demo介绍了旋转物理概念，包括在三维方向，角速度和势头，惯性和扭矩，关于游戏引擎运动学。-demo introduce the spin physics concepts, including in the three-dimensional direction, angular velocity and momentum, inertia and torque, on the game engine kinematics.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002013s ]
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:0.111277s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001045s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001139s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000920s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003104s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000873s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003570s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014719s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001145s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 168006 [ RunTime:0.016435s ]
