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
|
#!BPY
"""
Name: 'Self Shadow VCols (AO)...'
Blender: 245
Group: 'VertexPaint'
Tooltip: 'Generate Fake Ambient Occlusion with vertex colors.'
"""
__author__ = "Campbell Barton aka ideasman42"
__url__ = ["www.blender.org", "blenderartists.org", "www.python.org"]
__version__ = "0.1"
__bpydoc__ = """\
Self Shadow
This usript uses the angles between faces to shade the mesh,
and optionaly blur the shading to remove artifacts from spesific edges.
"""
# ***** BEGIN GPL LICENSE BLOCK *****
#
# Script copyright (C) Campbell J Barton
#
# 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 LICENCE BLOCK *****
# --------------------------------------------------------------------------
from Blender import Scene, Draw, sys, Window, Mathutils, Mesh
import bpy
import BPyMesh
def vertexFakeAO(me, PREF_BLUR_ITERATIONS, PREF_BLUR_STRENGTH, PREF_CLAMP_CONCAVE, PREF_CLAMP_CONVEX, PREF_SHADOW_ONLY, PREF_SEL_ONLY):
Window.WaitCursor(1)
Ang= Mathutils.AngleBetweenVecs
BPyMesh.meshCalcNormals(me)
vert_tone= [0.0] * len(me.verts)
vert_tone_count= [0] * len(me.verts)
min_tone=0
max_tone=0
for i, f in enumerate(me.faces):
fc= f.cent
fno = f.no
for v in f.v:
vno=v.no # get a scaled down normal.
dot= vno.dot(v.co) - vno.dot(fc)
vert_tone_count[v.index]+=1
try:
a= Ang(vno, fno)
except:
continue
# Convex
if dot>0:
a= min(PREF_CLAMP_CONVEX, a)
if not PREF_SHADOW_ONLY:
vert_tone[v.index] += a
else:
a= min(PREF_CLAMP_CONCAVE, a)
vert_tone[v.index] -= a
# average vert_tone_list into vert_tonef
for i, tones in enumerate(vert_tone):
if vert_tone_count[i]:
vert_tone[i] = vert_tone[i] / vert_tone_count[i]
# Below we use edges to blur along so the edges need counting, not the faces
vert_tone_count= [0] * len(me.verts)
for ed in me.edges:
vert_tone_count[ed.v1.index] += 1
vert_tone_count[ed.v2.index] += 1
# Blur tone
blur = PREF_BLUR_STRENGTH
blur_inv = 1.0 - PREF_BLUR_STRENGTH
for i in xrange(PREF_BLUR_ITERATIONS):
# backup the original tones
orig_vert_tone= list(vert_tone)
for ed in me.edges:
i1= ed.v1.index
i2= ed.v2.index
val1= (orig_vert_tone[i2]*blur) + (orig_vert_tone[i1]*blur_inv)
val2= (orig_vert_tone[i1]*blur) + (orig_vert_tone[i2]*blur_inv)
# Apply the ton divided by the number of faces connected
vert_tone[i1]+= val1 / max(vert_tone_count[i1], 1)
vert_tone[i2]+= val2 / max(vert_tone_count[i2], 1)
min_tone= min(vert_tone)
max_tone= max(vert_tone)
#print min_tone, max_tone
tone_range= max_tone-min_tone
if max_tone==min_tone:
return
for f in me.faces:
if not PREF_SEL_ONLY or f.sel:
f_col= f.col
for i, v in enumerate(f):
col= f_col[i]
tone= vert_tone[v.index]
tone= (tone-min_tone)/tone_range
col.r= int(tone*col.r)
col.g= int(tone*col.g)
col.b= int(tone*col.b)
Window.WaitCursor(0)
def main():
sce= bpy.data.scenes.active
ob= sce.objects.active
if not ob or ob.type != 'Mesh':
Draw.PupMenu('Error, no active mesh object, aborting.')
return
me= ob.getData(mesh=1)
PREF_BLUR_ITERATIONS= Draw.Create(1)
PREF_BLUR_STRENGTH= Draw.Create(0.5)
PREF_CLAMP_CONCAVE= Draw.Create(90)
PREF_CLAMP_CONVEX= Draw.Create(20)
PREF_SHADOW_ONLY= Draw.Create(0)
PREF_SEL_ONLY= Draw.Create(0)
pup_block= [\
'Post AO Blur',\
('Strength:', PREF_BLUR_STRENGTH, 0, 1, 'Blur strength per iteration'),\
('Iterations:', PREF_BLUR_ITERATIONS, 0, 40, 'Number times to blur the colors. (higher blurs more)'),\
'Angle Clipping',\
('Highlight Angle:', PREF_CLAMP_CONVEX, 0, 180, 'Less then 180 limits the angle used in the tonal range.'),\
('Shadow Angle:', PREF_CLAMP_CONCAVE, 0, 180, 'Less then 180 limits the angle used in the tonal range.'),\
('Shadow Only', PREF_SHADOW_ONLY, 'Dont calculate highlights for convex areas.'),\
('Sel Faces Only', PREF_SEL_ONLY, 'Only apply to UV/Face selected faces (mix vpain/uvface select).'),\
]
if not Draw.PupBlock('SelfShadow...', pup_block):
return
if not me.vertexColors:
me.vertexColors= 1
t= sys.time()
vertexFakeAO(me, PREF_BLUR_ITERATIONS.val, \
PREF_BLUR_STRENGTH.val, \
PREF_CLAMP_CONCAVE.val, \
PREF_CLAMP_CONVEX.val, \
PREF_SHADOW_ONLY.val, \
PREF_SEL_ONLY.val)
if ob.modifiers:
me.update()
print 'done in %.6f' % (sys.time()-t)
if __name__=='__main__':
main()
|
