锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#20122;&#27954;&#27431;&#27954;&#19968;&#21306;&#44;&#20037;&#20037;&#20037;&#20037;&#57;&#57;&#31934;&#21697;&#22269;&#20135;&#29255;&#44;&#27431;&#32654;&#20122;&#19968;&#21306;&#20108;&#21306;</title><link>http://www.shnenglu.com/AstaTus/category/9491.html</link><description>       -- 澶忓ぉ涓嶇儹銆傘�?/description><language>zh-cn</language><lastBuildDate>Wed, 25 Feb 2009 18:06:20 GMT</lastBuildDate><pubDate>Wed, 25 Feb 2009 18:06:20 GMT</pubDate><ttl>60</ttl><item><title>鐐圭浉瀵逛笌騫抽潰鐨勪綅緗垽鏂殑璇佹槑~</title><link>http://www.shnenglu.com/AstaTus/archive/2009/02/25/74915.html</link><dc:creator>AstaTus</dc:creator><author>AstaTus</author><pubDate>Wed, 25 Feb 2009 13:01:00 GMT</pubDate><guid>http://www.shnenglu.com/AstaTus/archive/2009/02/25/74915.html</guid><wfw:comment>http://www.shnenglu.com/AstaTus/comments/74915.html</wfw:comment><comments>http://www.shnenglu.com/AstaTus/archive/2009/02/25/74915.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/AstaTus/comments/commentRss/74915.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/AstaTus/services/trackbacks/74915.html</trackback:ping><description><![CDATA[闂鑳屾櫙錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;寰堟棭灝辮寰楁暟瀛﹀緢閲嶈錛屼絾鏂屾病鏈夐潤涓嬪績鏉ュソ濂界湅~ 鏈�榪戦噸鍐欓兘D3D妗嗘灦鐨勭粨鏋勶紝鎵撶畻浠庡熀紜�綾諱竴涓釜鍐欒搗銆傘�?br>&nbsp;&nbsp;&nbsp;浠婂ぉ鍐欏埌灝勭嚎鐨勭浉浜わ紝鍦ㄥ皠綰夸笌騫抽潰鐩鎬氦鐨勫垽鏂笂錛岀敱浜庡皠綰跨殑鐨勫崟鏂瑰悜鎬э紝鎵�浠ュ彲鑳藉瓨鍦ㄥ皠綰跨殑鍙嶅悜寤墮暱綰垮拰騫?br>&nbsp;&nbsp;&nbsp;闈㈢浉浜わ紝浣嗘槸姝ｇ湡鐨勫皠綰挎病&nbsp;&nbsp;鏈?nbsp;&nbsp;鍜屽鉤闈㈢浉浜わ紝鎵�浠ヨ錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;騫抽潰鐨勫崟浣嶆硶鍚戦噺:N,錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;灝勭嚎鐨勮搗濮嬬偣錛歄rigin<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;灝勭嚎鐨勬柟鍚戯細Dir<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;濡傛灉Dir錛孨鐨勭偣縐負姝?涓擮rigin鍦ㄥ鉤闈㈢殑鑳岄潰錛屾垨Origin鍦ㄥ鉤闈㈢殑姝ｉ潰錛屼笖Dir錛孨鐨勭偣縐負璐燂紝鍒欎粬浠浉浜?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;鍏朵粬鎯呭喌鍒欎笉鎯充氦<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;浣嗗叧閿槸Origin鍦ㄥ鉤闈㈢殑鍝竴闈㈣鎬庝箞綆楀憿錛熶笅闈㈡潵灝忚瘉涓�涓?br><br>璇佹槑錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;N,Origin,Dir鍧囦負鐭㈤噺錛屽叾浠栦負鏍囬噺<br>&nbsp;&nbsp;騫抽潰鏂圭▼涓?N(x, y, z) = D錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;灝勭嚎鏂圭▼涓?P(t) = Origin + Dir*t;<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;N涓哄鉤闈㈢殑鍗曚綅娉曞悜閲忥紝&nbsp;&nbsp;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;姹侼涓嶰rigin鐨勭偣縐?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;N&#8226;Origin = |N| * |Origin|cos<span style="FONT-FAMILY: symbol">F</span><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;鍥犱負N涓哄崟浣嶅悜閲?鍒欐眰鍑烘潵鐨勫�間負Origin鍚戦噺鍦∟涓婄殑鎶曞獎涓旀湁鏂瑰悜<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(榪欎釜鏈夊悜闀垮害鐩鎬簬褰撹騫抽潰緇忚繃鍘熺偣鏃剁殑鏈夊悜闀垮害錛屾棦D涓?鏃?,(D鐨勫嚑浣曟剰涔夋槸騫抽潰鍒板師鐐圭殑鏈夊悜璺濈錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;鏃涓鴻礋鍒?鍘熺偣鍦ㄥ鉤闈㈣儗闈紝鍙嶄箣鍦ㄥ弽闈?<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;鎵�浠&#8226;Origin&nbsp;+ D涓烘渶鍚嶰rigin鍦ㄦ鐪熺殑鏈夊亸縐葷殑N涓婄殑鎶曞獎鐨勬湁鍚戦暱搴︼紝涓鴻礋鍒欏湪鑳?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;闈紝涓烘鍒欏湪姝ｉ潰<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 璨屼技璁茬殑涓嶆�庝箞娓呮 -_- ~~~ <span style="FONT-FAMILY: symbol"><br></span>
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