hello I get a problem with igl::isolines(V, F, *z, 5, isoV, isoE), if I want to select the one of the isolines of all the 5 isolines, how can I deal with this problem, can you give me some ideas?

Another question is that how can I use the heat_geo() function do the same thing as the VS and VT is the igl::exact_geodesic(SmoothV, SmoothF, VS, FS, VT, FT, geodis), to calculate the geo dis of the selected vertice to the target VT vertices.

Thanks for your answer to my question, and thanks for your contributions.

Best regards.