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MirrorPoints.m
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MirrorPoints.m
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function [position_MXY position_MXZ position_MYZ position_MO]=MirrorPoints(position,Lb)
% This function is to find four mirror points of interest for original
% point position: N0*3 array
% Lb is the box size
% Returns the coordinates of the mirror points:
% model
% Find mirror points
for i=1:length(position)
if position(i,1)>=0&&position(i,1)<=Lb/2
if position(i,2)>=0&&position(i,2)<=Lb/2
if position(i,3)>=0&&position(i,3)<=Lb/2 % The 1st Octant
position_MXY(i,1)=position(i,1);
position_MXY(i,2)=position(i,2);
position_MXY(i,3)=position(i,3)-Lb;
position_MXZ(i,1)=position(i,1);
position_MXZ(i,2)=position(i,2)-Lb;
position_MXZ(i,3)=position(i,3);
position_MYZ(i,1)=position(i,1)-Lb;
position_MYZ(i,2)=position(i,2);
position_MYZ(i,3)=position(i,3);
position_MO(i,1)=position(i,1)-Lb;
position_MO(i,2)=position(i,2)-Lb;
position_MO(i,3)=position(i,3)-Lb;
else % The 5th Octant
position_MXY(i,1)=position(i,1);
position_MXY(i,2)=position(i,2);
position_MXY(i,3)=position(i,3)+Lb;
position_MXZ(i,1)=position(i,1);
position_MXZ(i,2)=position(i,2)-Lb;
position_MXZ(i,3)=position(i,3);
position_MYZ(i,1)=position(i,1)-Lb;
position_MYZ(i,2)=position(i,2);
position_MYZ(i,3)=position(i,3);
position_MO(i,1)=position(i,1)-Lb;
position_MO(i,2)=position(i,2)-Lb;
position_MO(i,3)=position(i,3)+Lb;
end
else
if position(i,3)>=0&&position(i,3)<=Lb/2 % The 4th Octant
position_MXY(i,1)=position(i,1);
position_MXY(i,2)=position(i,2);
position_MXY(i,3)=position(i,3)-Lb;
position_MXZ(i,1)=position(i,1);
position_MXZ(i,2)=position(i,2)+Lb;
position_MXZ(i,3)=position(i,3);
position_MYZ(i,1)=position(i,1)-Lb;
position_MYZ(i,2)=position(i,2);
position_MYZ(i,3)=position(i,3);
position_MO(i,1)=position(i,1)-Lb;
position_MO(i,2)=position(i,2)+Lb;
position_MO(i,3)=position(i,3)-Lb;
else % The 8th Octant
position_MXY(i,1)=position(i,1);
position_MXY(i,2)=position(i,2);
position_MXY(i,3)=position(i,3)+Lb;
position_MXZ(i,1)=position(i,1);
position_MXZ(i,2)=position(i,2)+Lb;
position_MXZ(i,3)=position(i,3);
position_MYZ(i,1)=position(i,1)-Lb;
position_MYZ(i,2)=position(i,2);
position_MYZ(i,3)=position(i,3);
position_MO(i,1)=position(i,1)-Lb;
position_MO(i,2)=position(i,2)+Lb;
position_MO(i,3)=position(i,3)+Lb;
end
end
else
if position(i,2)>=0&&position(i,2)<=Lb/2
if position(i,3)>=0&&position(i,3)<=Lb/2 % The 2nd Octant
position_MXY(i,1)=position(i,1);
position_MXY(i,2)=position(i,2);
position_MXY(i,3)=position(i,3)-Lb;
position_MXZ(i,1)=position(i,1);
position_MXZ(i,2)=position(i,2)-Lb;
position_MXZ(i,3)=position(i,3);
position_MYZ(i,1)=position(i,1)+Lb;
position_MYZ(i,2)=position(i,2);
position_MYZ(i,3)=position(i,3);
position_MO(i,1)=position(i,1)+Lb;
position_MO(i,2)=position(i,2)-Lb;
position_MO(i,3)=position(i,3)-Lb;
else % The 6th Octant
position_MXY(i,1)=position(i,1);
position_MXY(i,2)=position(i,2);
position_MXY(i,3)=position(i,3)+Lb;
position_MXZ(i,1)=position(i,1);
position_MXZ(i,2)=position(i,2)-Lb;
position_MXZ(i,3)=position(i,3);
position_MYZ(i,1)=position(i,1)+Lb;
position_MYZ(i,2)=position(i,2);
position_MYZ(i,3)=position(i,3);
position_MO(i,1)=position(i,1)+Lb;
position_MO(i,2)=position(i,2)-Lb;
position_MO(i,3)=position(i,3)+Lb;
end
else
if position(i,3)>=0&&position(i,3)<=Lb/2 % The 3rd Octant
position_MXY(i,1)=position(i,1);
position_MXY(i,2)=position(i,2);
position_MXY(i,3)=position(i,3)-Lb;
position_MXZ(i,1)=position(i,1);
position_MXZ(i,2)=position(i,2)+Lb;
position_MXZ(i,3)=position(i,3);
position_MYZ(i,1)=position(i,1)+Lb;
position_MYZ(i,2)=position(i,2);
position_MYZ(i,3)=position(i,3);
position_MO(i,1)=position(i,1)+Lb;
position_MO(i,2)=position(i,2)+Lb;
position_MO(i,3)=position(i,3)-Lb;
else % The 7th Octant
position_MXY(i,1)=position(i,1);
position_MXY(i,2)=position(i,2);
position_MXY(i,3)=position(i,3)+Lb;
position_MXZ(i,1)=position(i,1);
position_MXZ(i,2)=position(i,2)+Lb;
position_MXZ(i,3)=position(i,3);
position_MYZ(i,1)=position(i,1)+Lb;
position_MYZ(i,2)=position(i,2);
position_MYZ(i,3)=position(i,3);
position_MO(i,1)=position(i,1)+Lb;
position_MO(i,2)=position(i,2)+Lb;
position_MO(i,3)=position(i,3)+Lb;
end
end
end
end