Homec4science
Diffusion MSM (boubat) Browse

msm/ShoulderModel_rTSA/TOOLBOX_Ribcage_Ellipsoid/ELLIPSOID_TOOL_run_optimisation.m
07fe7aaf51b9boubat

Last Change
Raw File

ELLIPSOID_TOOL_run_optimisation.m
View Options

function REDATA = ELLIPSOID_TOOL_run_optimisation(EOPTDATA, BLDATA)
% Ribcage Ellipsoid Optimisation Overhead function.
%--------------------------------------------------------------------------
% Syntax :
% REDATA = ELLIPSOID_TOOL_run_optimisation(EOPTDATA, BLDATA)
%--------------------------------------------------------------------------
%
% EPFL - LA - LBO SHOULDER MODEL
% Created by : David Ingram (LA - EPFL)
%
% File Description :
% This function runs the optimisation procedure for the ribcage ellipsoid.
% Once a solution is found, the ellipsoid is adapted to the points TS and
% AI.
%
%--------------------------------------------------------------------------
% Create a wait bar to help the user be patient
ewait = waitbar(0,'Running Ellipsoid Optimisation (Status can be observed in command window)');
% Define the Optimization Options
options = optimset(...
'Algorithm', EOPTDATA.Algorithm,...
'Display', 'Iter',...
'HessUpdate', 'bfgs',...
'Diagnostics', 'on',...
'Gradobj', 'off',...
'TolX', EOPTDATA.TolX,...
'TolFun', EOPTDATA.TolFun,...
'TolCon', EOPTDATA.TolCon,...
'MaxFunEval', EOPTDATA.MaxFunEval,...
'MaxIter', EOPTDATA.MaxIter);
% Update the wait bar
waitbar(0.25,ewait);
% Run the Optimization with every two points
[xopt, fopt, exitflag] = fmincon(@ELLIPSOID_TOOL_optimisation_function,...
EOPTDATA.Initial_Guess,...
[],[],...
[],[],...
EOPTDATA.Lower_Bounds, EOPTDATA.Upper_Bounds,...
[],...
options,...
EOPTDATA.points(1:2:end,:));
% Update the wait bar
waitbar(0.85,ewait);
% Optimisation has been run, the ribcage datastructure is to be updated
% Create the initial data
REDATA.Centre = xopt(1,1:3);
REDATA.Axes = xopt(1,4:6);
% Position of TS & AI in thorax reference system
TS = BLDATA.Initial_Points.TS;
AI = BLDATA.Initial_Points.AI;
%--------------------------------------------------------------------------
% The Scaling Factor is one of the roots of a sixth order polyomial. The
% polynomial is obtained from the equation and must be a positive real
% root.
% (TSx - Ex)^2 (TSy - Ey)^2 (TSz - Ez)^2
% ------------ + ------------ + ------------ - 1 = 0
% (A + sf)^2 (B + sf)^2 (C + sf)^2
%
% Required Data
TSx = TS(1); TSy = TS(2); TSz = TS(3);
A = REDATA.Axes(1); B = REDATA.Axes(2); C = REDATA.Axes(3);
Xo = REDATA.Centre(1); Yo = REDATA.Centre(2); Zo = REDATA.Centre(3);
% The Polynomial Coefficients are given by
P6 = - 1;
P5 = - 2*(A + B + C);
P4 = ((TSx - Xo)^2 + (TSy - Yo)^2 + (TSz - Zo)^2 - (C^2 + 4*C*B + B^2) - 4*(C + B)*A - A^2);
P3 = (2*(TSx - Xo)^2*(C + B) + 2*(TSy - Yo)^2*(A+C) + 2*(TSz - Zo)^2*(A + B) - 2*(C^2*B + B^2*C) - 2*(C^2 + 4*C*B + B^2)*A - 2*(C + B)*A^2);
P2 = ((TSx - Xo)^2*(B^2 + C^2 + 4*C*B) + (TSy - Yo)^2*(C^2 + 4*A*C + A^2) + (TSz - Zo)^2*(A^2 + 4*A*B + B^2) - C^2*B^2 - 4*(C^2*B + C*B^2)*A - (C^2 + 4*C*B + B^2)*A^2);
P1 = (2*(TSx - Xo)^2*(B^2*C + C^2*B) + 2*(TSy - Yo)^2*(A^2*C + C^2*A) + 2*(TSz - Zo)^2*(A^2*B + B^2*A) -2*C^2*B^2*A - 2*(C^2*B + C*B^2)*A^2);
P0 = (TSx - Xo)^2*C^2*B^2 + (TSy - Yo)^2*A^2*C^2 + (TSz - Zo)^2*A^2*B^2 - A^2*B^2*C^2;
% Get the Roots
TS_Scale_Roots = roots([P6, P5, P4, P3, P2, P1, P0]);
% Extract the Positive Root only
idx = find(abs(imag(TS_Scale_Roots)) < 1.e-6);
idxx = find(real(TS_Scale_Roots(idx)) > 0);
TSsf = TS_Scale_Roots(idx(idxx),1);
% Save The Data
REDATA.TSscale = TSsf;
REDATA.TSaxes = [A + TSsf; B + TSsf; C + TSsf];
%--------------------------------------------------------------------------
% The Scaling Factor is one of the roots of a sixth order polyomial. The
% polynomial is obtained from the equation and must be a positive real
% root.
% (AIx - Ex)^2 (AIy - Ey)^2 (AIz - Ez)^2
% ------------ + ------------ + ------------ - 1 = 0
% (A + sf)^2 (B + sf)^2 (C + sf)^2
%
% Required Data
AIx = AI(1); AIy = AI(2); AIz = AI(3);
% The Polynomial Coefficients are given by
P6 = - 1;
P5 = - 2*(A + B + C);
P4 = ((AIx - Xo)^2 + (AIy - Yo)^2 + (AIz - Zo)^2 - (C^2 + 4*C*B + B^2) - 4*(C + B)*A - A^2);
P3 = (2*(AIx - Xo)^2*(C + B) + 2*(AIy - Yo)^2*(A+C) + 2*(AIz - Zo)^2*(A + B) - 2*(C^2*B + B^2*C) - 2*(C^2 + 4*C*B + B^2)*A - 2*(C + B)*A^2);
P2 = ((AIx - Xo)^2*(B^2 + C^2 + 4*C*B) + (AIy - Yo)^2*(C^2 + 4*A*C + A^2) + (AIz - Zo)^2*(A^2 + 4*A*B + B^2) - C^2*B^2 - 4*(C^2*B + C*B^2)*A - (C^2 + 4*C*B + B^2)*A^2);
P1 = (2*(AIx - Xo)^2*(B^2*C + C^2*B) + 2*(AIy - Yo)^2*(A^2*C + C^2*A) + 2*(AIz - Zo)^2*(A^2*B + B^2*A) -2*C^2*B^2*A - 2*(C^2*B + C*B^2)*A^2);
P0 = (AIx - Xo)^2*C^2*B^2 + (AIy - Yo)^2*A^2*C^2 + (AIz - Zo)^2*A^2*B^2 - A^2*B^2*C^2;
% Get the Roots
AI_Scale_Roots = roots([P6, P5, P4, P3, P2, P1, P0]);
% Extract the Positive Root only
idx = find(abs(imag(AI_Scale_Roots)) < 1.e-6);
idxx = find(real(AI_Scale_Roots(idx)) > 0);
AIsf = AI_Scale_Roots(idx(idxx),1);
% Save The Data
REDATA.AIscale = AIsf;
REDATA.AIaxes = [A + AIsf; B + AIsf; C + AIsf];
% Update the wait bar and close it
waitbar(1, ewait);
delete(ewait);
% Display a warning if the optimisation procedure was not successful!
if exitflag < 1
warndlg('The Optimisation was Unsuccessful. See MATLAB command line for details');
end
return;
c4science · Help