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
|
# ##### 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 #####
#---------------------------- LATTICE ALONG SURFACE ---------------------------#
#--------------------------------- version 0.3 --------------------------------#
# #
# Automatically generate and assign a lattice that follows the active surface. #
# #
# (c) Alessandro Zomparelli #
# (2017) #
# #
# http://www.co-de-it.com/ #
# #
################################################################################
import bpy, bmesh
from mathutils import Vector, Matrix
bl_info = {
"name": "Lattice",
"author": "Alessandro Zomparelli (Co-de-iT)",
"version": (0, 3),
"blender": (2, 7, 8),
"location": "",
"description": "Generate a Lattice based on a grid mesh",
"warning": "",
"wiki_url": "",
"tracker_url": "",
"category": "Mesh"}
def not_in(element, grid):
output = True
for loop in grid:
if element in loop:
output = False
break
return output
def grid_from_mesh(mesh, swap_uv):
bm = bmesh.new()
bm.from_mesh(mesh)
verts_grid = []
edges_grid = []
faces_grid = []
running_grid = True
while running_grid:
verts_loop = []
edges_loop = []
faces_loop = []
# storing first point
verts_candidates = []
if len(faces_grid) == 0: verts_candidates = bm.verts # for first loop check all vertices
else: verts_candidates = [v for v in bm.faces[faces_grid[-1][0]].verts if not_in(v.index, verts_grid)] # for other loops start form the vertices of the first face the last loop, skipping already used vertices
# check for last loop
is_last = False
for vert in verts_candidates:
if len(vert.link_faces) == 1: # check if corner vertex
vert.select = True
verts_loop.append(vert.index)
is_last = True
break
if not is_last:
for vert in verts_candidates:
new_link_faces = [f for f in vert.link_faces if not_in(f.index, faces_grid)]
if len(new_link_faces) < 2: # check if corner vertex
vert.select = True
verts_loop.append(vert.index)
break
running_loop = len(verts_loop) > 0
while running_loop:
bm.verts.ensure_lookup_table()
id = verts_loop[-1]
link_edges = bm.verts[id].link_edges
# storing second point
if len(verts_loop) == 1: # only one vertex stored in the loop
if len(faces_grid) == 0: ### first loop ###
edge = link_edges[swap_uv] # chose direction
for vert in edge.verts:
if vert.index != id:
vert.select = True
verts_loop.append(vert.index) # new vertex
edges_loop.append(edge.index) # chosen edge
faces_loop.append(edge.link_faces[0].index) # only one face
#edge.link_faces[0].select = True
else: ### other loops ###
for edge in bm.faces[faces_grid[-1][0]].edges: # start from the edges of the first face of the last loop
if bm.verts[verts_loop[0]] in edge.verts and bm.verts[verts_grid[-1][0]] not in edge.verts: # chose an edge starting from the first vertex that is not returning back
for vert in edge.verts:
if vert.index != id:
vert.select = True
verts_loop.append(vert.index)
edges_loop.append(edge.index)
for face in edge.link_faces:
if not_in(face.index,faces_grid):
faces_loop.append(face.index)
# continuing the loop
else:
for edge in link_edges:
for vert in edge.verts:
store_data = False
if not_in(vert.index, verts_grid) and vert.index not in verts_loop:
if len(faces_loop) > 0:
bm.faces.ensure_lookup_table()
if vert not in bm.faces[faces_loop[-1]].verts: store_data = True
else:
store_data = True
if store_data:
vert.select = True
verts_loop.append(vert.index)
edges_loop.append(edge.index)
for face in edge.link_faces:
if not_in(face.index, faces_grid):
faces_loop.append(face.index)
break
# ending condition
if verts_loop[-1] == id or verts_loop[-1] == verts_loop[0]: running_loop = False
verts_grid.append(verts_loop)
edges_grid.append(edges_loop)
faces_grid.append(faces_loop)
if len(faces_loop) == 0: running_grid = False
return verts_grid, edges_grid, faces_grid
class lattice_along_surface(bpy.types.Operator):
bl_idname = "object.lattice_along_surface"
bl_label = "Lattice along Surface"
bl_description = ("Automatically add a Lattice modifier to the selected "
"object, adapting it to the active one.\nThe active "
"object must be a rectangular grid compatible with the "
"Lattice's topology.")
bl_options = {'REGISTER', 'UNDO'}
set_parent = bpy.props.BoolProperty(
name="Set Parent", default=True,
description="Automatically set the Lattice as parent")
flipNormals = bpy.props.BoolProperty(
name="Flip Normals", default=False,
description="Flip normals direction")
swapUV = bpy.props.BoolProperty(
name="Swap UV", default=False,
description="Flip grid's U and V")
flipU = bpy.props.BoolProperty(
name="Flip U", default=False,
description="Flip grid's U")
flipV = bpy.props.BoolProperty(
name="Flip V", default=False,
description="Flip grid's V")
flipW = bpy.props.BoolProperty(
name="Flip W", default=False,
description="Flip grid's W")
use_groups = bpy.props.BoolProperty(
name="Vertex Group", default=False,
description="Use active Vertex Group for lattice's thickness")
high_quality_lattice = bpy.props.BoolProperty(
name="High quality", default=True,
description="Increase the the subdivisions in normal direction for a "
"more correct result")
hide_lattice = bpy.props.BoolProperty(
name="Hide Lattice", default=True,
description="Automatically hide the Lattice object")
scale_x = bpy.props.FloatProperty(
name="Scale X", default=1, min=0.001,
max=1, description="Object scale")
scale_y = bpy.props.FloatProperty(
name="Scale Y", default=1, min=0.001,
max=1, description="Object scale")
scale_z = bpy.props.FloatProperty(
name="Scale Z", default=1, min=0.001,
max=1, description="Object scale")
thickness = bpy.props.FloatProperty(
name="Thickness", default=1, soft_min=0,
soft_max=5, description="Lattice thickness")
displace = bpy.props.FloatProperty(
name="Displace", default=0, soft_min=-1,
soft_max=1, description="Lattice displace")
def draw(self, context):
layout = self.layout
col = layout.column(align=True)
col.label(text="Thickness:")
col.prop(
self, "thickness", text="Thickness", icon='NONE', expand=False,
slider=True, toggle=False, icon_only=False, event=False,
full_event=False, emboss=True, index=-1)
col.prop(
self, "displace", text="Offset", icon='NONE', expand=False,
slider=True, toggle=False, icon_only=False, event=False,
full_event=False, emboss=True, index=-1)
row = col.row()
row.prop(self, "use_groups")
col.separator()
col.label(text="Scale:")
col.prop(
self, "scale_x", text="U", icon='NONE', expand=False,
slider=True, toggle=False, icon_only=False, event=False,
full_event=False, emboss=True, index=-1)
col.prop(
self, "scale_y", text="V", icon='NONE', expand=False,
slider=True, toggle=False, icon_only=False, event=False,
full_event=False, emboss=True, index=-1)
'''
col.prop(
self, "scale_z", text="W", icon='NONE', expand=False,
slider=True, toggle=False, icon_only=False, event=False,
full_event=False, emboss=True, index=-1)
'''
col.separator()
col.label(text="Flip:")
row = col.row()
row.prop(self, "flipU", text="U")
row.prop(self, "flipV", text="V")
row.prop(self, "flipW", text="W")
col.prop(self, "swapUV")
col.prop(self, "flipNormals")
col.separator()
col.label(text="Lattice Options:")
col.prop(self, "high_quality_lattice")
col.prop(self, "hide_lattice")
col.prop(self, "set_parent")
def execute(self, context):
if len(bpy.context.selected_objects) != 2:
self.report({'ERROR'}, "Please, select two objects")
return {'CANCELLED'}
grid_obj = bpy.context.active_object
if grid_obj.type not in ('MESH', 'CURVE', 'SURFACE'):
self.report({'ERROR'}, "The surface object is not valid. Only Mesh,"
"Curve and Surface objects are allowed.")
return {'CANCELLED'}
obj = None
for o in bpy.context.selected_objects:
if o.name != grid_obj.name and o.type in ('MESH', 'CURVE', \
'SURFACE', 'FONT'):
obj = o
o.select = False
break
try:
obj_dim = obj.dimensions
obj_me = obj.to_mesh(bpy.context.scene, apply_modifiers=True,
settings = 'PREVIEW')
except:
self.report({'ERROR'}, "The object to deform is not valid. Only "
"Mesh, Curve, Surface and Font objects are allowed.")
return {'CANCELLED'}
bpy.ops.object.duplicate_move()
grid_obj = bpy.context.active_object
bpy.ops.object.transform_apply(location=True, rotation=True, scale=True)
grid_mesh = grid_obj.to_mesh(bpy.context.scene, apply_modifiers=True,
settings = 'PREVIEW')
if len(grid_mesh.polygons) > 64*64:
bpy.ops.object.delete(use_global=False)
bpy.context.scene.objects.active = obj
obj.select = True
self.report({'ERROR'}, "Maximum resolution allowed for Lattice is 64")
return {'CANCELLED'}
# CREATING LATTICE
min = Vector((0,0,0))
max = Vector((0,0,0))
first = True
for v in obj_me.vertices:
vert = obj.matrix_world * v.co
if vert[0] < min[0] or first:
min[0] = vert[0]
if vert[1] < min[1] or first:
min[1] = vert[1]
if vert[2] < min[2] or first:
min[2] = vert[2]
if vert[0] > max[0] or first:
max[0] = vert[0]
if vert[1] > max[1] or first:
max[1] = vert[1]
if vert[2] > max[2] or first:
max[2] = vert[2]
first = False
bb = max-min
lattice_loc = (max+min)/2
bpy.ops.object.add(type='LATTICE', view_align=False,
enter_editmode=False)
lattice = bpy.context.active_object
lattice.location = lattice_loc
lattice.scale = Vector((bb.x/self.scale_x, bb.y/self.scale_y,
bb.z/self.scale_z))
if bb.x == 0: lattice.scale.x = 1
if bb.y == 0: lattice.scale.y = 1
if bb.z == 0: lattice.scale.z = 1
bpy.context.scene.objects.active = obj
bpy.ops.object.modifier_add(type='LATTICE')
obj.modifiers[-1].object = lattice
# set as parent
if self.set_parent:
obj.select = True
lattice.select = True
bpy.context.scene.objects.active = lattice
bpy.ops.object.parent_set(type='LATTICE')
# reading grid structure
verts_grid, edges_grid, faces_grid = grid_from_mesh(grid_mesh,
swap_uv=self.swapUV)
nu = len(verts_grid)
nv = len(verts_grid[0])
nw = 2
scale_normal = self.thickness
try:
lattice.data.points_u = nu
lattice.data.points_v = nv
lattice.data.points_w = nw
for i in range(nu):
for j in range(nv):
for w in range(nw):
if self.use_groups:
try:
displace = grid_obj.vertex_groups.active.weight(verts_grid[i][j])*scale_normal*bb.z
except:
displace = scale_normal*bb.z
else: displace = scale_normal*bb.z
target_point = (grid_mesh.vertices[verts_grid[i][j]].co + grid_mesh.vertices[verts_grid[i][j]].normal*(w + self.displace/2 - 0.5)*displace) - lattice.location
if self.flipW: w = 1-w
if self.flipU: i = nu-i-1
if self.flipV: j = nv-j-1
lattice.data.points[i + j*nu + w*nu*nv].co_deform.x = target_point.x / bpy.data.objects[lattice.name].scale.x
lattice.data.points[i + j*nu + w*nu*nv].co_deform.y = target_point.y / bpy.data.objects[lattice.name].scale.y
lattice.data.points[i + j*nu + w*nu*nv].co_deform.z = target_point.z / bpy.data.objects[lattice.name].scale.z
except:
bpy.ops.object.mode_set(mode='OBJECT')
grid_obj.select = True
lattice.select = True
obj.select = False
bpy.ops.object.delete(use_global=False)
bpy.context.scene.objects.active = obj
obj.select = True
bpy.ops.object.modifier_remove(modifier=obj.modifiers[-1].name)
if nu > 64 or nv > 64:
self.report({'ERROR'}, "Maximum resolution allowed for Lattice is 64")
return {'CANCELLED'}
else:
self.report({'ERROR'}, "The grid mesh is not correct")
return {'CANCELLED'}
#grid_obj.data = old_grid_data
#print(old_grid_matrix)
#grid_obj.matrix_world = old_grid_matrix
bpy.ops.object.mode_set(mode='OBJECT')
grid_obj.select = True
lattice.select = False
obj.select = False
bpy.ops.object.delete(use_global=False)
bpy.context.scene.objects.active = lattice
lattice.select = True
if self.high_quality_lattice: bpy.context.object.data.points_w = 8
else: bpy.context.object.data.use_outside = True
if self.hide_lattice:
bpy.ops.object.hide_view_set(unselected=False)
bpy.context.scene.objects.active = obj
obj.select = True
lattice.select = False
if self.flipNormals:
try:
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_all(action='SELECT')
bpy.ops.mesh.flip_normals()
bpy.ops.object.mode_set(mode='OBJECT')
except:
pass
return {'FINISHED'}
'''
class lattice_along_surface_panel(bpy.types.Panel):
bl_label = "Modifiers Tools"
bl_category = "Tools"
bl_space_type = "VIEW_3D"
bl_region_type = "TOOLS"
bl_context = (("objectmode"))
def draw(self, context):
layout = self.layout
col = layout.column(align=True)
try:
col.operator("object.lattice_along_surface", icon="MOD_LATTICE")
except:
pass
'''
def register():
bpy.utils.register_class(lattice_along_surface)
#bpy.utils.register_class(lattice_along_surface_panel)
def unregister():
bpy.utils.unregister_class(lattice_along_surface)
#bpy.utils.unregister_class(lattice_along_surface_panel)
if __name__ == "__main__":
register()
|