uv_bake_texture_to_vcols.py

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   3 #  This program is free software; you can redistribute it and/or
   4 #  modify it under the terms of the GNU General Public License
   5 #  as published by the Free Software Foundation; either version 2
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  15 #  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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  17 # ##### END GPL LICENSE BLOCK #####
  18
  19 # <pep8 compliant>
  20
  21 """
  22 Bake UV-Texture to Vertex Colors Addon
  23
  24 Contact:        p_boelens@msn.com
  25 Information:    https://developer.blender.org/T28211
  26
  27 Contributor(s): Patrick Boelens, CoDEmanX.
  28
  29 All rights reserved.
  30 """
  31
  32 bl_info = {
  33     "name": "Bake UV-Texture to Vertex Colors",
  34     "description": "Bakes the colors of the active UV Texture "
  35         "to a Vertex Color layer.",
  36     "author": "Patrick Boelens, CoDEmanX",
  37     "version": (0, 6),
  38     "blender": (2, 63, 0),
  39     "location": "3D View > Vertex Paint > Toolshelf > Bake",
  40     "warning": "Requires image texture, generated textures aren't supported.",
  41     "wiki_url": "http://wiki.blender.org/index.php?title=Extensions:2.6/Py/"
  42                 "Scripts/UV/Bake_Texture_to_Vertex_Colors",
  43     "category": "UV",
  44 }
  45
  46 import bpy
  47 from bpy.props import BoolProperty, EnumProperty, FloatVectorProperty
  48 from math import fabs
  49 from colorsys import rgb_to_hsv, hsv_to_rgb
  50
  51 class UV_OT_bake_texture_to_vcols(bpy.types.Operator):
  52     bl_idname = "uv.bake_texture_to_vcols"
  53     bl_label = "Bake UV-Texture to Vertex Colors"
  54     bl_description = "Bake active UV-Texture to new Vertex Color layer "\
  55         "(requires image texture)"
  56     bl_options = {'REGISTER', 'UNDO'}
  57
  58     replace_active_layer: BoolProperty(
  59         name="Replace layer",
  60         description="Overwrite active Vertex Color layer",
  61         default=True)
  62
  63     mappingModes = [
  64         ("CLIP", "Clip", "Don't affect vertices who's UV-coordinates are out of bounds."),
  65         ("REPEAT", "Repeat", "Tile the image so that each vertex is accounted for."),
  66         ("EXTEND", "Extend", "Extends the edges of the image to the UV-coordinates.")]
  67
  68     mappingMode: EnumProperty(
  69        items=mappingModes,
  70        default="CLIP",
  71        name="Mapping",
  72        description="The mode to use for baking vertices who's UV-coordinates are out of bounds")
  73
  74     blendingModes = [("MIX", "Mix", ""),
  75                      ("ADD", "Add", ""),
  76                      ("SUBTRACT", "Subtract", ""),
  77                      ("MULTIPLY", "Multiply", ""),
  78                      ("SCREEN", "Screen", ""),
  79                      ("OVERLAY", "Overlay", ""),
  80                      ("DIFFERENCE", "Difference", ""),
  81                      ("DIVIDE", "Divide", ""),
  82                      ("DARKEN", "Darken", ""),
  83                      ("LIGHTEN", "Lighten", ""),
  84                      ("HUE", "Hue", ""),
  85                      ("SATURATION", "Saturation", ""),
  86                      ("VALUE", "Value", ""),
  87                      ("COLOR", "Color", ""),
  88                      ("SOFT_LIGHT", "Soft Light", ""),
  89                      ("LINEAR_LIGHT", "Linear Light", "")
  90                     ]
  91
  92     blendingMode: EnumProperty(
  93         items=blendingModes,
  94         default="MULTIPLY",
  95         name="Blend Type",
  96         description="The blending mode to use when baking")
  97
  98     mirror_x: BoolProperty(name="Mirror X", description="Mirror the image on the X-axis")
  99     mirror_y: BoolProperty(name="Mirror Y", description="Mirror the image on the Y-axis")
 100
 101     @classmethod
 102     def poll(self, context):
 103         return (context.object and
 104                 context.object.type == 'MESH' and
 105                 context.mode != 'EDIT_MESH' and
 106                 context.object.data.uv_layers.active and
 107                 context.object.data.uv_textures.active)
 108
 109     def execute(self, context):
 110         obdata = context.object.data
 111
 112         if self.replace_active_layer and obdata.vertex_colors.active:
 113             vertex_colors = obdata.vertex_colors.active
 114         else:
 115             vertex_colors = obdata.vertex_colors.new(name="Baked UV texture")
 116
 117             if not vertex_colors:
 118
 119                 # Can't add more than 17 VCol layers
 120                 self.report({'ERROR'},
 121                     "Couldn't add another Vertex Color layer,\n"
 122                     "Please remove an existing layer or replace active.")
 123
 124                 return {'CANCELLED'}
 125
 126         obdata.vertex_colors.active = vertex_colors
 127
 128         uv_images = {}
 129         for uv_tex in obdata.uv_textures.active.data:
 130             if (uv_tex.image and
 131                 uv_tex.image.name not in uv_images and
 132                 uv_tex.image.pixels):
 133
 134                 uv_images[uv_tex.image.name] = (
 135                     uv_tex.image.size[0],
 136                     uv_tex.image.size[1],
 137                     uv_tex.image.pixels[:]
 138                     # Accessing pixels directly is far too slow.
 139                     # Copied to new array for massive performance-gain.
 140                 )
 141
 142         for p in obdata.polygons:
 143             img = obdata.uv_textures.active.data[p.index].image
 144             if not img:
 145                 continue
 146
 147             image_size_x, image_size_y, uv_pixels = uv_images[img.name]
 148
 149             for loop in p.loop_indices:
 150
 151                 co = obdata.uv_layers.active.data[loop].uv
 152                 x_co = round(co[0] * (image_size_x - 1))
 153                 y_co = round(co[1] * (image_size_y - 1))
 154
 155                 if x_co < 0 or x_co >= image_size_x or y_co < 0 or y_co >= image_size_y:
 156                     if self.mappingMode == 'CLIP':
 157                         continue
 158
 159                     elif self.mappingMode == 'REPEAT':
 160                         x_co %= image_size_x
 161                         y_co %= image_size_y
 162
 163                     elif self.mappingMode == 'EXTEND':
 164                         if x_co > image_size_x - 1:
 165                             x_co = image_size_x - 1
 166                         if x_co < 0:
 167                             x_co = 0
 168                         if y_co > image_size_y - 1:
 169                             y_co = image_size_y - 1
 170                         if y_co < 0:
 171                             y_co = 0
 172
 173                 if self.mirror_x:
 174                      x_co = image_size_x -1 - x_co
 175
 176                 if self.mirror_y:
 177                      y_co = image_size_y -1 - y_co
 178
 179                 col_out = vertex_colors.data[loop].color
 180
 181                 pixelNumber = (image_size_x * y_co) + x_co
 182                 r = uv_pixels[pixelNumber*4]
 183                 g = uv_pixels[pixelNumber*4 + 1]
 184                 b = uv_pixels[pixelNumber*4 + 2]
 185                 a = uv_pixels[pixelNumber*4 + 3]
 186
 187                 col_in = r, g, b # texture-color
 188                 col_result = [r,g,b] # existing / 'base' color
 189
 190                 if self.blendingMode == 'MIX':
 191                     col_result = col_in
 192
 193                 elif self.blendingMode == 'ADD':
 194                     col_result[0] = col_in[0] + col_out[0]
 195                     col_result[1] = col_in[1] + col_out[1]
 196                     col_result[2] = col_in[2] + col_out[2]
 197
 198                 elif self.blendingMode == 'SUBTRACT':
 199                     col_result[0] = col_in[0] - col_out[0]
 200                     col_result[1] = col_in[1] - col_out[1]
 201                     col_result[2] = col_in[2] - col_out[2]
 202
 203                 elif self.blendingMode == 'MULTIPLY':
 204                     col_result[0] = col_in[0] * col_out[0]
 205                     col_result[1] = col_in[1] * col_out[1]
 206                     col_result[2] = col_in[2] * col_out[2]
 207
 208                 elif self.blendingMode == 'SCREEN':
 209                     col_result[0] = 1 - (1.0 - col_in[0]) * (1.0 - col_out[0])
 210                     col_result[1] = 1 - (1.0 - col_in[1]) * (1.0 - col_out[1])
 211                     col_result[2] = 1 - (1.0 - col_in[2]) * (1.0 - col_out[2])
 212
 213                 elif self.blendingMode == 'OVERLAY':
 214                     if col_out[0] < 0.5:
 215                         col_result[0] = col_out[0] * (2.0 * col_in[0])
 216                     else:
 217                         col_result[0] = 1.0 - (2.0 * (1.0 - col_in[0])) * (1.0 - col_out[0])
 218                     if col_out[1] < 0.5:
 219                         col_result[1] = col_out[1] * (2.0 * col_in[1])
 220                     else:
 221                         col_result[1] = 1.0 - (2.0 * (1.0 - col_in[1])) * (1.0 - col_out[1])
 222                     if col_out[2] < 0.5:
 223                         col_result[2] = col_out[2] * (2.0 * col_in[2])
 224                     else:
 225                         col_result[2] = 1.0 - (2.0 * (1.0 - col_in[2])) * (1.0 - col_out[2])
 226
 227                 elif self.blendingMode == 'DIFFERENCE':
 228                     col_result[0] = fabs(col_in[0] - col_out[0])
 229                     col_result[1] = fabs(col_in[1] - col_out[1])
 230                     col_result[2] = fabs(col_in[2] - col_out[2])
 231
 232                 elif self.blendingMode == 'DIVIDE':
 233                     if(col_in[0] != 0.0):
 234                         col_result[0] = col_out[0] / col_in[0]
 235                     if(col_in[1] != 0.0):
 236                         col_result[0] = col_out[1] / col_in[1]
 237                     if(col_in[2] != 0.0):
 238                         col_result[2] = col_out[2] / col_in[2]
 239
 240                 elif self.blendingMode == 'DARKEN':
 241                     if col_in[0] < col_out[0]:
 242                         col_result[0] = col_in[0]
 243                     else:
 244                         col_result[0] = col_out[0]
 245                     if col_in[1] < col_out[1]:
 246                         col_result[1] = col_in[1]
 247                     else:
 248                         col_result[1] = col_out[1]
 249                     if col_in[2] < col_out[2]:
 250                         col_result[2] = col_in[2]
 251                     else:
 252                         col_result[2] = col_out[2]
 253
 254
 255                 elif self.blendingMode == 'LIGHTEN':
 256                     if col_in[0] > col_out[0]:
 257                         col_result[0] = col_in[0]
 258                     else:
 259                         col_result[0] = col_out[0]
 260                     if col_in[1] > col_out[1]:
 261                         col_result[1] = col_in[1]
 262                     else:
 263                         col_result[1] = col_out[1]
 264                     if col_in[2] > col_out[2]:
 265                         col_result[2] = col_in[2]
 266                     else:
 267                         col_result[2] = col_out[2]
 268
 269                 elif self.blendingMode == 'HUE':
 270                     hsv_in = rgb_to_hsv(col_in[0], col_in[1], col_in[2])
 271                     hsv_out = rgb_to_hsv(col_out[0], col_out[1], col_out[2])
 272                     hue = hsv_in[0]
 273                     col_result = hsv_to_rgb(hue, hsv_out[1], hsv_out[2])
 274
 275                 elif self.blendingMode == 'SATURATION':
 276                     hsv_in = rgb_to_hsv(col_in[0], col_in[1], col_in[2])
 277                     hsv_out = rgb_to_hsv(col_out[0], col_out[1], col_out[2])
 278                     sat = hsv_in[1]
 279                     col_result = hsv_to_rgb(hsv_out[0], sat, hsv_out[2])
 280
 281                 elif self.blendingMode == 'VALUE':
 282                     hsv_in = rgb_to_hsv(col_in[0], col_in[1], col_in[2])
 283                     hsv_out = rgb_to_hsv(col_out[0], col_out[1], col_out[2])
 284                     val = hsv_in[2]
 285                     col_result = hsv_to_rgb(hsv_out[0], hsv_out[1], val)
 286
 287                 elif self.blendingMode == 'COLOR':
 288                     hsv_in = rgb_to_hsv(col_in[0], col_in[1], col_in[2])
 289                     hsv_out = rgb_to_hsv(col_out[0], col_out[1], col_out[2])
 290                     hue = hsv_in[0]
 291                     sat = hsv_in[1]
 292                     col_result = hsv_to_rgb(hue, sat, hsv_out[2])
 293
 294                 elif self.blendingMode == 'SOFT_LIGHT':
 295                     scr = 1 - (1.0 - col_in[0]) * (1.0 - col_out[0])
 296                     scg = 1 - (1.0 - col_in[1]) * (1.0 - col_out[1])
 297                     scb = 1 - (1.0 - col_in[2]) * (1.0 - col_out[2])
 298
 299                     col_result[0] = (1.0 - col_out[0]) * (col_in[0] * col_out[0]) + (col_out[0] * scr)
 300                     col_result[1] = (1.0 - col_out[1]) * (col_in[1] * col_out[1]) + (col_out[1] * scg)
 301                     col_result[2] = (1.0 - col_out[2]) * (col_in[2] * col_out[2]) + (col_out[2] * scb)
 302
 303
 304                 elif self.blendingMode == 'LINEAR_LIGHT':
 305                     if col_in[0] > 0.5:
 306                         col_result[0] = col_out[0] + 2.0 * (col_in[0] - 0.5)
 307                     else:
 308                         col_result[0] = col_out[0] + 2.0 * (col_in[0] - 1.0)
 309                     if col_in[1] > 0.5:
 310                         col_result[1] = col_out[1] + 2.0 * (col_in[1] - 0.5)
 311                     else:
 312                         col_result[1] = col_out[1] + 2.0 * (col_in[1] - 1.0)
 313                     if col_in[2] > 0.5:
 314                         col_result[2] = col_out[2] + 2.0 * (col_in[2] - 0.5)
 315                     else:
 316                         col_result[2] = col_out[2] + 2.0 * (col_in[2] - 1.0)
 317
 318                 # Add alpha color
 319                 a_inverted = 1 - a
 320                 alpha_color = context.scene.uv_bake_alpha_color
 321                 col_result = (col_result[0] * a + alpha_color[0] * a_inverted,
 322                               col_result[1] * a + alpha_color[1] * a_inverted,
 323                               col_result[2] * a + alpha_color[2] * a_inverted)
 324
 325                 vertex_colors.data[loop].color = col_result
 326
 327         return {'FINISHED'}
 328
 329 class VIEW3D_PT_tools_uv_bake_texture_to_vcols(bpy.types.Panel):
 330     bl_label = "Bake"
 331     bl_space_type = "VIEW_3D"
 332     bl_region_type = "TOOLS"
 333     bl_options = {'DEFAULT_CLOSED'}
 334
 335     @classmethod
 336     def poll(self, context):
 337         return(context.mode == 'PAINT_VERTEX')
 338
 339     def draw(self, context):
 340         layout = self.layout
 341         col = layout.column()
 342         col.prop(context.scene, "uv_bake_alpha_color")
 343         col.separator()
 344         col.operator("uv.bake_texture_to_vcols", text="UV Texture to VCols")
 345
 346 def register():
 347     bpy.utils.register_module(__name__)
 348     bpy.types.Scene.uv_bake_alpha_color = FloatVectorProperty(
 349         name="Alpha Color",
 350         description="Color to be used for transparency",
 351         subtype='COLOR',
 352         min=0.0,
 353         max=1.0)
 354
 355 def unregister():
 356     bpy.utils.unregister_module(__name__)
 357     del bpy.types.Scene.uv_bake_alpha_color
 358
 359 if __name__ == "__main__":
 360     register()