{"action":"opened","issue":{"url":"https://api.github.com/repos/greggman/webgl-fundamentals/issues/106","repository_url":"https://api.github.com/repos/greggman/webgl-fundamentals","labels_url":"https://api.github.com/repos/greggman/webgl-fundamentals/issues/106/labels{/name}","comments_url":"https://api.github.com/repos/greggman/webgl-fundamentals/issues/106/comments","events_url":"https://api.github.com/repos/greggman/webgl-fundamentals/issues/106/events","html_url":"https://github.com/greggman/webgl-fundamentals/issues/106","id":246603700,"number":106,"title":" m4.js Orthographic's description","user":{"login":"2ndwolf","id":18505164,"avatar_url":"https://avatars3.githubusercontent.com/u/18505164?v=4","gravatar_id":"","url":"https://api.github.com/users/2ndwolf","html_url":"https://github.com/2ndwolf","followers_url":"https://api.github.com/users/2ndwolf/followers","following_url":"https://api.github.com/users/2ndwolf/following{/other_user}","gists_url":"https://api.github.com/users/2ndwolf/gists{/gist_id}","starred_url":"https://api.github.com/users/2ndwolf/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/2ndwolf/subscriptions","organizations_url":"https://api.github.com/users/2ndwolf/orgs","repos_url":"https://api.github.com/users/2ndwolf/repos","events_url":"https://api.github.com/users/2ndwolf/events{/privacy}","received_events_url":"https://api.github.com/users/2ndwolf/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-07-30T19:27:46Z","updated_at":"2017-07-30T19:27:46Z","closed_at":null,"body":"Computes a 4-by-4 orthographic projection matrix given the coordinates of the\r\n planes defining the axis-aligned, box-shaped viewing volume.  The matrix\r\ngenerated sends that box to the unit box.  Note that although left and right\r\nare x coordinates and bottom and top are y coordinates, near and far\r\nare not z coordinates, but rather they are distances along the negative\r\nz-axis.  **We assume a unit box extending from -1 to 1 in the x and y\r\ndimensions and from -1 to 1 in the z dimension.**\r\n\r\nThere may be a mistake here, if z dimension used the same unit box as x and y wouldn't we have a phrase more like \"We assume a unit box extending from -1 to 1 in the x, y and z dimensions\"?\r\n\r\nFrom reading the rest, it probably was meant to be:\r\nWe assume a unit box extending from -1 to 1 in the x and y dimensions and from -1 to 0 in the z dimension.\r\n\r\nSame goes for frustum's description."}}
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