{"action":"opened","issue":{"url":"https://api.github.com/repos/bjz/cgmath/issues/337","repository_url":"https://api.github.com/repos/bjz/cgmath","labels_url":"https://api.github.com/repos/bjz/cgmath/issues/337/labels{/name}","comments_url":"https://api.github.com/repos/bjz/cgmath/issues/337/comments","events_url":"https://api.github.com/repos/bjz/cgmath/issues/337/events","html_url":"https://github.com/bjz/cgmath/issues/337","id":150356049,"number":337,"title":"Is there a reason why Transform3 isn't implemented for Matrix4?","user":{"login":"mhintz","id":2789742,"avatar_url":"https://avatars.githubusercontent.com/u/2789742?v=3","gravatar_id":"","url":"https://api.github.com/users/mhintz","html_url":"https://github.com/mhintz","followers_url":"https://api.github.com/users/mhintz/followers","following_url":"https://api.github.com/users/mhintz/following{/other_user}","gists_url":"https://api.github.com/users/mhintz/gists{/gist_id}","starred_url":"https://api.github.com/users/mhintz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mhintz/subscriptions","organizations_url":"https://api.github.com/users/mhintz/orgs","repos_url":"https://api.github.com/users/mhintz/repos","events_url":"https://api.github.com/users/mhintz/events{/privacy}","received_events_url":"https://api.github.com/users/mhintz/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-04-22T12:29:03Z","updated_at":"2016-04-22T12:29:03Z","closed_at":null,"body":"Currently, as far as I know the only way to transform a Point3 with a Matrix4 is:\r\n\r\n```rust\r\nPt::from_vec((transform * pt.to_homogeneous()).truncate())\r\n```\r\n\r\nBut there's a perfectly good API for objects which can transform points, `Transform3`.\r\n\r\nThis would be useful for procedural geometry generation applications, where you want to produce vertices for the same shape, translated and rotated to your desired location."}}