Hi,
MATLAB's data cursor mode primarily focuses on points (nodes) rather than entire surfaces. However, you can leverage "ButtonDownFcn"of the plotting function to extract and display information related to the surface (patch) under the clicked point, rather than just the nodal information.
Below code demonstrates how to identify when a patch object is selected when you left click anywhere on the surface and toggles the marker (of vertices) and linewidth property of patch to distinguish it visually.
You can extend the functionality within the "myCustomUpdateFcn" function to include more specific information about the patch.
x1 = [0 0 1 1];
y1 = [3 3 2 2];
z1 = [0 3 2 1];
c1 = [0 0.447 0.741];
x2 = [2 2 3 3];
y2 = [1 1 0 0];
z2 = [1 2 3 0];
c2 = [0.850 0.325 0.098];
fill3(x1,y1,z1,c1,x2,y2,z2,c2, "ButtonDownFcn",@myCustomFcn);
% Define the custom update function
function myCustomFcn(~,event_obj)
target = event_obj.Source;
% Check if the target is a patch
if isa(target, 'matlab.graphics.primitive.Patch')
if target.Marker == "none"
target.Marker = 'o';
target.LineWidth = 3;
else
target.Marker = "none";
target.LineWidth = 0.5
end
% Now target is your selected patch
% Add your own code to modify patch
end
end
If you are trying to modify patch properties, refer the below documentaton for changing patch appearance and behavior.
