a little update of this script
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# Import modules
import operator
# Math utils
def dotProduct(v1, v2):
return sum(map(operator.mul, v1, v2))
# Maya variable
object_space = OpenMaya.MSpace.kObject
world_space = OpenMaya.MSpace.kWorld
# Maya node
obj_1 = pmc.selected()[0]
obj_2 = pmc.selected()[1]
obj_3 = pmc.selected()[2]
# Maya MFn
mfn_obj_1 = obj_1.getShape().__apimfn__()
mfn_obj_2 = obj_2.getShape().__apimfn__()
mfn_obj_3 = obj_3.getShape().__apimfn__()
# Points
points_1 = OpenMaya.MPointArray()
mfn_obj_1.getPoints(points_1, object_space)
points_2 = OpenMaya.MPointArray()
mfn_obj_2.getPoints(points_2, object_space)
points_3 = OpenMaya.MPointArray()
mfn_obj_3.getPoints(points_3, object_space)
# Normals
normals_1 = OpenMaya.MFloatVectorArray()
mfn_obj_1.getVertexNormals(False, normals_1, world_space)
normals_2 = OpenMaya.MFloatVectorArray()
mfn_obj_2.getVertexNormals(False, normals_2, world_space)
normals_3 = OpenMaya.MFloatVectorArray()
mfn_obj_3.getVertexNormals(False, normals_3, world_space)
# Tangents
Tangents_1 = OpenMaya.MFloatVectorArray()
mfn_obj_1.getVertexNormals(False, Tangents_1, world_space)
Tangents_2 = OpenMaya.MFloatVectorArray()
mfn_obj_2.getVertexNormals(False, Tangents_2, world_space)
Tangents_3 = OpenMaya.MFloatVectorArray()
mfn_obj_3.getVertexNormals(False, Tangents_3, world_space)
# Binormals
Binormals_1 = OpenMaya.MFloatVectorArray()
mfn_obj_1.getVertexNormals(False, Binormals_1, world_space)
Binormals_2 = OpenMaya.MFloatVectorArray()
mfn_obj_2.getVertexNormals(False, Binormals_2, world_space)
Binormals_3 = OpenMaya.MFloatVectorArray()
mfn_obj_3.getVertexNormals(False, Binormals_3, world_space)
# Offset
for idx, (f_idx, t_idx) in enumerate(vertex_matched.items()):
f_idx = int(f_idx)
if len(t_idx) > 1:
pmc.warning("Multi Index -- %s --" % t_idx)
continue
t_idx = int(t_idx[0])
offset_point = points_2[f_idx] - points_1[f_idx]
op_x = dotProduct(offset_point, Tangents_1[f_idx])
op_y = dotProduct(offset_point, normals_1[f_idx])
op_z = dotProduct(offset_point, Binormals_1[f_idx])
offset_point_normal = OpenMaya.MVector(Tangents_3[t_idx]) * op_x
offset_point_normal += OpenMaya.MVector(normals_3[t_idx]) * op_y
offset_point_normal += OpenMaya.MVector(Binormals_3[t_idx]) * op_z
final_point = points_3[t_idx] + offset_point
mfn_obj_3.setPoint(t_idx, OpenMaya.MPoint(final_point), object_space)
# Restore point
# mfn_obj_3.setPoints(points_3, object_space)
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This is very powerful with a comparison between two mesh points.
I used to pass on blendshape a mesh to another. It is possible to combine
it with blendshapes etc etc.
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