Shape map : create grid from surface points

i’m experimenting with the shape map plugin.
i can create a custom set of points on a curved (trimmed) surface. i would like to make a grid out of this set of points. so i can morph 3d objects on the surface according to the surface dividing points of shape map.
i tried many things but cannot really find out how to do it. does anybody have an example or tutorial of this?