function displayNorms(srf,rot1,rot2)

dims=size(srf) 
xDim=dims(1);yDim=dims(2);zDim=dims(3); 

% Display isosurface of  torus and customize it 
hiso=patch(isosurface(srf,0.0),'FaceColor',[1,.75,.65],'EdgeColor','none'); 
view(rot1,rot2); lightangle(45,30); set(gcf,'Renderer','zbuffer'); lighting phong 

%Extract the triangles and vertices 
[f vert]=reducepatch(isosurface(srf,0.0)); 
[X,Y,Z]=meshgrid(1:xDim,1:yDim,1:zDim); 
% Display the normal vectors

[Dxc,Dyc,Dzc]=calculateNormals(srf);
coneplot(X,Y,Z,Dxc,Dyc,Dzc,vert(:,1),vert(:,2),vert(:,3),'quiver');