Week8_王婉懿的上課筆記

作業一 : 打光

          步驟一 : 開啟 CodeBlocks

          步驟二 : 建立新專案

          步驟三 : 專案類型選擇GLUT Project

          步驟四 : 出現畫面上的視窗，點選 next

          步驟五 : 專案名稱打上「學號」，儲存目的為桌面，點選 Next

          步驟六 : 到FB下載 freeglut

          步驟七 : 回到CodeBlocks，找出 freeglut下載位置，點選 Next

         步驟八 : 點選 Finish

         步驟九 : 開始執行程式

 

          步驟十 : 修改部分程式碼，如下 :
             程式 :
             #include <GL/glut.h>
             static void display(void)
             {
                 const double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
                 const double a = t*90.0;
                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                 glColor3d(1,0,0);
                 glPushMatrix();//備份矩陣
                     //glTranslatef(x,y,z);//移動
                     //glRotatef(angle,x,y,z);//旋轉
                     glutSolidTeapot(0.3);
                 glPopMatrix();//還原矩陣
                 glutSwapBuffers();
             }
             const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };
             const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
             const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
             const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };
             const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };
             const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };
             const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };
             const GLfloat high_shininess[] = { 100.0f };
             /* Program entry point */
             int main(int argc, char *argv[])
             {
                 glutInit(&argc, argv);
                 glutInitWindowSize(640,480);
                 glutInitWindowPosition(10,10);
                 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
                 glutCreateWindow("GLUT Shapes");
                 //glutReshapeFunc(resize);
                 glutDisplayFunc(display);
                 //glutKeyboardFunc(key);
                 //glutIdleFunc(idle);
                 glClearColor(1,1,1,1);
                 glEnable(GL_CULL_FACE);
                 glCullFace(GL_BACK);
                 glEnable(GL_DEPTH_TEST);
                 glDepthFunc(GL_LESS);
                 glEnable(GL_LIGHT0);
                 glEnable(GL_NORMALIZE);
                 glEnable(GL_COLOR_MATERIAL);
                glEnable(GL_LIGHTING);
                 glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
                 glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
                 glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
                 glLightfv(GL_LIGHT0, GL_POSITION, light_position);
                 glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
                 glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
                 glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
                 glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
                 glutMainLoop();
                 return EXIT_SUCCESS;
             }

 

 

          步驟十 : 執行打光程式

 

• 作業二 : 旋轉打光

          步驟一 : 修改作業一的程式碼，茶壺可以旋轉。
             程式 :
             #include <GL/glut.h>
             float angle=0;//要重畫
             static void display(void)
             {
                 angle++;
                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                 glColor3d(1,0,0);
                 glPushMatrix();//備份矩陣
                     //glTranslatef(x,y,z);//移動
                     glRotatef(angle,0,1,0);//旋轉
                     glutSolidTeapot(0.3);
                 glPopMatrix();//還原矩陣
                 glutSwapBuffers();
             }
             const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };
             const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
             const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
             const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };
             const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };
             const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };
             const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };
             const GLfloat high_shininess[] = { 100.0f };
             /* Program entry point */
             int main(int argc, char *argv[])
             {
                 glutInit(&argc, argv);
                 glutInitWindowSize(640,480);
                 glutInitWindowPosition(10,10);
                 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
                 glutCreateWindow("GLUT Shapes");
                 //glutReshapeFunc(resize);
                 glutDisplayFunc(display);
                 //glutKeyboardFunc(key);
                 glutIdleFunc(display);
                 glClearColor(1,1,1,1);
                 glEnable(GL_CULL_FACE);
                 glCullFace(GL_BACK);
                 glEnable(GL_DEPTH_TEST);
                 glDepthFunc(GL_LESS);
                 glEnable(GL_LIGHT0);
                 glEnable(GL_NORMALIZE);
                 glEnable(GL_COLOR_MATERIAL);
                glEnable(GL_LIGHTING);
                 glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
                 glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
                 glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
                 glLightfv(GL_LIGHT0, GL_POSITION, light_position);
                 glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
                 glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
                 glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
                 glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
                 glutMainLoop();
                 return EXIT_SUCCESS;
             }

作業三 : 各種形狀

          步驟一 : 修改作業二的程式碼" //glutSolidTeapot(0.3);
                                                                  glutSolidCone(0.8,0.3,30,30);"，變成扁錐形。

          步驟二 : 修改數值"glutSolidCone(0.3,0.3,30,30);"，變成錐形。

          步驟三 : 修改作業二的程式碼" glutWireCone(0.3,0.8,5,30);"，變成網狀錐形。

          步驟四 : 類似步驟，做成球型。
                       修改一行"glutSolidSphere(0.7,30,30);"

 

                         修改一行"glutWireSphere(0.7,30,30);"

                           修改數值"glutWireSphere(0.7,6,30);"

                             修改數值"glutWireSphere(0.7,6,8);"

 

• 作業四 : 上下層茶壺

          步驟一 : 繼續修改程式。
             程式  :
             #include <GL/glut.h>
             float angle=0;//要重畫
             static void display(void)
             {
                 angle++;
                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                 glColor3d(1,0,0);
                 glPushMatrix();//備份矩陣
                     glTranslatef(0,0.5,0);//移動
                     glutSolidTeapot(0.3);
                 glPopMatrix();//還原矩陣
                   glPushMatrix();//備份矩陣
                     glRotatef(angle,0,1,0);//旋轉
                     glutSolidTeapot(0.3);
                     //glutWireCone(0.3,0.8,5,30);
                 glPopMatrix();//還原矩陣
                 glutSwapBuffers();
             }//下方程式碼不變