{"action":"opened","issue":{"url":"https://api.github.com/repos/JP-Ellis/tikz-feynman/issues/21","repository_url":"https://api.github.com/repos/JP-Ellis/tikz-feynman","labels_url":"https://api.github.com/repos/JP-Ellis/tikz-feynman/issues/21/labels{/name}","comments_url":"https://api.github.com/repos/JP-Ellis/tikz-feynman/issues/21/comments","events_url":"https://api.github.com/repos/JP-Ellis/tikz-feynman/issues/21/events","html_url":"https://github.com/JP-Ellis/tikz-feynman/issues/21","id":136361091,"number":21,"title":"[Feature request] Shifted lines","user":{"login":"giordano","id":765740,"avatar_url":"https://avatars.githubusercontent.com/u/765740?v=3","gravatar_id":"","url":"https://api.github.com/users/giordano","html_url":"https://github.com/giordano","followers_url":"https://api.github.com/users/giordano/followers","following_url":"https://api.github.com/users/giordano/following{/other_user}","gists_url":"https://api.github.com/users/giordano/gists{/gist_id}","starred_url":"https://api.github.com/users/giordano/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/giordano/subscriptions","organizations_url":"https://api.github.com/users/giordano/orgs","repos_url":"https://api.github.com/users/giordano/repos","events_url":"https://api.github.com/users/giordano/events{/privacy}","received_events_url":"https://api.github.com/users/giordano/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-02-25T11:31:08Z","updated_at":"2016-02-25T11:31:08Z","closed_at":null,"body":"I've seen sometimes Feynman diagrams with parallel lines drawn between two vertices (see for example https://cnlart.web.cern.ch/cnlart/221/node63.html and http://tex.stackexchange.com/q/121802/31416).  Of course, they can be drawn manually using plain Ti*k*Z code, but it'd be great if this package provided a way to draw lines shifted by a specified amount and to a specified side.\r\n\r\nFor example, the syntax could be something like:\r\n``` latex\r\n[...]\r\na -- b,\r\na -- [shift left=0.1] b,\r\na -- [shift right=0.1] b,\r\n[...]\r\n```\r\n\r\nThis time, I'm sure it's not written how to do this on the manual or on the site `;-)`"}}