forked from blender/blender-addons
-
Notifications
You must be signed in to change notification settings - Fork 0
/
space_view3d_panel_measure.py
1549 lines (1228 loc) · 53.1 KB
/
space_view3d_panel_measure.py
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
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
#
# Uses volume calculation and manifold check code (GPL2+) from:
# http:https://www.shapeways.com/forum/index.php?t=msg&goto=3639
# Shapeways Volume Calculator by Benjamin Lauritzen (Loonsbury)
#
# #################################
bl_info = {
"name": "Measure Panel",
"author": "Buerbaum Martin (Pontiac), TNae (Normal patch)," \
" Benjamin Lauritzen (Loonsbury; Volume code)," \
" Alessandro Sala (patch: Units in 3D View)",
"version": (0, 8, 9),
"blender": (2, 6, 0),
"location": "View3D > Properties > Measure Panel",
"description": "Measure distances between objects",
"warning": "Script needs repairs",
"wiki_url": "http:https://wiki.blender.org/index.php/Extensions:2.6/Py/" \
"Scripts/3D_interaction/Panel_Measure",
"tracker_url": "https://projects.blender.org/tracker/index.php?" \
"func=detail&aid=21445",
"category": "3D View"}
"""
Measure panel
This script displays in OBJECT MODE:
* The distance of the 3D cursor to the origin of the
3D space (if NOTHING is selected).
* The distance of the 3D cursor to the center of an object
(if exactly ONE object is selected).
* The distance between 2 object centers
(if exactly TWO objects are selected).
* The surface area of any selected mesh object.
* The average normal of the mesh surface of any selected mesh object.
* The volume of any selected mesh object.
Display in EDIT MODE (Local and Global space supported):
* The distance of the 3D cursor to the origin
(in Local space it is the object center instead).
* The distance of the 3D cursor to a selected vertex.
* The distance between 2 selected vertices.
Usage:
This functionality can be accessed via the
"Properties" panel in 3D View ([N] key).
It's very helpful to use one or two "Empty" objects with
"Snap during transform" enabled for fast measurement.
More links:
http:https://gitorious.org/blender-scripts/blender-measure-panel-script
http:https://blenderartists.org/forum/showthread.php?t=177800
"""
import bpy
from bpy.props import *
from bpy.app.handlers import persistent
from mathutils import Vector, Matrix
import bgl
import blf
from bpy_extras.view3d_utils import location_3d_to_region_2d
from bpy_extras.mesh_utils import ngon_tessellate
# Precicion for display of float values.
PRECISION = 4
# Name of the custom properties as stored in the scene.
COLOR_LOCAL = (1.0, 0.5, 0.0, 0.8)
COLOR_GLOBAL = (0.5, 0.0, 1.0, 0.8)
# 3D View - text offset
OFFSET_LINE = 10 # Offset the text a bit to the right.
OFFSET_Y = 15 # Offset of the lines.
OFFSET_VALUE = 30 # Offset of value(s) from the text.
# 3D View - line width
LINE_WIDTH_XYZ = 1
LINE_WIDTH_DIST = 2
# Returns a tuple describing the current measuring system
# and formatting options.
# Returned data is meant to be passed to formatDistance().
# Original by Alessandro Sala (Feb, 12th 2012)
def getUnitsInfo():
scale = bpy.context.scene.unit_settings.scale_length
unit_system = bpy.context.scene.unit_settings.system
separate_units = bpy.context.scene.unit_settings.use_separate
if unit_system == 'METRIC':
scale_steps = ((1000, 'km'), (1, 'm'), (1 / 100, 'cm'),
(1 / 1000, 'mm'), (1 / 1000000, '\u00b5m'))
elif unit_system == 'IMPERIAL':
scale_steps = ((1760, 'mi'), (1, 'yd'), (1 / 3, '\''),
(1 / 36, '"'), (1 / 36000, 'thou'))
scale *= 1.0936133
else:
scale_steps = ((1, ' BU'),)
separate_units = False
return (scale, scale_steps, separate_units)
# Converts a distance from BU into the measuring system
# described by units_info.
# Original by Alessandro Sala (Feb, 12th 2012)
def convertDistance(val, units_info):
scale, scale_steps, separate_units = units_info
sval = val * scale
rsval = round(sval, PRECISION)
idx = 0
while idx < len(scale_steps) - 1:
if rsval >= scale_steps[idx][0]:
break
idx += 1
factor, suffix = scale_steps[idx]
sval /= factor
if not separate_units or idx == len(scale_steps) - 1:
dval = str(round(sval, PRECISION)) + suffix
else:
ival = int(sval)
dval = str(ival) + suffix
fval = sval - ival
idx += 1
while idx < len(scale_steps):
fval *= scale_steps[idx - 1][0] / scale_steps[idx][0]
if fval >= 1:
dval += ' ' \
+ str(round(fval, 1)) \
+ scale_steps[idx][1]
break
idx += 1
return dval
# Returns a single selected object.
# Returns None if more than one (or nothing) is selected.
# Note: Ignores the active object.
def getSingleObject():
if len(bpy.context.selected_objects) == 1:
return bpy.context.selected_objects[0]
return None
# Returns a list with 2 3D points (Vector) and a color (RGBA)
# depending on the current view mode and the selection.
def getMeasurePoints(context):
sce = context.scene
mode = context.mode
# Get a single selected object (or nothing).
obj = getSingleObject()
if mode == 'EDIT_MESH':
obj = context.active_object
if obj and obj.type == 'MESH' and obj.data:
# Get mesh data from Object.
mesh = obj.data
# Get the selected vertices.
# @todo: Better (more efficient) way to do this?
verts_selected = [v for v in mesh.vertices if v.select == 1]
if len(verts_selected) == 0:
# Nothing selected.
# We measure the distance from...
# local ... the object center to the 3D cursor.
# global ... the origin to the 3D cursor.
cur_loc = sce.cursor_location
obj_loc = obj.matrix_world.to_translation()
# Convert to local space, if needed.
if measureLocal(sce):
p1 = cur_loc
p2 = obj_loc
return (p1, p2, COLOR_GLOBAL)
else:
p1 = Vector((0.0, 0.0, 0.0))
p2 = cur_loc
return (p1, p2, COLOR_GLOBAL)
elif len(verts_selected) == 1:
# One vertex selected.
# We measure the distance from the
# selected vertex object to the 3D cursor.
cur_loc = sce.cursor_location
vert_loc = verts_selected[0].co.copy()
# Convert to local or global space.
if measureLocal(sce):
p1 = vert_loc
p2 = cur_loc
return (p1, p2, COLOR_LOCAL)
else:
p1 = obj.matrix_world * vert_loc
p2 = cur_loc
return (p1, p2, COLOR_GLOBAL)
elif len(verts_selected) == 2:
# Two vertices selected.
# We measure the distance between the
# two selected vertices.
obj_loc = obj.matrix_world.to_translation()
vert1_loc = verts_selected[0].co.copy()
vert2_loc = verts_selected[1].co.copy()
# Convert to local or global space.
if measureLocal(sce):
p1 = vert1_loc
p2 = vert2_loc
return (p1, p2, COLOR_LOCAL)
else:
p1 = obj.matrix_world * vert1_loc
p2 = obj.matrix_world * vert2_loc
return (p1, p2, COLOR_GLOBAL)
else:
return None
elif mode == 'OBJECT':
# We are working in object mode.
if len(context.selected_objects) > 2:
return None
elif len(context.selected_objects) == 2:
# 2 objects selected.
# We measure the distance between the 2 selected objects.
obj1, obj2 = context.selected_objects
obj1_loc = obj1.matrix_world.to_translation()
obj2_loc = obj2.matrix_world.to_translation()
return (obj1_loc, obj2_loc, COLOR_GLOBAL)
elif obj:
# One object selected.
# We measure the distance from the object to the 3D cursor.
cur_loc = sce.cursor_location
obj_loc = obj.matrix_world.to_translation()
return (obj_loc, cur_loc, COLOR_GLOBAL)
elif not context.selected_objects:
# Nothing selected.
# We measure the distance from the origin to the 3D cursor.
p1 = Vector((0.0, 0.0, 0.0))
p2 = sce.cursor_location
return (p1, p2, COLOR_GLOBAL)
else:
return None
# Return the length of an edge (in global space if "obj" is set).
# Respects the scaling (via the "obj.matrix_world" parameter).
def edgeLengthGlobal(edge, obj, globalSpace):
v1, v2 = edge.vertices
# Get vertex data
v1 = obj.data.vertices[v1]
v2 = obj.data.vertices[v2]
if globalSpace:
mat = obj.matrix_world
# Apply transform matrix to vertex coordinates.
v1 = mat * v1.co
v2 = mat * v2.co
else:
v1 = v1.co
v2 = v2.co
return (v1 - v2).length
# Calculate the edge length of a mesh object.
# *) Set selectedOnly=1 if you only want to count selected edges.
# *) Set globalSpace=1 if you want to calculate
# the global edge length (object mode).
# Note: Be sure you have updated the mesh data before
# running this with selectedOnly=1!
# @todo Support other object types (surfaces, etc...)?
def objectEdgeLength(obj, selectedOnly, globalSpace):
if obj and obj.type == 'MESH' and obj.data:
edgeTotal = 0
mesh = obj.data
# Count the length of all edges.
for ed in mesh.edges:
if not selectedOnly or ed.select:
edgeTotal += edgeLengthGlobal(ed, obj, globalSpace)
return edgeTotal
# We can not calculate a length for this object.
return -1
# Return the area of a face (in global space).
# @note Copies the functionality of the following functions,
# but also respects the scaling (via the "obj.matrix_world" parameter):
# @sa: rna_mesh.c:rna_MeshTessFace_area_get
# @sa: math_geom.c:area_quad_v3
# @sa: math_geom.c:area_tri_v3
# @sa: math_geom.c:area_poly_v3
# @todo Fix calculation of "n" for n-gons?
def polyAreaGlobal(poly, obj):
mesh = obj.data
mat = obj.matrix_world.copy()
norm = poly.normal
area = 0.0
if len(poly.vertices) > 3:
# Tesselate the polygon into multiple tris
tris = ngon_tessellate(mesh, poly.vertices)
for tri in tris:
# Get vertex data
v1, v2, v3 = tri
# Get indices from original poly
v1 = poly.vertices[v1]
v2 = poly.vertices[v2]
v3 = poly.vertices[v3]
# Get vertex information from indices
v1 = mesh.vertices[v1]
v2 = mesh.vertices[v2]
v3 = mesh.vertices[v3]
# Apply transform matrix to vertex coordinates.
v1 = mat * v1.co
v2 = mat * v2.co
v3 = mat * v3.co
# Calculate area for the new tri
vec1 = v3 - v2
vec2 = v1 - v2
n = vec1.cross(vec2)
area += n.length / 2.0
elif len(poly.vertices) == 3:
# Triangle
# Get vertex indices
v1, v2, v3 = poly.vertices
# Get vertex data
v1 = mesh.vertices[v1]
v2 = mesh.vertices[v2]
v3 = mesh.vertices[v3]
# Apply transform matrix to vertex coordinates.
v1 = mat * v1.co
v2 = mat * v2.co
v3 = mat * v3.co
vec1 = v3 - v2
vec2 = v1 - v2
n = vec1.cross(vec2)
area = n.length / 2.0
# Apply rotation and scale to the normal as well.
rot_mat = obj.matrix_world.to_quaternion()
scale = obj.matrix_world.to_scale()
norm = rot_mat * norm
norm = Vector((
norm.x * scale.x,
norm.y * scale.y,
norm.z * scale.z)).normalized()
return area, norm
# Calculate the surface area of a mesh object.
# *) Set selectedOnly=1 if you only want to count selected faces.
# *) Set globalSpace=1 if you want to calculate
# the global surface area (object mode).
# Note: Be sure you have updated the mesh data before
# running this with selectedOnly=1!
# @todo Support other object types (surfaces, etc...)?
def objectSurfaceArea(obj, selectedOnly, globalSpace):
if obj and obj.type == 'MESH' and obj.data:
areaTotal = 0
normTotal = Vector((0.0, 0.0, 0.0))
mesh = obj.data
# Count the area of all the faces.
for poly in mesh.polygons:
if not selectedOnly or poly.select:
if globalSpace:
a, n = polyAreaGlobal(poly, obj)
areaTotal += a
normTotal += n
else:
areaTotal += poly.area
normTotal += poly.normal
return areaTotal, normTotal
# We can not calculate an area for this object.
return -1, Vector((0.0, 0.0, 0.0))
# Calculate the volume of a mesh object.
# Copyright Loonsbury ([email protected])
def objectVolume(obj, globalSpace):
if obj and obj.type == 'MESH' and obj.data:
# Check if mesh is non-manifold
if not checkManifold(obj):
return -1
# Check if mesh has n-gons
if checkNgon(obj):
return -2
mesh = obj.data
volTot = 0
for poly in mesh.polygons:
fzn = poly.normal.z
if len(poly.vertices) == 4:
v1, v2, v3, v4 = poly.vertices
else:
v1, v2, v3 = poly.vertices
v1 = mesh.vertices[v1]
v2 = mesh.vertices[v2]
v3 = mesh.vertices[v3]
# Scaled vert coordinates with object XYZ offsets for
# selection extremes/sizing.
if globalSpace:
x1 = v1.co[0] * obj.scale[0] + obj.location[0]
y1 = v1.co[1] * obj.scale[1] + obj.location[1]
z1 = v1.co[2] * obj.scale[2] + obj.location[2]
x2 = v2.co[0] * obj.scale[0] + obj.location[0]
y2 = v2.co[1] * obj.scale[1] + obj.location[1]
z2 = v2.co[2] * obj.scale[2] + obj.location[2]
x3 = v3.co[0] * obj.scale[0] + obj.location[0]
y3 = v3.co[1] * obj.scale[1] + obj.location[1]
z3 = v3.co[2] * obj.scale[2] + obj.location[2]
else:
x1, y1, z1 = v1.co
x2, y2, z2 = v2.co
x3, y3, z3 = v3.co
pa = 0.5 * abs(
(x1 * (y3 - y2))
+ (x2 * (y1 - y3))
+ (x3 * (y2 - y1)))
volume = ((z1 + z2 + z3) / 3.0) * pa
# Allowing for quads
if len(poly.vertices) == 4:
# Get vertex data
v4 = mesh.vertices[v4]
if globalSpace:
x4 = v4.co[0] * obj.scale[0] + obj.location[0]
y4 = v4.co[1] * obj.scale[1] + obj.location[1]
z4 = v4.co[2] * obj.scale[2] + obj.location[2]
else:
x4, y4, z4 = v4.co
pa = 0.5 * abs(
(x1 * (y4 - y3))
+ (x3 * (y1 - y4))
+ (x4 * (y3 - y1)))
volume += ((z1 + z3 + z4) / 3.0) * pa
if fzn < 0:
fzn = -1
elif fzn > 0:
fzn = 1
else:
fzn = 0
volTot += fzn * volume
return volTot
# else:
# print obj.name, ': Object must be a mesh!' # TODO
return -3
# Manifold Checks
# Copyright Loonsbury ([email protected])
def checkManifold(obj):
if obj and obj.type == 'MESH' and obj.data:
mesh = obj.data
mc = dict([(ed.key, 0) for ed in mesh.edges]) # TODO
for p in mesh.polygons:
for ek in p.edge_keys:
mc[ek] += 1
if mc[ek] > 2:
return 0
mt = [e[1] for e in mc.items()]
mt.sort()
if mt[0] < 2:
return 0
if mt[len(mt) - 1] > 2:
return 0
return 1
else:
return -1
# Check if a mesh has n-gons (polygon with more than 4 edges).
def checkNgon(obj):
if obj and obj.type == 'MESH' and obj.data:
mesh = obj.data
for p in mesh.polygons:
if len(p.vertices) > 4:
return 1
return 0
else:
return -1
# User friendly access to the "space" setting.
def measureGlobal(sce):
return (sce.measure_panel_transform == "measure_global")
# User friendly access to the "space" setting.
def measureLocal(sce):
return (sce.measure_panel_transform == "measure_local")
# Calculate values if geometry, selection or cursor changed.
@persistent
def scene_update(context):
sce = context
mode = bpy.context.mode
if (mode == 'EDIT_MESH' and not sce.measure_panel_update):
return
if (bpy.data.objects.is_updated
or bpy.context.scene.is_updated
or sce.measure_panel_update):
# TODO: Better way to check selection changes and cursor changes?
sel_objs = bpy.context.selected_objects
# EDGE LENGTH
if sce.measure_panel_calc_edge_length:
if (mode == 'EDIT_MESH'
and sce.measure_panel_update):
sce.measure_panel_update = 0
obj = context.active_object
#if obj.is_updated:
length_total = objectEdgeLength(obj, True,
measureGlobal(sce))
sce.measure_panel_edge_length = length_total
elif mode == 'OBJECT':
length_total = -1
for o in sel_objs:
if o.type == 'MESH':
length = objectEdgeLength(o, False, measureGlobal(sce))
if length >= 0:
if length_total < 0:
length_total = 0
length_total += length
sce.measure_panel_edge_length = length_total
# AREA
# Handle mesh surface area calulations
if sce.measure_panel_calc_area:
if (mode == 'EDIT_MESH'
and sce.measure_panel_update):
sce.measure_panel_update = 0
obj = bpy.context.active_object
if obj and obj.type == 'MESH' and obj.data:
# "Note: a Mesh will return the selection state of the mesh
# when EditMode was last exited. A Python script operating
# in EditMode must exit EditMode before getting the current
# selection state of the mesh."
# http:https://www.blender.org/documentation/249PythonDoc/
# /Mesh.MVert-class.html#sel
# We can only provide this by existing &
# re-entering EditMode.
# @todo: Better way to do this?
# Get mesh data from Object.
me = obj.data
# Get transformation matrix from object.
ob_mat = obj.matrix_world
# Also make an inversed copy! of the matrix.
ob_mat_inv = ob_mat.copy()
Matrix.invert(ob_mat_inv)
# Get the selected vertices.
# @todo: Better (more efficient) way to do this?
verts_selected = [v for v in me.vertices if v.select == 1]
if len(verts_selected) >= 3:
# Get selected faces
# @todo: Better (more efficient) way to do this?
polys_selected = [p for p in me.polygons
if p.select == 1]
if len(polys_selected) > 0:
area, normal = objectSurfaceArea(obj, True,
measureGlobal(sce))
if area >= 0.0:
sce.measure_panel_area1 = area
sce.measure_panel_normal1 = normal
elif mode == 'OBJECT':
# We are working in object mode.
# Get a single selected object (or nothing).
obj = getSingleObject()
if len(sel_objs) > 2:
return
# @todo Make this work again.
# # We have more that 2 objects selected...
#
# mesh_objects = [o for o in context.selected_objects
# if o.type == 'MESH']
# if len(mesh_objects) > 0:
# # ... and at least one of them is a mesh.
#
# for o in mesh_objects:
# area = objectSurfaceArea(o, False,
# measureGlobal(sce))
# if area >= 0:
# #row.label(text=o.name, icon='OBJECT_DATA')
# #row.label(text=str(round(area, PRECISION))
# # + " BU^2")
elif len(sel_objs) == 2:
# 2 objects selected.
obj1, obj2 = sel_objs
# Calculate surface area of the objects.
area1, normal1 = objectSurfaceArea(obj1, False,
measureGlobal(sce))
area2, normal2 = objectSurfaceArea(obj2, False,
measureGlobal(sce))
sce.measure_panel_area1 = area1
sce.measure_panel_area2 = area2
sce.measure_panel_normal1 = normal1
sce.measure_panel_normal2 = normal2
elif obj:
# One object selected.
# Calculate surface area of the object.
area, normal = objectSurfaceArea(obj, False,
measureGlobal(sce))
sce.measure_panel_area1 = area
sce.measure_panel_normal1 = normal
# VOLUME
# Handle mesh volume calulations.
if sce.measure_panel_calc_volume:
obj = getSingleObject()
if mode == 'OBJECT':
# We are working in object mode.
#if len(sel_objs) > 2: # TODO
#el
if len(sel_objs) == 2:
# 2 objects selected.
obj1, obj2 = sel_objs
# Calculate surface area of the objects.
volume1 = objectVolume(obj1, measureGlobal(sce))
volume2 = objectVolume(obj2, measureGlobal(sce))
sce.measure_panel_volume1 = volume1
sce.measure_panel_volume2 = volume2
elif obj:
# One object selected.
# Calculate surface area of the object.
volume1 = objectVolume(obj, measureGlobal(sce))
sce.measure_panel_volume1 = volume1
def draw_measurements_callback(self, context):
sce = context.scene
draw = 0
if hasattr(sce, "measure_panel_draw"):
draw = sce.measure_panel_draw
# 2D drawing code example
#bgl.glBegin(bgl.GL_LINE_STRIP)
#bgl.glVertex2i(0, 0)
#bgl.glVertex2i(80, 100)
#bgl.glEnd()
if draw:
# Get measured 3D points and colors.
line = getMeasurePoints(context)
if line:
p1, p2, color = line
# Get & convert the Perspective Matrix of the current view/region.
view3d = bpy.context
region = view3d.region_data
perspMatrix = region.perspective_matrix
tempMat = [perspMatrix[j][i] for i in range(4) for j in range(4)]
perspBuff = bgl.Buffer(bgl.GL_FLOAT, 16, tempMat)
# ---
# Store previous OpenGL settings.
# Store MatrixMode
MatrixMode_prev = bgl.Buffer(bgl.GL_INT, [1])
bgl.glGetIntegerv(bgl.GL_MATRIX_MODE, MatrixMode_prev)
MatrixMode_prev = MatrixMode_prev[0]
# Store projection matrix
ProjMatrix_prev = bgl.Buffer(bgl.GL_DOUBLE, [16])
bgl.glGetFloatv(bgl.GL_PROJECTION_MATRIX, ProjMatrix_prev)
# Store Line width
lineWidth_prev = bgl.Buffer(bgl.GL_FLOAT, [1])
bgl.glGetFloatv(bgl.GL_LINE_WIDTH, lineWidth_prev)
lineWidth_prev = lineWidth_prev[0]
# Store GL_BLEND
blend_prev = bgl.Buffer(bgl.GL_BYTE, [1])
bgl.glGetFloatv(bgl.GL_BLEND, blend_prev)
blend_prev = blend_prev[0]
line_stipple_prev = bgl.Buffer(bgl.GL_BYTE, [1])
bgl.glGetFloatv(bgl.GL_LINE_STIPPLE, line_stipple_prev)
line_stipple_prev = line_stipple_prev[0]
# Store glColor4f
color_prev = bgl.Buffer(bgl.GL_FLOAT, [4])
bgl.glGetFloatv(bgl.GL_COLOR, color_prev)
# ---
# Prepare for 3D drawing
bgl.glLoadIdentity()
bgl.glMatrixMode(bgl.GL_PROJECTION)
bgl.glLoadMatrixf(perspBuff)
bgl.glEnable(bgl.GL_BLEND)
bgl.glEnable(bgl.GL_LINE_STIPPLE)
# ---
# Draw 3D stuff.
bgl.glLineWidth(LINE_WIDTH_XYZ)
# X
bgl.glColor4f(1, 0, 0, 0.8)
bgl.glBegin(bgl.GL_LINE_STRIP)
bgl.glVertex3f(p1[0], p1[1], p1[2])
bgl.glVertex3f(p2[0], p1[1], p1[2])
bgl.glEnd()
# Y
bgl.glColor4f(0, 1, 0, 0.8)
bgl.glBegin(bgl.GL_LINE_STRIP)
bgl.glVertex3f(p1[0], p1[1], p1[2])
bgl.glVertex3f(p1[0], p2[1], p1[2])
bgl.glEnd()
# Z
bgl.glColor4f(0, 0, 1, 0.8)
bgl.glBegin(bgl.GL_LINE_STRIP)
bgl.glVertex3f(p1[0], p1[1], p1[2])
bgl.glVertex3f(p1[0], p1[1], p2[2])
bgl.glEnd()
# Dist
bgl.glLineWidth(LINE_WIDTH_DIST)
bgl.glColor4f(color[0], color[1], color[2], color[3])
bgl.glBegin(bgl.GL_LINE_STRIP)
bgl.glVertex3f(p1[0], p1[1], p1[2])
bgl.glVertex3f(p2[0], p2[1], p2[2])
bgl.glEnd()
# ---
# Restore previous OpenGL settings
bgl.glLoadIdentity()
bgl.glMatrixMode(MatrixMode_prev)
bgl.glLoadMatrixf(ProjMatrix_prev)
bgl.glLineWidth(lineWidth_prev)
if not blend_prev:
bgl.glDisable(bgl.GL_BLEND)
if not line_stipple_prev:
bgl.glDisable(bgl.GL_LINE_STIPPLE)
bgl.glColor4f(
color_prev[0],
color_prev[1],
color_prev[2],
color_prev[3])
# ---
# Draw (2D) text
# We do this after drawing the lines so
# we can draw it OVER the line.
coord_2d = location_3d_to_region_2d(
context.region,
context.space_data.region_3d,
p1.lerp(p2, 0.5))
dist = (p1 - p2).length
# Write distance value into the scene property,
# so we can display it in the panel & refresh the panel.
if hasattr(sce, "measure_panel_dist"):
sce.measure_panel_dist = dist
context.area.tag_redraw()
texts = [
("Dist:", dist),
("X:", abs(p1[0] - p2[0])),
("Y:", abs(p1[1] - p2[1])),
("Z:", abs(p1[2] - p2[2]))]
# Draw all texts
# @todo Get user pref for text color in 3D View
bgl.glColor4f(1.0, 1.0, 1.0, 1.0)
blf.size(0, 12, 72) # Prevent font size to randomly change.
uinfo = getUnitsInfo()
loc_x = coord_2d[0] + OFFSET_LINE
loc_y = coord_2d[1]
for t in texts:
text = t[0]
value = convertDistance(t[1], uinfo)
blf.position(0, loc_x, loc_y, 0)
blf.draw(0, text)
blf.position(0, loc_x + OFFSET_VALUE, loc_y, 0)
blf.draw(0, value)
loc_y -= OFFSET_Y
class VIEW3D_OT_display_measurements(bpy.types.Operator):
"""Display the measurements made in the 'Measure' panel"""
bl_idname = "view3d.display_measurements"
bl_label = "Display the measurements made in the" \
" 'Measure' panel in the 3D View"
bl_options = {'REGISTER'}
def modal(self, context, event):
context.area.tag_redraw()
return {'FINISHED'}
def execute(self, context):
if context.area.type == 'VIEW_3D':
mgr_ops = context.window_manager.operators.values()
if not self.bl_idname in [op.bl_idname for op in mgr_ops]:
# Add the region OpenGL drawing callback
for WINregion in context.area.regions:
if WINregion.type == 'WINDOW':
context.window_manager.modal_handler_add(self)
self._handle = WINregion.callback_add(
draw_measurements_callback,
(self, context),
'POST_PIXEL')
print("Measure panel display callback added")
return {'RUNNING_MODAL'}
return {'CANCELLED'}
else:
self.report({'WARNING'}, "View3D not found, cannot run operator")
return {'CANCELLED'}
class VIEW3D_OT_activate_measure_panel(bpy.types.Operator):
bl_label = "Activate"
bl_idname = "view3d.activate_measure_panel"
bl_description = "Activate the callback needed to draw the lines"
bl_options = {'REGISTER'}
def invoke(self, context, event):
# Execute operator (this adds the callback)
# if it wasn't done yet.
bpy.ops.view3d.display_measurements()
return {'FINISHED'}
class VIEW3D_OT_reenter_editmode(bpy.types.Operator):
bl_label = "Re-enter EditMode"
bl_idname = "view3d.reenter_editmode"
bl_description = "Update mesh data of an active mesh object " \
"(this is done by exiting and re-entering mesh edit mode)"
bl_options = {'REGISTER'}
def invoke(self, context, event):
# Get the active object.
obj = context.active_object
sce = context.scene
if obj and obj.type == 'MESH' and context.mode == 'EDIT_MESH':
# Exit and re-enter mesh EditMode.
bpy.ops.object.mode_set(mode='OBJECT')
bpy.ops.object.mode_set(mode='EDIT')
sce.measure_panel_update = 1
return {'FINISHED'}
return {'CANCELLED'}
class VIEW3D_PT_measure(bpy.types.Panel):
bl_space_type = 'VIEW_3D'
bl_region_type = 'UI'
bl_label = "Measure"
bl_options = {'DEFAULT_CLOSED'}
@classmethod
def poll(cls, context):
# Only display this panel in the object and edit mode 3D view.
mode = context.mode
if (context.area.type == 'VIEW_3D' and
(mode == 'EDIT_MESH' or mode == 'OBJECT')):
return 1
return 0
def draw_header(self, context):
layout = self.layout
sce = context.scene
mgr_ops = context.window_manager.operators.values()
if (not "VIEW3D_OT_display_measurements"