code: def _proj_transform_vec(vec, M):
      vecw = np.dot(M, vec)
      w = vecw[3]
      # clip here..
      txs, tys, tzs = vecw[0] / w, vecw[1] / w, vecw[2] / w
      return txs, tys, tzs
  
imports: import numpy
  from matplotlib import _api
label_desc: Use image node_id 11 for calling a global function with example usage: _proj_transform_vec(vec, M) and returns: txs,  tys,  tzs