Chris, thanks.
I looked at the twysted.net and found something that worked.

#macro v_lookat(P1,P2)
	#local Norm=(vnormalize(P2-P1));
	<0,-degrees(asin(Norm.z)),degrees(asin(Norm.y))>
#end

used like this
object	{
	Eye
	rotate v_lookat(point_to_look_at ,location_of_eye)
	translate location_of_eye
	}

Chris Huff wrote:
> 
> From the macro collection at http://twysted.net/
>

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