week14 鄭玉妮

課堂作業一

開新檔案

#include <stdio.h>

FILE *fout=NULL,*fin=NULL;

int main(int argc,char**argv)

{

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

    fprintf(fout,"Hello World\n");

}

課堂作業二

移動滑鼠可以讀取座標

#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("motion.txt","w+");

    fprintf(fout,"%d %d\n", x, y);

    printf("%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();

}

課堂作業三

按r移動茶壺可以讀到座標x,y

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

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

///圖片原大小約為300*300

///-150在除以150

///就會大約在-1到1之間

///y 軸計算完之後會相反方向差個負號

///所以y軸必須加個負號將此導正

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    if(key=='r')

    {

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

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

     printf("%d %d\n", nowX, nowY);

    }

    glutPostRedisplay();

///請電腦重新公告，有空就重新display

}