strands.py 文件源码

def new_strand(hair_system=None):

    if not hair_system:
        selection = cmds.ls(sl=True, dag=True, leaf=True, type='hairSystem')
        if selection:
            hair_system = selection[0]

    start = om.MVector(0, 0, 0)
    end = om.MVector(0, 0, 24)

    start_loc = cmds.spaceLocator(name='strand_start#')[0]
    end_loc = cmds.spaceLocator(name='strand_end#')[0]
    cmds.xform(end_loc, ws=True, translation=end)

    tta = cmds.createNode('transformsToArrays')
    cmds.connectAttr(start_loc + '.worldMatrix', tta + '.inTransforms[0].inMatrix')
    cmds.connectAttr(end_loc + '.worldMatrix', tta + '.inTransforms[1].inMatrix')
    pcc = cmds.createNode('pointCloudToCurve')
    cmds.connectAttr(tta + '.outPositionPP', pcc + '.inArray')
    expand_grp = cmds.group([start_loc, end_loc], name='strand_expand_grp#')

    curve, curve_shape = curve_between(start, end, name='strand_curve#')
    cmds.connectAttr(pcc + '.outCurve', curve_shape + '.create')
    root_grp = cmds.group(empty=True, name='strand_grp#')
    cmds.parent([expand_grp, curve], root_grp)

    follicle_nodes, out_curve_nodes = add_curve_to_system(curve_shape, hair_system)
    follicle_shape = follicle_nodes[1]
    cmds.setAttr(follicle_shape + '.pointLock', 3)
    cmds.setAttr(follicle_shape + '.sampleDensity', 24)