curves.py 文件源码

def align_to_curve(xforms, curve):

    curve_fn = to_curve_fn(curve)
    num_xforms = len(xforms)
    param_step = curve_fn.numSpans / float(num_xforms - 1)
    for i, xform in enumerate(xforms):
        param = i * param_step
        normal = curve_fn.normal(param, om.MSpace.kWorld)
        tangent = -curve_fn.tangent(param, om.MSpace.kWorld)
        position = curve_fn.getPointAtParam(param, om.MSpace.kWorld)
        matrix = build_matrix(normal, tangent, position)
        cmds.xform(xform, ws=True, matrix=matrix)