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
|
# ##### 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8 compliant>
#for full docs see...
# http://mediawiki.blender.org/index.php/Scripts/Manual/UV_Calculate/Follow_active_quads
import bpy
def extend(obj, operator, EXTEND_MODE):
me = obj.data
me_verts = me.verts
# script will fail without UVs
if not me.active_uv_texture:
me.add_uv_texture()
# Toggle Edit mode
is_editmode = (obj.mode == 'EDIT')
if is_editmode:
bpy.ops.object.mode_set(mode='OBJECT')
#t = sys.time()
edge_average_lengths = {}
OTHER_INDEX = 2, 3, 0, 1
FAST_INDICIES = 0, 2, 1, 3 # order is faster
def extend_uvs(face_source, face_target, edge_key):
'''
Takes 2 faces,
Projects its extends its UV coords onto the face next to it.
Both faces must share an edge.
'''
def face_edge_vs(vi):
# assume a quad
return [(vi[0], vi[1]), (vi[1], vi[2]), (vi[2], vi[3]), (vi[3], vi[0])]
vidx_source = face_source.verts
vidx_target = face_target.verts
faceUVsource = me.active_uv_texture.data[face_source.index]
uvs_source = [faceUVsource.uv1, faceUVsource.uv2, faceUVsource.uv3, faceUVsource.uv4]
faceUVtarget = me.active_uv_texture.data[face_target.index]
uvs_target = [faceUVtarget.uv1, faceUVtarget.uv2, faceUVtarget.uv3, faceUVtarget.uv4]
# vertex index is the key, uv is the value
uvs_vhash_source = dict([(vindex, uvs_source[i]) for i, vindex in enumerate(vidx_source)])
uvs_vhash_target = dict([(vindex, uvs_target[i]) for i, vindex in enumerate(vidx_target)])
edge_idxs_source = face_edge_vs(vidx_source)
edge_idxs_target = face_edge_vs(vidx_target)
source_matching_edge = -1
target_matching_edge = -1
edge_key_swap = edge_key[1], edge_key[0]
try:
source_matching_edge = edge_idxs_source.index(edge_key)
except:
source_matching_edge = edge_idxs_source.index(edge_key_swap)
try:
target_matching_edge = edge_idxs_target.index(edge_key)
except:
target_matching_edge = edge_idxs_target.index(edge_key_swap)
edgepair_inner_source = edge_idxs_source[source_matching_edge]
edgepair_inner_target = edge_idxs_target[target_matching_edge]
edgepair_outer_source = edge_idxs_source[OTHER_INDEX[source_matching_edge]]
edgepair_outer_target = edge_idxs_target[OTHER_INDEX[target_matching_edge]]
if edge_idxs_source[source_matching_edge] == edge_idxs_target[target_matching_edge]:
iA = 0 # Flipped, most common
iB = 1
else: # The normals of these faces must be different
iA = 1
iB = 0
# Set the target UV's touching source face, no tricky calc needed,
uvs_vhash_target[edgepair_inner_target[0]][:] = uvs_vhash_source[edgepair_inner_source[iA]]
uvs_vhash_target[edgepair_inner_target[1]][:] = uvs_vhash_source[edgepair_inner_source[iB]]
# Set the 2 UV's on the target face that are not touching
# for this we need to do basic expaning on the source faces UV's
if EXTEND_MODE == 'LENGTH':
try: # divide by zero is possible
'''
measure the length of each face from the middle of each edge to the opposite
allong the axis we are copying, use this
'''
i1a = edgepair_outer_target[iB]
i2a = edgepair_inner_target[iA]
if i1a > i2a:
i1a, i2a = i2a, i1a
i1b = edgepair_outer_source[iB]
i2b = edgepair_inner_source[iA]
if i1b > i2b:
i1b, i2b = i2b, i1b
# print edge_average_lengths
factor = edge_average_lengths[i1a, i2a][0] / edge_average_lengths[i1b, i2b][0]
except:
# Div By Zero?
factor = 1.0
uvs_vhash_target[edgepair_outer_target[iB]][:] = uvs_vhash_source[edgepair_inner_source[0]] + factor * (uvs_vhash_source[edgepair_inner_source[0]] - uvs_vhash_source[edgepair_outer_source[1]])
uvs_vhash_target[edgepair_outer_target[iA]][:] = uvs_vhash_source[edgepair_inner_source[1]] + factor * (uvs_vhash_source[edgepair_inner_source[1]] - uvs_vhash_source[edgepair_outer_source[0]])
else:
# same as above but with no factors
uvs_vhash_target[edgepair_outer_target[iB]][:] = uvs_vhash_source[edgepair_inner_source[0]] + (uvs_vhash_source[edgepair_inner_source[0]] - uvs_vhash_source[edgepair_outer_source[1]])
uvs_vhash_target[edgepair_outer_target[iA]][:] = uvs_vhash_source[edgepair_inner_source[1]] + (uvs_vhash_source[edgepair_inner_source[1]] - uvs_vhash_source[edgepair_outer_source[0]])
if me.active_uv_texture == None:
me.add_uv_texture
face_act = me.faces.active
if face_act == -1:
operator.report({'ERROR'}, "No active face.")
return
face_sel = [f for f in me.faces if len(f.verts) == 4 and f.selected]
face_act_local_index = -1
for i, f in enumerate(face_sel):
if f.index == face_act:
face_act_local_index = i
break
if face_act_local_index == -1:
operator.report({'ERROR'}, "Active face not selected.")
return
# Modes
# 0 unsearched
# 1:mapped, use search from this face. - removed!!
# 2:all siblings have been searched. dont search again.
face_modes = [0] * len(face_sel)
face_modes[face_act_local_index] = 1 # extend UV's from this face.
# Edge connectivty
edge_faces = {}
for i, f in enumerate(face_sel):
for edkey in f.edge_keys:
try:
edge_faces[edkey].append(i)
except:
edge_faces[edkey] = [i]
#SEAM = me.edges.seam
if EXTEND_MODE == 'LENGTH':
edge_loops = me.edge_loops(face_sel, [ed.key for ed in me.edges if ed.seam])
me_verts = me.verts
for loop in edge_loops:
looplen = [0.0]
for ed in loop:
edge_average_lengths[ed] = looplen
looplen[0] += (me_verts[ed[0]].co - me_verts[ed[1]].co).length
looplen[0] = looplen[0] / len(loop)
# remove seams, so we dont map accross seams.
for ed in me.edges:
if ed.seam:
# remove the edge pair if we can
try:
del edge_faces[ed.key]
except:
pass
# Done finding seams
# face connectivity - faces around each face
# only store a list of indicies for each face.
face_faces = [[] for i in range(len(face_sel))]
for edge_key, faces in edge_faces.items():
if len(faces) == 2: # Only do edges with 2 face users for now
face_faces[faces[0]].append((faces[1], edge_key))
face_faces[faces[1]].append((faces[0], edge_key))
# Now we know what face is connected to what other face, map them by connectivity
ok = True
while ok:
ok = False
for i in range(len(face_sel)):
if face_modes[i] == 1: # searchable
for f_sibling, edge_key in face_faces[i]:
if face_modes[f_sibling] == 0:
face_modes[f_sibling] = 1 # mapped and search from.
extend_uvs(face_sel[i], face_sel[f_sibling], edge_key)
face_modes[i] = 1 # we can map from this one now.
ok = True # keep searching
face_modes[i] = 2 # dont search again
if is_editmode:
bpy.ops.object.mode_set(mode='EDIT')
else:
me.update()
def main(context, operator):
obj = context.active_object
extend(obj, operator, operator.properties.mode)
class FollowActiveQuads(bpy.types.Operator):
'''Follow UVs from active quads along continuous face loops.'''
bl_idname = "uv.follow_active_quads"
bl_label = "Follow Active Quads"
bl_register = True
bl_undo = True
mode = bpy.props.EnumProperty(items=(("EVEN", "Client", "Space all UVs evently"), ("LENGTH", "Length", "Average space UVs edge length of each loop.")),
name="Edge Length Mode",
description="Method to space UV edge loops",
default="LENGTH")
def poll(self, context):
obj = context.active_object
return (obj is not None and obj.type == 'MESH')
def execute(self, context):
main(context, self)
return {'FINISHED'}
bpy.types.register(FollowActiveQuads)
# Add to a menu
menu_func = (lambda self, context: self.layout.operator(FollowActiveQuads.bl_idname))
bpy.types.VIEW3D_MT_uv_map.append(menu_func)
if __name__ == '__main__':
bpy.ops.uv.follow_active_quads()
|