# How to create an Object insertable in a 3D plot?

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Marco Froelich on 15 Aug 2017
Commented: José-Luis on 18 Aug 2017
I would like to create three or four objects, made up of a number of individual points, that at my command can be inserted into a 3D plot, at the position and orientation I want to. How can this be done?
Essentially, I have a 3D Plot. I made other 3D plots, and would like to input some of those plots as objects into the new 3D plot. Its like grouping objects in Word i suppose. Through commands, is it possible to dictate orientation and position of that group.

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Marco Froelich on 15 Aug 2017
It would be easier if you had that object, and could input in where ever I want. Its a pretty complex object. And can you explain that?
José-Luis on 15 Aug 2017
What I mean there is no (easy, or sane) way you can have multiple 3D objects in one plot and manipulate them individually.
Also, I don't think the functionality is there to apply the transforms you seem want to an existing object: you will need to transform the underlying data.
Marco Froelich on 16 Aug 2017
Yes thats what I mean tho. As in control the position and orientation of the objects from code.

Sky Sartorius on 17 Aug 2017
One approach could be to leverage the plotted object's XData, YData, and ZData, homogeneous coordinates, and the makehgtform function:
h = surf(peaks);
[X,Y] = meshgrid(h.XData,h.YData);
Z = h.ZData;
sz = size(Z);
M = [X(:) Y(:) Z(:) ones(numel(Z),1)]';
t = makehgtform('axisrotate',[1,2,3],pi/4,'translate',[2,10,-50]);
% Orient and position your object where you want it.
Mt = t*M;
h.XData = reshape(Mt(1,:),sz);
h.YData = reshape(Mt(2,:),sz);
h.ZData = reshape(Mt(3,:),sz);

Marco Froelich on 18 Aug 2017
Could you elaborate on this? I dont fully understand what this helps you acheive :) is it taking the x,y,z data from a table of results?
José-Luis on 18 Aug 2017
The x, y, z data are stored in the figure. Sky is accessing them and changing them, which is what I had suggested in my original comment. You'd need to do that for each individual object.
I did not know makehgtform() existed.