The <#7#>gluoncap<#7#> statement is similar to the gluonlink statement. Only the rear of the gluon is ever capped. If both ends need to be centralized it is best to use a CENTRAL gluon. Any horizontal or vertical gluon may be capped but CENTRAL and FLIPPEDCENTRAL gluons will receive caps of size zero. Diagonal gluons may be stemmed but not capped. Examples are:
verbatim11#
Caps may be emboldened and are not printed in phantom mode. The length of the stem of the cap is stemlength and this may be re-set as described in the section on stems (4.3.2). Unlike the case of links both gluonbackx,y and pbackx,y will refer to the end of the cap. The details of the uncapped gluon may be stored prior to issuing the gluoncap command. (and ditto for gluonlengthx,y ). As an exercise try to reproduce the capped example at the conclusion of section 2.10.2 (note that this picture is better drawn using stemmed CENTRAL gluons).