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#### 7.2.87 ND-xform

`(ND-xform OBJID [ntransform { idim odim ... }])`
  Concatenate the given ND-transform with the current ND-transform of the object (apply the ND-transform to object ID, as opposed to simply setting its ND-transform). Note that ND-transforms have their homogeneous coordinate at index 0, while 3D transform have it at index 3.