OpenGL中真实感图形的显示实现.doc

实验名称 OpenGL 中真实感图形的显示实现 1、 实验目的学习基于OpenGL真实感图形显示的原理与实现方法。2、 实验内容利用向导生成应用程序框架，参考示例编写实现三维图形的应用程序，增加光照与材质效果实现真实感图形的显示。3、 实验步骤1.利用向导生成应用程序框架。2.添加相应的函数，绘制立方体（参照上课给的实例）。3.添加相应的函数，实现三维球体的绘制。4.增加光源，并设置光源参数与材质参数，观察显示效果。实验代码及程序运行结果截图如下：/ 2008cube.cpp : Defines the entry point for the console application./#include stdafx.h#include gl/glut.h#include math.hvoid myinit()glClearColor( 1.0, 1.0, 1.0, 0.0); glMatrixMode(GL_PROJECTION); glLoadIdentity();glOrtho(-1.5, 1.5, -1.5, 1.5,-1.5,1.5); void draw_cube()glClear(GL_COLOR_BUFFER_BIT);glColor3f(1.0,0.0,0.0);glBegin(GL_POLYGON);glVertex3f(0.0,0.0,0.0);glVertex3f(0.0,1.0,0.0);glVertex3f(1.0,1.0,0.0);glVertex3f(1.0,0.0,0.0);glEnd();glColor3f(0.0,1.0,0.0);glBegin(GL_POLYGON);glVertex3f(0.0,0.0,0.0);glVertex3f(0.0,1.0,0.0);glVertex3f(0.0,1.0,1.0);glVertex3f(0.0,0.0,1.0);glEnd();glColor3f(0.0,0.0,1.0);glBegin(GL_POLYGON);glVertex3f(0.0,0.0,1.0);glVertex3f(0.0,1.0,1.0);glVertex3f(1.0,1.0,1.0);glVertex3f(1.0,0.0,1.0);glEnd();glColor3f(1.0,1.0,0.0);glBegin(GL_POLYGON);glVertex3f(1.0,0.0,0.0);glVertex3f(1.0,1.0,0.0);glVertex3f(1.0,1.0,1.0);glVertex3f(1.0,0.0,1.0);glEnd();glColor3f(1.0,0.0,1.0);glBegin(GL_POLYGON);glVertex3f(0.0,1.0,0.0);glVertex3f(1.0,1.0,0.0);glVertex3f(1.0,1.0,1.0);glVertex3f(0.0,1.0,1.0);glEnd();void display()glClear( GL_COLOR_BUFFER_BIT); glColor3f(1.0,0.0,0.0);gluLookAt(0.5,0.5,0.0,1.0,1.0,1.0,1.0,0.0,1.0);glutWireCube(0.5);draw_cube(); glFlush(); void main(int argc, char* argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);glutInitWindowSize(300,300);glutCreateWindow(立方体的绘制);glutDisplayFunc(display);myinit();glutMainLoop();/ 2008sphere.cpp : Defines the entry point for the console application./#include stdafx.h#include gl/glut.h#include math.h#define M_PI 3.1415926void draw_sphere()double c=M_PI/180.0;float phi,phir,theta,thetar,x,y,z,phir20;glColor3f(1.0,1.0,1.0);for(phi=-10.0;phi100.0;phi+=4.0)phir=c*phi;phir20=c*(phi+20);glBegin(GL_QUAD_STRIP);for(theta=-200.0;theta=200.0;theta+=1.0)thetar=c*theta;x=sin(thetar)*cos(phir);y=cos(thetar)*cos(phir);z=sin(phir);glVertex3d(x,y,z);x=sin(thetar)*cos(phir20);y=cos(thetar)*cos(phir20);z=sin(phir20);glVertex3d(x,y,z);glEnd();glBegin(GL_TRIANGLE_FAN);glVertex3d(0.0,0.0,0.0);c=M_PI/180;double c80=c*80;z=sin(c80);for(theta=-200;theta=200;theta+=1.0)thetar=c*theta;x=sin(thetar)*cos(c80);y=cos(thetar)*cos(c80);glVertex3d(x,y,z);glEnd();glBegin(GL_TRIANGLE_FAN);glVertex3d(0.0,0.0,-1.0);z=-sin(c80);for(theta=-200;theta=200;theta+=1.0)thetar=c*theta;x=sin(thetar)*cos(c80);y=cos(thetar)*cos(c80);glVertex3d(x,y,z);glEnd();void display()glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW);glLoadIdentity(); GLfloat ball_specular=1.0, 1.0, 1.0, 1.0; GLfloat ball_diffuse=1.0, 1.0, 1.0, 8.0; GLfloat ball_ambient=1.0, 1.0, 1.0, 2.0; GLfloat ball_shininess=100.0; GLfloat light_ambient=0.0, 0.0, 0.0, 1.0; GLfloat light_diffuse=1.0, 1.0, 1.0, 1.0; GLfloat light_specular=2.0, 1.0, 1.0, 0.0; GLfloat light_position=2.0, 2.0, 2.5, 2.5; glLightfv(GL_LIGHT0, GL_POSITION, light_position); glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular); glMaterialfv(GL_FRONT, GL_SPECULAR, ball_specular); glMaterialfv(GL_FRONT, GL_AMBIENT, ball_ambient); glMaterialfv(GL_FRONT, GL_DIFFUSE, ball_diffuse); glMaterialf(GL_FRONT, GL_SHININESS,ball_shininess); glShadeModel(GL_SMOOTH); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST); glClearColor (0.0, 0.0, 0.0, 1.0); glColor3f (1.0, 1.0, 1.0); glEnable(GL_NORMALIZE); glEnable(GL_CULL_FACE); glCullFace(GL_BACK); draw_sphere();glEnd(); glFlush();void init()glClearColor( 0.0, 0.0,0.0, 0.0); glColor3f(0.0,0.0,0.0); glOrtho(-5.0, 5.0, -5.0, 5.0,-5.0,5.0); void reshape(int w,int h)glViewport(0,0,w,h);glMatrixMode(GL_PROJECTION);glLoadIdentity();glOrtho(-1.5,1.5,-1.5,1.5,-1.5,1.5);int main(int argc, char* argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_SIN