割と見つかる
>>274 のDirectXのライブラリの作者の方のチョンボか
>>270 の言う通り本人か
http://slapper.sblo.jp/article/38594486.html
https://so-zou.jp/software/tech/library/managed-direct3d/troubleshooting/operation-precision.htm
http://scientistb.blog42.えふしー2.com/blog-entry-148.html
https://qiita.com/mod_poppo/items/9588b6f425ffe4b5c7bf
https://qiita.com/YamadaSan/items/63cdc124c191e3c3fff1
https://qiita.com/yuji_yasuhara/items/0f94f3b60b4525dd1e74