File size: 26,987 Bytes
985c397 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 | # SPDX-License-Identifier: LGPL-2.1-or-later
# ***************************************************************************
# * *
# * Copyright (c) 2012 Yorik van Havre <yorik@uncreated.net> *
# * *
# * This file is part of FreeCAD. *
# * *
# * FreeCAD is free software: you can redistribute it and/or modify it *
# * under the terms of the GNU Lesser General Public License as *
# * published by the Free Software Foundation, either version 2.1 of the *
# * License, or (at your option) any later version. *
# * *
# * FreeCAD is distributed in the hope that it will be useful, but *
# * WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
# * Lesser General Public License for more details. *
# * *
# * You should have received a copy of the GNU Lesser General Public *
# * License along with FreeCAD. If not, see *
# * <https://www.gnu.org/licenses/>. *
# * *
# ***************************************************************************
"The FreeCAD Arch Vector Rendering Module"
## @package ArchVRM
# \ingroup ARCH
# \brief The Arch Vector Rendering Module
#
# This module provides the Renderer Class, that allows one to
# produce SVG renderings of projected shapes, with filled faces.
# It is used by the "Solid" mode of Arch views in TechDraw and Drawing,
# and is called from ArchSectionPlane code.
import math
import FreeCAD
import ArchCommands
import Draft
import DraftVecUtils
import DraftGeomUtils
import Part
from draftutils import params
MAXLOOP = 10 # the max number of loop before abort
# WARNING: in this module, faces are lists whose first item is the actual OCC face, the
# other items being additional information such as color, etc.
DEBUG = params.get_param_arch("ShowVRMDebug")
class Renderer:
"A renderer object"
def __init__(self, wp=None):
"""
Creates a renderer with a default Draft WorkingPlane
Use like this:
import ArchVRM
p = ArchVRM.Renderer()
p.add(App.ActiveDocument.ActiveObject)
p.sort()
p.buildDummy()
"""
self.reset()
if wp:
self.wp = wp
else:
import WorkingPlane
self.wp = WorkingPlane.PlaneBase()
if DEBUG:
print("Renderer initialized on " + str(self.wp))
def __str__(self):
return "Arch Renderer: " + str(len(self.faces)) + " faces projected on " + str(self.wp)
def reset(self):
"removes all faces from this renderer"
self.objects = []
self.shapes = []
self.faces = []
self.resetFlags()
def resetFlags(self):
"resets all flags of this renderer"
self.oriented = False
self.trimmed = False
self.sorted = False
self.iscut = False
self.joined = False
self.sections = []
self.hiddenEdges = []
def setWorkingPlane(self, wp):
"sets a Draft WorkingPlane or Placement for this renderer"
if isinstance(wp, FreeCAD.Placement):
self.wp.align_to_placement(wp)
else:
self.wp = wp
if DEBUG:
print("Renderer set on " + str(self.wp))
def addFaces(self, faces, color=(0.9, 0.9, 0.9, 1.0)):
"add individual faces to this renderer, optionally with a color"
if DEBUG:
print(
"adding ",
len(faces),
" faces. Warning, these will get lost if using cut() or join()",
)
for f in faces:
self.faces.append([f, color])
self.resetFlags()
def addObjects(self, objs):
"add objects to this renderer"
for o in objs:
if o.isDerivedFrom("Part::Feature"):
self.objects.append(o)
color = o.ViewObject.ShapeColor
if o.Shape.Faces:
self.shapes.append([o.Shape, color])
for f in o.Shape.Faces:
self.faces.append([f, color])
self.resetFlags()
if DEBUG:
print("adding ", len(self.objects), " objects, ", len(self.faces), " faces")
def addShapes(self, shapes, color=(0.9, 0.9, 0.9, 1.0)):
"add shapes to this renderer, optionally with a color. Warning, these will get lost if using join()"
if DEBUG:
print("adding ", len(shapes), " shapes")
for s in shapes:
if s.Faces:
self.shapes.append([s, color])
for f in s.Faces:
self.faces.append([f, color])
self.resetFlags()
def info(self):
"Prints info about the contents of this renderer"
r = str(self) + "\n"
r += "oriented: " + str(self.oriented) + "\n"
r += "trimmed: " + str(self.trimmed) + "\n"
r += "sorted: " + str(self.sorted) + "\n"
r += "contains " + str(len(self.faces)) + " faces\n"
for i in range(len(self.faces)):
r += " face " + str(i) + " : center " + str(self.faces[i][0].CenterOfMass)
r += " : normal " + str(self.faces[i][0].normalAt(0, 0))
r += ", " + str(len(self.faces[i][0].Vertexes)) + " verts"
r += ", color: " + self.getFill(self.faces[i][1]) + "\n"
return r
def addLabels(self):
"Add labels on the model to identify faces"
c = 0
for f in self.faces:
l = FreeCAD.ActiveDocument.addObject("App::AnnotationLabel", "facelabel")
l.BasePosition = f[0].CenterOfMass
l.LabelText = str(c)
c += 1
def isVisible(self, face):
"returns True if the given face points in the view direction"
normal = face[0].normalAt(0, 0)
if DEBUG:
print(
"checking face normal ",
normal,
" against ",
self.wp.axis,
" : ",
math.degrees(normal.getAngle(self.wp.axis)),
)
if normal.getAngle(self.wp.axis) < math.pi / 2:
return True
return False
def reorient(self):
"reorients the faces on the WP"
# print("VRM: start reorient")
if not self.faces:
return
self.faces = [self.projectFace(f) for f in self.faces]
if self.sections:
self.sections = [self.projectFace(f) for f in self.sections]
if self.hiddenEdges:
self.hiddenEdges = [self.projectEdge(e) for e in self.hiddenEdges]
self.oriented = True
# print("VRM: end reorient")
def removeHidden(self):
"removes faces pointing outwards"
if not self.faces:
return
faces = []
for f in self.faces:
if self.isVisible(f):
faces.append(f)
if DEBUG:
print(len(self.faces) - len(faces), " faces removed, ", len(faces), " faces retained")
self.faces = faces
self.trimmed = True
def projectFace(self, face):
"projects a single face on the WP"
# print("VRM: projectFace start: ",len(face[0].Vertexes)," verts, ",len(face[0].Edges)," edges")
wires = []
if not face[0].Wires:
if DEBUG:
print("Error: Unable to project face on the WP")
return None
norm = face[0].normalAt(0, 0)
for w in face[0].Wires:
verts = []
edges = Part.__sortEdges__(w.Edges)
# print(len(edges)," edges after sorting")
for e in edges:
v = e.Vertexes[0].Point
# print(v)
v = self.wp.get_local_coords(v)
verts.append(v)
verts.append(verts[0])
if len(verts) > 2:
# print("new wire with ",len(verts))
wires.append(Part.makePolygon(verts))
try:
sh = ArchCommands.makeFace(wires)
except Exception:
if DEBUG:
print("Error: Unable to project face on the WP")
return None
else:
# restoring flipped normals
vnorm = self.wp.get_local_coords(norm)
if vnorm.getAngle(sh.normalAt(0, 0)) > 1:
sh.reverse()
# print("VRM: projectFace end: ",len(sh.Vertexes)," verts")
return [sh] + face[1:]
def projectEdge(self, edge):
"projects a single edge on the WP"
if len(edge.Vertexes) > 1:
v1 = self.wp.get_local_coords(edge.Vertexes[0].Point)
v2 = self.wp.get_local_coords(edge.Vertexes[-1].Point)
return Part.LineSegment(v1, v2).toShape()
return edge
def flattenFace(self, face):
"Returns a face where all vertices have Z = 0"
wires = []
for w in face[0].Wires:
verts = []
edges = Part.__sortEdges__(w.Edges)
for e in edges:
v = e.Vertexes[0].Point
verts.append(FreeCAD.Vector(v.x, v.y, 0))
verts.append(verts[0])
wires.append(Part.makePolygon(verts))
try:
sh = Part.Face(wires)
except Part.OCCError:
if DEBUG:
print("Error: Unable to flatten face")
return None
else:
return [sh] + face[1:]
def cut(self, cutplane, hidden=False):
"Cuts through the shapes with a given cut plane and builds section faces"
if DEBUG:
print("\n\n======> Starting cut\n\n")
if self.iscut:
return
if not self.shapes:
if DEBUG:
print("No objects to make sections")
else:
fill = (1.0, 1.0, 1.0, 1.0)
shps = []
for sh in self.shapes:
shps.append(sh[0])
cutface, cutvolume, invcutvolume = ArchCommands.getCutVolume(cutplane, shps)
if cutface and cutvolume:
shapes = []
faces = []
sections = []
for sh in self.shapes:
for sol in sh[0].Solids:
c = sol.cut(cutvolume)
shapes.append([c] + sh[1:])
for f in c.Faces:
faces.append([f] + sh[1:])
# print("iscoplanar:",f.Vertexes[0].Point,f.normalAt(0,0),cutface.Vertexes[0].Point,cutface.normalAt(0,0))
if DraftGeomUtils.isCoplanar([f, cutface]):
print("COPLANAR")
sections.append([f, fill])
if hidden:
c = sol.cut(invcutvolume)
self.hiddenEdges.extend(c.Edges)
self.shapes = shapes
self.faces = faces
self.sections = sections
if DEBUG:
print(
"Built ",
len(self.sections),
" sections, ",
len(self.faces),
" faces retained",
)
self.iscut = True
self.oriented = False
self.trimmed = False
self.sorted = False
self.joined = False
if DEBUG:
print("\n\n======> Finished cut\n\n")
def isInside(self, vert, face):
"Returns True if the vert is inside the face in Z projection"
if not face:
return False
# http://paulbourke.net/geometry/insidepoly/
count = 0
p = self.wp.get_local_coords(vert.Point)
for e in face[0].Edges:
p1 = e.Vertexes[0].Point
p2 = e.Vertexes[-1].Point
if p.y > min(p1.y, p2.y):
if p.y <= max(p1.y, p2.y):
if p.x <= max(p1.x, p2.x):
if p1.y != p2.y:
xinters = (p.y - p1.y) * (p2.x - p1.x) / (p2.y - p1.y) + p1.x
if (p1.x == p2.x) or (p.x <= xinters):
count += 1
if count % 2 == 0:
return False
else:
return True
def zOverlaps(self, face1, face2):
"Checks if face1 overlaps face2 in Z direction"
face1 = self.flattenFace(face1)
face2 = self.flattenFace(face2)
if (not face1) or (not face2):
return False
# first we check if one of the verts is inside the other face
for v in face1[0].Vertexes:
if self.isInside(v, face2):
return True
# even so, faces can still overlap if their edges cross each other
for e1 in face1[0].Edges:
for e2 in face2[0].Edges:
if DraftGeomUtils.findIntersection(e1, e2):
return True
return False
def compare(self, face1, face2):
"zsorts two faces. Returns 1 if face1 is closer, 2 if face2 is closer, 0 otherwise"
# print(face1,face2)
if not face1:
if DEBUG:
print("Warning, undefined face!")
return 31
elif not face2:
if DEBUG:
print("Warning, undefined face!")
return 32
# theory from
# http://www.siggraph.org/education/materials/HyperGraph/scanline/visibility/painter.htm
# and practical application http://vrm.ao2.it/ (blender vector renderer)
b1 = face1[0].BoundBox
b2 = face2[0].BoundBox
# test 1: if faces don't overlap, no comparison possible
if DEBUG:
print("doing test 1")
if b1.XMax < b2.XMin:
return 0
if b1.XMin > b2.XMax:
return 0
if b1.YMax < b2.YMin:
return 0
if b1.YMin > b2.YMax:
return 0
if DEBUG:
print("failed, faces bboxes are not distinct")
# test 2: if Z bounds don't overlap, it's easy to know the closest
if DEBUG:
print("doing test 2")
if b1.ZMax < b2.ZMin:
return 2
if b2.ZMax < b1.ZMin:
return 1
if DEBUG:
print("failed, faces Z are not distinct")
# test 3: all verts of face1 are in front or behind the plane of face2
if DEBUG:
print("doing test 3")
norm = face2[0].normalAt(0, 0)
behind = 0
front = 0
for v in face1[0].Vertexes:
dv = v.Point.sub(face2[0].Vertexes[0].Point)
dv = DraftVecUtils.project(dv, norm)
if DraftVecUtils.isNull(dv):
behind += 1
front += 1
else:
if dv.getAngle(norm) > 1:
behind += 1
else:
front += 1
if DEBUG:
print("front: ", front, " behind: ", behind)
if behind == len(face1[0].Vertexes):
return 2
elif front == len(face1[0].Vertexes):
return 1
if DEBUG:
print("failed, cannot say if face 1 is in front or behind")
# test 4: all verts of face2 are in front or behind the plane of face1
if DEBUG:
print("doing test 4")
norm = face1[0].normalAt(0, 0)
behind = 0
front = 0
for v in face2[0].Vertexes:
dv = v.Point.sub(face1[0].Vertexes[0].Point)
dv = DraftVecUtils.project(dv, norm)
if DraftVecUtils.isNull(dv):
behind += 1
front += 1
else:
if dv.getAngle(norm) > 1:
behind += 1
else:
front += 1
if DEBUG:
print("front: ", front, " behind: ", behind)
if behind == len(face2[0].Vertexes):
return 1
elif front == len(face2[0].Vertexes):
return 2
if DEBUG:
print("failed, cannot say if face 2 is in front or behind")
# test 5: see if faces projections don't overlap, vertexwise
if DEBUG:
print("doing test 5")
if not self.zOverlaps(face1, face2):
return 0
elif not self.zOverlaps(face2, face1):
return 0
if DEBUG:
print("failed, faces are overlapping")
if DEBUG:
print("Houston, all tests passed, and still no results")
return 0
def join(self, otype):
"joins the objects of same type"
import Part
walls = []
structs = []
objs = []
for o in obj.Source.Objects:
t = Draft.getType(o)
if t == "Wall":
walls.append(o)
elif t == "Structure":
structs.append(o)
else:
objs.append(o)
for g in [walls, structs]:
if g:
print("group:", g)
col = g[0].ViewObject.DiffuseColor[0]
s = g[0].Shape
for o in g[1:]:
try:
fs = s.fuse(o.Shape)
fs = fs.removeSplitter()
except Part.OCCError:
print("shape fusion failed")
objs.append([o.Shape, o.ViewObject.DiffuseColor[0]])
else:
s = fs
objs.append([s, col])
def findPosition(self, f1, faces):
"Finds the position of a face in a list of faces"
l = None
h = None
for f2 in faces:
if DEBUG:
print(
"comparing face",
str(self.faces.index(f1)),
" with face",
str(self.faces.index(f2)),
)
r = self.compare(f1, f2)
if r == 1:
l = faces.index(f2)
elif r == 2:
if h is None:
h = faces.index(f2)
else:
if faces.index(f2) < h:
h = faces.index(f2)
if l is not None:
return l + 1
elif h is not None:
return h
else:
return None
def sort(self):
"projects a shape on the WP"
if DEBUG:
print("\n\n======> Starting sort\n\n")
if len(self.faces) <= 1:
return
if not self.trimmed:
self.removeHidden()
if DEBUG:
print("Done hidden face removal")
if len(self.faces) == 1:
return
if not self.oriented:
self.reorient()
if DEBUG:
print("Done reorientation")
faces = self.faces[:]
if DEBUG:
print("sorting ", len(self.faces), " faces")
sfaces = []
loopcount = 0
notfoundstack = 0
while faces:
if DEBUG:
print("loop ", loopcount)
f1 = faces[0]
if sfaces and (notfoundstack < len(faces)):
if DEBUG:
print("using ordered stack, notfound = ", notfoundstack)
p = self.findPosition(f1, sfaces)
if p is None:
# no position found, we move the face to the end of the pile
faces.remove(f1)
faces.append(f1)
notfoundstack += 1
else:
# position found, we insert it
faces.remove(f1)
sfaces.insert(p, f1)
notfoundstack = 0
else:
# either there is no stack, or no more face can be compared
# find a root, 2 faces that can be compared
if DEBUG:
print("using unordered stack, notfound = ", notfoundstack)
for f2 in faces[1:]:
if DEBUG:
print(
"comparing face",
str(self.faces.index(f1)),
" with face",
str(self.faces.index(f2)),
)
r = self.compare(f1, f2)
print("comparison result:", r)
if r == 1:
faces.remove(f2)
sfaces.append(f2)
faces.remove(f1)
sfaces.append(f1)
notfoundstack = 0
break
elif r == 2:
faces.remove(f1)
sfaces.append(f1)
faces.remove(f2)
sfaces.append(f2)
notfoundstack = 0
break
elif r == 31:
if f1 in faces:
faces.remove(f1)
elif r == 32:
if f2 in faces:
faces.remove(f2)
else:
# nothing found, move the face to the end of the pile
if f1 in faces:
faces.remove(f1)
faces.append(f1)
loopcount += 1
if loopcount == MAXLOOP * len(self.faces):
if DEBUG:
print("Too many loops, aborting.")
break
if DEBUG:
print(
"done Z sorting. ",
len(sfaces),
" faces retained, ",
len(self.faces) - len(sfaces),
" faces lost.",
)
self.faces = sfaces
self.sorted = True
if DEBUG:
print("\n\n======> Finished sort\n\n")
def buildDummy(self):
"Builds a dummy object with faces spaced on the Z axis, for visual check"
z = 0
if not self.sorted:
self.sort()
faces = []
for f in self.faces[:]:
ff = self.flattenFace(f)[0]
ff.translate(FreeCAD.Vector(0, 0, z))
faces.append(ff)
z += 1
if faces:
c = Part.makeCompound(faces)
Part.show(c)
def getFill(self, fill):
"Returns a SVG fill value"
r = str(hex(int(fill[0] * 255)))[2:].zfill(2)
g = str(hex(int(fill[1] * 255)))[2:].zfill(2)
b = str(hex(int(fill[2] * 255)))[2:].zfill(2)
col = "#" + r + g + b
return col
def getPathData(self, w):
"Returns a SVG path data string from a 2D wire"
def tostr(val):
return str(round(val, Draft.precision()))
edges = Part.__sortEdges__(w.Edges)
v = edges[0].Vertexes[0].Point
svg = "M " + tostr(v.x) + " " + tostr(v.y) + " "
for e in edges:
if (DraftGeomUtils.geomType(e) == "Line") or (
DraftGeomUtils.geomType(e) == "BSplineCurve"
):
v = e.Vertexes[-1].Point
svg += "L " + tostr(v.x) + " " + tostr(v.y) + " "
elif DraftGeomUtils.geomType(e) == "Circle":
r = e.Curve.Radius
v = e.Vertexes[-1].Point
svg += "A " + tostr(r) + " " + tostr(r) + " 0 0 1 " + tostr(v.x) + " "
svg += tostr(v.y) + " "
if len(edges) > 1:
svg += "Z "
return svg
def getViewSVG(self, linewidth=0.01):
"Returns a SVG fragment from viewed faces"
if DEBUG:
print("Printing ", len(self.faces), " faces")
if not self.sorted:
self.sort()
svg = (
'<g stroke="#000000" stroke-width="'
+ str(linewidth)
+ '" style="stroke-width:'
+ str(linewidth)
)
svg += ';stroke-miterlimit:1;stroke-linejoin:round;stroke-dasharray:none;">\n'
for f in self.faces:
if f:
fill = self.getFill(f[1])
svg += " <path "
svg += 'd="'
for w in f[0].Wires:
svg += self.getPathData(w)
svg += '" style="fill:' + fill + ';fill-rule: evenodd;"/>\n'
svg += "</g>\n"
return svg
def getSectionSVG(self, linewidth=0.02, fillpattern=None):
"Returns a SVG fragment from cut faces"
if DEBUG:
print("Printing ", len(self.sections), " sections")
if not self.oriented:
self.reorient()
svg = (
'<g stroke="#000000" stroke-width="'
+ str(linewidth)
+ '" style="stroke-width:'
+ str(linewidth)
)
svg += ';stroke-miterlimit:1;stroke-linejoin:round;stroke-dasharray:none;">\n'
for f in self.sections:
if f:
if fillpattern:
if "#" in fillpattern: # color
fill = fillpattern
else:
fill = "url(#" + fillpattern + ")" # pattern name
else:
fill = "none" # none
svg += "<path "
svg += 'd="'
for w in f[0].Wires:
# print("wire with ",len(w.Vertexes)," verts")
svg += self.getPathData(w)
svg += '" style="fill:' + fill + ';fill-rule: evenodd;"/>\n'
svg += "</g>\n"
return svg
def getHiddenSVG(self, linewidth=0.02):
"Returns a SVG fragment from cut geometry"
if DEBUG:
print("Printing ", len(self.sections), " hidden faces")
if not self.oriented:
self.reorient()
svg = (
'<g stroke="#000000" stroke-width="'
+ str(linewidth)
+ '" style="stroke-width:'
+ str(linewidth)
)
svg += (
';stroke-miterlimit:1;stroke-linejoin:round;stroke-dasharray:0.09,0.05;fill:none;">\n'
)
for e in self.hiddenEdges:
svg += "<path "
svg += 'd="'
svg += self.getPathData(e)
svg += '"/>\n'
svg += "</g>\n"
return svg
|