實驗三觀察三維物體分析

1、實驗三觀察三維物體姓名 葉傳軍學(xué)號 E11414103 得分一. 實驗題目1. 閱讀 arraycube.c，掌握彩色立方體的建模方法，為程序加注釋。2. 修改 arraycube.c，實現(xiàn)交互式地移動照相機來觀察已經(jīng)建模好的彩色立方體。即用鼠標(biāo)或鍵盤來改變 gluLookAt(eyex, eyey, eyez, atx, aty, atz, upx, upy, upz) 函數(shù)的 9 個參數(shù)，以此來觀察立方體。要求：（1）交互時采用的鼠標(biāo)和鍵盤按鍵自定。（ 2）分別在正投影和透視投影下實現(xiàn)題目中的功能。（ 3）可增加菜單功能，將正投影和透視投影下的觀察功能融合到一個程序中。可參考交互式教程 P

2、rojection.c 的功能。3. 在 arraycube.c 的基礎(chǔ)上編寫一個交互式程序，實現(xiàn)立方體的旋轉(zhuǎn)。具體要求如下：（1）立方體的旋轉(zhuǎn)方式由鼠標(biāo)和鍵盤按鍵來控制：按下鼠標(biāo)左鍵， 立方體繞 x 軸連續(xù)旋轉(zhuǎn)；按下鼠標(biāo)左鍵 +ctrl鍵，立方體繞y 軸連續(xù)旋轉(zhuǎn)；按下鼠標(biāo)右鍵，立方體繞z 軸連續(xù)旋轉(zhuǎn)。（注意：旋轉(zhuǎn)的不動點在原點，正好是立方體的中心。）（2） 如果旋轉(zhuǎn)的不動點不在原點，而改為點P（ 1,1,1 ），如何實現(xiàn)立方體繞3 個坐標(biāo)軸軸的旋轉(zhuǎn)？（3）如果要求每按下一次鼠標(biāo)按鍵或鍵盤按鍵，立方體旋轉(zhuǎn)的角度增加5 度，應(yīng)如何修改程序？4. 自學(xué)教材 4.2.7 節(jié)。編寫一個交互式程序，使其

3、可以通過鼠標(biāo)（或鍵盤）和菜單實現(xiàn)一些 glu 和 glut 對象的旋轉(zhuǎn)，平移和比例縮放。 （加自己的創(chuàng)意）二. 設(shè)計思想本次試驗主要是用戶交互與三維物體觀察的結(jié)合，主要用到的函數(shù)有g(shù)luPerspective(fovy, aspect, near, far);glOrtho(left, right, bottom, top, near, far);gluLookAt(eyex, eyey, eyez, atx, aty, atz, upx, upy, upz);通過這些函數(shù)的調(diào)用可以分別在正投影和透視投影下從不同的角度來觀察三維物體。三. 程序清單1. #include "stdaf

4、x.h" #include <stdlib.h>#include<GL/glut.h>GLdouble vertices83= -1.0, -1.0, 1.0,?-1.0,1.0,1.0,1.0,1.0,1.0,?1.0,-1.0,1.0,-1.0,-1.0,-1.0,-1.0,1.0,-1.0, 1.0,1.0,-1.0, 1.0,-1.0,-1.0;GLdouble colors83=0.0,0.0,0.0, 1.0,0.0,0.0,1.0,1.0,0.0,0.0,1.0,0.0, 0.0,0.0,1.0,1.0,0.0,1.0, 1.0,1.0,1.0,

5、0.0,1.0,1.0;/ 定義頂點和顏色的全局?jǐn)?shù)組void polygon(inta,intb,intc ,intd)/ 根據(jù)索引列表繪制多邊形/* draw a polygon via list of vertices */glBegin(GL_QUADS);glColor3dv(colorsa);glVertex3dv(verticesa);glColor3dv(colorsb);glVertex3dv(verticesb);glColor3dv(colorsc);glVertex3dv(verticesc);glColor3dv(colorsd);glVertex3dv(vertice

6、sd);glEnd();void colorcube()/* map vertices to faces */ 利用表面繪制立方體 polygon(0,3,2,1);polygon(2,3,7,6);polygon(0,4,7,3);polygon(1,2,6,5);polygon(4,5,6,7);polygon(0,1,5,4);void display()/* display callback, clear frame buffer and z buffer,/and draw, swap buffers */ 顯示回調(diào)函數(shù)glClear(GL_COLOR_BUFFER_BIT | GL

7、_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW);glLoadIdentity();gluLookAt(1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);colorcube();glutSwapBuffers();void myReshape(intw,inth)/ 設(shè)置投影方式glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); glLoadIdentity();if (w <= h)glOrtho(-2.0, 2.0, -2.0 * (GLfloat

8、) h / (GLfloat) w, 2.0 * (GLfloat) h / (GLfloat) w, -10.0, 10.0);elseglOrtho(-2.0 * (GLfloat) w / (GLfloat) h,2.0 * (GLfloat) w / (GLfloat) h, -2.0, 2.0, -10.0, 10.0);glMatrixMode(GL_MODELVIEW);void main( intargc,char *argv)glutInit(&argc, argv);glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_

9、DEPTH);/ 設(shè)置窗口的顯示模式glutInitWindowSize(500, 500);/ 指定窗口大小glutCreateWindow("E11414103葉傳軍 " ); / 創(chuàng)建一個名為 E11414103葉傳軍的窗口glClearColor(0.0,0.0,0.0,0.0);/ 指定窗口的背景色為黑色/glShadeModel(GL_SMOOTH);glShadeModel(GL_FLAT);glutReshapeFunc(myReshape);glutDisplayFunc(display);/ 設(shè)置當(dāng)前窗口的顯示回調(diào)函數(shù)/glEnable(GL_DEPTH

10、_TEST); /* Enable hidden-surface-removal */glutMainLoop();/ 啟動主 GLUT事件處理循環(huán)2.(1)#include "stdafx.h"#include<stdlib.h>#include<GL/glut.h>GLdouble vertices83=-1.0, -1.0, 1.0,-1.0,1.0,1.0,1.0,1.0,1.0,1.0,-1.0,1.0,-1.0,-1.0,-1.0,-1.0,1.0,-1.0, 1.0,1.0,-1.0, 1.0,-1.0,-1.0;GLdouble co

11、lors83=0.0,0.0,0.0, 1.0,0.0,0.0,1.0,1.0,0.0,0.0,1.0,0.0, 0.0,0.0,1.0,1.0,0.0,1.0, 1.0,1.0,1.0,0.0,1.0,1.0;/ 定義頂點和顏色的全局?jǐn)?shù)組intx1=1,y1=1,z1=1,x2=0,y2=0,z2=0,x3=0,y3=1,z3=0;void polygon(inta,intb,intc ,intd)/ 根據(jù)索引列表繪制多邊形/* draw a polygon via list of vertices */glBegin(GL_QUADS);glColor3dv(colorsa);glVert

12、ex3dv(verticesa);glColor3dv(colorsb);glVertex3dv(verticesb);glColor3dv(colorsc);glVertex3dv(verticesc);glColor3dv(colorsd);glVertex3dv(verticesd);glEnd();void colorcube()/ 利用表面繪制立方體/* map vertices to faces */polygon(0,3,2,1);polygon(2,3,7,6);polygon(0,4,7,3);polygon(1,2,6,5);polygon(4,5,6,7);polygon

13、(0,1,5,4);void display()/ 顯示回調(diào)函數(shù)/* display callback, clear frame buffer and z buffer,/and draw, swap buffers */glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW);glLoadIdentity();gluLookAt(x1, y1, z1, x2, y2, z2, x3, y3, z3);colorcube();glutSwapBuffers();void myReshape(in

14、tw,inth)/ 設(shè)置投影方式正投影glViewport(0, 0, w, h);glMatrixMode(GL_PROJECTION);glLoadIdentity();if(w <= h)glOrtho(-2.0, 2.0, -2.0 * (GLfloat) h / (GLfloat) w,2.0 * (GLfloat) h / (GLfloat) w, -10.0, 10.0);elseglOrtho(-2.0 * (GLfloat) w / (GLfloat) h,2.0 * (GLfloat) w / (GLfloat) h, -2.0, 2.0, -10.0, 10.0);

15、glMatrixMode(GL_MODELVIEW);void keyboard(unsignedchar key,intx, inty)if (key= 'q' )x1+;glutPostRedisplay();elseif (key= 'Q' )x1-;glutPostRedisplay();elseif (key= 'w' )y1+;glutPostRedisplay();elseif (key= 'W' )y1-;glutPostRedisplay();elseif (key= 'e' )z1+;glutP

16、ostRedisplay();elseif (key= 'E' )z1-;glutPostRedisplay();elseif (key= 'a' )x2+;glutPostRedisplay();elseif (key= 'A' )x2-;glutPostRedisplay();elseif (key= 's')y2+;glutPostRedisplay();elseif (key= 'S' )y2-;glutPostRedisplay();elseif (key= 'd' )z2+;glutPo

17、stRedisplay();elseif (key= 'D' )z2-;glutPostRedisplay();elseif (key= 'z')x3+;glutPostRedisplay();elseif (key= 'Z' )z3-;glutPostRedisplay();elseif (key= 'x')y3+;glutPostRedisplay();elseif (key= 'X' )y3-;glutPostRedisplay();elseif (key= 'c')z3+;glutPostR

18、edisplay();elseif (key= 'C' )z3-;glutPostRedisplay();void main( intargc,char *argv)glutInit(&argc, argv);glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH);/ 設(shè)置窗口的顯示模式glutInitWindowSize(500, 500);/ 指定窗口大小glutCreateWindow("E11414103葉傳軍 " ); /創(chuàng)建一個名為E11414103葉傳軍的窗口glClearColor(0

19、.0,0.0,0.0,0.0);/ 指定窗口的背景色為黑色/glShadeModel(GL_SMOOTH);glShadeModel(GL_FLAT);glutReshapeFunc(myReshape);glutDisplayFunc(display);/ 設(shè)置當(dāng)前窗口的顯示回調(diào)函數(shù)glutKeyboardFunc(keyboard);/glEnable(GL_DEPTH_TEST); /* Enable hidden-surface-removal */glutMainLoop();/ 啟動主 GLUT事件處理循環(huán)(2)#include "stdafx.h"#inclu

20、de<stdlib.h>#include<GL/glut.h>GLdouble vertices83=-1.0, -1.0, 1.0,-1.0,1.0,1.0,1.0,1.0,1.0,1.0,-1.0,1.0,-1.0,-1.0,-1.0,-1.0,1.0,-1.0, 1.0,1.0,-1.0, 1.0,-1.0,-1.0;GLdouble colors83=0.0,0.0,0.0, 1.0,0.0,0.0,1.0,1.0,0.0,0.0,1.0,0.0, 0.0,0.0,1.0,1.0,0.0,1.0, 1.0,1.0,1.0,0.0,1.0,1.0;/ 定義頂點和顏

21、色的全局?jǐn)?shù)組intx1=1,y1=1,z1=1,x2=0,y2=0,z2=0,x3=0,y3=1,z3=0;void polygon(inta,intb,intc ,intd)/ 根據(jù)索引列表繪制多邊形/* draw a polygon via list of vertices */glBegin(GL_QUADS);glColor3dv(colorsa);glVertex3dv(verticesa);glColor3dv(colorsb);glVertex3dv(verticesb);glColor3dv(colorsc);glVertex3dv(verticesc);glColor3dv(

22、colorsd);glVertex3dv(verticesd);glEnd();void colorcube()/ 利用表面繪制立方體/* map vertices to faces */polygon(0,3,2,1);polygon(2,3,7,6);polygon(0,4,7,3);polygon(1,2,6,5);polygon(4,5,6,7);polygon(0,1,5,4);void display()/ 顯示回調(diào)函數(shù)/* display callback, clear frame buffer and z buffer,/and draw, swap buffers */glC

23、lear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW);glLoadIdentity();gluLookAt(x1, y1, z1, x2, y2, z2, x3, y3, z3);colorcube();glutSwapBuffers();void myReshape(intw,inth)/ 設(shè)置投影方式透視投影glViewport(0, 0, w, h);glMatrixMode(GL_PROJECTION);glLoadIdentity();if(w <= h)glFrustum(-2.

24、0, 2.0, -2.0 * (GLfloat) h / (GLfloat) w,2.0 * (GLfloat) h / (GLfloat) w, -10.0, 10.0);elseglFrustum(-2.0 * (GLfloat) w / (GLfloat) h,2.0 * (GLfloat) w / (GLfloat) h, -2.0, 2.0, -10.0, 10.0);glMatrixMode(GL_MODELVIEW);void keyboard(unsignedchar key,intx, inty)if (key= 'q' )x1+;glutPostRedisp

25、lay();elseif (key= 'Q' )x1-;glutPostRedisplay();elseif (key= 'w' )y1+;glutPostRedisplay();elseif (key= 'W' )y1-;glutPostRedisplay();elseif (key= 'e' )z1+;glutPostRedisplay();elseif (key= 'E' )z1-;glutPostRedisplay();elseif (key= 'a' )x2+;glutPostRedisplay();elseif (key= 'A' )x2-;glutPostRedisplay();elseif (key= 's')y2+;glutPostRedisplay();elseif (key= 'S' )y2-;glutPostRedisplay();elseif (key= 'd' )z2+;glutPostRedisplay();elseif (key= 'D' )