Fix for [#8382] UV unwrap & export puts seams on all edges.
Maya uses OBJ's UV's to generate seams, some people complained that models imported from blender didnt work well in maya. It was faster to write every faces UV (without doing a remove doubles), but sharing UV coords makes smaller files and might also be more efficient in other applications.
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Campbell Barton
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@ -195,9 +195,9 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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def veckey3d(v):
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return round(v.x, 6), round(v.y, 6), round(v.z, 6)
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#def veckey2d(v):
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# return round(v.x, 6), round(v.y, 6)
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def veckey2d(v):
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return round(v.x, 6), round(v.y, 6)
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print 'OBJ Export path: "%s"' % filename
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temp_mesh_name = '~tmp-mesh'
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@ -235,7 +235,7 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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# Initialize totals, these are updated each object
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totverts = totuvco = totno = 1
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face_vert_index = 1 # used for uvs now
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face_vert_index = 1
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globalNormals = {}
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@ -247,7 +247,11 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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me= BPyMesh.getMeshFromObject(ob, containerMesh, EXPORT_APPLY_MODIFIERS, False, scn)
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if not me:
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continue
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faceuv= me.faceUV
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if EXPORT_UV:
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faceuv= me.faceUV
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else:
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faceuv = False
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# We have a valid mesh
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if EXPORT_TRI and me.faces:
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@ -320,7 +324,7 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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# so we dont over context switch in the obj file.
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if EXPORT_MORPH_TARGET:
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pass
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elif faceuv and EXPORT_UV:
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elif faceuv:
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try: faces.sort(key = lambda a: (a.mat, a.image, a.smooth))
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except: faces.sort(lambda a,b: cmp((a.mat, a.image, a.smooth), (b.mat, b.image, b.smooth)))
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elif len(materials) > 1:
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@ -354,10 +358,23 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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file.write('v %.6f %.6f %.6f\n' % tuple(v.co))
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# UV
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if faceuv and EXPORT_UV:
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for f in faces:
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for uv in f.uv:
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file.write('vt %.6f %.6f 0.0\n' % tuple(uv))
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if faceuv:
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uv_face_mapping = [[0,0,0,0] for f in faces] # a bit of a waste for tri's :/
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uv_dict = {} # could use a set() here
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for f_index, f in enumerate(faces):
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for uv_index, uv in enumerate(f.uv):
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uvkey = veckey2d(uv)
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try:
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uv_face_mapping[f_index][uv_index] = uv_dict[uvkey]
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except:
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uv_face_mapping[f_index][uv_index] = uv_dict[uvkey] = len(uv_dict)
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file.write('vt %.6f %.6f\n' % tuple(uv))
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uv_unique_count = len(uv_dict)
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del uv, uvkey, uv_dict, f_index, uv_index
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# Only need uv_unique_count and uv_face_mapping
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# NORMAL, Smooth/Non smoothed.
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if EXPORT_NORMALS:
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@ -376,10 +393,11 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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globalNormals[noKey] = totno
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totno +=1
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file.write('vn %.6f %.6f %.6f\n' % noKey)
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if not faceuv:
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f_image = None
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for f in faces:
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for f_index, f in enumerate(faces):
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f_v= f.v
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f_smooth= f.smooth
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f_mat = min(f.mat, len(materialNames)-1)
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@ -388,7 +406,7 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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f_uv= f.uv
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# MAKE KEY
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if EXPORT_UV and faceuv and f_image: # Object is always true.
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if faceuv and f_image: # Object is always true.
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key = materialNames[f_mat], f_image.name
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else:
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key = materialNames[f_mat], None # No image, use None instead.
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@ -432,13 +450,13 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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contextSmooth = f_smooth
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file.write('f')
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if faceuv and EXPORT_UV:
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if faceuv:
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if EXPORT_NORMALS:
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if f_smooth: # Smoothed, use vertex normals
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for vi, v in enumerate(f_v):
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file.write( ' %d/%d/%d' % (\
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v.index+totverts,\
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face_vert_index + vi,\
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totuvco + uv_face_mapping[f_index][vi],\
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globalNormals[ veckey3d(v.no) ])) # vert, uv, normal
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else: # No smoothing, face normals
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@ -446,14 +464,22 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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for vi, v in enumerate(f_v):
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file.write( ' %d/%d/%d' % (\
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v.index+totverts,\
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face_vert_index + vi,\
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totuvco + uv_face_mapping[f_index][vi],\
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no)) # vert, uv, normal
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else: # No Normals
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for vi, v in enumerate(f_v):
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#print _uv_face_mapping == tuple([tuple([0] * len(f)) for f in faces])
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if len(uv_face_mapping) != len(faces):
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raise "ass"
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print f_index
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print uv_face_mapping[f_index]
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print vi
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print uv_face_mapping[f_index][vi]
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file.write( ' %d/%d' % (\
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v.index+totverts,\
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face_vert_index + vi)) # vert, uv
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totuvco + uv_face_mapping[f_index][vi])) # vert, uv
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face_vert_index += len(f_v)
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@ -486,6 +512,8 @@ EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False, EXPORT_MORPH_TARGET=False)
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# Make the indicies global rather then per mesh
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totverts += len(me.verts)
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if faceuv:
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totuvco += uv_unique_count
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me.verts= None
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file.close()
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