Week4_王婉懿的上課筆記

• 作業一 : 用程式做出一個圓



         步驟一 : 先打開第一周做過的作業_茶壺。在FB社團的檔案下載。 (freeglut網路上可以免費下載)

 

 

           步驟二 : 打開freeglut拖曳檔案到桌面，千萬不要直接解壓縮 !



 

 

           步驟三 : 開啟 CodeBlocks，建立新專案。



 

 

          步驟四 : 專案類型選擇GLUT Project。



 

 

          步驟五 : 出現畫面上的視窗，點選 next。



 

    

       步驟六 : 專案名稱打上「學號」，儲存目的選擇桌面，點選 Next 。



 

  

         步驟七 : 找出 freeglut下載位置，點選 Next。

 



 

    

       步驟八 : 點選 Finish。



 

 

          步驟九 :將程式輸入到和圖中一樣。

 

                    程式 :

                       #include <GL/glut.h>

                       #include <math.h>
                       void display()
                       {
                            glBegin(GL_POLYGON);
                            for(float angle=0; angle <= 3.1415926 *2; angle += 0.01){
                                glVertex2f(cos(angle),sin(angle));
                            }
                            glEnd();
                            glutSwapBuffers();
                        }

 

                       int main(int argc, char *argv[])

                        {
                             glutInit(&argc, argv);
                             glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
                             glutCreateWindow("04160011 Number 1");
                             glutDisplayFunc(display);

                             glutMainLoop();

                        }

 

 

 



 

• 作業二 : 用程式改圓的顏色



         步驟一 : 先打開剛做過的作業_圓。

 

         步驟二 : 改其中五行程式碼。

                 程式 :

                     #include <GL/glut.h>
                    #include <math.h>
                    #include <stdio.h>
                    void display()
                    {
                        glBegin(GL_POLYGON);
                        for(float angle=0; angle <= 3.1415926 *2; angle += 0.01){
                            glVertex2f(cos(angle),sin(angle));
                        }
                        glEnd();
                        glutSwapBuffers();
                    }
                    void mouse(int button,int state,int x,int y){
                        printf("%d %d %d %d\n",button,state,x,y);
                        glColor3f(1,x/300.0,y/300.0);
                    }
                    int main(int argc, char *argv[])
                    {                   
                        glutInit(&argc, argv);
                        glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
                        glutCreateWindow("04160011 Number 1");
                        glutDisplayFunc(display);
                        glutMouseFunc(mouse);
                        glutMainLoop();

                      }

 

 

         步驟三 :  點圓不同地方會改成不同顏色。

 

 

 

 

 

• 作業三 :

         步驟一 :  接續上個步驟，改程式碼。

 

                    程式 :

                       #include <GL/glut.h>
                       #include <math.h>
                       #include <stdio.h>
                       void display()
                       {
                           glBegin(GL_POLYGON);
                           for(float angle=0; angle <= 3.1415926 *2; angle += 0.01){
                               glVertex2f(cos(angle),sin(angle));
                           }
                           glEnd();
                           glutSwapBuffers();
                       }
                       void mouse(int button,int state,int x,int y){
                           //printf("%d %d %d %d\n",button,state,x,y);
                       }
                       void motion(int x,int y){
                           glColor3f(1,x/300.0,y/300.0);
                           glutPostOverlayRedisplay();
                       }
                       int main(int argc, char *argv[])
                       {
                           glutInit(&argc, argv);
                           glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
                           glutCreateWindow("04160011 Number 1");
                           glutDisplayFunc(display);
                           glutMouseFunc(mouse);
                           glutMotionFunc(motion);
                           glutMainLoop();

                       }

 

 

         步驟二 : 按著圓移動滑鼠，可以變色。

 

• 作業四 : 將圓改成可以張嘴的小精靈

          步驟一 :  接續上個步驟，改程式碼。
                    程式 :
                   #include <GL/glut.h>
                   #include <math.h>
                   #include <stdio.h>
                   float mouth=0;
                   void display()
                   {
                       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                       glBegin(GL_TRIANGLE_FAN);
                       glVertex2f(0, 0);
                       for(float angle=0 + mouth; angle <= 3.1415926 *2 - mouth; angle +=3.1415926 / 100){
                       glVertex2f(cos(angle),sin(angle));
                    }
                       glEnd();
                       glutSwapBuffers();
                   }
                   void mouse(int button,int state,int x,int y){
                       //printf("%d %d %d %d\n",button,state,x,y);
                   }
                   void motion(int x,int y){
                       mouth = x/ 300.0;
                       glColor3f(1,x/300.0,y/300.0);
                       glutPostRedisplay();
                   }
                   int main(int argc, char *argv[])
                   {
                       glutInit(&argc, argv);
                       glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
                       glutCreateWindow("04160011 Number 1");
                       glutDisplayFunc(display);
                       glutMouseFunc(mouse);
                       glutMotionFunc(motion);
                       glutMainLoop();
                   }

 

 

          步驟二 : 按著滑鼠左鍵拖曳，可改變小精靈嘴巴大小與顏色。