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<p style="margin-top:0; margin-bottom:0">Hi Neks,</p>
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<p style="margin-top:0; margin-bottom:0">I want to have a thorough understand of the genmap code, especially subroutine "periodic_vtx" and "rec_bisect". Do you know if there are some existing documents that can help me quickly understand those code? </p>
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<p style="margin-top:0; margin-bottom:0">Thanks,</p>
<p style="margin-top:0; margin-bottom:0">Keke </p>
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