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.
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);
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.
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