyObjs, removeOriginal, space, \
matchParts, [matchCri1, matchCri2, matchCri3], \
alignBy, [alignVal1, alignVal2, alignVal3])
return {'FINISHED'}
class MarkerController:
drawHandlerRef = None
defPointSize = 6
ptColor = (0, .8, .8, 1)
def createSMMap(self, context):
objs = context.selected_objects
smMap = {}
for curve in objs:
if(not isBezier(curve)):
continue
smMap[curve.name] = {}
mw = curve.matrix_world
for splineIdx, spline in enumerate(curve.data.splines):
if(not spline.use_cyclic_u):
continue
#initialize to the curr start vert co and idx
smMap[curve.name][splineIdx] = \
[mw @ curve.data.splines[splineIdx].bezier_points[0].co, 0]
for pt in spline.bezier_points:
pt.select_control_point = False
if(len(smMap[curve.name]) == 0):
del smMap[curve.name]
return smMap
def createBatch(self, context):
positions = [s[0] for cn in self.smMap.values() for s in cn.values()]
colors = [MarkerController.ptColor for i in range(0, len(positions))]
self.batch = batch_for_shader(self.shader, \
"POINTS", {"pos": positions, "color": colors})
if context.area:
context.area.tag_redraw()
def drawHandler(self):
gpu.state.point_size_set(MarkerController.defPointSize)
self.batch.draw(self.shader)
def removeMarkers(self, context):
if(MarkerController.drawHandlerRef != None):
bpy.types.SpaceView3D.draw_handler_remove(MarkerController.drawHandlerRef, \
"WINDOW")
if(context.area and hasattr(context.space_data, 'region_3d')):
context.area.tag_redraw()
MarkerController.drawHandlerRef = None
self.deselectAll()
def __init__(self, context):
self.smMap = self.createSMMap(context)
self.shader = gpu.shader.from_builtin('3D_FLAT_COLOR')
# self.shader.bind()
MarkerController.drawHandlerRef = \
bpy.types.SpaceView3D.draw_handler_add(self.drawHandler, \
(), "WINDOW", "POST_VIEW")
self.createBatch(context)
def saveStartVerts(self):
for curveName in self.smMap.keys():
curve = bpy.data.objects[curveName]
splines = curve.data.splines
spMap = self.smMap[curveName]
for splineIdx in spMap.keys():
markerInfo = spMap[splineIdx]
if(markerInfo[1] != 0):
pts = splines[splineIdx].bezier_points
loc, idx = markerInfo[0], markerInfo[1]
cnt = len(pts)
ptCopy = [[p.co.copy(), p.handle_right.copy(), \
p.handle_left.copy(), p.handle_right_type, \
p.handle_left_type] for p in pts]
for i, pt in enumerate(pts):
srcIdx = (idx + i) % cnt
p = ptCopy[srcIdx]
#Must set the types first
pt.handle_right_type = p[3]
pt.handle_left_type = p[4]
pt.co = p[0]
pt.handle_right = p[1]
pt.handle_left = p[2]
def updateSMMap(self):
for curveName in self.smMap.keys():
curve = bpy.data.objects[curveName]
spMap = self.smMap[curveName]
mw = curve.matrix_world
for splineIdx in spMap.keys():
markerInfo = spMap[splineIdx]
loc, idx = markerInfo[0], markerInfo[1]
pts = curve.data.splines[splineIdx].bezier_points
selIdxs = [x for x in range(0, len(pts)) \
if pts[x].select_control_point == True]
selIdx = selIdxs[0] if(len(selIdxs) > 0 ) else idx
co = mw @ pts[selIdx].co
self.smMap[curveName][splineIdx] = [co, selIdx]
def deselectAll(self):
for curveName in self.smMap.keys():
curve = bpy.data.objects[curveName]
for spline in curve.data.splines:
for pt in spline.bezier_points:
pt.select_control_point = False
def getSpaces3D(context):
areas3d = [area for area in context.window.screen.areas \
if area.type == 'VIEW_3D']
return [s for a in areas3d for s in a.spaces if s.type == 'VIEW_3D']
def hideHandles(context):
states = []
spaces = MarkerController.getSpaces3D(context)
for s in spaces:
if(hasattr(s.overlay, 'show_curve_handles')):
states.append(s.overlay.show_curve_handles)
s.overlay.show_curve_handles = False
elif(hasattr(s.overlay, 'display_handle')): # 2.90
states.append(s.overlay.display_handle)
s.overlay.display_handle = 'NONE'
return states
def resetShowHandleState(context, handleStates):
spaces = MarkerController.getSpaces3D(context)
for i, s in enumerate(spaces):
if(hasattr(s.overlay, 'show_curve_handles')):
s.overlay.show_curve_handles = handleStates[i]
elif(hasattr(s.overlay, 'display_handle')): # 2.90
s.overlay.display_handle = handleStates[i]
class ModalMarkSegStartOp(Operator):
bl_description = "Mark Vertex"
bl_idname = "wm.mark_vertex"
bl_label = "Mark Start Vertex"
def cleanup(self, context):
wm = context.window_manager
wm.event_timer_remove(self._timer)
self.markerState.removeMarkers(context)
MarkerController.resetShowHandleState(context, self.handleStates)
context.window_manager.AssignShapeKeyParams.markVertex = False
def modal (self, context, event):
params = context.window_manager.AssignShapeKeyParams
if(context.mode == 'OBJECT' or event.type == "ESC" or\
not context.window_manager.AssignShapeKeyParams.markVertex):
self.cleanup(context)
return {'CANCELLED'}
elif(event.type == "RET"):
self.markerState.saveStartVerts()
self.cleanup(context)
return {'FINISHED'}
if(event.type == 'TIMER'):
self.markerState.updateSMMap()
self.markerState.createBatch(context)
return {"PASS_THROUGH"}
def execute(self, context):
#TODO: Why such small step?
self._timer = context.window_manager.event_timer_add(time_step = 0.0001, \
window = context.window)
context.window_manager.modal_handler_add(self)
self.markerState = MarkerController(context)
#Hide so that users don't accidentally select handles instead of points
self.handleStates = MarkerController.hideHandles(context)
return {"RUNNING_MODAL"}
class AssignShapeKeyParams(bpy.types.PropertyGroup):
removeOriginal : BoolProperty(name = "Remove Shape Key Objects", \
description = "Remove shape key objects after assigning to target", \
default = True)
space : EnumProperty(name = "Space", \
items = [('worldspace', 'World Space', 'worldspace'),
('localspace', 'Local Space', 'localspace')], \
description = 'Space that shape keys are evluated in')
alignCos : EnumProperty(name="Vertex Alignment", items = \