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blenderbezierutils.py
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#
#
# Blender add-on with tools to draw and edit Bezier curves along with other utility ops
#
# Supported Blender Version: 2.8x
#
# Copyright (C) 2019 Shrinivas Kulkarni
# License: GPL (https://github.com/Shriinivas/blenderbezierutils/blob/master/LICENSE)
#
import os, bpy, bmesh, bgl, blf, gpu
from bpy.props import BoolProperty, IntProperty, EnumProperty, \
FloatProperty, StringProperty, CollectionProperty, FloatVectorProperty, PointerProperty
from bpy.types import Panel, Operator, WorkSpaceTool, AddonPreferences, Menu
from mathutils import Vector, Matrix, geometry, kdtree
from math import e, pi, log, sin, cos, tan, radians, degrees, sqrt, asin, acos, atan, floor, \
ceil, pow, exp
from bpy_extras.view3d_utils import region_2d_to_vector_3d, region_2d_to_location_3d, \
region_2d_to_origin_3d
from bpy_extras.view3d_utils import location_3d_to_region_2d
from bpy_extras.object_utils import world_to_camera_view
from gpu_extras.batch import batch_for_shader
import random, time, math
from bpy.app.handlers import persistent
from xml.dom import minidom
from shutil import copyfile
bl_info = {
"name": "Bezier Utilities",
"author": "Shrinivas Kulkarni",
"version": (0, 9, 95),
"location": "Properties > Active Tool and Workspace Settings > Bezier Utilities",
"description": "Collection of Bezier curve utility ops",
"category": "Object",
"wiki_url": "https://github.com/Shriinivas/blenderbezierutils/blob/master/README.md",
"blender": (2, 80, 0),
}
DEF_ERR_MARGIN = 0.0001
# Markers for invalid data
LARGE_NO = 9e+9 # Both float and int
LARGE_VECT = Vector((LARGE_NO, LARGE_NO, LARGE_NO))
INVAL = '~'
###################### Common functions ######################
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)))
def isBezier(bObj):
return bObj.type == 'CURVE' and len(bObj.data.splines) > 0 \
and bObj.data.splines[0].type == 'BEZIER' and \
len(bObj.data.splines[0].bezier_points) > 0
def safeRemoveObj(obj):
try:
collections = obj.users_collection
for c in collections:
c.objects.unlink(obj)
if(obj.data.users == 1):
if(obj.type == 'MESH'):
bpy.data.meshes.remove(obj.data)
elif(obj.type == 'CURVE'):
bpy.data.curves.remove(obj.data)
#else? TODO
bpy.data.objects.remove(obj)
except:
pass
#TODO combine with copyObjAttr
def copyBezierPt(src, target, freeHandles = None, srcMw = Matrix(), invDestMW = Matrix()):
target.handle_left_type = 'FREE'
target.handle_right_type = 'FREE'
target.co = invDestMW @ (srcMw @ src.co)
target.handle_left = invDestMW @ (srcMw @ src.handle_left)
target.handle_right = invDestMW @ (srcMw @ src.handle_right)
if(freeHandles == None or freeHandles[0] == False):
target.handle_left_type = src.handle_left_type
if(freeHandles == None or freeHandles[1] == False):
target.handle_right_type = src.handle_right_type
def createSplineForSeg(curveData, bezierPts):
spline = curveData.splines.new('BEZIER')
spline.bezier_points.add(len(bezierPts)-1)
spline.use_cyclic_u = False
for i, pt in enumerate(bezierPts):
if(i == 0): freeHandles = [False, True]
elif(i == len(bezierPts) - 1): freeHandles = [True, False]
else: freeHandles = None
copyBezierPt(pt, spline.bezier_points[i], freeHandles = freeHandles)
return spline
def createSpline(curveData, srcSpline, excludePtIdxs = {}):
spline = curveData.splines.new('BEZIER')
spline.bezier_points.add(len(srcSpline.bezier_points) - len(excludePtIdxs) - 1)
spline.use_cyclic_u = srcSpline.use_cyclic_u
ptIdx = 0
for i in range(0, len(srcSpline.bezier_points)):
if(i not in excludePtIdxs):
copyBezierPt(srcSpline.bezier_points[i], \
spline.bezier_points[ptIdx], freeHandles = None)
ptIdx += 1
return spline
def createSkeletalCurve(obj, collections):
objCopy = obj.copy()
objCopy.name = obj.name
dataCopy = obj.data.copy()
dataCopy.splines.clear()
objCopy.data = dataCopy
for coll in collections:
coll.objects.link(objCopy)
return objCopy
def createObjFromPts(curvePts, dimensions = '3D', collection = None, \
closed = False, calcHdlTypes = True):
data = bpy.data.curves.new('BezierCurve', 'CURVE')
data.dimensions = dimensions
obj = bpy.data.objects.new('BezierCurve', data)
# ~ collection = context.collection
if(collection == None):
collection = bpy.context.scene.collection
collection.objects.link(obj)
# ~ obj.location = context.scene.cursor.location
# ~ depsgraph = context.evaluated_depsgraph_get()
# ~ depsgraph.update()
# ~ invM = obj.matrix_world.inverted_safe()
spline = data.splines.new('BEZIER')
spline.use_cyclic_u = False
if(vectCmpWithMargin(curvePts[0][1], curvePts[-1][1])):
curvePts[0][0] = curvePts[-1][0]
spline.use_cyclic_u = True
curvePts.pop()
if(closed): spline.use_cyclic_u = True
spline.bezier_points.add(len(curvePts) - 1)
prevPt = None
for i, pt in enumerate(curvePts):
currPt = spline.bezier_points[i]
currPt.co = pt[1]
currPt.handle_right = pt[2]
if(not calcHdlTypes and len(pt) > 3):
currPt.handle_right_type = pt[3]
currPt.handle_left_type = pt[4]
elif(prevPt != None and prevPt.handle_right == prevPt.co \
and pt[0] == pt[1] and currPt.co != prevPt.co): # straight line
if(prevPt.handle_left_type != 'VECTOR'):
prevPt.handle_left_type = 'FREE'
prevPt.handle_right_type = 'VECTOR'
currPt.handle_right_type = 'FREE'
currPt.handle_left_type = 'VECTOR'
else:
currPt.handle_left_type = 'FREE'
currPt.handle_right_type = 'FREE'
currPt.handle_left = pt[0]
ldiffV = (pt[1] - pt[0])
rdiffV = (pt[2] - pt[1])
if(vectCmpWithMargin(ldiffV, rdiffV) and \
not floatCmpWithMargin(ldiffV.length, 0)):
currPt.handle_left_type = 'ALIGNED'
currPt.handle_right_type = 'ALIGNED'
prevPt = currPt
bpts = spline.bezier_points
if(spline.use_cyclic_u and vectCmpWithMargin(bpts[-1].handle_right, bpts[-1].co) \
and vectCmpWithMargin(bpts[0].handle_left, bpts[0].co)):
if(bpts[-1].handle_left_type != 'VECTOR'):
bpts[-1].handle_left_type = 'FREE'
bpts[-1].handle_right_type = 'VECTOR'
if(bpts[0].handle_right_type != 'VECTOR'):
bpts[0].handle_right_type = 'FREE'
bpts[0].handle_left_type = 'VECTOR'
return obj
def removeShapeKeys(obj):
if(obj.data.shape_keys == None):
return
keyblocks = reversed(obj.data.shape_keys.key_blocks)
for sk in keyblocks:
obj.shape_key_remove(sk)
def getShapeKeyInfo(obj):
keyData = []
keyNames = []
if(obj.data.shape_keys != None):
keyblocks = obj.data.shape_keys.key_blocks
for key in keyblocks:
keyData.append([[d.handle_left.copy(), d.co.copy(), d.handle_right.copy()] \
for d in key.data])
keyNames.append(key.name)
return keyNames, keyData
def updateShapeKeyData(obj, keyData, keyNames, startIdx, cnt = None, add = False):
if(obj.data.shape_keys == None and not add):
return
currIdx = obj.active_shape_key_index
if(not add): removeShapeKeys(obj)
if(cnt == None): cnt = len(keyData[0])
for i, name in enumerate(keyNames):
key = obj.shape_key_add(name = name)
for j in range(0, cnt):
keyIdx = j + startIdx
key.data[j].handle_left = keyData[i][keyIdx][0].copy()
key.data[j].co = keyData[i][keyIdx][1].copy()
key.data[j].handle_right = keyData[i][keyIdx][2].copy()
obj.active_shape_key_index = currIdx
#TODO: Fix this hack if possible
def copyObjAttr(src, dest, invDestMW = Matrix(), mw = Matrix()):
for att in dir(src):
try:
if(att not in ['co', 'handle_left', 'handle_right', \
'handle_left_type', 'handle_right_type']):
setattr(dest, att, getattr(src, att))
except Exception as e:
pass
try:
lt = src.handle_left_type
rt = src.handle_right_type
dest.handle_left_type = 'FREE'
dest.handle_right_type = 'FREE'
dest.co = invDestMW @ (mw @ src.co)
dest.handle_left = invDestMW @ (mw @ src.handle_left)
dest.handle_right = invDestMW @ (mw @ src.handle_right)
dest.handle_left_type = lt
dest.handle_right_type = rt
pass
except Exception as e:
pass
def getLastSegIdx(obj, splineIdx):
spline = obj.data.splines[splineIdx]
ptCnt = len(spline.bezier_points)
return ptCnt - 1 if(spline.use_cyclic_u) else ptCnt - 2
def addLastSeg(spline):
if(spline.use_cyclic_u):
lt0 = spline.bezier_points[0].handle_left_type
rt0 = spline.bezier_points[0].handle_right_type
pt = spline.bezier_points[0]
pt.handle_left_type = 'FREE'
pt.handle_right_type = 'FREE'
spline.use_cyclic_u = False
spline.bezier_points.add(1)
copyObjAttr(spline.bezier_points[0], spline.bezier_points[-1])
spline.bezier_points[0].handle_left_type = lt0
spline.bezier_points[-1].handle_right_type = rt0
def moveSplineStart(obj, splineIdx, idx):
pts = obj.data.splines[splineIdx].bezier_points
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]
pt.handle_left_type = 'FREE'
pt.handle_right_type = 'FREE'
pt.co = p[0]
pt.handle_right = p[1]
pt.handle_left = p[2]
pt.handle_right_type = p[3]
pt.handle_left_type = p[4]
def joinCurves(curves):
obj = curves[0]
invMW = obj.matrix_world.inverted_safe()
for curve in curves[1:]:
mw = curve.matrix_world
for spline in curve.data.splines:
newSpline = obj.data.splines.new('BEZIER')
copyObjAttr(spline, newSpline)
newSpline.bezier_points.add(len(spline.bezier_points)-1)
for i, pt in enumerate(spline.bezier_points):
copyObjAttr(pt, newSpline.bezier_points[i], \
invDestMW = invMW, mw = mw)
safeRemoveObj(curve)
return obj
def getObjBBoxCenter(obj):
bbox = obj.bound_box
return obj.matrix_world @ Vector(((bbox[0][0] + bbox[4][0]) / 2, \
(bbox[0][1] + bbox[3][1]) / 2, (bbox[0][2] + bbox[1][2]) / 2))
# Only mesh and Bezier curve
def shiftOrigin(obj, origin):
oLoc = obj.location.copy()
mw = obj.matrix_world
invMw = mw.inverted_safe()
if(obj.type == 'MESH'):
for vert in obj.data.vertices:
vert.co += invMw @ oLoc - invMw @ origin
elif(obj.type == 'CURVE'):
for s in obj.data.splines:
bpts = s.bezier_points
for bpt in bpts:
lht = bpt.handle_left_type
rht = bpt.handle_right_type
bpt.handle_left_type = 'FREE'
bpt.handle_right_type = 'FREE'
bpt.co += invMw @ oLoc - invMw @ origin
bpt.handle_left += invMw @ oLoc - invMw @ origin
bpt.handle_right += invMw @ oLoc - invMw @ origin
bpt.handle_left_type = lht
bpt.handle_right_type = rht
obj.location = origin
# Only mesh and Bezier curve; depsgraph not updated
def shiftMatrixWorld(obj, mw):
invMw = mw.inverted_safe()
omw = obj.matrix_world
if(obj.type == 'MESH'):
for vert in obj.data.vertices:
vert.co = invMw @ (omw @ vert.co)
elif(obj.type == 'CURVE'):
for s in obj.data.splines:
bpts = s.bezier_points
for bpt in bpts:
lht = bpt.handle_left_type
rht = bpt.handle_right_type
bpt.handle_left_type = 'FREE'
bpt.handle_right_type = 'FREE'
bpt.co = invMw @ (omw @ bpt.co)
bpt.handle_left = invMw @ (omw @ bpt.handle_left)
bpt.handle_right = invMw @ (omw @ bpt.handle_right)
bpt.handle_left_type = lht
bpt.handle_right_type = rht
obj.matrix_world = mw
# Also shifts origin; depsgraph not updated
def alignToNormal(curve):
depsgraph = bpy.context.evaluated_depsgraph_get()
depsgraph.update()
mw = curve.matrix_world.copy()
normals = []
for spline in curve.data.splines:
bpts = spline.bezier_points
bptCnt = len(bpts)
if(bptCnt > 2):
normals.append(geometry.normal(mw @ bpts[i].co for i in range(bptCnt)))
cnt = len(normals)
if(cnt > 0):
normal = Vector([sum(normals[i][j] for i in range(cnt)) \
for j in range(3)]) / cnt
quatMat = normal.to_track_quat('Z', 'X').to_matrix().to_4x4()
shiftMatrixWorld(curve, quatMat)
def copyProperties(srcObj, destCurve):
if(srcObj == None or destCurve == None):
return
destData = destCurve.data
srcData = srcObj.data
# If object is bezier curve copy curve properties and material
if(isBezier(srcObj)):
# Copying just a few attributes
destData.dimensions = srcData.dimensions
destData.resolution_u = srcData.resolution_u
destData.render_resolution_u = srcData.render_resolution_u
destData.fill_mode = srcData.fill_mode
destData.use_fill_deform = srcData.use_fill_deform
destData.use_radius = srcData.use_radius
destData.use_stretch = srcData.use_stretch
destData.use_deform_bounds = srcData.use_deform_bounds
destData.twist_smooth = srcData.twist_smooth
destData.twist_mode = srcData.twist_mode
destData.offset = srcData.offset
destData.extrude = srcData.extrude
destData.bevel_depth = srcData.bevel_depth
destData.bevel_resolution = srcData.bevel_resolution
destData.bevel_object = srcData.bevel_object
destData.taper_object = srcData.taper_object
destData.use_fill_caps = srcData.use_fill_caps
if(hasattr(srcData, 'materials') and len(srcData.materials) > 0):
mat = srcData.materials[srcObj.active_material_index]
if(len(destData.materials) == 0 or mat.name not in destData.materials):
destData.materials.append(mat)
activeIdx = -1 #Last
else:
activeIdx = destData.materials.find(mat.name)
destCurve.active_material_index = activeIdx
def reverseCurve(curve):
cp = curve.data.copy()
curve.data.splines.clear()
for s in reversed(cp.splines):
ns = curve.data.splines.new('BEZIER')
copyObjAttr(s, ns)
ns.bezier_points.add(len(s.bezier_points) - 1)
for i, p in enumerate(reversed(s.bezier_points)):
copyObjAttr(p, ns.bezier_points[i])
ns.bezier_points[i].handle_left_type = 'FREE'
ns.bezier_points[i].handle_right_type = 'FREE'
ns.bezier_points[i].handle_left = p.handle_right
ns.bezier_points[i].handle_right = p.handle_left
ns.bezier_points[i].handle_left_type = p.handle_right_type
ns.bezier_points[i].handle_right_type = p.handle_left_type
bpy.data.curves.remove(cp)
# Insert spline at location insertIdx, duplicated from existing spline at
# location srcSplineIdx and remove points with indices in removePtIdxs from new spline
def insertSpline(obj, srcSplineIdx, insertIdx, removePtIdxs):
srcSpline = obj.data.splines[srcSplineIdx]
# Appended at end
createSpline(obj.data, srcSpline, removePtIdxs)
splineCnt = len(obj.data.splines)
nextIdx = insertIdx
for idx in range(nextIdx, splineCnt - 1):
srcSpline = obj.data.splines[nextIdx]
createSpline(obj.data, srcSpline)
obj.data.splines.remove(srcSpline)
def removeBezierPts(obj, splineIdx, removePtIdxs):
oldSpline = obj.data.splines[splineIdx]
bpts = oldSpline.bezier_points
if(min(removePtIdxs) >= len(bpts)):
return
if(len(set(range(len(bpts))) - set(removePtIdxs)) == 0) :
obj.data.splines.remove(oldSpline)
if(len(obj.data.splines) == 0):
safeRemoveObj(obj)
return
insertSpline(obj, splineIdx, splineIdx, removePtIdxs)
obj.data.splines.remove(obj.data.splines[splineIdx + 1])
# Returns a tuple with first value indicating change in spline index (-1, 0, 1)
# and second indicating shift in seg index (negative) due to removal
def removeBezierSeg(obj, splineIdx, segIdx):
nextIdx = getAdjIdx(obj, splineIdx, segIdx)
if(nextIdx == None): return
spline = obj.data.splines[splineIdx]
bpts = spline.bezier_points
ptCnt = len(bpts)
lastSegIdx = getLastSegIdx(obj, splineIdx)
splineIdxIncr = 0
segIdxIncr = 0
if(ptCnt <= 2):
removeBezierPts(obj, splineIdx, {segIdx, nextIdx})
# Spline removed by above call
splineIdxIncr = -1
else:
bpt = obj.data.splines[splineIdx].bezier_points[segIdx]
bpt.handle_right_type = 'FREE'
bpt.handle_left_type = 'FREE'
nextIdx = getAdjIdx(obj, splineIdx, segIdx)
bpt = obj.data.splines[splineIdx].bezier_points[nextIdx]
bpt.handle_right_type = 'FREE'
bpt.handle_left_type = 'FREE'
if(spline.use_cyclic_u):
spline.use_cyclic_u = False
if(segIdx != lastSegIdx):
moveSplineStart(obj, splineIdx, getAdjIdx(obj, splineIdx, segIdx))
segIdxIncr = - (segIdx + 1)
else:
if(segIdx == lastSegIdx):
removeBezierPts(obj, splineIdx, {lastSegIdx + 1})
elif(segIdx == 0):
removeBezierPts(obj, splineIdx, {0})
segIdxIncr = -1
else:
insertSpline(obj, splineIdx, splineIdx, set(range(segIdx + 1, ptCnt)))
removeBezierPts(obj, splineIdx + 1, range(segIdx + 1))
splineIdxIncr = 1
segIdxIncr = - (segIdx + 1)
return splineIdxIncr, segIdxIncr
def insertBezierPts(obj, splineIdx, startIdx, cos, handleType, margin = DEF_ERR_MARGIN):
spline = obj.data.splines[splineIdx]
bpts = spline.bezier_points
nextIdx = getAdjIdx(obj, splineIdx, startIdx)
firstPt = bpts[startIdx]
nextPt = bpts[nextIdx]
if(firstPt.handle_right_type == 'AUTO'):
firstPt.handle_left_type = 'ALIGNED'
firstPt.handle_right_type = 'ALIGNED'
if(nextPt.handle_left_type == 'AUTO'):
nextPt.handle_left_type = 'ALIGNED'
nextPt.handle_right_type = 'ALIGNED'
fhdl = firstPt.handle_right_type
nhdl = nextPt.handle_left_type
firstPt.handle_right_type = 'FREE'
nextPt.handle_left_type = 'FREE'
ptCnt = len(bpts)
addCnt = len(cos)
bpts.add(addCnt)
nextIdx = startIdx + 1
for i in range(0, (ptCnt - nextIdx)):
idx = ptCnt - i - 1# reversed
offsetIdx = idx + addCnt
copyObjAttr(bpts[idx], bpts[offsetIdx])
endIdx = getAdjIdx(obj, splineIdx, nextIdx, addCnt)
firstPt = bpts[startIdx]
nextPt = bpts[endIdx]
prevPt = firstPt
for i, pt in enumerate(bpts[nextIdx:nextIdx + addCnt]):
pt.handle_left_type = 'FREE'
pt.handle_right_type = 'FREE'
co = cos[i]
seg = [prevPt.co, prevPt.handle_right, nextPt.handle_left, nextPt.co]
t = getTForPt(seg, co, margin)
ctrlPts0 = getPartialSeg(seg, 0, t)
ctrlPts1 = getPartialSeg(seg, t, 1)
segPt = [ctrlPts0[2], ctrlPts1[0], ctrlPts1[1]]
prevRight = ctrlPts0[1]
nextLeft = ctrlPts1[2]
pt.handle_left = segPt[0]
pt.co = segPt[1]
pt.handle_right = segPt[2]
pt.handle_left_type = handleType
pt.handle_right_type = handleType
prevPt.handle_right = prevRight
prevPt = pt
nextPt.handle_left = nextLeft
firstPt.handle_right_type = fhdl
nextPt.handle_left_type = nhdl
# https://devtalk.blender.org/t/get-hex-gamma-corrected-color/2422/2
def toHexStr(rgba):
ch = []
for c in rgba[:3]:
if c < 0.0031308:
cc = 0.0 if c < 0.0 else c * 12.92
else:
cc = 1.055 * pow(c, 1.0 / 2.4) - 0.055
ch.append(hex(max(min(int(cc * 255 + 0.5), 255), 0))[2:])
return ''.join(ch), str(rgba[-1])
# Change position of bezier points according to new matrix_world
def changeMW(obj, newMW):
invMW = newMW.inverted_safe()
for spline in obj.data.splines:
for pt in spline.bezier_points:
pt.co = invMW @ (obj.mw @ pt.co)
pt.handle_left = invMW @ (obj.mw @ pt.handle_left)
pt.handle_right = invMW @ (obj.mw @ pt.handle_right)
obj.matrix_world = newMW
# Return map in the form of objName->[splineIdx, [startPt, endPt]]
# Remove the invalid keys (if any) from it.
def updateCurveEndPtMap(endPtMap, addObjNames = None, removeObjNames = None):
invalOs = set()
if(addObjNames == None):
addObjNames = [o.name for o in bpy.context.scene.objects]
invalOs = endPtMap.keys() - set(addObjNames) # In case of redo
if(removeObjNames != None):
invalOs.union(set(removeObjNames))
for o in invalOs:
del endPtMap[o]
for objName in addObjNames:
obj = bpy.context.scene.objects.get(objName)
if(obj != None and isBezier(obj) and obj.visible_get()):
endPtMap[objName] = []
mw = obj.matrix_world
for i, s in enumerate(obj.data.splines):
pts = [mw @ pt.co for pt in s.bezier_points]
endPtMap[objName].append([i, pts])
elif(endPtMap.get(objName) != None):
del endPtMap[objName]
return endPtMap
#Round to logarithmic scale .1, 0, 10, 100 etc.
#(47.538, -1) -> 47.5; (47.538, 0) -> 48.0; (47.538, 1) -> 50.0; (47.538, 2) -> 0,
# TODO: Rework after grid subdiv is enabled (in a version later than 2.8)
def roundedVect(space3d, vect, rounding, axes):
rounding += 1
subdiv = getGridSubdiv(space3d)
# TODO: Separate logic for 1
if(subdiv == 1): subdiv = 10
fact = ((subdiv ** rounding) / subdiv) / getUnitScale()
retVect = vect.copy()
# ~ Vector([round(vect[i] / fact) * fact for i in axes])
for i in axes: retVect[i] = round(vect[i] / fact) * fact
return retVect
###################### Screen functions ######################
def getGridSubdiv(space3d):
return space3d.overlay.grid_subdivisions
def getUnit():
return bpy.context.scene.unit_settings.length_unit
def getUnitSystem():
return bpy.context.scene.unit_settings.system
def getUnitScale():
fact = 3.28084 if(getUnitSystem() == 'IMPERIAL') else 1
return fact * bpy.context.scene.unit_settings.scale_length
def get3dLoc(region, rv3d, xy, vec = None):
if(vec == None):
vec = region_2d_to_vector_3d(region, rv3d, xy)
return region_2d_to_location_3d(region, rv3d, xy, vec)
# TODO: Rework after grid subdiv is enabled (in a version later than 2.8)
def getViewDistRounding(space3d, rv3d):
viewDist = rv3d.view_distance * getUnitScale()
gridDiv = getGridSubdiv(space3d)
subFact = 1
# TODO: Separate logic for 1
if(gridDiv == 1): gridDiv = 10
elif(gridDiv == 2): subFact = 5
elif(viewDist < 0.5): subFact = 2
return int(log(viewDist, gridDiv)) - subFact
# Return axis-indices (x:0, y:1, z:2) of plane with closest orientation
# to view
def getClosestPlaneToView(rv3d):
viewmat = rv3d.view_matrix
trans, quat, scale = viewmat.decompose()
tm = quat.to_matrix().to_4x4()
viewnormal = tm.inverted() @ Vector((0, 0, 1))
xynormal = [Vector((0, 0, 1)), [0, 1]]
yznormal = [Vector((1, 0, 0)), [1, 2]]
xznormal = [Vector((0, 1, 0)), [0, 2]]
normals = [xynormal, yznormal, xznormal]
minAngle = pi
minIdx = None
for idx, normal in enumerate(normals):
rotDiff = viewnormal.rotation_difference(normal[0]).angle
if(rotDiff > pi / 2):
rotDiff = pi - rotDiff
if(rotDiff < minAngle):
minIdx = idx
minAngle = rotDiff
return normals[minIdx][1]
def getCoordFromLoc(region, rv3d, loc):
coord = location_3d_to_region_2d(region, rv3d, loc)
# return a unlocatable pt if None to avoid errors
return coord if(coord != None) else Vector((9000, 9000))
# To be called only from 3d view
def getCurrAreaRegion(context):
a, r = [(a, r) for a in bpy.context.screen.areas if a.type == 'VIEW_3D' \
for r in a.regions if(r == context.region)][0]
return a, r
def isOutside(context, event, exclInRgns = True):
x = event.mouse_region_x
y = event.mouse_region_y
region = context.region
if(x < 0 or x > region.width or y < 0 or y > region.height):
return True
elif(not exclInRgns):
return False
area, r = getCurrAreaRegion(context)
for r in area.regions:
if(r == region):
continue
xR = r.x - region.x
yR = r.y - region.y
if(x >= xR and y >= yR and x <= (xR + r.width) and y <= (yR + r.height)):
return True
return False
def getPtProjOnPlane(region, rv3d, xy, p1, p2, p3, p4 = None):
vec = region_2d_to_vector_3d(region, rv3d, xy)
orig = region_2d_to_origin_3d(region, rv3d, xy)
pt = geometry.intersect_ray_tri(p1, p2, p3, vec, orig, False)#p4 != None)
# ~ if(not pt and p4):
# ~ pt = geometry.intersect_ray_tri(p2, p4, p3, vec, orig, True)
return pt
# find the location on 3d line p1-p2 if xy is already on 2d projection (in rv3d) of p1-p2
def getPtProjOnLine(region, rv3d, xy, p1, p2):
# Just find a non-linear point (TODO: simpler way)
pd1 = p2 - p1
pd2 = Vector(sorted(pd1, reverse = True))
maxIdx0 = [i for i in range(3) if pd1[i] == pd2[0]][0]
maxIdx1 = [i for i in range(3) if pd1[i] == pd2[1]][0]
pd = Vector()
pd[maxIdx0] = -pd2[1]
pd[maxIdx1] = pd2[0]
p3 = p2 + pd
# Raycast from 2d point onto the plane
return getPtProjOnPlane(region, rv3d, xy[:2], p1, p2, p3)
def getLineTransMatrices(pt0, pt1):
diffV = (pt1 - pt0)
invTm = diffV.to_track_quat('X', 'Z').to_matrix().to_4x4()
tm = invTm.inverted_safe()
return tm, invTm
def getWindowRegionIdx(area, regionIdx): # For finding quad view index
idx = 0
for j, r in enumerate(area.regions):
if(j == regionIdx): return idx
if(r.type == 'WINDOW'): idx += 1
return None
def getAreaRegionIdxs(xy, exclInRgns = True):
x, y = xy
areas = [a for a in bpy.context.screen.areas]
idxs = None
for i, a in enumerate(areas):
if(a.type != 'VIEW_3D'): continue
regions = [r for r in a.regions]
for j, r in enumerate(regions):
if(x > r.x and x < r.x + r.width and y > r.y and y < r.y + r.height):
if(r.type == 'WINDOW'):
if(not exclInRgns):
return [i, j]
idxs = [i, j]
elif(exclInRgns):
return None
return idxs
# ~ def getMinViewDistRegion():
# ~ viewDist = 9e+99
# ~ rv3d = None
# ~ area = None
# ~ region = None
# ~ areas = [a for a in bpy.context.screen.areas if(a.type == 'VIEW_3D')]
# ~ for a in areas:
# ~ regions = [r for r in a.regions if r.type == 'WINDOW']
# ~ if(len(a.spaces[0].region_quadviews) > 0):
# ~ for i, r in enumerate(a.spaces[0].region_quadviews):
# ~ if(r.view_distance < viewDist):
# ~ viewDist = r.view_distance
# ~ rv3d = r
# ~ area = a
# ~ region = regions[i]
# ~ else:
# ~ r = a.spaces[0].region_3d
# ~ if(r.view_distance < viewDist):
# ~ viewDist = r.view_distance
# ~ rv3d = r
# ~ area = a
# ~ region = regions[0]
# ~ return a, region, rv3d#, viewDist
def getAllAreaRegions():
info = []
areas = []
i = 0
areas = [a for a in bpy.context.screen.areas if(a.type == 'VIEW_3D')]
# bpy.context.screen doesn't work in case of Add-on Config window
while(len(areas) == 0 and i < len(bpy.data.screens)):
areas = [a for a in bpy.data.screens[i].areas if(a.type == 'VIEW_3D')]
i += 1
for a in areas:
regions = [r for r in a.regions if r.type == 'WINDOW']
if(len(a.spaces[0].region_quadviews) > 0):
for i, r in enumerate(a.spaces[0].region_quadviews):
info.append([a, regions[i], r])
else:
r = a.spaces[0].region_3d
info.append([a, regions[0], r])
return info
def getResetBatch(shader, btype): # "LINES" or "POINTS"
return batch_for_shader(shader, btype, {"pos": [], "color": []})
# From python template
def getFaceUnderMouse(obj, region, rv3d, xy, maxFaceCnt):
if(obj == None or obj.type != 'MESH' \
or len(obj.data.polygons) > maxFaceCnt):
return None, None, None
viewVect = region_2d_to_vector_3d(region, rv3d, xy)
rayOrig = region_2d_to_origin_3d(region, rv3d, xy)
mw = obj.matrix_world
invMw = mw.inverted_safe()
rayTarget = rayOrig + viewVect
rayOrigObj = invMw @ rayOrig
rayTargetObj = invMw @ rayTarget
rayDirObj = rayTargetObj - rayOrigObj
success, location, normal, faceIdx = obj.ray_cast(rayOrigObj, rayDirObj)
if(success):
return mw @ location, normal, faceIdx
else:
return None, None, None
def getSnappableObjs(region, rv3d, xy):
objs = bpy.context.selected_objects
if(bpy.context.object != None):
objs.append(bpy.context.object)
return [o for o in objs if(o.type == 'MESH' and len(o.modifiers) == 0 and \
isPtIn2dBBox(o, region, rv3d, xy))]
# precise can be pretty expensive with large vert count
def get2dBBox(obj, region, rv3d, precise = False):
mw = obj.matrix_world
if(precise):
co2ds = [getCoordFromLoc(region, rv3d, mw @ Vector(v.co)) \
for v in obj.data.vertices]
else:
co2ds = [getCoordFromLoc(region, rv3d, mw @ Vector(b)) for b in obj.bound_box]
minX = min(c[0] for c in co2ds)
maxX = max(c[0] for c in co2ds)
minY = min(c[1] for c in co2ds)
maxY = max(c[1] for c in co2ds)
return minX, minY, maxX, maxY
def isPtIn2dBBox(obj, region, rv3d, xy, extendBy = 0, precise = False):
minX, minY, maxX, maxY = get2dBBox(obj, region, rv3d, precise)
if(xy[0] > (minX - extendBy) and xy[0] < (maxX + extendBy) \
and xy[1] > (minY - extendBy) and xy[1] < (maxY + extendBy)):
return True
else: return False
# ~ def isLocIn2dBBox(obj, region, rv3d, loc, extendBy = 0, precise = False):
# ~ xy = getCoordFromLoc(region, rv3d, loc)
# ~ return isPtIn2dBBox(obj, region, rv3d, xy, extendBy, precise)
def getClosestEdgeLoc2d(obj, region, rv3d, xy, faceIdx = None):
mw = obj.matrix_world
minDist = LARGE_NO
closestLoc = None
pt = Vector(xy).to_3d()
edgeWSCos = None
edgeIdx = None
closestIntersect = None
vertPairs = obj.data.polygons[faceIdx].edge_keys if faceIdx != None \
else [e.vertices for e in obj.data.edges]
for i, vertPair in enumerate(vertPairs):
co0 = mw @ obj.data.vertices[vertPair[0]].co
co1 = mw @ obj.data.vertices[vertPair[1]].co
pt0 = getCoordFromLoc(region, rv3d, co0).to_3d()
pt1 = getCoordFromLoc(region, rv3d, co1).to_3d()
intersect, percDist = geometry.intersect_point_line(pt, pt0, pt1)
if(percDist < 0):
intersect = pt0
percDist = 0
elif(percDist > 1):
intersect = pt1
percDist = 1
dist = (intersect - pt).length
if(dist < minDist):
minDist = dist
closestIntersect = intersect
edgeWSCos = [co0, co1]
edgeIdx = i
if(edgeWSCos != None):
closestLoc = getPtProjOnLine(region, rv3d, closestIntersect, \
edgeWSCos[0], edgeWSCos[1])
return edgeIdx, edgeWSCos, closestLoc, minDist
# TODO: Fix the signature
def getSelFaceLoc(region, rv3d, xy, maxFaceCnt, objs = None, checkEdge = False):
if(objs == None): objs = getSnappableObjs(region, rv3d, xy)
if(len(objs) > maxFaceCnt): return None, None, None, None
for obj in objs:
loc, normal, faceIdx = getFaceUnderMouse(obj, region, rv3d, xy, maxFaceCnt)
if(loc != None):
if(checkEdge):
edgeIdx, edgeWSCos, closestLoc, minDist = \
getClosestEdgeLoc2d(obj, region, rv3d, xy, faceIdx)
if(closestLoc != None and minDist < FTProps.snapDist):
return obj, closestLoc, normal, faceIdx
return obj, loc, normal, faceIdx
return None, None, None, None
# TODO: Fix the signature
# ~ def getSelEdgeLoc(region, rv3d, xy, maxFaceCnt, objs = None):
# ~ if(objs == None): objs = getSnappableObjs()
# ~ if(len(objs) > maxFaceCnt): return None, None, None, None
# ~ minDist = LARGE_NO
# ~ closestLoc = None
# ~ closestEdgeIdx = None
# ~ closestObj = None
# ~ objCnt = 0
# ~ objs = bpy.context.selected_objects
# ~ if(bpy.context.object != None): objs.append(bpy.context.object)
# ~ for obj in objs:
# ~ edgeIdx, edgeWSCos, loc, dist = \
# ~ getClosestEdgeLoc2d(obj, region, rv3d, xy)
# ~ if(dist < minDist):
# ~ minDist = dist
# ~ closestLoc = loc
# ~ closestEdgeIdx = edgeIdx
# ~ closestObj = obj
# ~ return closestObj, closestLoc, minDist, closestEdgeIdx
###################### Op Specific functions ######################
def closeSplines(curve, htype = None):
for spline in curve.data.splines:
if(htype != None):
spline.bezier_points[0].handle_left_type = htype
spline.bezier_points[-1].handle_right_type = htype
spline.use_cyclic_u = True
# TODO: Update shapekey (not working due to moving of start pt in cyclic)
def splitCurveSelPts(selPtMap, newColl = True):
changeCnt = 0
newObjs = []
if(len(selPtMap) == 0): return newObjs, changeCnt
for obj in selPtMap.keys():
splinePtMap = selPtMap.get(obj)
if((len(obj.data.splines) == 1 and \
len(obj.data.splines[0].bezier_points) <= 2 and \
not obj.data.splines[0].use_cyclic_u) or len(splinePtMap) == 0):
continue
keyNames, keyData = getShapeKeyInfo(obj)
collections = obj.users_collection
if(newColl):
objGrp = bpy.data.collections.new(obj.name)
parentColls = [objGrp]
else:
parentColls = collections
splineCnt = len(obj.data.splines)
endSplineIdx = splineCnt- 1
if(endSplineIdx not in splinePtMap.keys()):
splinePtMap[endSplineIdx] = \