<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi Tianming,<div class=""><br class=""></div><div class=""> Each time you click to erase a part of the map it logs a command that gives the center position and radius of the sphere, for example,</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span><a href="cxcmd:volume erase #1%20center%20203.25,197.44,171.69%20radius%2029.616" style="font-family: "Times New Roman"; font-size: medium; font-variant-ligatures: normal; font-weight: 700; orphans: 2; widows: 2; background-color: rgb(221, 221, 221);" class="">volume erase #1 center 203.25,197.44,171.69 radius 29.616</a><br class=""><div><br class=""></div><div>If you want the center position without actually erasing a tricky way to do that is to use the "measure rotation" command. If model #1 is the map and #2 is the eraser sphere then this would to it</div><div><br class=""></div></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;" class=""><div class=""><div><div class="cxcmd" style="font-weight: bold; margin-top: 0.5em; background-color: rgb(221, 221, 221); font-family: "Times New Roman"; font-size: medium; font-variant-ligatures: normal; orphans: 2; widows: 2; text-decoration-thickness: initial;"><div class="cxcmd_as_cmd" style="display: inline;"><a href="cxcmd:measure rotation #2%20toModel%20#1" class="">measure rotation #2 toModel #1</a></div></div></div></div><div class=""><div><span style="font-family: "Times New Roman"; font-size: medium; font-variant-ligatures: normal; orphans: 2; widows: 2; text-decoration-thickness: initial;" class="">Position of eraser sphere #2 relative to emdb 31605 #1 coordinates:</span></div></div><div class=""><div><span style="font-family: "Times New Roman"; font-size: medium; font-variant-ligatures: normal; orphans: 2; widows: 2; text-decoration-thickness: initial;" class="">Matrix rotation and translation</span></div></div><div class=""><div><span style="font-family: "Times New Roman"; font-size: medium; font-variant-ligatures: normal; orphans: 2; widows: 2; text-decoration-thickness: initial;" class="">1.00000000 0.00000000 0.00000000 203.24973595</span></div></div><div class=""><div><span style="font-family: "Times New Roman"; font-size: medium; font-variant-ligatures: normal; orphans: 2; widows: 2; text-decoration-thickness: initial;" class="">0.00000000 1.00000000 0.00000000 197.43569648</span></div></div><div class=""><div><span style="font-family: "Times New Roman"; font-size: medium; font-variant-ligatures: normal; orphans: 2; widows: 2; text-decoration-thickness: initial;" class="">0.00000000 0.00000000 1.00000000 171.69176485</span></div></div></blockquote><div class=""><div><div style="orphans: 2; widows: 2;" class=""><font face="Times New Roman" size="3" class=""><br class=""></font></div><div style="orphans: 2; widows: 2;" class=""><font face="Times New Roman" size="3" class="">You can see the center position in the last column of the 3 by 4 matrix output by the command</font></div><div style="orphans: 2; widows: 2;" class=""><font face="Times New Roman" size="3" class=""><br class=""></font></div><div style="orphans: 2; widows: 2;" class=""><font face="Times New Roman" size="3" class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Tom</font></div><div style="orphans: 2; widows: 2;" class=""><font face="Times New Roman" size="3" class=""><br class=""></font></div><blockquote type="cite" class=""><div class="">On Oct 19, 2022, at 7:50 AM, Tianming Qu via ChimeraX-users <<a href="mailto:chimerax-users@cgl.ucsf.edu" class="">chimerax-users@cgl.ucsf.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm; text-align: justify; font-size: 10.5pt; font-family: DengXian;" class=""><span lang="EN-US" class="">Hi ChimeraX developers,<o:p class=""></o:p></span></div><div style="margin: 0cm; text-align: justify; font-size: 10.5pt; font-family: DengXian;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; text-align: justify; font-size: 10.5pt; font-family: DengXian;" class=""><span lang="EN-US" class="">Is there any way I can know the center of the erase sphere in CHimeraX?<o:p class=""></o:p></span></div><div style="margin: 0cm; text-align: justify; font-size: 10.5pt; font-family: DengXian;" class=""><span lang="EN-US" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm; text-align: justify; font-size: 10.5pt; font-family: DengXian;" class=""><span lang="EN-US" class="">Best,<o:p class=""></o:p></span></div><div style="margin: 0cm; text-align: justify; font-size: 10.5pt; font-family: DengXian;" class=""><span lang="EN-US" class="">Tianming<o:p class=""></o:p></span></div></div><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">ChimeraX-users mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="mailto:ChimeraX-users@cgl.ucsf.edu" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">ChimeraX-users@cgl.ucsf.edu</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Manage subscription:</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="https://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users</a></div></blockquote></div><br class=""></div></body></html>