<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Mar 29, 2016, at 2:04 PM, Eric Pettersen <<a href="mailto:pett@cgl.ucsf.edu" class="">pett@cgl.ucsf.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">rc(“turn %s%s %d” % (a1.oslIdent(), a2.oslIdent(), angle))</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""></div></blockquote><br class=""></div><div>Sorry, I mis-interpreted what the “one shot” turn does — it turns whole models, not the parts of models on the opposite sides of the bond. You do need “rotation”, e.g.:</div><div><br class=""></div><div>rc(“rotation 0 %s %s” % (a1.oslIdent(), a2.oslIdent()) # set up the bond rotation</div><div>rc(“rotation 0 %d” % angle) # actually rotate the bond</div><div><br class=""></div><div>—Eric</div><div><br class=""></div><br class=""></body></html>