Generate source2D and detector2D positions same time instead of seperately...

            if isempty(obj.sourcePos2D) && isempty(obj.detectorPos2D)

                if isempty(obj.landmarkPos3D) || ~obj.isValidLandmarkLabels()

                    optodePos3D = [];

                    nSource = 0;

                    if ~isempty(obj.sourcePos3D)

                        obj.sourcePos2D = project_3D_to_2D(obj.sourcePos3D);

                        optodePos3D = obj.sourcePos3D;

                        nSource = size(optodePos3D,1);

                    end

                    if ~isempty(obj.detectorPos3D)

                        obj.detectorPos2D = project_3D_to_2D(obj.detectorPos3D);

                        optodePos3D = [optodePos3D; obj.detectorPos3D];

                    end

                    if ~isempty(optodePos3D)

                        optodePos2D = project_3D_to_2D(optodePos3D);

                        if nSource ~= 0

                            obj.sourcePos2D = optodePos2D(1:nSource,:);

                        end

                        if size(optodePos3D,1) > nSource

                            obj.detectorPos2D = optodePos2D(nSource+1:end,:);

                        end

                    end

%                     if isfield(obj,'DummyPos3D') & ~isempty(obj.DummyPos3D)

%                         obj.DummyPos2D = obj.DummyPos3D(:,1:2);

%                     end

                else

                     if ~isempty(obj.sourcePos3D) && ~isempty(obj.detectorPos3D)

                        [sphere.label, sphere.theta, sphere.phi, sphere.r, sphere.xc, sphere.yc, sphere.zc] = textread('10-5-System_Mastoids_EGI129.csd','%s %f %f %f %f %f %f','commentstyle','c++');