OBJ import support for nurbs curves
Imports nurbs with orderU and endpointU (inferred from weights). No support for vert-weights, surfaces, 2D curves or non-bspline's yet. fix for exporting closed nurbs, was overlapping too much of the curve.
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Campbell Barton
parent
642fea299b
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96c5f36eff
@ -236,9 +236,8 @@ def write_nurb(file, ob, ob_mat):
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pt_num += 1
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curve_ls.append(-1)
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else:
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val = DEG_ORDER_U - 1
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pt_num += val*2
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curve_ls = curve_ls[-val:] + curve_ls + curve_ls[0:val] # Blenders OrderU of 3 -> val==1, 4 -> 2 etc
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pt_num += DEG_ORDER_U-1
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curve_ls = curve_ls + curve_ls[0:DEG_ORDER_U]
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file.write('curv 0.0 1.0 %s\n' % (' '.join( [str(i) for i in curve_ls] ))) # Blender has no U and V values for the curve
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@ -536,6 +536,96 @@ def create_mesh(scn, new_objects, has_ngons, CREATE_FGONS, CREATE_EDGES, verts_l
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me.addVertGroup(group_name)
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me.assignVertsToGroup(group_name, group_indicies,1.00, Mesh.AssignModes.REPLACE)
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def create_nurbs(scn, context_nurbs, vert_loc, new_objects):
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'''
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Add nurbs object to blender, only support one type at the moment
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'''
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deg = context_nurbs.get('deg', (3,))
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curv_range = context_nurbs.get('curv_range', None)
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curv_idx = context_nurbs.get('curv_idx', [])
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parm_u = context_nurbs.get('parm_u', [])
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parm_v = context_nurbs.get('parm_v', [])
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name = context_nurbs.get('name', 'ObjNurb')
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cstype = context_nurbs.get('cstype', None)
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if cstype == None:
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print '\tWarning, cstype not found'
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return
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if cstype != 'bspline':
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print '\tWarning, cstype is not supported (only bspline)'
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return
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if not curv_idx:
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print '\tWarning, curv argument empty or not set'
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return
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if len(deg) > 1 or parm_v:
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print '\tWarning, surfaces not supported'
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return
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cu = bpy.data.curves.new(name, 'Curve')
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nu = None
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for pt in curv_idx:
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pt = vert_loc[pt]
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pt = (pt[0], pt[1], pt[2], 1.0)
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if nu == None:
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nu = cu.appendNurb(pt)
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else:
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nu.append(pt)
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nu.orderU = deg[0]+1
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# get for endpoint flag from the weighting
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if curv_range and len(parm_u) > deg[0]+1:
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do_endpoints = True
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for i in xrange(deg[0]+1):
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if abs(parm_u[i]-curv_range[0]) > 0.0001:
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do_endpoints = False
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break
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if abs(parm_u[-(i+1)]-curv_range[1]) > 0.0001:
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do_endpoints = False
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break
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else:
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do_endpoints = False
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if do_endpoints:
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nu.flagU |= 2
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# close
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'''
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do_closed = False
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if len(parm_u) > deg[0]+1:
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for i in xrange(deg[0]+1):
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#print curv_idx[i], curv_idx[-(i+1)]
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if curv_idx[i]==curv_idx[-(i+1)]:
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do_closed = True
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break
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if do_closed:
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nu.flagU |= 1
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'''
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ob = scn.objects.new(cu)
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new_objects.append(ob)
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def strip_slash(line_split):
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if line_split[-1][-1]== '\\':
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if len(line_split[-1])==1:
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line_split.pop() # remove the \ item
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else:
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line_split[-1]= line_split[-1][:-1] # remove the \ from the end last number
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return True
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return False
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def get_float_func(filepath):
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'''
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find the float function for this obj file
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@ -590,6 +680,11 @@ def load_obj(filepath,
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context_smooth_group= None
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context_object= None
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context_vgroup = None
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# Nurbs
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context_nurbs = {}
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nurbs = []
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context_parm = '' # used by nurbs too but could be used elsewhere
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has_ngons= False
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# has_smoothgroups= False - is explicit with len(unique_smooth_groups) being > 0
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@ -604,7 +699,7 @@ def load_obj(filepath,
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# it means they are multiline-
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# since we use xreadline we cant skip to the next line
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# so we need to know weather
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multi_line_face= False
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context_multi_line= ''
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print '\tparsing obj file "%s"...' % filepath,
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time_sub= sys.time()
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@ -627,12 +722,11 @@ def load_obj(filepath,
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# Handel faces lines (as faces) and the second+ lines of fa multiline face here
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# use 'f' not 'f ' because some objs (very rare have 'fo ' for faces)
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elif line.startswith('f') or (line.startswith('l ') and CREATE_EDGES) or multi_line_face:
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elif line.startswith('f') or context_multi_line == 'f':
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if multi_line_face:
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if context_multi_line:
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# use face_vert_loc_indicies and face_vert_tex_indicies previously defined and used the obj_face
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line_split= line.split()
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multi_line_face= False
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else:
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line_split= line[2:].split()
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@ -648,14 +742,10 @@ def load_obj(filepath,
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context_object\
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))
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if line_split[-1][-1]== '\\':
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multi_line_face= True
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if len(line_split[-1])==1:
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line_split.pop() # remove the \ item
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else:
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line_split[-1]= line_split[-1][:-1] # remove the \ from the end last number
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isline= line.startswith('l')
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if strip_slash(line_split):
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context_multi_line = 'f'
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else:
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context_multi_line = ''
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for v in line_split:
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obj_vert= v.split('/')
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@ -672,24 +762,60 @@ def load_obj(filepath,
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face_vert_loc_indicies.append(vert_loc_index)
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if not isline:
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if len(obj_vert)>1 and obj_vert[1]:
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# formatting for faces with normals and textures us
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# loc_index/tex_index/nor_index
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vert_tex_index= int(obj_vert[1])-1
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# Make relative negative vert indicies absolute
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if vert_tex_index < 0:
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vert_tex_index= len(verts_tex) + vert_tex_index + 1
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face_vert_tex_indicies.append(vert_tex_index)
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else:
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# dummy
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face_vert_tex_indicies.append(0)
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if len(obj_vert)>1 and obj_vert[1]:
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# formatting for faces with normals and textures us
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# loc_index/tex_index/nor_index
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vert_tex_index= int(obj_vert[1])-1
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# Make relative negative vert indicies absolute
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if vert_tex_index < 0:
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vert_tex_index= len(verts_tex) + vert_tex_index + 1
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face_vert_tex_indicies.append(vert_tex_index)
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else:
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# dummy
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face_vert_tex_indicies.append(0)
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if len(face_vert_loc_indicies) > 4:
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has_ngons= True
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elif CREATE_EDGES and (line.startswith('l ') or context_multi_line == 'l'):
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# very similar to the face load function above with some parts removed
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if context_multi_line:
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# use face_vert_loc_indicies and face_vert_tex_indicies previously defined and used the obj_face
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line_split= line.split()
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else:
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line_split= line[2:].split()
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face_vert_loc_indicies= []
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face_vert_tex_indicies= []
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# Instance a face
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faces.append((\
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face_vert_loc_indicies,\
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face_vert_tex_indicies,\
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context_material,\
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context_smooth_group,\
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context_object\
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))
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if strip_slash(line_split):
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context_multi_line = 'l'
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else:
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context_multi_line = ''
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isline= line.startswith('l')
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for v in line_split:
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vert_loc_index= int(v)-1
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# Make relative negative vert indicies absolute
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if vert_loc_index < 0:
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vert_loc_index= len(verts_loc) + vert_loc_index + 1
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face_vert_loc_indicies.append(vert_loc_index)
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elif line.startswith('s'):
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if CREATE_SMOOTH_GROUPS:
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context_smooth_group= line_value(line.split())
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@ -720,6 +846,62 @@ def load_obj(filepath,
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unique_materials[context_material]= None
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elif line.startswith('mtllib'): # usemap or usemat
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material_libs.extend( line.split()[1:] ) # can have multiple mtllib filenames per line
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# Nurbs support
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elif line.startswith('cstype '):
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context_nurbs['cstype']= line_value(line.split()) # 'rat bspline' / 'bspline'
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elif line.startswith('curv ') or context_multi_line == 'curv':
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line_split= line.split()
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curv_idx = context_nurbs['curv_idx'] = context_nurbs.get('curv_idx', []) # incase were multiline
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if not context_multi_line:
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context_nurbs['curv_range'] = float_func(line_split[1]), float_func(line_split[2])
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line_split[0:3] = [] # remove first 3 items
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if strip_slash(line_split):
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context_multi_line = 'curv'
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else:
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context_multi_line = ''
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for i in line_split:
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vert_loc_index = int(i)-1
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if vert_loc_index < 0:
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vert_loc_index= len(verts_loc) + vert_loc_index + 1
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curv_idx.append(vert_loc_index)
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elif line.startswith('parm') or context_multi_line == 'parm':
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line_split= line.split()
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if context_multi_line:
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context_multi_line = ''
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else:
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context_parm = line_split[1]
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line_split[0:2] = [] # remove first 2
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if strip_slash(line_split):
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context_multi_line = 'parm'
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else:
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context_multi_line = ''
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if context_parm.lower() == 'u':
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context_nurbs.setdefault('parm_u', []).extend( [float_func(f) for f in line_split] )
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elif context_parm.lower() == 'v': # surfaces not suported yet
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context_nurbs.setdefault('parm_v', []).extend( [float_func(f) for f in line_split] )
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# else: # may want to support other parm's ?
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elif line.startswith('deg '):
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context_nurbs['deg']= [int(i) for i in line.split()[1:]]
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elif line.startswith('end'):
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# Add the nurbs curve
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context_nurbs['name'] = context_object
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nurbs.append(context_nurbs)
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context_nurbs = {}
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context_parm = ''
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''' # How to use usemap? depricated?
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elif line.startswith('usema'): # usemap or usemat
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@ -754,6 +936,11 @@ def load_obj(filepath,
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# Create meshes from the data, warning 'vertex_groups' wont support splitting
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create_mesh(scn, new_objects, has_ngons, CREATE_FGONS, CREATE_EDGES, verts_loc_split, verts_tex, faces_split, unique_materials_split, unique_material_images, unique_smooth_groups, vertex_groups, dataname)
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# nurbs support
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for context_nurbs in nurbs:
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create_nurbs(scn, context_nurbs, verts_loc, new_objects)
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axis_min= [ 1000000000]*3
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axis_max= [-1000000000]*3
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@ -989,34 +1176,28 @@ if __name__=='__main__' and not DEBUG:
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else:
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Window.FileSelector(load_obj_ui, 'Import a Wavefront OBJ', '*.obj')
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'''
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# For testing compatibility
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'''
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else:
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# DEBUG ONLY
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TIME= sys.time()
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DIR = '/fe/obj'
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import os
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print 'Searching for files'
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os.system('find /fe/obj -iname "*.obj" > /tmp/temp3ds_list')
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def fileList(path):
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for dirpath, dirnames, filenames in os.walk(path):
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for filename in filenames:
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yield os.path.join(dirpath, filename)
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print '...Done'
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file= open('/tmp/temp3ds_list', 'rU')
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lines= file.readlines()
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file.close()
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def between(v,a,b):
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if v <= max(a,b) and v >= min(a,b):
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return True
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return False
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for i, _obj in enumerate(lines):
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if between(i, 0,20):
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_obj= _obj[:-1]
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print 'Importing', _obj, '\nNUMBER', i, 'of', len(lines)
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_obj_file= _obj.split('/')[-1].split('\\')[-1]
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newScn= bpy.data.scenes.new(_obj_file)
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files = [f for f in fileList(DIR) if f.lower().endswith('.obj')]
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files.sort()
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for i, obj_file in enumerate(files):
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if 0 < i < 20:
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print 'Importing', obj_file, '\nNUMBER', i, 'of', len(files)
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newScn= bpy.data.scenes.new(os.path.basename(obj_file))
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newScn.makeCurrent()
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load_obj(_obj, False)
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load_obj(obj_file, False)
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print 'TOTAL TIME: %.6f' % (sys.time() - TIME)
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'''
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