<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Dear GMSH users and developers,</div><div><br data-mce-bogus="1"></div><div>I have a question about 'Plugin crack' command. <br data-mce-bogus="1"></div><div>In the manual, it is said that 'The elements touching the crack on the “negative” side are modified to use the newly generated vertices'.</div><div>I was wondering how to define the 'negative' side for 2D crack. Is it defined by NormalX, Normal Y and Normal Z, which are the components of normal vector of the crack surface? <br data-mce-bogus="1"></div><div>Thank you very much.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Best ragards,<br data-mce-bogus="1"></div><div>Xiaoxin<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div></div></body></html>