實驗-OpenGL幾何變換

歡。迎下載1c1c歡迎下載#indude<GL/glut.h>voicinit(wcid)CglCl^arCokr(l,Oj1.0,,.OC0.0);glMatrixModetGL_PROJECnO^^gluOrthoiD(-5.0;5.D,-5.Or5.0);//設(shè)置:顯示的范圉是4-5總巾5Q,￥:-5,0~5.。glMatrixModetGL_MODELVIEW);voicg啊SqumneCQ匚)”繪制中心在原點，邊注為2的正方形{SlBegin(GL_POLYGON)：力頓E靛慧投甄t針方向glVertcx2f口1.叱-L。少〃左下點glYert^x2f(1Q匕二明山右下點glYertexZfC1.0FfLOf)；〃右上點qlV白rtex2f(」時一硝；”左上點QlEnd();)voicmyDrawl(void){glClea-(GL_COLOR_BUFFER_B]T);上喟空glLoadldentityfJ;"將當(dāng)前矩陣設(shè)為單位矩陣glCoar3fCl.Oj.0,0?0,0);drawSquaref);〃在原點處繪制邊長為2紅色正方形皿丁百31玳寸(2.0,總必0.。)；//向右移動2單位，向上移動m單位glScakf(1,0,1,54.0);“M和昉向保持不變，'方句放大為原來的匕5倍glCoor3fC0.0r1.0；O.D);出為巴定1^g0;"繪制邊長為端色正方形jLoa也能ntiWU"/將當(dāng)前矩底設(shè)為單位拒陳glTranslatef^.D^-3.0,0.0);。向左移動彈位?向下移動3單位qlSs山可口.5,，件1R)；"2方向保持不變，昉由小為原來的口5倍，彷向觸為原來的L5倍glCoor3fCO.Oj.0,0；1.0);dnawSquaref);〃繪制邊米為工藍(lán)色正方形glFlush();

glClea-{GL_COLOR_BUFFER_BTT)：，，焉空glLoadIdenzity(J："相當(dāng)前矩院設(shè)為單位拒陳glCoor3f(L.Oj0.0f0.0);drawSqjaneQ;〃在原點處繪制邊長為2紅色正方極glP^hMatrix(?"把當(dāng)前矩眸壓火堆棧glTwisImtef⑵“麗移動Z單位，恥移動3單位glScaleF(1.0,1.54.0)：和西方向保持根，向放大為原來的L5倍glCoor3f(0.0^1.0,0.0);drawSqjaneO'"繪制邊長為蜀色正方形glPopMatriO;"O棧彷頂弓領(lǐng)一個拓碑為當(dāng)前^^glT-an&latsf(-2.D,-3.0H0.0);“向左移動彈位，向下移動三單位glScaleF(0.5,1.5.1.D);“2方向保持不變，防而讖小為原蜘0.5倍，肪向做為原來的L5倍glCoorSf(0.0^0.0f1.0);d田胃Squ己用。"/僦］郵為瑞色I(xiàn)E方形glFlush();glutlnt(ftangCj^rgv);glutlntDisplayMode(GLIH^SINGLE|GUJT_FLGB)-glutlnitWimdowPosizionCoTD);glutlnitWindowSizeJ600hSOD);gILitCreateWindow-Semi日庠勘示歷i「)：glutDisplayFunc(mwDrawl);生成圖形：

注意理解：myDrawl()和myDraw2()生成的圖形完全相同，為什么？(4)、綜合示例^include<GL,/gljt.Ii:>glClearCoIcr(1。1.0,1,0；0.0);：glMatrixMode(GL_PROJECnO^J);gluOi-tho2D(-5.Of525&5⑼；〃設(shè)置顯示的范圍是乂二-5?Y.%Y:-5.0-5.0glMatrixMode(GL_MODELVIEW);vcicdEkSqu日間vniG”繪制中心在原點，邊長為2的正方形glB即口(GL_POLYGON^;〃質(zhì)品疑需要按政用方向glVertejcZfC-L.0ff-1.0D;//ST^qlVertezZf若下點glVertesZf(1.0匕LQf)"『右上點glUeirteJcZf(-LOf-OQ;"左上點glM(LglClea^[-QL_COLOK_BUFFER_BIT)；/,靖空glLoadldentiM)；/米當(dāng)前矩陣設(shè)為單位矩陣glPii5hMatrix(j;gIT-ansiatjef(0.0f,2.Of,O-OT);glScaleff3.0j0.5j1.0);glCoor3f(1.0r0.0,Q.O);dnawSqjaneO："上面紅色矩形dPopMatrixQglPii5hMatrix(j;gIT-ansiatjef(-3,0A0A0)；glPii5hMatrix(j;glRjotatef[4i(),0<D.a,1.0);glCoar3f(O.Or1.0,0.03；drawSqjareO;〃中間左菱形glPopMatriscO;glT-an5.latef(3.0,0.0,0.0)■glPushMatrix(j;glKotatef[4i(]r0-0fD.0,1.0);glCooral(0.0,0.7,0.03：drawSquaneO：〃中間中菱形glPopMatri)cO：glTranslatef(3.0,0.0,0.0);glPuEhMatriK(j;glRotatef(45.0,0.0,0.0,1.0);glColorSf(O.0r0.4,0.0);drawSquareQ；〃中間旗形gIPopMatrigIPopMatrix();glT-an：ElateF(D.0;-3.0,0.0);glScaleft^ttJ.Sijl.O);glColor3f(0.0,0,0,1.0);drawSquareQ；〃槍典矩形gIFlush();cilutlnit{aargcj3「gv);glutlnitDisplayMode(GLLFT_S1NGLE|GLUT_FLGB);glutlnitWindowPosi:ion(0r0);glutlnitWindowSize(600F600);01utCreateWindow「幾何登換函數(shù)綜合示例")；glutDisplayFunc(myDraw);glutMainLoop￡J;生成圖形:5.實驗作業(yè):

繪制如下圖形:面；(1)寫一千繪制翱2的區(qū)徽drawDiamond(v&id；;vcicdrawDiamordCvod)〃繪制中心在原幽菱形^iBegin(GL-POL