国外游戏开发者杂志1999年第八期配套代码，包含了Jeff Lander的在物理仿真中如何处理摩擦的例子代码--Code of game development magazine in 1999 eighth issue, it including Jeff Lander example code that how to process friction in the physical simulation
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001095s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.101611s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.012937s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002099s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001726s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005649s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001283s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007135s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014967s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001198s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 105779 [ RunTime:0.012025s ]
