三维图形学实验报告

1、精选优质文档-倾情为你奉上实验一1. （1）三角形：#include <glut.h> / glut.h includes gl.h and glu.hvoid init(void) glClearColor(0.0, 0.0, 0.0, 0.0);void reshape(int w, int h) glViewport(0, 0, (GLsizei)w, (GLsizei)h);glMatrixMode(GL_PROJECTION);/ 指定哪一个矩阵是当前矩阵glLoadIdentity();/重置当前指定的矩阵为单位矩阵。gluOrtho2D(-1.0, 1.0, -1.0

2、, 1.0); / The para are: (left, right, bottom, top) 定义二维正交投影矩阵glMatrixMode(GL_MODELVIEW); /指定哪一个矩阵是当前矩阵void display(void) glClear(GL_COLOR_BUFFER_BIT); / Clear the frame bufferglColor3f(0.0, 1.0, 0.0); / Set current color to greenglBegin(GL_POLYGON); / Draw the triangleglVertex2f(-0.7, -0.7);glVertex

3、2f(0.7, -0.7);glVertex2f(0, 0.7);glEnd();glFlush(); / Force to display the new drawings immediatelyint main(int argc, char *argv) glutInit(&argc, argv); / Initialize GLUT function callingsglutInitWindowSize(400, 400);glutInitWindowPosition(200, 100); / in numbers of pixelsglutCreateWindow("

4、Green Triangle");glutDisplayFunc(display); / is created or re-drewinit(); / Invoke this function for initializationglutMainLoop(); / Enter the event processing loopreturn 0; / Indicate normal termination/ (Required by ANSI C)/ 操作，定义事件回调函数（2）点：void display()glClear(GL_COLOR_BUFFER_BIT); / Clear

5、the frame bufferglColor3f(0.0, 1.0, 0.0); / Set current color to greenglPointSize(10.);glBegin(GL_POINTS);glVertex2i(0.5,0.5);glEnd();glFlush(); / Force to display the new drawings immediately（3）线段：void display()glClear(GL_COLOR_BUFFER_BIT); / Clear the frame bufferglColor3f(0.0, 1.0, 0.0); / Set cu

6、rrent color to greenglLineWidth(3.0);glBegin(GL_LINES);glVertex3f(0., 0., 0.);glVertex3f(0., 1., 0.);glEnd();glFlush(); / Force to display the new drawings immediately（4）四边形：void display()glClear(GL_COLOR_BUFFER_BIT); / Clear the frame bufferglColor3f(1.0, 0.0, 0.0); / Set current color to greenglRe

7、ctf(0.6, 0.3, 0.2, 0.8);int vertex1 = 0.6, 0.3;int vertex2 = 0.2, 0.8;glRectiv(vertex1, vertex2);glFlush(); / Force to display the new drawings immediately2. 立方体：3. void reshape(int w, int h)4. 5. glViewport(0, 0, w, h);6. glMatrixMode(GL_PROJECTION);7. glLoadIdentity();8. glOrtho(-3.0, 3.0, -3.0, 3

8、.0, -3.0, 3.0);9. 10. void display()11. glClear(GL_COLOR_BUFFER_BIT); / Clear the frame buffer12. glMatrixMode(GL_MODELVIEW);13. glLoadIdentity();14. gluLookAt(1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);15. glutWireCube(0.5);16. glutSwapBuffers();17. glColor3f(0.0, 1.0, 0.0);18. glBegin(GL_LINE_LO

9、OP); /Green19. glVertex3f(0., 0., 0.); glVertex3f(0., 2, 0.);20. glVertex3f(2, 2, 0.); glVertex3f(2, 0., 0.);21. glEnd();22. glColor3f(1.0, 1.0, 0.0);23. glBegin(GL_LINE_LOOP); /Yellow24. glVertex3f(0., 0., 2); glVertex3f(2, 0., 2);25. glVertex3f(2, 2, 2); glVertex3f(0., 2, 2);26. glEnd();27. glColo

10、r3f(0.0, 1.0, 1.0);28. glBegin(GL_LINES); /Cyan29. glVertex3f(0., 0., 0.); glVertex3f(0., 0., 2);30. glVertex3f(0., 2, 0.); glVertex3f(0., 2, 2);31. glVertex3f(2, 0., 0.); glVertex3f(2, 0., 2);32. glVertex3f(2, 2, 0.); glVertex3f(2, 2, 2);33. glEnd();34. glFlush(); / Force to display the new drawing

11、s immediately3.（1）三角形条带void display()glClear(GL_COLOR_BUFFER_BIT); / Clear the frame bufferGLfloat v0 = 0., 0.3 ,v1 = 0.2, 0.6 ,v2 = 0.4, 0.3 ,v3 = 0.5, 0.6 ,v4 = 0.6, 0.3 ,v5 = 0.8, 0.6 ,glColor3f(1.0);glBegin(GL_TRIANGLE_STRIP);/三角形条带函数glVertex2fv(v0); glVertex2fv(v1);glVertex2fv(v2);glVertex2fv(v

12、3);glVertex2fv(v4);glVertex2fv(v5); glEnd();glFlush(); / Force to display the new drawings immediately3.（2）三角形扇形GLfloat v0 = 0., 0.3 ,v1 = 0.3, 0.7 ,v2 = 0.5, 0.65 ,v3 = 0.5, 0.5,v4 = 0.45, 0.4 ,v5 = 0.3, 0.35 ,glColor3f(1.0);glBegin(GL_TRIANGLE_FAN);/共享一个顶点glVertex2fv(v0);glVertex2fv(v1);glVertex2f

13、v(v2);glVertex2fv(v3);glVertex2fv(v4);glVertex2fv(v5); glEnd();glFlush(); / Force to display the new drawings immediately实验二1.点glColor3f(0.0, 1.0, 0.0);glPointSize(3.);glBegin(GL_POINTS);glVertex3f(0.1, 0.5, 0);glColor3f(1.0, 1.0, 0.0);glPointSize(5.);glBegin(GL_POINTS);glVertex3f(0.5, 0.5, 0);glCol

14、or3f(1.0, 0.0, 0.0);glPointSize(10.);glBegin(GL_POINTS);glVertex3f(0.3, 0.4, 0);glColor3f(0.0, 0.0, 1.0);glPointSize(1.);glBegin(GL_POINTS);glVertex3f(0.2, 0.6, 0);glColor3f(1.0, 1.0, 1.0);glPointSize(4.);glBegin(GL_POINTS);glVertex3f(0.3, 0.5, 0);glEnd();glFlush(); / Force to display the new drawin

15、gs immediately2.直线glColor3f(0.0, 1.0, 0.0);glLineWidth(1.0);glBegin(GL_LINES);glVertex3f(0.3, 0.1, 0.0);glVertex3f(0.3, 0.5, 0.0);/垂直距离glColor3f(1.0, 1.0, 0.0);glLineWidth(3.);/宽度glBegin(GL_LINES);glVertex3f(0.2, 0.1, 0.0);glVertex3f(0.2, 0.5, 0.0);glColor3f(1.0, 0.0, 0.0);glLineWidth(5.);glBegin(GL

16、_LINES);glVertex3f(0.5, 0.1, 0.0);glVertex3f(0.5, 0.5, 0.0);glEnd();glFlush(); / Force to display the new drawings immediately3.直线，虚线，点划线glColor3f(1.0, 0.0, 0.0);glLineWidth(2.0);glBegin(GL_LINES);glVertex2f(0.0, 0.3);glVertex2f(0.8, 0.3);glEnd();glColor3f(1.0, 0.0, 0.0);glEnable(GL_LINE_STIPPLE);gl

17、LineStipple(1, 0x0101);glLineWidth(2.0);glBegin(GL_LINES);glVertex2f(0.0, 0.5);glVertex2f(0.8, 0.5);glEnd(); glColor3f(1.0, 0.0, 0.0); glEnable(GL_LINE_STIPPLE);glLineStipple(1, 0xffcc); glLineWidth(2.0); glBegin(GL_LINES); glVertex2f(0.0, 0.8); glVertex2f(0.8, 0.8);glEnd();4.顶点不同颜色的三角形平滑填充glShadeMo

18、del(GL_SMOOTH);glBegin(GL_TRIANGLES);glColor3f(0.0, 0.0, 1.0);glPointSize(5.0);glVertex2f(0.3, 0.3);glColor3f(1.0, 0.0, 0.0);glPointSize(5.0);glVertex2f(0.4, 0.6);glColor3f(1.0, 1.0, 0.0);glPointSize(5.0);glVertex2f(0.5, 0.4); glEnd();5. 调用glPolygonMode(face, displayMode);glPolygonMode(GL_FRONT_AND_

19、BACK, GL_LINE);6. 两个正方形混合（1）glEnable(GL_BLEND);glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);/混合glColor4f(0.0, 1.0, 0.0,0.5); / Set current color to greenglRectf(0.6, 0.3, 0.2, 0.8);int vertex1 = 0.6, 0.3 ;int vertex2 = 0.2, 0.8 ;glRectiv(vertex1, vertex2); glColor4f(0.0, 0.0, 1.0,0.5); / Set cur

20、rent color to green glRectf(0.5, 0.2, 0.1, 0.5); int vertex3 = 0.5, 0.2 ; int vertex4 = 0.1, 0.5 ; glRectiv(vertex3, vertex4);（2）glEnable(GL_BLEND);glBlendFunc(GL_SRC_ALPHA,GL_ZERO);(3) glEnable(GL_BLEND);glBlendFunc(GL_ONE,GL_ZERO);说明：用函数glBlendFunc(sFactor,dFactor);选择调和因子的值产生不同的混合效果，有GL_ONE，GL_ZER

21、O，GL_SRC_ALPHA GL_DST_ALPHA,GL_ONE_MINUS_SRC_ALPHA等实验三1. 平移 glMatrixMode(GL_MODELVIEW); glColor3f(1.0, 1.0, 0.0); glRectf(0.6, 0.3, 0.2, 0.8);glColor3f(1.0, 0.0, 0.0);glTranslatef(-0.5,-0.3,0.0);glRectf(0.6, 0.3, 0.2, 0.8);旋转：glColor3f(1.0, 1.0, 0.0); glRectf(0.6, 0.3, 0.2, 0.8)glLoadIdentity();glRo

22、tatef(90.0,0.0,0.0,1.0); glRectf(0.6, 0.3, 0.2, 0.8); 缩放：glColor3f(0.0, 1.0, 1.0);glLoadIdentity();glScalef(-0.5, 1.0, 1.0);glRectf(0.6, 0.3, 0.2, 0.8);3.桌子绘制void table()glColor3f(0.0, 1.0, 1.0);glRectf(-0.5, 0.3, 0.5, -0.3);glColor3f(1.0, 1.0, 0.0);glRectf(-0.4, 0.25, 0.4, 0.15);glColor3f(1.0, 1.0,

23、 0.0);glRectf(-0.4, 0.25, -0.3, -0.15);glColor3f(1.0, 1.0, 0.0);glRectf(0.3, 0.25, 0.4, -0.15);glColor3f(1.0, 1.0, 0.0);glRectf(-0.4, -0.15, 0.4, -0.25);glColor3f(1.0, 0.2, 0.0);glRotatef(-45.0, 0.0, 0.0, 1.0);glTranslatef(0.15, 0.35, 0.0);glRectf(-0.3, -0.15, 0.3, -0.25);glLoadIdentity();glColor3f(

24、1.0, 0.2, 0.0);glRotatef(-90, 0.0, 0.0, 1.0);glTranslatef(-0.35, -0.15, 0.0);glRectf(-0.3, -0.15, 0.3, -0.25);glLoadIdentity();glColor3f(1.0, 0.2, 0.0);glRotatef(-90, 0.0, 0.0, 1.0);glTranslatef(-0.65, 0.15, 0.0);glRectf(-0.3, -0.15, 0.3, -0.25);glLoadIdentity();glColor3f(1.0, 0.2, 0.0);glRotatef(-9

25、0, 0.0, 0.0, 1.0);glTranslatef(-0.2, 0.6, 0.0);glRectf(-0.3, -0.15, 0.3, -0.25);void display() glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); / Clear the frame bufferglMatrixMode(GL_MODELVIEW);glPushMatrix();glRotatef(-45.0, 0.0, 0.0, 1.0);table();glPopMatrix(); glFlush(); 4. 编程绘制罗马字母和。：void word

26、()glColor3f(1.0, 1.0, 1.0);glBegin(GL_LINES);glVertex2f(-0.25, 0.3);glVertex2f(-0.2, 0.3); glEnd();glColor3f(1.0, 1.0, 1.0);glBegin(GL_LINES);glVertex2f(-0.25, 0.0);glVertex2f(-0.15, 0.0);glEnd();glColor3f(1.0, 1.0, 1.0);glBegin(GL_LINES);glVertex2f(-0.2, 0.0);glVertex2f(-0.2, 0.3);glEnd();glColor3f

27、(1.0, 1.0, 1.0);glBegin(GL_LINES); glVertex2f(-0.2, 0.3);glVertex2f(-0.1, 0.3);glEnd();glColor3f(1.0, 1.0, 1.0);glBegin(GL_LINES);glVertex2f(0.1, 0.3);glVertex2f(0.2, 0.3);glEnd();void lines()glMatrixMode(GL_MODELVIEW);glLoadIdentity();glColor3f(1.0, 1.0, 1.0);glRotatef(30, 0.0, 0.0, 1.0);glTranslat

28、ef(0.03, 0.04, 0.0);glRectf(-0.01, 0.3, 0, 0); glLoadIdentity();glColor3f(1.0, 1.0, 1.0);glRotatef(-30, 0.0, 0.0, 1.0);glTranslatef(-0.03, 0.04, 0.0); glRectf(0.01, 0.3, 0, 0);：void lines()glMatrixMode(GL_MODELVIEW);glLoadIdentity();glColor3f(1.0, 1.0, 1.0);glRotatef(28, 0.0, 0.0, 1.0);glTranslatef(

29、0.03, 0.0, 0.0);glRectf(-0.01, 0.35, 0, -0.35); glLoadIdentity(); glColor3f(1.0, 1.0, 1.0); glRotatef(-28, 0.0, 0.0, 1.0); glTranslatef(-0.03, 0.0, 0.0); glRectf(0.01, 0.35, 0, -0.35);void word()glMatrixMode(GL_MODELVIEW);glColor3f(1.0, 1.0, 1.0);glBegin(GL_LINES);glVertex2f(-0.2, 0.32);glVertex2f(-

30、0.1, 0.32);glBegin(GL_LINES);glVertex2f(0.1, 0.32);glVertex2f(0.2, 0.32);glEnd();void display() glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); / Clear the frame bufferglPushMatrix();glScalef(1.0, -1.0, 1.0);word();glScalef(1.0, -1.0, 1.0);word();lines();glPopMatrix();glFlush();实验四1. 绘制房子void resh

31、ape(int w, int h)glViewport(0, 0, w, h);glMatrixMode(GL_PROJECTION);glLoadIdentity();glOrtho(-3.0, 3.0, -3.0, 3.0, -3.0, 3.0);void display()glClear(GL_COLOR_BUFFER_BIT); / Clear the frame bufferglMatrixMode(GL_MODELVIEW);glLoadIdentity();gluLookAt(1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);glutSwa

32、pBuffers();glShadeModel(GL_FLAT);glColor3f(1.0, 1.0, 1.0);glBegin(GL_LINE_LOOP); glVertex3f(0.4, -0.4,-0.4); glVertex3f(0.4, 0.2, -0.4);glVertex3f(0, 0.4, -0.4); glVertex3f(-0.4, 0.2, -0.4); glVertex3f(-0.4, -0.4, -0.4);glEnd();glColor3f(1.0, 1.0, 1.0);glBegin(GL_LINE_LOOP); glVertex3f(0.5, -0.4, 0.

33、6); glVertex3f(0.4, 0.2, 0.4);glVertex3f(0, 0.4, 0.4); glVertex3f(-0.4, 0.2, 0.4); glVertex3f(-0.3, -0.4, 0.5);glEnd();glColor3f(1.0, 1.0, 1.0);glBegin(GL_LINES); /CyanglVertex3f(0.4, -0.4, -0.4); glVertex3f(0.5, -0.4, 0.6);glVertex3f(0.4, 0.2, -0.4); glVertex3f(0.4, 0.2, 0.4);glVertex3f(0, 0.4, -0.

34、4); glVertex3f(0, 0.4, 0.4);glVertex3f(-0.4, 0.2, -0.4); glVertex3f(-0.4, 0.2, 0.4);glVertex3f(-0.4, -0.4, -0.4); glVertex3f(-0.3, -0.4, 0.5);glEnd();glFlush();2.void init()glClear(GL_COLOR_BUFFER_BIT);glMatrixMode(GL_MODELVIEW);gluLookAt(1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);glMatrixMode(GL_

35、MODELVIEW);glFrustum(-0.4, 0.5, -0.2, 0.2, -0.2, 0.6);实验五1.1.1 删除代码glEnable(GL_LIGHT0);/the earth/*glPushMatrix();glTranslatef(RAD*cos(theta), RAD*sin(theta), 0.);glRotatef(23.5, 0., 1., 0.);glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, pink);glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pink);glMateria

36、lfv(GL_FRONT_AND_BACK, GL_SPECULAR, light0_color);glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_shininess);glLineWidth(2.);glBegin(GL_LINES);glVertex3f(0., 0., .5);glVertex3f(0., 0., -.5);glEnd();glScalef(.33, .33, .33);glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, cyan);glMaterialfv(GL_FRONT_AND_

37、BACK, GL_DIFFUSE, cyan);glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, light0_color);glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_shininess);gluSphere(Q2, 1., 50, 50);glPopMatrix();*/the earth's equatorial plane/*glPushMatrix();glTranslatef(RAD*cos(theta), RAD*sin(theta), 0.);glRotatef(23.5,

38、0., 1., 0.);glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, clear);glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, clear);glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, light0_color);glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_shininess);glBegin(GL_QUADS);glVertex3f(-5.*D, -D, 0.);glVertex3f(5.*D, -D, 0

39、.);glVertex3f(5.*D, D, 0.);glVertex3f(-5.*D, D, 0.);glEnd();glPopMatrix();*/1.2关闭光照glDisable(GL_LIGHTING)；1.3去除太阳的光照处理（LIGHT1）和着色处理，观察效果1.4 基于1.1，使用以下代码，观察全局环境光的效果:glLightfv(GL_LIGHT1, GL_POSITION, light1_position );glLightfv(GL_LIGHT1, GL_AMBIENT, ambient_color );glLightModelfv(GL_LIGHT_MODEL_AMBIE

40、NT,black);glEnable(GL_LIGHT1); 1.5基于1.1，使用以下代码观察效果：glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, white );glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, black );1.6基于1.1，局部环境光设置为红色，环境光材质设为蓝色，观察效果；GLfloat ambient_color = 1.0, 0.0, 0.0, 1.0 ;/局部环境光glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT,blue);/环境光材质1.7基于

41、1.1，只打开漫反射的效果，改变光源1的位置，观察漫反射角度对光照效果的影响；GLfloat light1_position = 1.0, 5.0, 10.0, 0.0 ; glLightfv(GL_LIGHT1, GL_POSITION, light1_position);glLightfv(GL_LIGHT1, GL_SPECULAR, light1_color);glShadeModel(GL_FLAT);glLightfv(GL_LIGHT1, GL_POSITION, light1_position);glLightfv(GL_LIGHT1, GL_DIFFUSE, light1_c

42、olor);1.8基于1.1，只打开镜面反射的效果，分别进行以下设置，观察镜面反射角度对光照效果的影响（将光泽度值设置小一些）l 只改变光源1的位置GLfloat mat_shininess = 15.0 ;glLightfv(GL_LIGHT1, GL_POSITION, light1_position);glLightfv(GL_LIGHT1, GL_SPECULAR, light1_color);glEnable(GL_LIGHT1);glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, light0_color);glMaterialfv(GL_FR

43、ONT_AND_BACK, GL_SHININESS, mat_shininess);l 只改变视点的位置gluLookAt(0.0, 50.0, 3.0, 2.0, 3.0, -1.0, 0.0, 0.0, 1.0);l 同时改变光源1和视点的位置1.9基于1.1，为光源1定义聚光灯，并调整3个参数，观察光照效果（参数为GL_SPOT_DIRECTION，GL_SPOT_CUTOFF，GL_SPOT_EXPONENT，；1.10基于1.1，建立光线衰减模型，分别调整常量、一次和二次衰减参数（参数为GL_CONSTANT_ATTENUATION、GL_LINEAR_ATTENUATION、GL

44、_QUADRATIC_ATTENUATION），观察光照效果；GLfloat spot_direction = 0.0, 0.0, -1.0 ;glLightfv(GL_LIGHT1, GL_SPOT_DIRECTION, spot_direction);glLightf(GL_LIGHT1, GL_SPOT_CUTOFF, 50.0);glLightf(GL_LIGHT1, GL_SPOT_EXPONENT, 2.5);1.11基于1.1，分别使用GL_FLAT和GL_SMOOTH，观察这两种不同着色处理，并分析；GL_FLAT：GL_SMOOTH：前者是使用线性插值方式填充，后者是默认为填

45、充的颜色。实验六1. 参照texture1.c的例子，在Photoshop生成一幅2D纹理图，并映射在立方体表面；2. #include <stdlib.h>3. #include <stdio.h>4. #include <math.h>5.6. void myinit(void);7. void makeImage(void);8.9.10. /* 读取纹理 */11.12. #define TEX_WIDTH 25613. #define TEX_HEIGHT 25614. GLubyte texImageTEX_WIDTHTEX_HEIGHT3;15

46、.16. void readTexture(void)17. 18. FILE *fd;19. GLubyte ch;20. int i, j, k;21.22. fd = fopen("HongKong.256.256.raw", "rb");23. for (i = 0; i<TEX_WIDTH; i+) / for each row24. 25. for (j = 0; j<TEX_HEIGHT; j+) / for each column26. 27. for (k = 0; k<3; k+) / read RGB compon

47、ents of the pixel28. 29. fread(&ch, 1, 1, fd);30. texImageijk = (GLubyte)ch;31. 32. 33. 34. fclose(fd);35. 36.37. void myinit(void)38. 39. glClearColor(0.0, 0.0, 0.0, 0.0);40. glEnable(GL_DEPTH_TEST);41. glDepthFunc(GL_LESS);42.43. readTexture();44. glPixelStorei(GL_UNPACK_ALIGNMENT, 1);45.46. /

48、* 定义纹理 */47. glTexImage2D(GL_TEXTURE_2D, 0, 3, TEX_WIDTH,48. TEX_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, &texImage000);49.50. /* 控制滤波 */51. glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);52. glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);53. glTexParameterf(GL_TEXTURE_2D,

49、GL_TEXTURE_MAG_FILTER, GL_NEAREST);54. glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);55.56. /* 说明映射方式*/57. glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);58.59. /* 启动纹理映射 */60. glEnable(GL_TEXTURE_2D);61.62. glShadeModel(GL_FLAT);63. 64.65. void display(void)66. 67. glC

50、lear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);68.69. /* 设置纹理坐标和物体几何坐标 */70. glBegin(GL_QUADS);71. glTexCoord2f(1.0, 1.0); glVertex3f(-2.0, -1.0, 0.0);72. glTexCoord2f(1.0, 0.0); glVertex3f(-2.0, 1.0, 0.0);73. glTexCoord2f(0.0, 0.0); glVertex3f(0.0, 1.0, 0.0);74. glTexCoord2f(0.0, 1.0); glVertex3f(

51、0.0, -1.0, 0.0);75.76. glTexCoord2f(0.0, 0.0); glVertex3f(1.0, -1.0, 0.0);77. glTexCoord2f(0.0, 1.0); glVertex3f(1.0, 1.0, 0.0);78. glTexCoord2f(1.0, 1.0); glVertex3f(2.41421, 1.0, -1.41421);79. glTexCoord2f(1.0, 0.0); glVertex3f(2.41421, -1.0, -1.41421);80. glEnd();81.82. glutSwapBuffers();83. 84.8

52、5. void reshape(GLsizei w, GLsizei h)86. 87. glViewport(0, 0, w, h);88. glMatrixMode(GL_PROJECTION);89. glLoadIdentity();90. gluPerspective(60.0, 1.0*(GLfloat)w / (GLfloat)h, 1.0, 30.0);91. glMatrixMode(GL_MODELVIEW);92. glLoadIdentity();93. glTranslatef(0.0, 0.0, -3.6);94. 95.96. int main(int argc, char* argv)97. 98. / Standard GLUT initialization99. glutInit(&argc, argv);100. glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);101. glutInitWindowSize(500, 500);102. glutInitWindowPosition(70, 70);103. glutCreateWindow("A white cube with three colored l