week14

作業1:
開貝殼專案
輸入程式讀檔案
程式:
#include <stdio.h>
FILE*fout=NULL,*fin=NULL;
int main(int argc,char **argv)
{
    if(fout==NULL)
        fout=fopen("output.txt","w+");///w寫檔案,R是讀檔案
    fprintf(fout,"HelloWorld");
}

作業2:

#include <GL/glut.h>

#include <stdio.h>

FILE*fout=NULL,*fin=NULL;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

void motion(int x, int y)

{

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

    fprintf(fout,"%d %d\n",x,y);

}

    int main(int argc,char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}

作業3

讀檔案

開起執行檔 使用滑鼠移動

重新開起執行檔 按 r 茶壺會依照剛剛畫的軌跡移動

#include <GL/glut.h>

#include <stdio.h>

FILE *fout=NULL,*fin=NULL;

int nowX=150, nowY=150;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef((nowX-150)/150.0 ,-(nowY-150)/150.0,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void motion (int x,int y)

{

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

    fprintf(fout,"%d %d\n",x,y);

}

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

{

    if(key=='r')

    {

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

        fscanf(fin,"%d %d",&nowX,&nowY);

    }

    glutPostRedisplay();

}

int main(int argc,char **argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}