255 lines
8.0 KiB
Python
255 lines
8.0 KiB
Python
#!BPY
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"""
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Name: 'Follow Active (quads)'
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Blender: 242
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Group: 'UVCalculation'
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Tooltip: 'Follow from active quads.'
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"""
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__author__ = "Campbell Barton"
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__url__ = ("blender", "blenderartists.org")
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__version__ = "1.0 2006/02/07"
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__bpydoc__ = """\
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This script sets the UV mapping and image of selected faces from adjacent unselected faces.
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for full docs see...
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http://mediawiki.blender.org/index.php/Scripts/Manual/UV_Calculate/Follow_active_quads
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"""
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# ***** BEGIN GPL LICENSE BLOCK *****
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#
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# Script copyright (C) Campbell J Barton
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# ***** END GPL LICENCE BLOCK *****
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# --------------------------------------------------------------------------
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from Blender import *
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import bpy
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import BPyMesh
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def extend(EXTEND_MODE,ob):
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if EXTEND_MODE == -1:
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return
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me = ob.getData(mesh=1)
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me_verts = me.verts
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# Toggle Edit mode
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is_editmode = Window.EditMode()
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if is_editmode:
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Window.EditMode(0)
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Window.WaitCursor(1)
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t = sys.time()
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edge_average_lengths = {}
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OTHER_INDEX = 2,3,0,1
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FAST_INDICIES = 0,2,1,3 # order is faster
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def extend_uvs(face_source, face_target, edge_key):
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'''
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Takes 2 faces,
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Projects its extends its UV coords onto the face next to it.
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Both faces must share an edge.
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'''
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def face_edge_vs(vi):
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# assunme a quad
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return [(vi[0], vi[1]), (vi[1], vi[2]), (vi[2], vi[3]), (vi[3], vi[0])]
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uvs_source = face_source.uv
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uvs_target = face_target.uv
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vidx_source = [v.index for v in face_source]
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vidx_target = [v.index for v in face_target]
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# vertex index is the key, uv is the value
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uvs_vhash_source = dict( [ (vindex, uvs_source[i]) for i, vindex in enumerate(vidx_source)] )
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uvs_vhash_target = dict( [ (vindex, uvs_target[i]) for i, vindex in enumerate(vidx_target)] )
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edge_idxs_source = face_edge_vs(vidx_source)
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edge_idxs_target = face_edge_vs(vidx_target)
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source_matching_edge = -1
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target_matching_edge = -1
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edge_key_swap = edge_key[1], edge_key[0]
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try: source_matching_edge = edge_idxs_source.index(edge_key)
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except: source_matching_edge = edge_idxs_source.index(edge_key_swap)
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try: target_matching_edge = edge_idxs_target.index(edge_key)
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except: target_matching_edge = edge_idxs_target.index(edge_key_swap)
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edgepair_inner_source = edge_idxs_source[source_matching_edge]
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edgepair_inner_target = edge_idxs_target[target_matching_edge]
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edgepair_outer_source = edge_idxs_source[OTHER_INDEX[source_matching_edge]]
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edgepair_outer_target = edge_idxs_target[OTHER_INDEX[target_matching_edge]]
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if edge_idxs_source[source_matching_edge] == edge_idxs_target[target_matching_edge]:
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iA= 0; iB= 1 # Flipped, most common
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else: # The normals of these faces must be different
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iA= 1; iB= 0
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# Set the target UV's touching source face, no tricky calc needed,
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uvs_vhash_target[edgepair_inner_target[0]][:] = uvs_vhash_source[edgepair_inner_source[iA]]
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uvs_vhash_target[edgepair_inner_target[1]][:] = uvs_vhash_source[edgepair_inner_source[iB]]
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# Set the 2 UV's on the target face that are not touching
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# for this we need to do basic expaning on the source faces UV's
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if EXTEND_MODE == 2:
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try: # divide by zero is possible
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'''
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measure the length of each face from the middle of each edge to the opposite
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allong the axis we are copying, use this
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'''
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i1a= edgepair_outer_target[iB]
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i2a= edgepair_inner_target[iA]
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if i1a>i2a: i1a, i2a = i2a, i1a
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i1b= edgepair_outer_source[iB]
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i2b= edgepair_inner_source[iA]
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if i1b>i2b: i1b, i2b = i2b, i1b
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# print edge_average_lengths
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factor = edge_average_lengths[i1a, i2a][0] / edge_average_lengths[i1b, i2b][0]
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except:
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# Div By Zero?
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factor = 1.0
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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]])
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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]])
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else:
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# same as above but with no factor
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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]])
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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]])
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if not me.faceUV:
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me.faceUV= True
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face_act = me.activeFace
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if face_act == -1:
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Draw.PupMenu('ERROR: No active face')
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return
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face_sel= [f for f in me.faces if len(f) == 4 and f.sel]
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face_act_local_index = -1
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for i, f in enumerate(face_sel):
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if f.index == face_act:
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face_act_local_index = i
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break
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if face_act_local_index == -1:
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Draw.PupMenu('ERROR: Active face not selected')
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return
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# Modes
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# 0 unsearched
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# 1:mapped, use search from this face. - removed!!
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# 2:all siblings have been searched. dont search again.
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face_modes = [0] * len(face_sel)
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face_modes[face_act_local_index] = 1 # extend UV's from this face.
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# Edge connectivty
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edge_faces = {}
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for i, f in enumerate(face_sel):
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for edkey in f.edge_keys:
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try: edge_faces[edkey].append(i)
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except: edge_faces[edkey] = [i]
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SEAM = Mesh.EdgeFlags.SEAM
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if EXTEND_MODE == 2:
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edge_loops = BPyMesh.getFaceLoopEdges(face_sel, [ed.key for ed in me.edges if ed.flag & SEAM] )
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me_verts = me.verts
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for loop in edge_loops:
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looplen = [0.0]
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for ed in loop:
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edge_average_lengths[ed] = looplen
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looplen[0] += (me_verts[ed[0]].co - me_verts[ed[1]].co).length
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looplen[0] = looplen[0] / len(loop)
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# remove seams, so we dont map accross seams.
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for ed in me.edges:
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if ed.flag & SEAM:
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# remove the edge pair if we can
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try: del edge_faces[ed.key]
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except: pass
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# Done finding seams
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# face connectivity - faces around each face
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# only store a list of indicies for each face.
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face_faces = [[] for i in xrange(len(face_sel))]
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for edge_key, faces in edge_faces.iteritems():
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if len(faces) == 2: # Only do edges with 2 face users for now
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face_faces[faces[0]].append((faces[1], edge_key))
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face_faces[faces[1]].append((faces[0], edge_key))
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# Now we know what face is connected to what other face, map them by connectivity
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ok = True
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while ok:
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ok = False
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for i in xrange(len(face_sel)):
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if face_modes[i] == 1: # searchable
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for f_sibling, edge_key in face_faces[i]:
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if face_modes[f_sibling] == 0:
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face_modes[f_sibling] = 1 # mapped and search from.
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extend_uvs(face_sel[i], face_sel[f_sibling], edge_key)
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face_modes[i] = 1 # we can map from this one now.
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ok= True # keep searching
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face_modes[i] = 2 # dont search again
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print sys.time() - t
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if is_editmode:
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Window.EditMode(1)
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else:
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me.update()
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Window.RedrawAll()
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Window.WaitCursor(0)
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def main():
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sce = bpy.data.scenes.active
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ob = sce.objects.active
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# print ob, ob.type
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if ob == None or ob.type != 'Mesh':
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Draw.PupMenu('ERROR: No mesh object.')
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return
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# 0:normal extend, 1:edge length
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EXTEND_MODE = Draw.PupMenu("Use Face Area%t|Loop Average%x2|None%x0")
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extend(EXTEND_MODE,ob)
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if __name__ == '__main__':
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main()
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