Bai's-電腦圖學-Week13

 #week13

先設定好環境
1.freeglut
2.安裝openCV2.1 add PATH, C:\OpenCV2.1目錄
3.重開CB,Setting-Compiler,3個設定

-Search directiories的 Compiler 對應
C:\OpenCV2.1\include
-Search directiories的 Linker 對應
C:\OpenCV2.1\lib
-Linker setting 要加1. cv210 2.cxcore 3.highgui210

#week13-1_glum_gundam_keyboard_angleID_mouse_motion_angle

沿用上週12-3

0.改目錄名,改.cbp名,改.cbp的內容title

1.把float angle =0 改成

```cpp

float angle[20] = {};

int angleID = 0; //0,1,2,3... angle[angleID]

 

#week13-2_FILE_fopen_fprintf_fsanf

0.改目錄名,改.cbp名,改.cbp的內容title

1.加FILE指標

```cpp

FILE * fin =NULL;

FILE * fout = NULL;

```

3.在motion()裡,要加一段程式

```cpp

void motion(int x, int y){ 

    angle[angleID] += y - oldY;  

    oldX = x;

    oldY = y;

    glutPostRedisplay();

    if(fout==NULL) fout = fopen("angle.txt", "w+");

    for(int i=0;i<20;i++){

        printf("%.1f" , angle[i]);

        fprintf(fout, "%.1f. angle[i] );

}

printf("\n");

fprintf(fout,"\n");

```執行程式時,用mouse motion 一邊改變角度,一邊大量產生角度值

小黑關掉後,可在目錄看,看到 angle.txt內 就是剛印的數值

現在要讀

```cpp

void keyboard(unsigned char key, int x ,int y){

        if(key=='r'){

                if(fin==NULL) fopen("angle.txt.", "r");

                for(int i=0; i<20; i++){

                        fscanf(fin, "%f" , & angle[i] );

}

glutPostRedisplay();