三位地形的模拟。由于地形的模拟通常需要大量的数据，在满足视觉效果的前提下，使用LOD技术提高程序速度-three terrain simulation. Because of the topography simulation usually require large amounts of data to meet the visual effects on the premise that the use of technology to improve procedures LOD speed
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001924s ]
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:0.090147s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002297s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002175s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002011s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003693s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002003s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003221s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015055s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.003540s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 292537 [ RunTime:0.001139s ]
