<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div>Have a look at this.</div><a href="http://therion.speleo.sk/wiki/doku.php/metapost">http://therion.speleo.sk/wiki/doku.php/metapost</a><div><br></div><div>You will find a symbol which I defined for a stalagmite boss which I guess is what you are talking about.</div><div><br></div><div><pre class="code" style="padding: 0.5em; border: 1px dashed rgb(67, 105, 118); background-color: rgb(247, 249, 250); overflow: auto; line-height: 16px; width: 721px;">def p_u_boss (expr pos,theta,sc,al)=
T:=identity aligned al rotated theta scaled sc shifted pos;
pickup PenD;
p := (0.08u,0.25u)..(0,0.29u)..(-0.08u,0.25u);
q := (0.16u,0.5u)..(0u,0.58u)..(-0.16u,0.5u);
for i=0 upto 9:
thdraw p rotated 36i;
thdraw q rotated 36i;
endfor
p := fullcircle scaled 0.15u;
thdraw p;
enddef;</pre><div>To use a user defined symbol click on type U in the points drop down and then after the U, type in a colon followed by the name of your symbol so, in the case of the above "U:boss"</div></div><div><br><div>
<div style="color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Dave Clucas<br><a href="http://daveclucas.com">daveclucas.com</a><br><a href="http://mycaves.org">mycaves.org</a>.<br><a href="mailto:daveclucas@icloud.com">daveclucas@icloud.com</a><br><br><br><br></div>
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