圖形學試驗報告四

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《計算機圖形學》試驗報告

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一、試驗目的1，使用opengl函數(shù)完成一個圖形動畫程序，顯示太陽、地球、月亮之間的運行關系。2，采用opengl材質、光照技術完成一個在小盒內的運動小球，要求小球作為移動光源，觀測運行效果。二、試驗要求1.把握Window圖形編程的基本方法；2.把握如何進行簡單動畫制作3.把握如何采用opengl材質、光照技術三、試驗設備（環(huán)境）Windows系統(tǒng),vs2023四、試驗步驟與結果1.使用opengl函數(shù)完成一個圖形動畫程序，顯示太陽、地球、月亮之間的運行關系。使用的一些函數(shù)：glShadeModel(GL_FLAT);GL_FLAT則只是以指定的某一點的單一色繪制其他所有點glPushMatrix();//進棧gluLookAt(0.0,0.0,5,0.0,0.0,0.0,0.0,1.0,0.0);//觀測角度glRotatef((GLfloat)year,0.0,1.0,0.0);//旋轉，(GLfloat)year角度設置，0.0,1.0,0.0坐標設置glTranslatef(2.0,0.0,0.0);//平移，后面代表坐標，沿著x正方向平移glPopMatrix();//出棧glutSwapBuffers();//實現(xiàn)雙緩沖glViewport(0,0,(GLsizei)w,(GLsizei)h);//矩形大小的調整運行截圖：完整代碼：#include\#include#defineGLUT_DISABLE_ATEXIT_HACK#includestaticfloatyear=0,day=0;voidinit(void){glClearColor(0.0,0.0,0.0,0.0);glShadeModel(GL_FLAT);//設定著色模式，使用圖元中某個頂點的顏色來渲染整個圖元。}voiddisplay(void){glClear(GL_COLOR_BUFFER_BIT);glColor3f(0.0,1.0,0.0);glLoadIdentity();glPushMatrix();gluLookAt(0.0,0.0,5,0.0,0.0,0.0,0.0,1.0,0.0);//繪制太陽glRotatef((GLfloat)year,0.0,1.0,0.0);glutWireSphere(0.8,25,25);//繪制地球glRotatef((GLfloat)year,0.0,1.0,0.0);glTranslatef(2.0,0.0,0.0);glRotatef((GLfloat)day,0.0,1.0,0.0);glutWireSphere(0.2,20,20);//繪制月球glRotatef((GLfloat)year,0.0,1.0,0.0);glTranslatef(0.4,0.0,0.0);glRotatef((GLfloat)day,0.0,1.0,0.0);glutWireSphere(0.1,15,15);//glutWireCube(2.0);glPopMatrix();glutSwapBuffers();}voidspinDisplay(void){year=year+0.03;if(year>360.0){year=year-360.0;}}day=day+0.06;if(day>360.0){day=day-360.0;}glutPostRedisplay();voidreshape(intw,inth){glViewport(0,0,(GLsizei)w,(GLsizei)h);//函數(shù)作用：用一個視景體截取圖像//glFrustum(-1.0,1.0,-1.0,1.0,-1.0,1.0);glMatrixMode(GL_PROJECTION);//mode指定哪一個矩陣堆棧是下一個矩陣操作的目標,參數(shù)表示接下來要進行投影相關的操作glLoadIdentity();//設置當前變化矩陣為單位矩陣；單位矩陣就是對角線上都是1，其余元素皆為0的矩陣。然后復位//glOrtho(-3.0,3.0,-3.0,3.0,-3.0,3.0);glFrustum(-1.0,1.0,-1.0,1.0,1.5,20);