{"action":"created","issue":{"url":"https://api.github.com/repos/mrdoob/three.js/issues/9264","repository_url":"https://api.github.com/repos/mrdoob/three.js","labels_url":"https://api.github.com/repos/mrdoob/three.js/issues/9264/labels{/name}","comments_url":"https://api.github.com/repos/mrdoob/three.js/issues/9264/comments","events_url":"https://api.github.com/repos/mrdoob/three.js/issues/9264/events","html_url":"https://github.com/mrdoob/three.js/pull/9264","id":163359011,"number":9264,"title":"THREE.SectionHelper class to fake the cutting plane of a sliced geometry","user":{"login":"Wilt","id":2419627,"avatar_url":"https://avatars.githubusercontent.com/u/2419627?v=3","gravatar_id":"","url":"https://api.github.com/users/Wilt","html_url":"https://github.com/Wilt","followers_url":"https://api.github.com/users/Wilt/followers","following_url":"https://api.github.com/users/Wilt/following{/other_user}","gists_url":"https://api.github.com/users/Wilt/gists{/gist_id}","starred_url":"https://api.github.com/users/Wilt/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Wilt/subscriptions","organizations_url":"https://api.github.com/users/Wilt/orgs","repos_url":"https://api.github.com/users/Wilt/repos","events_url":"https://api.github.com/users/Wilt/events{/privacy}","received_events_url":"https://api.github.com/users/Wilt/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":2,"created_at":"2016-07-01T09:43:54Z","updated_at":"2016-07-04T07:56:56Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/mrdoob/three.js/pulls/9264","html_url":"https://github.com/mrdoob/three.js/pull/9264","diff_url":"https://github.com/mrdoob/three.js/pull/9264.diff","patch_url":"https://github.com/mrdoob/three.js/pull/9264.patch"},"body":"This class is very similar to the `THREE.EdgesHelper`. This will draw a mesh with backside material or color set to the passed value. It can be used for faking the cutting plane of a sliced geometry.\r\n\r\nA demonstration here: https://jsfiddle.net/wilt/qo869tb3/"},"comment":{"url":"https://api.github.com/repos/mrdoob/three.js/issues/comments/230228288","html_url":"https://github.com/mrdoob/three.js/pull/9264#issuecomment-230228288","issue_url":"https://api.github.com/repos/mrdoob/three.js/issues/9264","id":230228288,"user":{"login":"Wilt","id":2419627,"avatar_url":"https://avatars.githubusercontent.com/u/2419627?v=3","gravatar_id":"","url":"https://api.github.com/users/Wilt","html_url":"https://github.com/Wilt","followers_url":"https://api.github.com/users/Wilt/followers","following_url":"https://api.github.com/users/Wilt/following{/other_user}","gists_url":"https://api.github.com/users/Wilt/gists{/gist_id}","starred_url":"https://api.github.com/users/Wilt/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Wilt/subscriptions","organizations_url":"https://api.github.com/users/Wilt/orgs","repos_url":"https://api.github.com/users/Wilt/repos","events_url":"https://api.github.com/users/Wilt/events{/privacy}","received_events_url":"https://api.github.com/users/Wilt/received_events","type":"User","site_admin":false},"created_at":"2016-07-04T07:56:56Z","updated_at":"2016-07-04T07:56:56Z","body":"Yes, but in this case the wire-frame helper gives away the fact that it is just painting the inside of the mesh with a color to 'fake' the section surface. Check [this when wire-frame is turned off](https://jsfiddle.net/wilt/qo869tb3/4/). I used this to fake the section plane because calculating the actual intersecting plane/shape is much more work then simply solid painting the inside of the mesh in a solid color and the visual result is the same.\r\n\r\nBut I understand your comment, maybe `THREE.BacksideMaterialHelper` or something would be a more correct name in that respect."}}
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