YJ week14

寫檔、讀檔

1.練習開檔、寫檔

-> 不用開專案,直接開新檔

-> 打程式碼

#include <stdio.h>

int main()

{

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

    printf("Hello World\n");

    fprintf(fout,"Hello World\n");

    fclose(fout);

}

3.開檔、寫檔 , 最後關檔

 -> 把上週的week_rect_many_TRT拿來繼續寫

-> 開新的GLUT專案,把上週的程式貼上

#include <GL/glut.h>

#include <stdio.h>

float angle[20],oldX=0;

int angleID=0;  ///0:第0個關節,1:第1個關節

FILE * fout = NULL;

void my Write()

{

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

    for(int i=0;i<20;i++){

        fprintf(fout,"%.2f",angle[i]);

    }

}

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;

}

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

{

    oldX = x ;

}

void motion(int x,int y)

{

    angle[angleID] += (x-oldX);

    myWrite();

    oldX = x;

    glutPostRedisplay();

}

#include <math.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,1);

    glRectf(0.3,0.5,-0.3,-0.2);

    glPushMatrix();

        glTranslatef(0.3,0.5,0);

        glRotatef(angle[0],0,0,1);

        glTranslatef(-0.3,-0.4,0);

        glColor3f(1,0,0);

        glRectf(0.3,0.5,0.8,0.3);

        glPushMatrix();

            glTranslatef(0.8,0.4,0);

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

            glTranslatef(-0.8,-0.4,0);

            glColor3f(0,1,0);

            glRectf(0.8,0.5,1.1,0.3);

        glPopMatrix();

    glPopMatrix();

    glPushMatrix();

        glTranslatef(-0.3,0.5,0);

        glRotatef(angle[2],0,0,1);

        glTranslatef(+0.3,-0.4,0);

        glColor3f(1,0,0);

        glRectf(-0.3,0.5,-0.8,0.3);

        glPushMatrix();

            glTranslatef(-0.8,0.4,0);

            glRotatef(angle[3],0,0,1);

            glTranslatef(+0.8,-0.4,0);

            glColor3f(0,1,0);

            glRectf(-0.8,0.5,-1.1,0.3);

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit( &argc , argv );

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("Homework14_TRT");

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutMainLoop();

}

-> file f為檔案 , 建立一個file.txt 記事本 , w+新增

-> printf 在小黑視窗印出內容

-> fprintf 在記事本上印出內容

4. r 讀檔

-> 按下r 來一行一行讀入剛剛錄下來的動作

#include <GL/glut.h>

#include <stdio.h>

float angle[20],oldX=0;

int angleID=0; ///0:第0個關節,1:第1個關節

FILE * fout = NULL , * fin=NULL;

void myWrite()

{

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

    for(int i=0;i<20;i++){

        printf( "%.2f",angle[i]);

        fprintf( fout,"%.2f",angle[i]);

    }

    printf("\n");

    fprintf(fout,"\n");

}

void myRead()

{

    if(fout != NULL) fclose(fout); ///還在讀的檔案要關掉

    if(fin==NULL) fin = fopen("file.txt","r");///打開記事本才能讀檔

    for(int i=0;i<20;i++){

        fscanf("%f",&angle[i]);

    }

    glutPostRedisplay(); ///重畫畫面

}

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;

    if(key=='r') {

        myRead();

    }

}

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

{

    oldX = x ;

}

void motion(int x,int y)

{

    angle[angleID] += (x-oldX);

    myWrite();

    oldX = x;

    glutPostRedisplay();

}

#include <math.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,1);

    glRectf(0.3,0.5,-0.3,-0.2);

    glPushMatrix();

        glTranslatef(0.3,0.5,0);

        glRotatef(angle[0],0,0,1);

        glTranslatef(-0.3,-0.4,0);

        glColor3f(1,0,0);

        glRectf(0.3,0.5,0.8,0.3);

        glPushMatrix();

            glTranslatef(0.8,0.4,0);

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

            glTranslatef(-0.8,-0.4,0);

            glColor3f(0,1,0);

            glRectf(0.8,0.5,1.1,0.3);

        glPopMatrix();

    glPopMatrix();

    glPushMatrix();

        glTranslatef(-0.3,0.5,0);

        glRotatef(angle[2],0,0,1);

        glTranslatef(+0.3,-0.4,0);

        glColor3f(1,0,0);

        glRectf(-0.3,0.5,-0.8,0.3);

        glPushMatrix();

            glTranslatef(-0.8,0.4,0);

            glRotatef(angle[3],0,0,1);

            glTranslatef(+0.8,-0.4,0);

            glColor3f(0,1,0);

            glRectf(-0.8,0.5,-1.1,0.3);

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit( &argc , argv );

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("Homework14_TRT");

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutMainLoop();

}

5. timer控制

-> 實作鬧鐘

#include <GL/glut.h>

#include <stdio.h>

void timer (int t) ///t的單位是ms

{

    ///1000代表1秒 1500代表1.5秒

    printf("鬧鐘%d,我起床了\n",t);

    printf("設定下一個鬧鐘\n");

    glutTimerFunc(2000 , timer , t+1); ///2秒後跳一次

    printf("設好鬧鐘,再回去睡\n");

}

void display()

{

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14 timer");

    glutTimerFunc(3000,timer,0);///3秒後叫timer

    glutDisplayFunc(display);

    glutMainLoop();

}

-> 加上提示音

-> 先下載提示聲的檔案do.wav , 放在freeglut-bin

#include <GL/glut.h>

#include <mmsystem.h>

#include <stdio.h>

void timer (int t) ///t的單位是ms

{

    ///1000代表1秒 1500代表1.5秒

    printf("鬧鐘%d,我起床了\n",t);

    PlaySound("do.wav",NULL,SND_ASYNC);

    printf("設定下一個鬧鐘\n");

    glutTimerFunc(2000 , timer , t+1); ///2秒後跳一次

    printf("設好鬧鐘,再回去睡\n");

}

void display()

{

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week14 timer");

    glutTimerFunc(3000,timer,0); ///3秒後叫timer

    glutDisplayFunc(display);

    glutMainLoop();

}