{"action":"created","issue":{"url":"https://api.github.com/repos/bulletphysics/bullet3/issues/26","repository_url":"https://api.github.com/repos/bulletphysics/bullet3","labels_url":"https://api.github.com/repos/bulletphysics/bullet3/issues/26/labels{/name}","comments_url":"https://api.github.com/repos/bulletphysics/bullet3/issues/26/comments","events_url":"https://api.github.com/repos/bulletphysics/bullet3/issues/26/events","html_url":"https://github.com/bulletphysics/bullet3/issues/26","id":23824076,"node_id":"MDU6SXNzdWUyMzgyNDA3Ng==","number":26,"title":"Improve collision performance for convex shapes with many edges (edge-edge case is slow)","user":{"login":"erwincoumans","id":725468,"node_id":"MDQ6VXNlcjcyNTQ2OA==","avatar_url":"https://avatars3.githubusercontent.com/u/725468?v=4","gravatar_id":"","url":"https://api.github.com/users/erwincoumans","html_url":"https://github.com/erwincoumans","followers_url":"https://api.github.com/users/erwincoumans/followers","following_url":"https://api.github.com/users/erwincoumans/following{/other_user}","gists_url":"https://api.github.com/users/erwincoumans/gists{/gist_id}","starred_url":"https://api.github.com/users/erwincoumans/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/erwincoumans/subscriptions","organizations_url":"https://api.github.com/users/erwincoumans/orgs","repos_url":"https://api.github.com/users/erwincoumans/repos","events_url":"https://api.github.com/users/erwincoumans/events{/privacy}","received_events_url":"https://api.github.com/users/erwincoumans/received_events","type":"User","site_admin":false},"labels":[{"id":89503715,"node_id":"MDU6TGFiZWw4OTUwMzcxNQ==","url":"https://api.github.com/repos/bulletphysics/bullet3/labels/performance%20optimization","name":"performance optimization","color":"207de5","default":false}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":2,"created_at":"2013-12-05T22:41:23Z","updated_at":"2018-12-22T20:10:51Z","closed_at":"2018-12-22T20:10:51Z","author_association":"MEMBER","body":"Currently the GPU SAT clipping implementation for convex-convex collision detection only works fast between convexes with few edges, such as boxes and tetrahedra. Many edge-edge tests slows down the simulation a lot.\nWe could add a GJK/EPA style collision detection, with persistent contact caches.\nAnother thing to try it to use the Gauss map optimization, reducing the number of edge-edge cases.\n\nAnother idea is to use an LCP solver for the convex collision detection, see the Lemke solver in GPU Gems 3, chapter 33 for example: http://http.developer.nvidia.com/GPUGems3/gpugems3_ch33.html\n"},"comment":{"url":"https://api.github.com/repos/bulletphysics/bullet3/issues/comments/449595034","html_url":"https://github.com/bulletphysics/bullet3/issues/26#issuecomment-449595034","issue_url":"https://api.github.com/repos/bulletphysics/bullet3/issues/26","id":449595034,"node_id":"MDEyOklzc3VlQ29tbWVudDQ0OTU5NTAzNA==","user":{"login":"erwincoumans","id":725468,"node_id":"MDQ6VXNlcjcyNTQ2OA==","avatar_url":"https://avatars3.githubusercontent.com/u/725468?v=4","gravatar_id":"","url":"https://api.github.com/users/erwincoumans","html_url":"https://github.com/erwincoumans","followers_url":"https://api.github.com/users/erwincoumans/followers","following_url":"https://api.github.com/users/erwincoumans/following{/other_user}","gists_url":"https://api.github.com/users/erwincoumans/gists{/gist_id}","starred_url":"https://api.github.com/users/erwincoumans/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/erwincoumans/subscriptions","organizations_url":"https://api.github.com/users/erwincoumans/orgs","repos_url":"https://api.github.com/users/erwincoumans/repos","events_url":"https://api.github.com/users/erwincoumans/events{/privacy}","received_events_url":"https://api.github.com/users/erwincoumans/received_events","type":"User","site_admin":false},"created_at":"2018-12-22T20:10:51Z","updated_at":"2018-12-22T20:10:51Z","author_association":"MEMBER","body":"OpenCL pipeline is not actively being developed anymore, let's close this."}}
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