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find the in-between target values on a given base shape
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| from maya import cmds | |
| import maya.OpenMayaAnim as oa | |
| import maya.OpenMaya as om | |
| def get_inbetween_values(blendshape_node, target_name): | |
| # get the bs api mobject | |
| bs_sel = om.MSelectionList() | |
| bs_sel.add(blendshape_node) | |
| bs_mobj = om.MObject() | |
| bs_sel.getDependNode(0, bs_mobj) | |
| # get affected shapes api MObject | |
| transform_name = cmds.listConnections("{0}.outputGeometry".format(blendshape_node))[0] | |
| mesh_name = cmds.listRelatives(transform_name, children=True)[0] | |
| mesh_sel = om.MSelectionList() | |
| mesh_sel.add(mesh_name) | |
| mesh_dag = om.MDagPath() | |
| mesh_mobj = om.MObject() | |
| mesh_sel.getDagPath(0, mesh_dag) | |
| mesh_sel.getDependNode(0, mesh_mobj) | |
| mesh_mfnmesh = om.MFnMesh(mesh_dag) | |
| # function set for Blendshape | |
| m_bs_func = oa.MFnBlendShapeDeformer(bs_mobj) | |
| # find the target index from name | |
| attr = blendshape_node + '.w[{}]' | |
| weightCount = cmds.blendShape(blendshape_node, q=True, wc=True) | |
| for index in range(weightCount): | |
| if cmds.aliasAttr(attr.format(index), q=True) == target_name: | |
| target_index = index | |
| break | |
| if target_index == None: | |
| raise Exception("Target name cannot be found in the blendshape node") | |
| target_index = deformers.get_bs_index_by_name(blendshape_node, target_name) | |
| # get the target item index list | |
| m_target_arr = om.MIntArray() | |
| m_bs_func.targetItemIndexList(target_index, mesh_mobj, m_target_arr) | |
| if m_target_arr.length() == 1: | |
| return None | |
| # drop the last element of array | |
| m_target_arr.remove(m_target_arr.length()-1) | |
| # return the value in range 0.0 - 0.99 | |
| return [(x - 5000) / 1000.0 for x in m_target_arr] | |
| test=get_inbetween_values("blendShape1", "target_sphere") |
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