森 Week12 電腦圖學 檔案鍵盤滑鼠

 Week12

1.開啟codeblocks，開啟第一個檔案，新增一個資料夾，打出以下程式碼

#include <stdio.h>

int main()

{

    FILE * fout = fopen("file.txt,", "w");

    printf("Hello World\n");

    fprintf(fout, "Hello World在檔案裡\n");

}

執行結果如下

2.開第二個檔案，新增程式碼

#include <stdio.h>

int main()

{

    char line[20];

    FILE * fin = fopen("file.txt","r");

    fscanf(fin, "%s", line);

    printf("讀到了:%s\n",line);

    fscanf(fin, "%s", line);

    printf("讀到了:%s\n",line);

}

會讀取文字檔中的文字，空格算分開句子，所以要讀兩行。

執行結果如下

3.新增第三個檔案，新增程式碼

#include <stdio.h>

int main()

{

    int a[10] = {10,20,30,40,50,60,70,80,90,100};

    FILE * fout = fopen("file3.txt","w");

    for(int i=0; i<10; i++){

        fprintf(fout, "%d ", a[i]);

        printf("%d", a[i]);

    }

    fclose(fout);

    int b[10];

    FILE * fin = fopen("file3.txt", "r");

    for(int i=0; i<10; i++){

        fscanf(fin, "%d", &b[i]);

        printf("%d ", b[i] );

    }

    fclose(fin);

}

執行結果如下

4.新增一個glut專案，新增以下程式碼

#include <stdio.h>

#include <GL/glut.h>

float teapotX = 0,teapotY = 0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(teapotX, teapotY, 0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    teapotX=(x-150)/150.0;

    teapotY=(150-y)/150.0;

    display();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week12");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMainLoop();

}

茶壺會隨著滑鼠移動

執行結果如下

5.更改上一個程式碼

#include <stdio.h>

#include <GL/glut.h>

float teapotX = 0,teapotY = 0;

FILE * fout = NULL;

FILE * fin = NULL;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(teapotX, teapotY, 0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    teapotX=(x-150)/150.0;

    teapotY=(150-y)/150.0;

    if(state==GLUT_DOWN){

    if(fout==NULL) fout = fopen("file4.txt","w");

    fprintf(fout, "%f %f\n", teapotX, teapotY);

    }

    display();

}

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

{

    if(fin==NULL){

        fclose(fout);

        fin = fopen("file4.txt", "r");

    }

    fscanf(fin, "%f%f", &teapotX, &teapotY);

    display();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week12");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMainLoop();

}

執行結果如下

6.codeblocks上方設置路徑，Project>Properties>Build targets把路徑改成  .   ，然後save everything