How to realign PATCH object along with plotted 3D GRAPH network?

I try to plot a 3d graph network over a loaded STL object to enhanced visualization. I would like to know if I can move and rotate the plotted PATCH object to align perfectly under plotted scalph graph network?

Here is a list of function I used in the script:

• EEGLAB for getting EEG.chanlocs (electrode position) for plotting graph network, this value is constant for all plot.
• STL File Reader by Eric Johnson for import 3d brain file

Here is my code so far:

W1 = threshold_proportional(plv, 0.2); % thresholding for PLV
W2 = threshold_proportional(pliComputed, 0.2); % thresholding for PLI
W3 = threshold_proportional(PTE,0.2); % thresholding for PTE
W4 = threshold_proportional(dPTE,0.2); % thresholding for dPTE

w = W1; % change data here

st = sum(w,2); % compute network strength
[links,wij,rgb] = convMatrixGraph(w); % compute plotting parameters

figure
hold on;
for ll = 1 : length(links)  %% plotting links
    line([EEG.chanlocs(links(ll,1)).X, EEG.chanlocs(links(ll,2)).X], [EEG.chanlocs(links(ll,1)).Y, EEG.chanlocs(links(ll,2)).Y], [EEG.chanlocs(links(ll,1)).Z, EEG.chanlocs(links(ll,2)).Z], 'LineWidth', wij(ll), 'Color', rgb(ll,:) );
end
colormap(jet);
% colorbar
for nn = 1 : 32            %% plotting nodes
    plot3(EEG.chanlocs(nn).X, EEG.chanlocs(nn).Y, EEG.chanlocs(nn).Z, 'ro', 'MarkerSize', st(nn), 'MarkerFaceColor', 'y')
    text(EEG.chanlocs(nn).X+0.5, EEG.chanlocs(nn).Y, EEG.chanlocs(nn).Z, EEG.chanlocs(nn).labels, 'FontSize', 11);
end

% read brain model file
fv = stlread('brain.stl');

%% Render
% The model is rendered with a PATCH graphics object. We also add some dynamic
% lighting, and adjust the material properties to change the specular
% highlighting.

patch(fv,'FaceColor',       [0.8 0.8 1.0], ...
         'EdgeColor',       'none',        ...
         'FaceLighting',    'gouraud',     ...
         'AmbientStrength', 0.15,          ...
         'FaceAlpha',       0.07);

% Add a camera light, and tone down the specular highlighting
camlight('headlight');
material('dull');

% Fix the axes scaling, and set a nice view angle
axis('image');
view([-135 35]);
% view([270 90]);             %% rotating to vertical view

axis equal; axis off;
title('test mapping 3D')
set(gcf, 'units','normalized','outerposition',[0 0 1 1]) %EXPANDING FIGURE ON SCREEN   

Here is the current result and how I would like to move it:

Top view & side & front view

My expected result:

to rotate, move under the plotted graph and enlarge to fit the scale. The brain model is set to semi-transparent also to see the line connection.

Any help would be greatly appreciate, thank you.

Answer 1

[Walter Roberson]

See hgtransform and makehgtform

You would create a hgtransform() whose parent is the axes, and when you patch() you would tell patch() that the 'Parent' object is the hgtransform you created. Then you would set the Matrix property of the hgtransform to be a Transformation Matrix -- a 4 x 4 rotation / scaling / translation matrix. Using makehgtform() makes it a lot easier to create such matrix -- just remember that the last operation you list in creating the transform is the one that is applied first.

You might, for example, subtract off the coordinates of a point you want to rotate around, then rotate, then add back on the points you are rotating around, to get the overall effect of rotation around that point.