鎴戠洰鍓嶅彧鏄皾璇曚嬌鐢ㄤ簡MatrixTransform PositionAttitudeTransform Group Projection Switch 絳夊悇縐嶅姛鑳界殑緇勮妭鐐? 鍦ㄤ粙緇峂atrixTransform 鍜?PositionAttitudeTransform 鑺傜偣鍓?鎴戞兂鍏堜粙緇嶄笅osg褰撲腑鐭╅樀鐨勪竴浜涚浉鍏崇煡璇?
鍏跺疄,鏃犻渶鍏沖績osg鐭╅樀鏄浣曞疄鐜扮殑.浣嗘槸瑕佽浣忕殑鏄痮sg涓噰鐢ㄧ殑宸︿箻鎿嶄綔,鎴戜滑騫蟲椂閲岃璁虹殑鎿嶄綔濡傛棆杞鉤縐葷瓑.
OpenGL鐨? newpos = R* T * oldpos //鍏堟墽琛屽鉤縐?鍚庢墽琛?鏃嬭漿 (鍏ㄥ眬鍧愭爣緋?
osg褰撲腑: newpos =oldpos * T *R //鍏堟墽琛屽鉤縐?鍚庢墽琛屾棆杞?nbsp; (鍏ㄥ眬鍧愭爣緋?
鍥犱負鍦╫sg褰撲腑鐭╅樀鎵ц鐨勬搷浣滃垯鏄鐭╅樀鎿嶄綔.鍥犳涓轟簡璺烵penGL鐨勫垪鐭╅樀鍋氬悓姝?鑰屼笉鍦ㄥ畾涔夌殑鏃跺欏氨鐩稿綋浜庡仛浜嗕竴涓漿緗搷浣?鍗?br>
鍥犳鍦╫sg/State 涓?鍦ㄤ嬌鐢╝pplyModelViewMatrix() osg/State 鏄疧penGL鐘舵佹満鐨勫皝瑁?鏄笌OpenGL浜や簰鐨勭被
Matrix
inline void applyModelViewMatrix(const osg::RefMatrix* matrix) 
{
if (_modelView!=matrix)
{ if (matrix) { _modelView=matrix; glLoadMatrix(matrix->ptr());
} else { _modelView=_identity; glLoadIdentity(); } }
}瀹冩槸鐩存帴浣跨敤glLoadMatrix(matrix)榪涜杞藉叆鐭╅樀鐨?鍥犳瀹冪殑杞疆鍒氬ソ閫傚簲浜哋penGL鍒椾紭鍏堢殑妯″紡.
浣犲彧闇鐗㈣ 鍦∣SG褰撲腑鍙樻崲鐨勬楠ゅ垯鏄乏涔樻搷浣?鍏ㄥ眬鍧愭爣緋?..鍗沖乏杈圭殑鏄厛鎵ц鍙樻崲鐨?
璋堝畬濡備笂鐨勯偅浜涗箣鍚?鎴戜滑鐜板湪鏉ョ湅MatrixTransform 鍜孭ositionAttitudeTransform.
鍙傝冨潗鏍囩郴鏈変笁縐?br> RELATIVE_RF, //鍏ㄥ眬 鐩稿 ()
ABSOLUTE_RF, //灞閮?nbsp; 緇濆 ()
ABSOLUTE_RF_INHERIT_VIEWPOINT //鍩轟簬瑙嗙偣涓涓眬閮ㄥ潗鏍囩郴.寰堝皯鐢ㄥ埌.
MatrixTransform 鏁呭悕 鐭╅樀鍙樻崲鑺傜偣.鍦ㄤ綅浜庡畠鐨勮妭鐐逛箣涓嬬殑鑺傜偣閮藉皢鎸夌収榪欏畠鐨勭煩闃靛彉鎹㈡潵榪涜妯″瀷鍙樻崲鎿嶄綔.鍥犳 MatrixTransform鐨勪富瑕佸姛鑳戒箣涓灝辨槸鎻愪緵妯″瀷鍙樻崲鎿嶄綔..浣犲彧瑕佹牴鎹綘鎵闇瑕佺殑璁劇疆鍏舵ā鍨嬬煩闃靛氨琛?
鍗蟲墽琛?setMatrix() 鍥犳.鏌ョ湅璁＄畻褰撳墠World鐭╅樀鐨勬柟娉曞氨鍙互寰堟竻鏅扮殑鏄庣櫧鍏舵渶鍚庣粨鏋滃氨鏄?
濡傛灉鏄浉瀵圭殑.閭ｄ箞 鍏堟墽琛岃嚜韜殑鍙樻崲,鍦ㄦ墽琛岀埗鑺傜偣鐨勫彉鎹㈡搷浣?榪欑被浼糘penGL涓悗鍐欑殑鍙樻崲鏄厛鎵ц鐨勪竴鏍?鍏ㄥ眬鍧愭爣緋昏冭檻)
鍚﹀垯鏄粷瀵圭殑,閭ｄ箞褰撳墠鐭╅樀灝辨槸鑷韓鐭╅樀
MatrixTransformbool MatrixTransform::computeLocalToWorldMatrix(Matrix& matrix,NodeVisitor*) const{ if (_referenceFrame==RELATIVE_RF) { matrix.preMult(_matrix); } else // absolute { matrix = _matrix; } return true;}PositionAttibuteTransform 灝辨槸浣嶇疆濮挎佽妭鐐?.鍗蟲垜浠彧鍙互璋冩暣璇ヨ妭鐐圭殑鎵鏈夊瀛愮殑浣嶇疆浠ュ強濮挎?,鎴戜滑涔熷厛鏉ョ湅涓涓嬪畠鐨勭煩闃靛彉鎹?
Positonbool PositionAttitudeTransform::computeLocalToWorldMatrix(Matrix& matrix,NodeVisitor*) const{ if (_referenceFrame==RELATIVE_RF) { matrix.preMultTranslate(_position); matrix.preMultRotate(_attitude); matrix.preMultScale(_scale); matrix.preMultTranslate(-_pivotPoint); } else // absolute { matrix.makeRotate(_attitude); matrix.postMultTranslate(_position); matrix.preMultScale(_scale); matrix.preMultTranslate(-_pivotPoint); } return true;}PositionAttibuteTransform 鐨勭煩闃靛彉鎹㈤『搴忕殑鍥哄畾鐨?鍙互璇存槸MatrixTransform鐨勪竴涓壒渚?,鎿嶄綔欏哄簭鎴戝氨涓嶅湪璇﹁皥浜?鍥犱負瀹冪殑鍔熻兘灝辨槸涓轟簡瀹炵幇濮挎佸拰浣嶇疆.榪樻湁緙╂斁絳?
鍥犳 setPivotPoint 灝嗕嬌寰椾箣鍚庣殑鍙樻崲灝嗕細鍩轟簬姝ゅ鉤縐繪搷浣滄墽琛?
閭ｄ箞瀹炵幇涓涓緥瀛愭潵瑙傚療浠栦滑鐨勬晥鏋? 涓嬮潰鐨勪緥瀛愬垯鏄?br><1> 浣跨敤PositionAttitudeTransform 璁劇疆宸﹁竟鐨勭墰. 浣嶇疆浣嶄簬(-10,0,0) 濮挎佷負緇晍杞存棆杞?0搴?
<2> 浣跨敤MatrixTransform 璁劇疆鍙寵竟鐨勭墰, 鍏堟墽琛屽鉤縐繪搷浣?10,0,0) 鍦ㄧ粫z杞存棆杞?0搴?鍥犳浣垮緱榪欏彧鐗涘亸灞忓箷鍐呴儴涓鐐?(浣犵敾涓潗鏍囪醬 鎸夊叏灞鎬濊礬婕旂ず 鍒欏氨鐭ラ亾鐗涘湪涓婇潰浣嶇疆浜?!)
渚嬪瓙osg::Node* createTrans(){ /**//** declare a root node*/ osg::Group* root = new osg::Group; /**//** declare a Position Node*/ osg::PositionAttitudeTransform* posCow = new osg::PositionAttitudeTransform; root->addChild(posCow); /**//** declare a Matrix Node*/ osg::MatrixTransform* matrixCow = new osg::MatrixTransform; root->addChild(matrixCow); osg::Node* cow = osgDB::readNodeFile("cow.osg"); /**//** When use Position Node and the ReferenceFrame is RELATIVE_RF the matrix is Compute Trans(-pivot) * scale * Rotate * Trans(Pos) here the pivot and scale is default,so it means that make rotate firstly. */ posCow->addChild(cow); osg::Quat quat; quat.makeRotate(osg::PI_2,osg::Vec3(0.0,0.0,1.0)); posCow->setAttitude(quat); posCow->setPosition(osg::Vec3(-10,0.0,0.0)); /**//** when use Matrix Node you can set the matrix what you want. here , it make trans firstly and then make rotate. */ matrixCow->addChild(cow); quat.makeRotate(osg::DegreesToRadians(60.0),osg::Vec3(0.0,0.0,1.0)); matrixCow->setMatrix(osg::Matrixd::translate(osg::Vec3(10.0,0.0,0.0))*osg::Matrixd::rotate(quat)); return root;}渚嬪瓙涓嬭澆鍦板潃 : 婧愪唬鐮佷笅杞?/a>
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鍦ㄧ湅浜嗕竴浜涗箣鍚?澶ф浜嗚В浜嗕竴浜涘叧浜嶰penGL娓叉煋綆＄嚎鐨勭煡璇?鐪嬩簡榪欎釜涔嬪悗瀵逛簬OpenGL鐨勫涔犳垜鎯沖簲褰撴槸寰堟湁甯姪.鍏充簬榪欎箞涓綃囩殑鍘熸枃鍒欐槸GLSL-LIGHTSOURCE 鏁欑▼涓涓紑綃囬儴鍒?鍘熸枃鍦板潃:
鏄嫳鏂囩殑..鎴戝湪osgchina鏁欑▼璁哄潧涓婁篃瑙佸埌榪嘑reeSouth澶х墰鐨勪腑鏂囩炕璇?.
鍏充簬娓叉煋綆＄嚎灝嗕粈涔堝憿?鏃犻潪灝辨槸鍦∣penGL鐨勭閬撳綋涓悇涓儴鍒嗙殑鍔熻兘浠ュ強濡備綍鍦ㄧ閬撳綋涓艦鎴愪簡鎴戜滑鎯寵鐨勬渶緇堢殑涓騫呭浘.(鍍忕礌).鑰岀綰垮綋涓殑鎿嶄綔鍙垎涓轟互涓嬪嚑涓儴鍒?
闃舵1. 鎸囧畾鍑犱綍瀵硅薄.
濡?鐐?nbsp;綰?涓夎褰?絳変竴浜涘嚑浣曞浘鍏?.OpenGL緇樺埗鍑犱綍鍥懼厓鐨勬柟娉曟湁浠ヤ笅涓夌:
<1> 涓嬈′竴涓《鐐?鍗充嬌鐢╣lBegin() glVertex() glEnd() 鎸囧畾鍑犱綍瀵硅薄.
<2> 浣跨敤欏剁偣鏁扮粍..濡俫lDrawArrays.glDrawElements.絳?涓嬈℃х殑緇樺埗澶ч噺鍥懼厓.
涓婇潰榪欎袱縐嶆ā寮忓垯鏄珛鍗蟲ā寮?鍗蟲寚瀹氬畬鍥懼厓涔嬪悗浼氳绔嬪嵆娓叉煋.鍗沖皢鎵鏈夋暟鎹彂寰娓叉煋綆＄嚎鍚庣珛鍗寵娓叉煋.
<3>鏄劇ず鍒楄〃妯″紡.瀹冨瓨鍌ㄤ簬OpenGL鏈嶅姟绔?(鎺ユ敹OpenGL鍛戒護鐨勪竴绔?) glNewList glEndList glCallList .
闃舵2 欏剁偣澶勭悊鎿嶄綔:
涓嶇浠ヤ笂鐨勫嚑浣曞璞℃槸濡備綍鎸囧畾鐨?鎵鏈夌殑鍑犱綍鏁版嵁閮藉皢浼氱粡榪囪繖涓樁孌?榪欎釜闃舵璐熻矗鐨勫垯鏄愪釜欏剁偣鐨勬搷浣?
鍦ㄨ繖涓樁孌佃兘鍋氱殑宸ヤ綔鍒欐槸:
1. 欏剁偣鍙樻崲...鏍規嵁妯″瀷瑙嗗浘鍜屾姇褰辯煩闃靛彉鎹?br> 2. 鍏夌収璁＄畻 娉曠嚎鍙樻崲(娉曠嚎鐭╅樀 鏄ā鍨嬬煩闃電殑宸︿笂瑙?*3鐨勯嗙煩闃?鍜屾硶綰胯鏍煎寲
3. 綰圭悊鍧愭爣鍙樻崲.(綰圭悊鐭╅樀)
4.鏉愯川鐘舵?綰圭悊鍧愭爣鐢熸垚?
鑰屾渶閲嶈鐨勫垯鏄彉鎹互鍙婂厜鐓? 姣忎釜欏剁偣鍦ㄨ繖涓樁孌靛垎鍒槸鍗曠嫭澶勭悊鐨?
榪欎釜闃舵鎵鎺ユ敹鍒扮殑鏁版嵁鍒欐槸姣忎釜欏剁偣鐨勫睘鎬х壒寰?.杈撳嚭鍒欐槸鍙樻崲鍚庣殑欏剁偣鏁版嵁.
闃舵3 鍥懼厓緇勮
鍦ㄩ《鐐瑰鐞嗕箣鍚?欏剁偣鐨勫叏閮ㄥ睘鎬ч兘宸茬粡琚‘瀹?鍦ㄨ繖涓樁孌甸《鐐瑰皢浼氭牴鎹簲鐢ㄧ▼搴忛佸線鐨勫浘鍏冭鍒?
GL_POINTS GL_TRIANGLES 絳?灝嗕細琚粍瑁呮垚鍥懼厓
闃舵4 鍥懼厓澶勭悊(瑁佸壀 娑堥殣)
<1>榪欎釜姝ラ絎竴涓墍鍋氱殑搴斿綋鏄鍓搷浣?.浼氬皢鍥懼厓涓庣敤鎴峰畾涔夌殑瑁佸壀騫抽潰 鍗砱lClipPlane 鍜屾ā鍨嬫姇褰辯煩闃墊墍寤虹珛鐨勮鏅瘮杈? 榪欏皢浼氳鍓笖涓㈠純浣嶄簬瑙嗘櫙鍜岃鍓鉤闈㈠閮ㄧ殑鍥懼厓.涓嶅湪浜堜互澶勭悊.
<2> 鍏舵.鑻ユ槸閲囩敤閫忚鎶曞獎 閭ｄ箞.灝嗕細瀵規瘡涓《鐐圭殑x,y z鍧愭爣鍒嗗埆闄や互w.
<3>绱ф帴鐫 鍒欐槸鐢辮鍙ｅ彉鎹㈠皢欏剁偣鍧愭爣鍙樻崲鑷崇獥鍙ｅ潗鏍?
<4> 鎵ц娑堥殣鎿嶄綔
闃舵5 鏍呮牸鍖栨搷浣?/span>
<1>鐢卞浘鍏冨鐞嗕紶閫掕繃鏉ョ殑鍥懼厓鏁版嵁.鍦ㄦ灝嗕細琚垎瑙ｆ垚鏇村皬鐨勫崟鍏冨茍瀵瑰簲甯х紦鍐插尯鐨勫悇涓儚绱?榪欎簺鍗曞厓琚О涔嬩負 鐗囧厓. 涓涓墖鍏冨彲鑳藉寘鍚獥鍙ｅ乏杈?娣卞害 棰滆壊 綰圭悊鍧愭爣絳夊睘鎬?
<2> 鐗囧厓鐨勫睘鎬у垯鏄浘鍏冧笂欏剁偣鏁版嵁絳?span style="COLOR: red">緇忚繃鎻掑?/span>鑰岀‘瀹氱殑..榪欓噷鐢熸垚鐨勭墖鍏冨皢浼氬寘鍚富棰滆壊鍜屾棰滆壊.
glShadeMode() 鍑芥暟鐨勪綔鐢ㄥ皢浼氳繖閲屼綋鐜?鍗充嬌鐢ㄦ彃鍊?騫蟲粦鐫鑹? 鎴栬呬嬌鐢ㄦ渶鍚庝竴涓《鐐歸鑹?騫抽潰鐫鑹?
<3> 鐐瑰 綰垮.澶氳竟褰㈡ā寮?姝ｉ潰鑳岄潰絳変竴浜涚壒寰佷篃灝嗘槸榪欓樁孌靛彂鐢熶綔鐢?
<4> 鍙嶈蛋鏍蜂篃鏄繖涓樁孌佃搗浣滅敤.
闃舵6 鐗囧厓澶勭悊
<1>涓婄汗鐞?閫氳繃綰圭悊鍧愭爣鍙栧緱綰圭悊鍐呭瓨涓浉瀵瑰簲鐨勯鑹?br> <2> 闆懼寲 閫氳繃鐗囧厓璺濈褰撳墠瑙嗙偣浣嶇疆淇敼棰滆壊.
<3> 棰滆壊姹囨?.(榪欎釜涓庢販鍚堝畬鍏ㄤ笉鍚屾蹇?灝?綰圭悊,涓誨畾涔夌殑棰滆壊,闆懼寲鐨勯鑹?嬈￠鑹插厜鐓ч樁孌佃綆楃殑棰滆壊)姹囨諱竴璧?
闃舵7 閫愪釜鐗囧厓鐨勬搷浣?br> <1> 鎵鏈夌殑涓浜涙祴璇?鍍忕礌鎵鏈夋潈 鍓垏(glScissor) Alpha嫻嬭瘯(glAlphaFunc) 妯＄増嫻嬭瘯(glStencilFunc)
娣卞害嫻嬭瘯 (glDephtFunc) 娣峰悎(glBlendFunc)
榪欎簺鎿嶄綔灝嗕細鏈鍚庡獎鍝嶅叾鍦ㄥ撫緙撳啿鍖虹殑棰滆壊鍊?
闃舵8 甯х紦鍐叉搷浣?/span>
<1>榪欎釜闃舵鎵ц甯х紦鍐茬殑鍐欏叆絳夋搷浣滅瓑..鏈鍚庝駭鐢熶簡鏄劇ず鍑烘潵鐨勫儚绱?
glColorMask glStrncilMask glDepthMask glClearDepht glClearStencil glClearColor 絳?灝嗗湪榪欎釜闃舵褰卞搷鍐欏叆鐨勫?
浠ヤ笂鍙槸璁ㄨOpenGL 鍥懼厓緇樺埗鐨勫熀鏈繃紼?閭ｄ箞鍩轟簬鍍忕礌鍥懼儚緇樺埗.鍑犱箮褰㈠悓涔嬩笂..鍙槸鍦ㄥ厜鏍呭寲澶勭悊鍓嶇殑鎿嶄綔涓嶄竴鏍?鍗崇粡榪囧儚绱犺В鐮?鍍忕礌浼犺緭.鏍呮牸鍖?鏈鍚庡艦鎴愮墖鍏?..鐗囧厓涔嬪悗鐨勫鐞嗗畬鍏ㄤ竴鏍?.
鍥犳 鍦ㄧ潃鑹插櫒緙栫▼棰嗗煙..浣犲皢鍙疄鐜?br> Vertex Shader 鏇挎崲 欏剁偣澶勭悊闃舵
Fragment Shader 鏇挎崲 鐗囧厓澶勭悊闃舵
Geometry Shader 鏇挎崲 鍥懼厓緇勮闃舵..
鍥犱負榪欎笁涓樁孌墊墍鍐沖畾閮芥槸鏈閲嶈鏁堟灉鐨勯樁孌?.瀵逛簬榪欎簺鐨勫彲緙栫▼灝嗗甫鏉ラ潪甯稿ぇ鐨勫ソ澶勪互鍙婂彲鎺у埗鐨勬覆鏌?!
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闄勪笂鏈榪戝NEHE 鍐欑殑1-24鐨勪唬鐮?gt;_< 鍐呴儴娉ㄦ湁璇︾粏娉ㄩ噴,濡傛湁浜涘嚱鏁板姛鑳藉彲璇︾湅opengl鏂囨。鍚?nbsp; :涓嬭澆鍦板潃
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lesson_4鐨勫唴瀹瑰湪lesson_3鐨勫熀紜涓婃坊鍔犱簡閮ㄥ垎鍐呭鑰屽啓鎴愮殑.榪欒褰撲腑,灝嗕細浣跨敤鍒版ā鍨嬪彉鎹㈢殑鏃嬭漿鍙樻崲.
鍓嶅嚑嬈?鏇句嬌鐢ㄤ簡glTranslatef(d)鏉ョЩ鍔ㄦā鍨?榪欐灝嗕嬌鐢╣lRotatef 鏉ユ棆杞ā鍨?鑰屼負浜嗙湅鍒頒竴涓姩鐢葷殑鏁堟灉,灝嗘敞鍐屼竴涓┖闂插洖璋冨嚱鏁?浣垮緱瑙掑害涓嶆柇鑷.
#include "openglglut.h"/**//*** opengl 鏁欑▼絎洓璇懼唴瀹?br>** 鍦ㄧ獥鍙ｇ殑宸﹁竟閮ㄥ垎緇樺埗涓涓褰╃殑涓夎褰?瀹冨皢浣跨敤騫蟲粦鐫鑹?br>** 鍦ㄧ獥鍙ｇ殑鍙寵竟閮ㄥ垎緇樺埗涓涓摑鑹茬殑姝ｆ柟褰?瀹冨皢浣跨敤鍗曡皟鐫鑹?br>** 浣垮緱宸﹁竟鐨勪笁瑙掑艦緇昚杞翠笉鍋滄棆杞?br>** 浣垮緱鍙寵竟鐨勬鏂瑰艦緇晉杞翠笉鍋滄棆杞?br>*/double yRot=0.0; //涓夎褰㈢粫y杞存棆杞殑瑙掑害double xRot=0.0; //涓夎褰㈢粫x杞存棆杞殑瑙掑害int main(int argc, char** argv){ /**//** 鍒濆鍖栫獥鍙?nbsp;騫跺垱寤虹獥鍙?/span>*/ createWindow("opengl lesson_4",&argc,argv); /**//** 娉ㄥ唽glut鐨勪竴浜涘嚱鏁?nbsp;*/ glutReshapeFunc(glutResize); //紿楀彛璋冩暣鍑芥暟 浣垮緱璋冩暣鍚庡浘褰㈡樉紺轟笉鍙戠敓鏀瑰彉 glutIdleFunc(glutIdle); //絀洪棽鍥炶皟鍑芥暟 浣垮緱鍦ㄧ┖闂叉椂闂村唴榪涜涓浜涙搷浣?/span> glutDisplayFunc(glutDisplay); //閲嶇粯鍑芥暟 浣垮緱鍙互鍦ㄧ獥鍙ｄ腑緇樺埗鍥懼艦 glutSpecialFunc(glutSpecial); //鐗規畩鎸夐敭鍑芥暟 浣垮緱瀹炵幇鍏ㄥ睆/紿楀彛鍒囨崲 /**//** 鍒濆鍖杘pengl鐨勪竴浜涙搷浣?/span>*/ InitOpenGL(); /**//** 榪涘叆浠跨湡寰幆*/ glutMainLoop();}/**//** 瀹炵幇澶存枃浠跺綋涓畾涔夌殑緇樺埗鍑芥暟 緇樺埗涓夎褰㈠拰姝ｆ柟褰?nbsp;**/void glutDisplay(void){ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); //灝嗗厛鍒濆鍖栧崟浣嶇煩闃?/span> glPushMatrix(); //灝嗗綋鍓嶇煩闃靛鍒朵竴涓帇鍏ユ爤欏?騫朵繚鎸佸綋鍓嶇煩闃典笉鍙?/span> glTranslatef(-1.5,0.0,-6.0); glRotatef(yRot,0.0,1.0,0.0); //浣垮緱涓夎褰㈢粫y杞存棆杞瑈Rot瑙掑害 //鍐沖畾涓夎褰笁涓《鐐圭殑棰滆壊鍊?涓夎褰㈠唴閮ㄥ悇涓偣鐨勯鑹插皢浼氭槸綰挎ф彃鍊肩殑 glBegin(GL_TRIANGLES); // 緇樺埗涓夎褰?/span> glColor3f(1.0f,0.0f,0.0f); //浣跨敤綰㈣壊緇樺埗涓婇《鐐?/span> glVertex3f( 0.0f, 1.0f, 0.0f); //涓婇《鐐?/span> glColor3f(0.0f,1.0f,0.0f); //浣跨敤緇胯壊緇樺埗宸︿笅欏剁偣 glVertex3f(-1.0f,-1.0f, 0.0f); //宸︿笅 glColor3f(0.0f,0.0f,1.0f); //浣跨敤钃濊壊緇樺埗鍙充笅欏剁偣 glVertex3f( 1.0f,-1.0f, 0.0f); //鍙充笅 glEnd(); glPopMatrix(); //鎭㈠褰撳墠鐭╅樀涓轟笂涓嬈ush鏃剁殑鐭╅樀 glTranslatef(1.5f,0.0f,-6.0f); glRotatef(xRot,1.0,0.0,0.0); //浣垮緱姝ｆ柟褰㈢粫x杞存棆杞瑇Rot瑙掑害 glColor3f(0.0f,0.0f,1.0f); //灝嗗綋鍓嶉鑹插艱緗負钃濊壊 緇樺埗鏁翠釜姝ｆ柟褰?/span> glBegin(GL_QUADS); // 緇樺埗姝ｆ柟褰?/span> glVertex3f(-1.0f, 1.0f, 0.0f); // 宸︿笂 glVertex3f( 1.0f, 1.0f, 0.0f); // 鍙充笂 glVertex3f( 1.0f,-1.0f, 0.0f); // 宸︿笅 glVertex3f(-1.0f,-1.0f, 0.0f); // 鍙充笅 glEnd(); glutSwapBuffers(); //寮哄埗緇樺浘鍛戒護鎵ц緇樺埗鍦ㄧ紦鍐插尯浜ゆ崲鍑烘潵}/**//** 瀹炵幇澶存枃浠跺綋涓０鏄庣殑絀洪棽鍥炶皟鍑芥暟*/void glutIdle(void){ yRot+=0.2f; //澧炲姞涓夎褰㈡棆杞搴?/span> xRot-=0.15f; //鍑忓皯姝ｆ柟褰㈠噺灝戣搴?/span> glutPostRedisplay(); //浣垮緱鎵ц瀹岃鍑芥暟鍚庤皟鐢ㄩ噸緇樺嚱鏁?/span>}鏈緇堢殑緇撴灉鏄?
鏈熬鎬葷粨:
glRotatef(angle,x,y,z) 灝嗕負浣垮緱妯″瀷緇曚換鎰忚醬鏃嬭漿angle瑙掑害.瀹冨皢浼氫駭鐢熶竴涓棆杞煩闃靛彸涔樺綋鍓嶇煩闃?鎵浠ユ敼鍙樹簡褰撳墠鐭╅樀.鑰屼負浜嗕嬌寰楃粯鍒剁殑鏃跺欏乏杈圭殑涓夎褰笉褰卞搷鍒板彸杈規鏂瑰艦鐨勫彉鎹㈢煩闃墊晠鍦ㄧ粯鍒朵笁瑙掑艦涔嬪墠浣跨敤glPushMatrix()淇濆瓨褰撳墠鐭╅樀,緇樺埗瀹屾垚涔嬪悗浣跨敤glPopMatrix() 鎭㈠涔嬪墠鐨勭煩闃?褰撶劧涔熷彲浠ヤ嬌鐢╣lLoadIdentity()璁劇疆褰撳墠鐭╅樀涓哄崟浣嶇煩闃電殑鏂規硶鏉ュ疄鐜板畠..
鍏舵,榪欐澶氫簡浠ヤ釜glIdleFunc() 娉ㄥ唽絀洪棽鍥炶皟鍑芥暟.鍗沖湪緋葷粺娌℃湁鍏朵粬浜嬩歡澶勭悊鐨勬椂鍊欏皢澶勭悊榪欎釜鍑芥暟,浣垮緱鏃嬭漿鐨勮搴︿笉鏂敼鍙?
glPostRedisplay() 浣垮緱褰撳墠紿楀彛灝嗕細榪涜閲嶇粯..鏍規嵁瑙掑害鐨勬敼鍙?浠庤屼嬌寰楁垜浠湅鍒扮殑鏄竴涓棆杞綋涓殑鍔ㄧ敾鏁堟灉
鏈鍚庡皢璇存槑涓鐐圭殑鏄?鎴戞浘鍦ㄧ孩瀹濅功鐪嬪埌涓孌靛唴瀹?鏈夋椂鍊欎負浜嗗疄鐜拌繛緇殑鏃嬭漿,鎴戜滑鍙兘浼氭兂鍒伴噸澶嶅簲鐢ㄤ竴涓煎緢灝忕殑鏃嬭漿鐭╅樀,榪欎釜浼氬瓨鍦ㄤ竴涓棶棰?灝辨槸璇樊,浣垮緱鍙樻崲绱Н緇撴灉.鎴戜滑搴旇鎽掑純榪欑鍋氭硶.鍗充嬌鐢ㄤ竴涓柊鐨勮搴︽潵鍙樻崲.灝卞皢浣跨敤濡備笅鐨勬柟娉?
glLoadIdentity();
glRotatef(new_angle,x,y,z);
鍙new_angle=old_angle+offset
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lesson_2涓?鐭ラ亾浜嗗浣曠畝鍗曠殑緇樺埗鍩烘湰鍥懼艦鐨勫悗,榪欐灝嗚瀛︿範濡備綍浣跨敤glColor3d(f)鏉ヨ緗畂pengl鐘舵佹満涓殑棰滆壊.浣垮緱緇樺埗鏃跺欏皢閲囩敤鑷畾涔夌殑棰滆壊鍊?
#include "openglglut.h"/**//*** opengl 鏁欑▼絎笁璇懼唴瀹?br>** 鍦ㄧ獥鍙ｇ殑宸﹁竟閮ㄥ垎緇樺埗涓涓褰╃殑涓夎褰?瀹冨皢浣跨敤騫蟲粦鐫鑹?br>** 鍦ㄧ獥鍙ｇ殑鍙寵竟閮ㄥ垎緇樺埗涓涓摑鑹茬殑姝ｆ柟褰?瀹冨皢浣跨敤鍗曡皟鐫鑹?br>*/int main(int argc, char** argv){ /**//** 鍒濆鍖栫獥鍙?nbsp;騫跺垱寤虹獥鍙?/span>*/ createWindow("opengl lesson_3",&argc,argv); /**//** 娉ㄥ唽glut鐨勪竴浜涘嚱鏁?nbsp;*/ glutReshapeFunc(glutResize); //紿楀彛璋冩暣鍑芥暟 浣垮緱璋冩暣鍚庡浘褰㈡樉紺轟笉鍙戠敓鏀瑰彉 glutDisplayFunc(glutDisplay); //閲嶇粯鍑芥暟 浣垮緱鍙互鍦ㄧ獥鍙ｄ腑緇樺埗鍥懼艦 glutSpecialFunc(glutSpecial); //鐗規畩鎸夐敭鍑芥暟 浣垮緱瀹炵幇鍏ㄥ睆/紿楀彛鍒囨崲 /**//** 鍒濆鍖杘pengl鐨勪竴浜涙搷浣?/span>*/ InitOpenGL(); /**//** 榪涘叆浠跨湡寰幆*/ glutMainLoop();}void glutDisplay(void){ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); //灝嗗厛鍒濆鍖栧崟浣嶇煩闃?/span> glPushMatrix(); //灝嗗綋鍓嶇煩闃靛鍒朵竴涓帇鍏ユ爤欏?騫朵繚鎸佸綋鍓嶇煩闃典笉鍙?/span> glTranslatef(-1.5,0.0,-6.0); //鍐沖畾涓夎褰笁涓《鐐圭殑棰滆壊鍊?涓夎褰㈠唴閮ㄥ悇涓偣鐨勯鑹插皢浼氭槸綰挎у樊鍊肩殑 glBegin(GL_TRIANGLES); // 緇樺埗涓夎褰?/span> glColor3f(1.0f,0.0f,0.0f); //浣跨敤綰㈣壊緇樺埗涓婇《鐐?/span> glVertex3f( 0.0f, 1.0f, 0.0f); //涓婇《鐐?/span> glColor3f(0.0f,1.0f,0.0f); //浣跨敤緇胯壊緇樺埗宸︿笅欏剁偣 glVertex3f(-1.0f,-1.0f, 0.0f); // 宸︿笅 glColor3f(0.0f,0.0f,1.0f); //浣跨敤钃濊壊緇樺埗鍙充笅欏剁偣 glVertex3f( 1.0f,-1.0f, 0.0f); // 鍙充笅 glEnd(); glPopMatrix(); //鎭㈠褰撳墠鐭╅樀涓轟笂涓嬈ush鏃剁殑鐭╅樀 glTranslatef(1.5f,0.0f,-6.0f); glColor3f(0.0f,0.0f,1.0f); //灝嗗綋鍓嶉鑹插艱緗負钃濊壊 緇樺埗鏁翠釜姝ｆ柟褰?/span> glBegin(GL_QUADS); // 緇樺埗姝ｆ柟褰?/span> glVertex3f(-1.0f, 1.0f, 0.0f); // 宸︿笂 glVertex3f( 1.0f, 1.0f, 0.0f); // 鍙充笂 glVertex3f( 1.0f,-1.0f, 0.0f); // 宸︿笅 glVertex3f(-1.0f,-1.0f, 0.0f); // 鍙充笅 glEnd(); glutSwapBuffers(); //寮哄埗緇樺浘鍛戒護鎵ц緇樺埗鍦ㄧ紦鍐插尯浜ゆ崲鍑烘潵}鏈鍚庣殑鏁堟灉鍥?
鏈熬鎬葷粨:
glColor3f(d)灝嗘寚瀹歰penggl鐘舵佷腑棰滆壊鍊?浣垮緱緇樺埗鐨勬椂鍊欓兘灝嗕嬌鐢ㄨ繖涓鑹插?鐩村埌鍐嶆淇敼榪欎釜鍊?鍦ㄧ粯鍒舵鏂瑰艦鐨勫彲浠ュ緱鍒拌繖涓В閲?
鍏舵, 緇樺埗涓夎褰㈢殑鏃跺?鍙槸鎸囧畾涓変釜欏剁偣鐨勭敤涓夌涓嶅悓棰滆壊緇樺埗,涓轟粈涔堢粨鏋滀細浣垮緱涓夎褰㈠彉鎴愬僵鑹茬殑鍛?
鍏跺師鐞嗗湪浜庡畠浣跨敤浠繪剰涓ょ偣緇樺埗涓鏉＄嚎孌電殑鏃跺?
綰挎鍐呯殑鍏朵粬浠諱竴鐐歸兘灝嗕細鏄繖涓ょ偣棰滆壊鍊肩殑涓涓嚎鎬ф彃鍊?
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鍏舵鎴戞兂璇翠笅 鎴戜負浠涔堟病鏈夊皢glut娉ㄥ唽鍑芥暟閭ｅ潡涔熷畾涔夋垚鍏辯敤鐨?鍥犱負鏈変簺鍑芥暟鎴戝皻鏈疄鐜版垨鑰呭皻鏈冭檻鍒拌濡備綍瀹炵幇,鎬誨湪鍙樺寲鐨?鏁呰屾垜灝嗗畠鍒嗙鍑烘潵浜?鍙互寰堣偗瀹氱殑浜嬫垜闇瑕佷粈涔堝氨娉ㄥ唽浠涔堝嚱鏁?榪欐牱涔熸槸搴旇鏉ヨ姣旇緝娓呮櫚鐨?
nehe lesson_2涓殑鏄疄鐜頒簡鍦ㄧ獥鍙ｅ乏杈圭粯鍒朵竴涓笁瑙掑艦,鍦ㄧ獥鍙ｅ彸杈圭粯鍒朵簡涓涓鏂瑰艦.
#include "openglglut.h"/**//*** opengl 鏁欑▼絎簩璇懼唴瀹?br>** 鍦ㄧ獥鍙ｇ殑宸﹁竟閮ㄥ垎緇樺埗涓涓櫧鑹茬殑涓夎褰?br>** 鍦ㄧ獥鍙ｇ殑鍙寵竟閮ㄥ垎緇樺埗涓涓櫧鑹茬殑姝ｆ柟褰?br>*/int main(int argc, char** argv){ /**//** 鍒濆鍖栫獥鍙?nbsp;騫跺垱寤虹獥鍙?/span>*/ createWindow("opengl lesson_2",&argc,argv); /**//** 娉ㄥ唽glut鐨勪竴浜涘嚱鏁?nbsp;*/ glutReshapeFunc(glutResize); //紿楀彛璋冩暣鍑芥暟 浣垮緱璋冩暣鍚庡浘褰㈡樉紺轟笉鍙戠敓鏀瑰彉 glutDisplayFunc(glutDisplay); //閲嶇粯鍑芥暟 浣垮緱鍙互鍦ㄧ獥鍙ｄ腑緇樺埗鍥懼艦 glutSpecialFunc(glutSpecial); //鐗規畩鎸夐敭鍑芥暟 浣垮緱瀹炵幇鍏ㄥ睆/紿楀彛鍒囨崲 /**//** 鍒濆鍖杘pengl鐨勪竴浜涙搷浣?/span>*/ InitOpenGL(); /**//** 榪涘叆浠跨湡寰幆*/ glutMainLoop();}/**//** 瀹炵幇澶存枃浠跺綋涓畾涔夌殑緇樺埗鍑芥暟 緇樺埗涓夎褰㈠拰姝ｆ柟褰?nbsp;**/void glutDisplay(void){ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); //灝嗗厛鍒濆鍖栧崟浣嶇煩闃?/span> glPushMatrix(); //灝嗗綋鍓嶇煩闃靛鍒朵竴涓帇鍏ユ爤欏?騫朵繚鎸佸綋鍓嶇煩闃典笉鍙?/span> glTranslatef(-1.5,0.0,-6.0); //宸︾Щ鍔?.5騫跺悜灞忓箷鍐呴儴縐誨姩6.0 鍦ㄩ偅鍖哄煙鐢諱笁瑙掑艦 glBegin(GL_TRIANGLES); // 緇樺埗涓夎褰?/span> glVertex3f( 0.0f, 1.0f, 0.0f); // 涓婇《鐐?/span> glVertex3f(-1.0f,-1.0f, 0.0f); // 宸︿笅 glVertex3f( 1.0f,-1.0f, 0.0f); // 鍙充笅 glEnd(); glPopMatrix(); //鎭㈠褰撳墠鐭╅樀涓轟笂涓嬈ush鏃剁殑鐭╅樀 glTranslatef(1.5f,0.0f,-6.0f); //鍙崇Щ鍔?.5騫跺悜灞忓箷鍐呴儴縐誨姩6.0 鍦ㄩ偅鍖哄煙鐢諱笁瑙掑艦 glBegin(GL_QUADS); // 緇樺埗姝ｆ柟褰?/span> glVertex3f(-1.0f, 1.0f, 0.0f); // 宸︿笂 glVertex3f( 1.0f, 1.0f, 0.0f); // 鍙充笂 glVertex3f( 1.0f,-1.0f, 0.0f); // 宸︿笅 glVertex3f(-1.0f,-1.0f, 0.0f); // 鍙充笅 glEnd(); glutSwapBuffers(); //寮哄埗緇樺浘鍛戒護鎵ц緇樺埗鍦ㄧ紦鍐插尯浜ゆ崲鍑烘潵}鏈緇堟樉紺虹粨鏋滀負:
鏈熬鎬葷粨:
浠庝腑鎴戝鍒板浣曠粯鍒秓pengl鐨勫熀鏈浘鍏?涓夎褰?鍥涜竟褰?鐢氳嚦澶氳竟褰?
鍏舵榪樼悊瑙ｄ簡glpushMatrix() glpopMatrix()鐨勫惈涔夊嵆浣跨敤瑙勫垯絳?
glpushMatrix() 淇濆瓨浜嗗綋鍓嶇煩闃?浣垮緱鍏跺悗鍙互鎭㈠鍘熸潵鐨勪綅緗繘琛岀粯鍒?br> glpopMatrix() 鎭㈠褰撳墠鐭╅樀涓烘爤欏剁煩闃?.
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鍏跺疄浠婂ぉ鍦ㄦ葷粨榪欎釜鐨勬椂鍊欙紝騫朵笉鏄湪鐢╫pengl鑰屾槸鍦ㄤ嬌鐢╫sg璁捐涓涓」鐩漢鐗╂苯杞﹁濺絳夋極娓哥被銆婂彲鑳藉簲鐢ㄥ湪鎵嬫満錛屾苯杞﹀鑸笂銆嬬殑鏃跺欙紝鎯寵搗鎬葷粨榪欑殑銆傛垜鍏跺疄鏄兂鐢諱簺鍥炬潵鍐欒繖浠芥葷粨鍙兘浼氭洿瀹規槗鐞嗚В鐨?鐒惰屽疄鍦ㄦ噿...
鍦ㄥ浘褰㈠鐨勬樉紺烘祦紼嬶細
涓夌淮鍥懼艦->妯″瀷瑙嗗浘鍙樻崲->鎶曞獎鍙樻崲->涓夌淮瑁佸壀->瑙嗗彛->灞忓箷鍥懼艦鏄劇ず
涓夌淮->浜岀淮鐨勫彉鎹紝鎬葷殑鏉ョ悊瑙ｅ彧鏄笁緇寸殑鐗╀綋鍦ㄤ竴緋誨垪鐨勫彉鎹箣鍚庡喅瀹氫簡灞忓箷涓婃煇浜涘儚绱犱綅緗殑棰滆壊鍊箋傛渶鍚庤繖浜涢鑹茬粍鎴愪簡涓騫呭浘鐢匯傚氨鏄垜浠墍鐪嬪埌寰楁渶緇堝睆騫曚簩緇村浘褰簡銆?/p>
鍦ㄥぇ姒備簡瑙ｈ繖縐嶆祦紼嬩箣鍚庯紝妯″瀷瑙嗗浘鍙樻崲 鏃犵枒灝嗘垚涓哄喅瀹氭垜浠墍灝嗙湅鍒扮殑鍥懼儚鐨勮疆寤撱?/p>
妯″瀷瑙嗗浘鍙樻崲 搴旇鏉ヨ鏄寘鍚袱涓彉鎹㈢殑:妯″瀷鍙樻崲,瑙嗗浘鍙樻崲銆備負浠涔堝皢浠栦滑鍚堝湪涓璧峰憿錛?鍦ㄧ収鐩告満鎴愬儚緋葷粺涓?鑻ュ浐瀹氱浉鏈轟笉鍔ㄧЩ鍔ㄦā鍨嬩細 絳変環浜?/span> 鍥哄畾妯″瀷涓嶅姩縐誨姩鐩告満銆?/p>
鑰冪┒濡備笅鍐呭錛?/p>
glMatrixMode(GL_MODELVIEW); glLoadIdentity(); //褰撳墠鐭╅樀璁劇疆涓哄崟浣嶇煩闃?/p>
glRotatef(45.0f,0.0,0.0,1.0); //鎸塠0.0,0.0,1.0]涓鴻醬鏃嬭漿45搴?/p>
glTranslatef(2.0,2.0,2.0); // 騫崇Щ鑷?[2.0,2.0,2.0] glBegin(...); // 鐢繪煇浜涗笢瑗?br> ... 鏈変袱縐嶆柟寮忕悊瑙ｏ細涓縐嶆槸灞閮ㄥ潗鏍囩郴鐨勭悊瑙ｏ紝涓縐嶆槸鍏ㄥ眬鍧愭爣緋葷殑鐞嗚В銆?/p>
濡傛灉鎸夌収涓婇潰閭ｄ簺鍐呭浠庝笂鍒頒笅鐨勭悊瑙ｇ殑鏂瑰紡灝辨槸灞閮ㄥ潗鏍囩郴鐨勭悊瑙?/span>銆俹pengl鍙樻崲涓婄殑瀹炵幇鍏跺疄鏄釜鐭╅樀鐨勪箻娉曘傛寜鐓у眬閮ㄥ潗鏍囩郴鐨勭悊瑙?涓婇潰浠ｇ爜鐨勫彉鎹㈡槸鎸夌収榪欐牱鐨勯『搴忔墽琛岀殑: 鍏堝皢灞閮ㄥ潗鏍囩郴緇晍杞存棆杞?5搴︼紝鍦ㄥ皢灞閮ㄥ潗鏍囩郴鐨勫師鐐瑰鉤縐昏嚦[2.0,2.0,2.0]錛岀劧鍚庡湪灞閮ㄥ潗鏍囩郴鍐呯敾鐗╀綋銆?/p>
鍋囪 鏃嬭漿姝ラ鐨勭煩闃典負R錛屽鉤縐婚儴鍒嗙殑鐭╅樀涓篢 褰撳墠鐭╅樀涓篊銆?/p>
new_C=old_C*R*T 榪欐槸涓涓煩闃靛彸涔樻搷浣?/p>
鐞嗚涓婃潵璁?榪欏氨鏄竴涓潗鏍囩郴鐨勫彉鎹㈣繃紼嬶紝R*T 榪欎釜鐭╅樀鍏跺疄灝辨槸灝嗗師鍏堢殑鍧愭爣緋誨彉鎹㈠埌鐜板湪鐨勫潗鏍囩郴錛岃繖涓椂鍊欏師鍏堝潗鏍囩郴鐨勭偣p灝嗗彉鎹㈡垚p1,p1=(R*T)*p銆?/p>
鑰屾寜鐓у叏灞鍧愭爣緋葷殑鐞嗚В錛屽畠鐨勫彉鎹㈣繃紼嬪垯鏄浉鍙嶇殑錛岃繖涔熸槸鐩稿綋鐨勫ソ鐞嗚В鐨?鍦ㄥ綋鍓嶄笘鐣屽潗鏍囩郴涓敾濂借鐗╀綋涔嬪悗錛屾垜蹇呴』灝嗗畠縐誨姩鍒版紜殑浣嶇疆銆傞偅蹇呴』寰楀厛騫崇Щ鐗╀綋鍒癧2.0,2.0,2.0],鐒跺悗灝嗙墿浣撶粫z杞存棆杞?5搴︺傝繖鏄竴涓浉鍙嶇殑鍙樻崲榪囩▼錛岀劧鑰岃繖涓笌鍓嶉潰鐨勬槸絳変環鐨?涓轟粈涔堬紵 鑰冭檻涓栫晫鍧愭爣緋諱笅鐐筽錛岀粡榪囧鉤縐繪搷浣滃悗 p11=T*p; 鍦ㄧ粡榪囨棆杞搷浣滃悗 p1=R*P11=R*(T*p) 榪欐槸鐭╅樀鐨勪竴涓乏涔樻搷浣?鍏堝彉鎹㈢殑鍦ㄥ悗闈? 鎵浠ヨnew_C=(old_c*(R*(T))) 宸︿箻 鎵浠ヨ榪欐槸涓涓瓑浠風殑榪囩▼. 涓鑸潵灝嗭紝鎴戜滑鑰冭檻鐨勬椂鍊欐繪槸涓栫晫鍧愭爣緋昏冭檻鏃嬭漿騫崇Щ絳夋搷浣滅殑.鎵浠ュ湪鍐欏彉鎹㈢殑鏃跺欐渶濂界殑鏂瑰紡灝辨槸灝?鍙樻崲姝ラ涓鐩村乏涔橈紝鑰屼唬鐮佷腑鍒欐寜宸︿箻鍚庣粨鏋滅煩闃電殑欏哄簭鍐欎唬鐮併?/p>
鍏舵鍦ㄧ悊瑙ｄ互涓婄殑鍙樻崲榪囩▼涓ā鍨嬪彉鎹㈢殑鍘熺悊錛屾垜浠彲浠ュ緢濂界殑鐞嗚ВgluLookAt(eye,center,up)鐨勮鍥懼彉鎹㈢殑榪囩▼錛岀幇鍦ㄥ彧鑰冭檻妯″瀷涓嶅姩錛岀収鐩告満縐誨姩鐨勮繃紼嬶紝涓旀槸鍦ㄥ叏灞鍧愭爣緋諱笅鐨勭Щ鍔ㄨ繃紼? opengl榛樿鐓х浉鏈烘鏋?鏄鐐瑰湪鍘熺偣 y杞翠負鍚戜笂鏂瑰悜 z杞磋礋鏂瑰悜涓鴻綰挎柟鍚?/span> gluLookAt鐨勭洰鐨勫湪浜庝嬌寰楄鐐圭Щ鍔ㄥ埌eye浣嶇疆 騫剁湅鍚慶enter銆?/span> 鍒檊luLookAt鐨勮繃紼嬪厛騫崇Щ鑷砮ye,鑰宑enter->eye(center鎸囧悜eye)鍒欎負z鏂瑰悜璁句負z(Zx,Zy,Zz),Up鏂瑰悜涓簓杞存柟鍚戯紝y,z鐨勫弶縐垯涓簒杞存柟鍚?鍒欏彧闇灝嗗畠浠兘鏃嬭漿鍒頒綅灝辮浜?/span> 鎵浠ヨ繖涓椂鍊欐ā鍨嬪彉鎹㈢煩闃靛氨涓恒婄浉瀵逛簬妯″瀷鏉ヨ 鐩告満縐誨姩鍒癳ye絳変環浜庢ā鍨嬬Щ鍔ㄥ埌-eye. |Xx Xy Xz 0| |1 0 0 -eyex| |Yx Yy Yz 0| * |0 1 0 -eyey| |Zx Zy Zz 0| |0 0 1 -eyez| |0 0 0 1| |0 0 0 1 |
...
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glEnd();
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鐜伴氳繃瀹冨疄鐜頒竴涓綅浜巣=0騫抽潰鐨勬鏂瑰艦 騫剁粫z杞存棆杞?
/**//** One workaround to this issue is requiring users to always link with the same CRT as GLUT is compiled with. That requires users supply a non-standard option. GLUT 3.7 has its own built-in workaround where the executable's "exit" function pointer is covertly passed to GLUT. GLUT then calls the executable's exit function pointer to ensure that any "atexit" calls registered by the application are called if GLUT needs to exit. Note that the __glut*WithExit routines should NEVER be called directly. To avoid the atexit workaround, #define GLUT_DISABLE_ATEXIT_HACK.***//**//**** That for why define below**/#define GLUT_DISABLE_ATEXIT_HACK #ifdef WIN32 #include <windows.h>#endif#include<gl/gl.h>#include<GL/glut.h>GLfloat angle=0.0;/**//**鏄劇ず鍥炶皟鍑芥暟*/void display(){ //clear the color buffer 鍗蟲瘡甯ф竻灞?/span> glClear(GL_COLOR_BUFFER_BIT); //璁劇疆妯″瀷瑙嗗浘鐭╅樀 glMatrixMode(GL_MODELVIEW); //璁劇疆褰撳墠鐭╅樀涓哄崟浣嶇煩闃?/span> glLoadIdentity(); //灝嗘鏂瑰艦鎸墇杞存棆杞?nbsp;angle瑙掑害 glRotatef(angle,0.0,0.0,1.0); //鐢諱竴涓鏂瑰艦 glBegin(GL_QUADS); glVertex3f(-0.5,-0.5,0.0); glVertex3f(0.5,-0.5,0.0); glVertex3f(0.5,0.5,0.0); glVertex3f(-0.5,0.5,0.0); glEnd(); //glFlush(); //鍙岀紦瀛?nbsp;鏄劇ず涓甯э紝涓嬩竴甯у凡緇忓湪緙撳啿鍖虹敾濂?浜ゆ崲鍑烘潵灝卞ソ //鏈韓甯︽湁涓涓己鍒剁殑glFlush(); glutSwapBuffers();}/**//**絀洪棽鏃墮棿鍥炶皟鍑芥暟*/void idlefunc(){ //瑙掑害鑷 瀹炵幇姝ｆ柟褰㈢殑鏃嬭漿 angle+=1.0; if(angle>=360.0f) angle=0.0; //浣垮緱鍑芥暟鎵ц瀹屾垚鍚庯紝璋冪敤閲嶇粯鍑芥暟 glutPostRedisplay();}/**//**win32 main鍑芥暟*/void main(int argc, char **argv){ //鍒濆鍖?nbsp;glut glutInit(&argc, argv); //鍒濆鍖栨樉紺烘ā寮忎負 RGB 鍜屽弻緙撳啿 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE); //璁劇疆紿楀彛宸︿笂瑙掍綅緗?/span> glutInitWindowPosition(100,100); //璁劇疆紿楀彛鐨勫垵濮嬪寲澶у皬 glutInitWindowSize(512,512); //鍒涘緩涓涓獥鍙ｆ爣棰樹負 "瀛楃涓? glutCreateWindow("3D Tech- GLUT Tutorial"); //娉ㄥ唽鏄劇ず鍥炶皟鍑芥暟 glutDisplayFunc(display); //娉ㄥ唽絀洪棽鏃墮棿鍑芥暟 glutIdleFunc(idlefunc); //璁劇疆澶氳竟褰㈢粯鍒舵ā寮忎負姝ｉ潰錛岀嚎妗嗗紡 glPolygonMode(GL_FRONT,GL_LINE); //榪涘叆浠跨湡寰幆 glutMainLoop();}]]>