#!BPY """ Name: 'Follow Active (quads)' Blender: 242 Group: 'UVCalculation' Tooltip: 'Follow from active quads.' """ __author__ = "Campbell Barton" __url__ = ("blender", "elysiun") __version__ = "1.0 2006/02/07" __bpydoc__ = """\ This script sets the UV mapping and image of selected faces from adjacent unselected faces. for full docs see... http://mediawiki.blender.org/index.php/Scripts/Manual/UV_Calculate/Follow_active_quads """ # ***** 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 * import bpy import BPyMesh def extend(): scn = bpy.scenes.active ob = scn.objects.active # print ob, ob.type if ob == None or ob.type != 'Mesh': Draw.PupMenu('ERROR: No mesh object.') return me = ob.getData(mesh=1) me_verts = me.verts # 0:normal extend, 1:edge length EXTEND_MODE = Draw.PupMenu("Use Face Area%t|Loop Average%x2|None%x0") if EXTEND_MODE == -1: return Window.WaitCursor(1) 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): # assunme a quad return [(vi[0], vi[1]), (vi[1], vi[2]), (vi[2], vi[3]), (vi[3], vi[0])] uvs_source = face_source.uv uvs_target = face_target.uv vidx_source = [v.index for v in face_source] vidx_target = [v.index for v in face_target] # 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; iB= 1 # Flipped, most common 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 == 2: 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 factor 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 not me.faceUV: Draw.PupMenu('ERROR: Mesh has no face UV coords.') return face_act = me.activeFace if face_act == -1: Draw.PupMenu('ERROR: No active face') return SELECT_FLAG = Mesh.FaceFlags.SELECT HIDE_FLAG = Mesh.FaceFlags.HIDE def use_face(f_flag): if f_flag & HIDE_FLAG: return False elif f_flag & SELECT_FLAG: return True else: return False face_sel= [f for f in me.faces if len(f) == 4 and use_face(f.flag)] 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: Draw.PupMenu('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 = Mesh.EdgeFlags.SEAM if EXTEND_MODE == 2: edge_loops = BPyMesh.getFaceLoopEdges(face_sel, [ed.key for ed in me.edges if ed.flag & 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.flag & 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 xrange(len(face_sel))] for edge_key, faces in edge_faces.iteritems(): 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 xrange(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 print sys.time() - t me.update() Window.RedrawAll() Window.WaitCursor(0) if __name__ == '__main__': extend()