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% Copyright (c) 2008 Thomas Yeo and Mert Sabuncu
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%=========================================================================
function [boundaryVec] = ConvertObjVec2Boundary(MARS_sbjMesh, objVec)

% boundaryVec = ConvertObjVec2Boundary(MARS_sbjMesh, objVec)

index = find(objVec, 1); %This is a vertex which is in the object

vertexNbors = MARS_sbjMesh.vertexNbors;
vertexNbors(vertexNbors == 0) = index; % set the empty neighbors of everyone to be a vertex inside the object.

neighbors_outside_object_bool = ~objVec(vertexNbors);
temp = sum(neighbors_outside_object_bool, 1); %now if temp is larger than 0 means you have a neighbor outside the object.

boundaryVec = (temp > 0) & objVec; %Thus you have the set of vertices in the object with neighbors not inside the object.