{"action":"created","issue":{"url":"https://api.github.com/repos/mrdoob/three.js/issues/11499","repository_url":"https://api.github.com/repos/mrdoob/three.js","labels_url":"https://api.github.com/repos/mrdoob/three.js/issues/11499/labels{/name}","comments_url":"https://api.github.com/repos/mrdoob/three.js/issues/11499/comments","events_url":"https://api.github.com/repos/mrdoob/three.js/issues/11499/events","html_url":"https://github.com/mrdoob/three.js/issues/11499","id":235455036,"number":11499,"title":"TrackballControls: Object becomes unresponsive after zooming.","user":{"login":"tejaspchordiya","id":13462858,"avatar_url":"https://avatars2.githubusercontent.com/u/13462858?v=4","gravatar_id":"","url":"https://api.github.com/users/tejaspchordiya","html_url":"https://github.com/tejaspchordiya","followers_url":"https://api.github.com/users/tejaspchordiya/followers","following_url":"https://api.github.com/users/tejaspchordiya/following{/other_user}","gists_url":"https://api.github.com/users/tejaspchordiya/gists{/gist_id}","starred_url":"https://api.github.com/users/tejaspchordiya/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tejaspchordiya/subscriptions","organizations_url":"https://api.github.com/users/tejaspchordiya/orgs","repos_url":"https://api.github.com/users/tejaspchordiya/repos","events_url":"https://api.github.com/users/tejaspchordiya/events{/privacy}","received_events_url":"https://api.github.com/users/tejaspchordiya/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":2,"created_at":"2017-06-13T07:03:09Z","updated_at":"2017-07-31T12:42:53Z","closed_at":null,"body":"In TrackballControls.js, it is observed that when we increase the zoom speed, these lines get executed to adjust the zooming of camera-\r\n\r\n```\r\nfactor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed;\r\nif ( factor !== 1.0 && factor > 0.0 ) {\r\n    _eye.multiplyScalar( factor );\r\n}\r\n```\r\n##### Steps to reproduce:\r\n1. Default zoom speed is 1.2, user increases it to 35.\r\n2. Zoom-in the object. Observe that the object becomes unresponsive after zooming-in to some extent.\r\n\r\n##### Reason for unresponsiveness:\r\nThe zoom factor goes into negative and hence, the if statement never returns true. Hence, camera is not set properly and make 3d object unresponsive."},"comment":{"url":"https://api.github.com/repos/mrdoob/three.js/issues/comments/319056058","html_url":"https://github.com/mrdoob/three.js/issues/11499#issuecomment-319056058","issue_url":"https://api.github.com/repos/mrdoob/three.js/issues/11499","id":319056058,"user":{"login":"tejaspchordiya","id":13462858,"avatar_url":"https://avatars2.githubusercontent.com/u/13462858?v=4","gravatar_id":"","url":"https://api.github.com/users/tejaspchordiya","html_url":"https://github.com/tejaspchordiya","followers_url":"https://api.github.com/users/tejaspchordiya/followers","following_url":"https://api.github.com/users/tejaspchordiya/following{/other_user}","gists_url":"https://api.github.com/users/tejaspchordiya/gists{/gist_id}","starred_url":"https://api.github.com/users/tejaspchordiya/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tejaspchordiya/subscriptions","organizations_url":"https://api.github.com/users/tejaspchordiya/orgs","repos_url":"https://api.github.com/users/tejaspchordiya/repos","events_url":"https://api.github.com/users/tejaspchordiya/events{/privacy}","received_events_url":"https://api.github.com/users/tejaspchordiya/received_events","type":"User","site_admin":false},"created_at":"2017-07-31T12:42:53Z","updated_at":"2017-07-31T12:42:53Z","body":"Any updates on this?"}}
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