OpenGL所有作业简述.doc

第一次绘制简单图像直线、圆.第二次基于OpenGL的地图绘制 #include头文件#include#include#includeusing namespace std ;class MapPoint 自己定义的类public :double longitude ;/经度double latitude ;/纬度;class Polygon 定义多边形的函数，起容器的作用public :vector Points;/多边形的顶点序列;vector polys ;/多边形集合vector ReadMapData (char *filename )/文件名int PointCount ;/计算点的个数vector Polygons;ifstream fs (filename );/寻找filename文件是否为空while (fs .eof ()!=true ) Polygon* poly =new Polygon;/定点个数fsPointCount;/定点个数赋值给fs读入数据cout PointCountendl ;for (int i=0;i p .longitudep .latitude;poly -Points .push_back (p);Polygons.push_back (poly );return Polygons;void display (void )glClear (GL_COLOR_BUFFER_BIT);/用蓝色绘制各省边界glColor3f (0.0,0.0,1.0);/设置正面为填充模式glPolygonMode (GL_BACK,GL_LINE );for (int i=0;i polys .size ();i +)vector Points=polys i-Points ;绘图函数glBegin (GL_LINE_LOOP );/使用闭合曲线方式绘制各省边界for (int j =0;j Points.size ();j +)glVertex3f (Pointsj.longitude ,Pointsj.latitude ,0.0);glEnd ();glFlush ();void init (void)/设置背景颜色glClearColor (1.0,1.0,1.0,0.0);设置图像背景以及图像位置函数/初始化观察值glMatrixMode (GL_PROJECTION );/将矩阵模式设为投影glLoadIdentity (); /对矩阵进行单位化glOrtho (108.0,120.0,30.0,38.0,-2.0,2.0);/构造平行投影矩阵，注意坐标的位置int main(int argc,char*argv)/主函数char *filename=F:/HenanCounty.txt;/文件名与文件目录对应polys=ReadMapData(filename);/读定义的文件给ploysglutInit(&argc,argv);/初始化初始化、创建窗口（标题、位置、大小）、 指示显示窗口的内容；glutInitDisplayMode(GLUT_RGB|GLUT_SINGLE);/单存缓和RGBglutInitWindowPosition(100,100);/窗口位置glutInitWindowSize(450,450); /窗口大小 glutCreateWindow(hello); /窗口标题init();glutDisplayFunc(display);/设置一个函数，当需要画图时，调用该函数glutMainLoop();/进行消息循环return 0;第三次OpenGL几何变换编程 #include#include#includeGLsizei winWidth=600,winHeight=600;/初始化窗口大小对称坐标系GLfloat ywcMin=-200.0,xwcMax=400.0;/设置世界坐标系的显示范围GLfloat xwcMin=-200.0,ywcMax=400.0;void init(void)/初始化glClearColor(1.0,1.0,1.0,0.0);/设置显示窗口的背景颜色为白色class wcpt3D自己定义的类public:GLfloat x, y, z;void rotate3D(wcpt3D P1,wcpt3D p2,GLfloat thetaDegrees)三维旋转变换，绕任意角度设置旋转轴的矢量float vx =(p2.x-P1.x);float vy =(p2.y-P1.y);float vz =(p2.z-P1.z);通过平移旋转平移复合变化序列完成绕任意轴的旋转glTranslated(P1.x,p2.y,P1.z);/移动p1到原始位置glRotatef(thetaDegrees,vx,vy,vz);/通过坐标原点的坐标旋转glTranslated(-P1.x,-P1.y,-P1.z);/移动p1到原点位置三维比例缩放变换绕固定 点void scaled3D (GLfloat sx,GLfloat sy,GLfloat sz,wcpt3D fixedPt)glTranslated(fixedPt.x,fixedPt.y,fixedPt.z);/反平移到原始位置glScalef(sx,sy,sz); /基于原点的比例缩放变换glTranslated(-fixedPt.x,-fixedPt.y,-fixedPt.z); /移动固定点到坐标原点void glutDisplayFcn(void)wcpt3D centroidPt,R_p1,R_p2;centroidPt.x=50;设置中心点位置centroidPt.y=100;centroidPt.z=0;R_p1=centroidPt;R_p2.x=50;R_p2.y=100;R_p2.z=1;wcpt3D p1,p2,fixedPt;p1=R_p1;显示函数p2=R_p2;设置几何变换参数fixedPt=centroidPt;GLfloat tx=0.0,ty=100.0,tz=0;GLfloat sx=0.5,sy=1.0,sz=0.5;GLdouble thetaDegraees=90;glClear(GL_COLOR_BUFFER_BIT);/清空显示窗口glMatrixMode(GL_MODELVIEW);glLoadIdentity();/清空变换矩阵为单位矩阵，恢复原始坐标系环境glColor3f(0.0,0.0,1.0);/设置前景色为蓝色glRecti(50,100,200,150);/变换前显示蓝色矩形glTranslatef(tx,ty,tz);/平移变换执行几何变换scaled3D(sx,sy,sz,fixedPt);/比例缩放变换rotate3D(p1,p2,thetaDegraees);/旋转变换显示变换后几何对象glColor3f(1.0,0.0,0.0);/重新设置前景色为红色glRecti(50,100,200,150);/变换后显示红色矩阵glFinish();void winReshapeFcn(GLint newWidth,GLint newHeight)glMatrixMode(GL_PROJECTION);glLoadIdentity();gluOrtho2D(xwcMin,xwcMax,ywcMin,ywcMax);glClear(GL_COLOR_BUFFER_BIT);void main(int argc,char*argv)/带命令行参数的main函数glutInit(&argc,argv);/ 对GLUT进行初始化主函数glutInitDisplayMode(GLUT_RGB|GLUT_SINGLE);/ 设置显示方式glutInitWindowPosition(50,50);/ 窗口在屏幕中的位置glutInitWindowSize(winWidth,winHeight);/ 窗口的大小glutCreateWindow(三维几何变换实例-OpenGL版符合变换);/根据前面设置的信息创建窗口init();glutDisplayFunc(glutDisplayFcn);/ 设置一个函数，当需要进行画图时，这个函数就会被调用glutReshapeFunc(winReshapeFcn);/进行一个消息循环glutMainLoop();第四次二维观察-红蓝三角形#include typedef GLfloat point2d2;void triangle(point2d a,point2d b,point2d c)glBegin(GL_TRIANGLES);定义三角形函数glVertex2fv(a); glVertex2fv(b);glVertex2fv(c);glEnd();void display(void)point2d v3=-1.0,-0.58,1.0,-0.58,0.0,1.15;glClear(GL_COLOR_BUFFER_BIT);glColor3f(0.0,0.0,1.0);绘图函数glViewport(0,0,300,400); triangle(v0,v1,v2);glColor3f(1.0,0.0,0.0);glViewport(300,0,300,400);glRotatef(90.0,0.0,0.0,1.0); 视区改变 triangle(v0,v1,v2); glFlush();void init()glMatrixMode(GL_PROJECTION);初始化函数glLoadIdentity();gluOrtho2D(-2.0,2.0,-2.0,2.0);glMatrixMode(GL_MODELVIEW);glClearColor(1.0,1.0,1.0,1.0);void main(int argc,char*argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);主函数，显示窗口glutInitWindowSize(600,400); glutCreateWindow(Triangle); glutDisplayFunc(display);init();glutMainLoop();第五次立方体透视投影 #includeGLint winWidth=600,winHeight=600;/初始化窗口大小GLfloat x0=0.0,y0=0.0,z0=5.0;/坐标原点观察坐标系的参数设置GLfloat xref=0.0,yref=0.0,zref=0.0;/参考点GLfloat Vx=0.0,Vy=1.0,Vz=0.0;/向上矢量（Y轴）GLfloat xwMin=-1.0,ywMin=-1.0,xwMax=1.0,ywMax=1.0;GLfloat dnear=1.5,dfar=20.0;void init (void)glClearColor(1.0,1.0,1.0,0.0);gluLookAt(x0,y0,z0,xref,yref,zref,Vx,Vy,Vz);初始化函数glMatrixMode(GL_MODELVIEW);glScalef(2.0,2.0,2.0);glRotatef(45.0,0.0,1.0,1.0);glMatrixMode(GL_PROJECTION);glLoadIdentity();glFrustum(xwMin,xwMax,ywMin,ywMax,dnear,dfar);void displayFcn(void)glClear (GL_COLOR_BUFFER_BIT);显示函数glColor3f(0.0,1.0,0.0);glutSolidCube(1.0);glColor3f(0.0,0.0,0.0);glLineWidth(2.0);glutWireCube(1.0);glFlush();void reshapeFcn(GLint newWidth,GLint newHeight)视口变换函数glViewport(0,0,newWidth,newHeight);winWidth=newWidth;winHeight=newHeight;void main(int argc,char*argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowPosition(200,200);主函数，显示窗口信息glutInitWindowSize(winWidth,winHeight); glutCreateWindow(单位立方体的透视投影); init();glutDisplayFunc(displayFcn);glutReshapeFunc(reshapeFcn);glutMainLoop();第六次 四棱锥和立方体实体模型#include#include#includeusing namespace std;全局变量定义float rtri;float rquad;定点坐标GLfloat points053=0,1,0,-1,-1,1,1,-1,1,1,-1,-1,-1,-1,-1;GLfloatpoints183=1,1,-1,-1,1,-1,-1,1,1,1,1,1,1,-1,1,-1,-1,1,-1,-1,-1,1,-1,-1;面颜色GLfloat Colors043=1,0,0.5,0.5,1,0.5,0.5,0,1,1,1,0;GLfloat Colors163=0,1,0,1,0.5,0,1,0,0,1,1,0,0,0,1,1,0,1;顶点序列int vertice043=0,1,2,0,2,3,0,3,4,0,4,1;int vertice164=0,1,2,3,4,5,6,7,3,2,5,4,7,6,1,0,2,1,6,5,0,3,4,7;void InitGL(GLvoid)glShadeModel(GL_SMOOTH);/阴影模型glClearColor(1.0f,1.0f,1.0f,1.0f);glClearDepth(1.0f);/清楚缓存glEnable(GL_DEPTH_TEST);/开启深度缓存glDepthFunc(GL_LEQUAL);glEnable(GL_COLOR_MATERIAL);glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);/最佳效果校正void CreatePyramid()glBegin (GL_TRIANGLES);/绘线，每三个点连成一个多边形构建三角形函数for (int i=0;i4;i+)glColor3fv(Colors0i);for (int j=0;j3;j+)int VtxId=vertice0ij;/读点序列glVertex3fv(points0VtxId);glEnd();glBegin (GL_QUADS);构底面建glColor3f(1.0f,1.0f,1.0f);for(int i=1;i5;i+)glVertex3fv(points0i);glEnd();void CreateCube()glBegin(GL_QUADS);for(int i=0;i6;i+)构建立方体glColor3fv(Colors1i);for(int j=0;j4;j+) int VtxId=vertice1ij; glVertex3fv(points1VtxId);glEnd();void display(void)glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);glLoadIdentity();glPushMatrix();glTranslatef(-1.5f,0.0f,-6.0f);glRotatef(rtri,0.0f,1.0f,0.0f);CreatePyramid();glLoadIdentity();glTranslatef(1.5f,0.0f,-6.0f);glRotatef(rquad,1.0f,0.0f,0.0f);绘图函数CreateCube();glPopMatrix();rtri+=0.2f;rquad-=0.15f;glutSwapBuffers();void reshape(int width,int height)if (height=0)height =1;glViewport (0,0,width,height);glMatrixMode(GL_PROJECTION);gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity();void main(int argc,char*argv)绘制窗口函数glutInit (&argc,argv);glutInitDisplayMode(GLUT_RGBA|GLUT_DOUBLE);glutInitWindowSize(800,400);glutCreateWindow(PYramid and cube);InitGL();glutDisplayFunc(display);glutReshapeFunc(reshape);glutIdleFunc(display);glutMainLoop();第七次 Bezier曲面曲线绘制#include GLfloat ctrlpoints43=-4.0,-4.0,0.0,-2.0,3.0,0.0,2.0,4.5,0.0,3.0,-3.0,0.0;/一维求值器void init (void)glClearColor(1.0,1.0,1.0,0.0);glShadeModel(GL_FLAT);glMap1f(GL_MAP1_VERTEX_3,0.0,1.0,3,4,&ctrlpoints00);/定义曲线函数glEnable(GL_MAP1_VERTEX_3);/曲线函数激活void display(void)int i;glClear(GL_COLOR_BUFFER_BIT);glColor3f(0.0,0.0,0.0);glLineWidth(2);glBegin(GL_LINE_STRIP);绘制曲线函数for(i=0;i20;i+)glEvalCoord1f(GLfloat) i/20.0);glEnd();glLineWidth(1);glColor3f(0.0,0.0,1.0);glBegin(GL_LINE_STRIP);for(i=0;i4;i+)glVertex3fv(&ctrlpointsi0);glEnd();glFlush();void reshape(int w,int h)/函数指针glViewport(0,0,(GLsizei)w,(GLsizei)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();if(w=h)glOrtho(-5.0,5.0,-5.0*(GLfloat)h/(GLfloat)w,5.0*(GLfloat)h/(GLfloat)w,-5.0,5.0);glMatrixMode(GL_MODELVIEW);glLoadIdentity();int main(int argc,char*argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowSize(500,500);glutInitWindowPosition(100,100);设置绘图函数显示窗口信息glutCreateWindow(argv0);init();glutDisplayFunc(display);glutReshapeFunc(reshape);glutMainLoop();return 0;#includeGLfloat ctrlpoints443=-3,0,4.0,-2,0,2.0,-1,0,0.0,0,0,2.0,-3,1,1.0,-2,1,3.0,-1,1,6.0,0,1,-1.0,-3,2,4.0,-2,2,0.0,-1,2,3.0,0,2,4.0,-3,3,0.0,-2,3,0.0,-1,3,0.0,0,3,0.0;/二维求值器void display(void)int i,j;glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);glColor3f(0.0,0.0,0.0);/图像颜色glPushMatrix();/压入当前矩阵堆栈，入栈glRotatef(85.0,1.0,1.0,1.0);/指定旋转for(j=0;j=20;j+)绘制曲面函数glBegin(GL_LINE_STRIP);/绘制从第一个顶点到最后一个顶点依次相连的一组线段for(i=0;i=20;i+)glEvalCoord2f(GLfloat)i/20.0,(GLfloat)j/20.0);/启动二维计算器glEnd(); glBegin(GL_LINE_STRIP);/在三维空间里生成Beczr曲线for(i=0;i=20;i+)glEvalCoord2f(GLfloat)j/20.0,(GLfloat)i/20.0);glEnd();glPopMatrix();/出栈glFlush();void init(void)glClearColor(1.0,1.0,1.0,0.0);glMap2f(GL_MAP2_VERTEX_3,0,1,3,4,0,1,12,4,&ctrlpoints000);glEnable(GL_MAP2_VERTEX_3);glOrtho(-5.0,5.0,-5.0,5.0,-5.0,5.0);/编程验证几何变换（平移、缩放和旋转）的后指定-先应用的特点int main(int argc,char*argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);绘图函数显示的窗口信息设置glutInitWindowSize(500,500);glutInitWindowPosition(100,100);glutCreateWindow(argv0);init();glutDisplayFunc(display);glutMainLoop();return 0;第八次OpenGL水壶的光照设计#include #includevoid init(void) GLfloat mat_specular=1.0,1.0,1.0,1.0;/材料镜面反射颜色GLfloat mat_shininess=50.0;/镜面指数（光亮度） GLfloat light_position=1.0,1.0,1.0,0.0;/最后一个参数为0表示该光源是directional的。GLfloat white_light=1.0,1.0,1.0,1.0; GLfloat Light_Model_Ambient=0.2,0.2,0.2,1.0;/默认的全局环境光glClearColor (0.0,0.0,0.0,0.0);glShadeModel (GL_SMOOTH);glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular);glMat