week13

 week13

## week13-1_glm_gundan_keyboard_angleID_mouse_notion_angle

把環境設好: download opencv

小心:add PATH

小心:目錄不要改

小心:重開codeblocks

codeblocks: setting-compiler

Search directories的Compiler: C:\OpenCV2.1\include

Search directories的Linker: C:\OpenCV2.1\lib

Linker setting: cv210 cxcore210 highgui210

再把 Github 的程式下載(兩種下載法 Git指令 or Download ZIP)

再把week12-3改成week13-1

用右鍵Notepad++開 .cbp 檔，改Titlle

```cpp

float angle[20] = {};

int angleID = 0;

int oldX = 0,oldY = 0;

void motion(int x,int y) {

    angle[angleID] += y-oldY;

    oldX = x;

    oldY = y;

    glutPostRedisplay();

}

void mouse(int button,int state,int x,int y) {

    oldX = x;

    oldY = y;

}

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

    if(key=='0') angleID = 0;

    if(key=='1') angleID = 1;

    if(key=='2') angleID = 2;

    if(key=='3') angleID = 3;

}

```

glRotatef(angle[1],1,0,0);

```

glutMouseFunc(mouse);

glutMotionFunc(motion);

glutKeyboardFunc(keyboard);

```

滑鼠右鍵拖曳可以轉動、鍵盤0、1可以切換X軸和Z軸，X軸結合了上禮拜內容可以曲臂!!!

## week13-2_FILE_fopen_fprintf_fscanf

1.把week13-1複製過來用
2.要加FILE指標

```cpp

FILE * fin = NULL;

FILE * fout = NULL;

#include <stdio.h>

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[1]);

        fprintf(fout,".1f",angle[1]);

    }

    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，可以在目錄裡看到angle.txt

##week-2 最後三個物件可以轉

最後一個用github gist