今天認真不西斯

課堂作業1

#include <stdio.h>

FILE *fout=NULL ,*fin=NULL;

int main(int argc,char**argv)

{

    if(fout==NULL) fout=fopen("output.txt","w+");//w就是寫入檔案r就是讀檔案

        fprintf(fout,"Hello World");

}

課堂作業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);//印出個茶壺

    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();

    }

]

念個咒語

設定Build option

編譯過後可得到一個茶壺

而且滑鼠如果移動到茶壺黑視窗裡,output.txt就會紀錄滑鼠的移動坐標

課堂作業3

#include <GL/glut.h>

#include <stdio.h>

FILE *fout=NULL ,*fin=NULL;//讀檔指標

int nowX=150,nowY=150;//等一下讀檔案,把mouse motion 讀回來

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

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

//視窗是300X300 ,所以一半是150 減掉150,就變再-150....+150

//再除以150.0就會變成介於-1....+1之間的float 數

    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')//按小寫的r會去讀1行/一組xy值

    {

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

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

    }

    glutPostRedisplay();//電腦貼個Post -It 便利貼, 告訴GLUT 有空要重畫畫面

}

int main(int argc,char**argv)

{

    glutInit(&argc ,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

    }

按編譯後,你按鍵盤按鍵"r"你的茶壺就會猛然挪動

課堂作業4

#include <GL/glut.h>

#include <stdio.h>

float rot[10]={0};

int rotNow=0, oldX=0, oldY=0;;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

    glPushMatrix();

        glutWireCube(0.3);///body

        glPushMatrix();

             glTranslatef(0,0.2,0);

             glutWireCube(0.1);///head

        glPopMatrix();

        glPushMatrix();

            glTranslatef(0.15,0.1,0);

            glRotatef(rot[0],0,0,1);

            glTranslatef(0.05,0,0);

            glutWireCube(0.1);///upper arm

            glTranslatef(0.05,0,0);

            glRotatef(rot[1],0,0,1);

            glTranslatef(0.05,0,0);

            glutWireCube(0.1);///lower arm

            glTranslatef(0.05,0,0);

            glRotatef(rot[2],0,0,1);

            glTranslatef(0.05,0,0);

            glutWireCube(0.1);///right arm

        glPopMatrix();

        glPushMatrix();

            ///glTranslatef(-0.2,0.1,0);

            glTranslatef(-0.15,0.1,0);

            glRotatef(-rot[4],0,0,1);

            glTranslatef(-0.05,0,0);

            glutWireCube(0.1);///upper arm

            glTranslatef(-0.05,0,0);

            glRotatef(-rot[5],0,0,1);

            glTranslatef(-0.05,0,0);

            glutWireCube(0.1);///lower arm

            glTranslatef(-0.05,0,0);

            glRotatef(-rot[6],0,0,1);

            glTranslatef(-0.05,0,0);

            glutWireCube(0.1);///right hand

        glPopMatrix();

    glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

FILE *fout=0, *fin=0;

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

{

    if(key=='0') rotNow=0;

    if(key=='1') rotNow=1;

    if(key=='2') rotNow=2;

    if(key=='3') rotNow=3;

    if(key=='4') rotNow=4;

    if(key=='5') rotNow=5;

    if(key=='6') rotNow=6;

    if(key=='r'){///按小寫的r 會去讀1行/一組x,y

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

        for(int i=0;i<7;i++){

            fscanf(fin, "%f", &rot[i]);

        }

    }

    glutPostRedisplay();///電腦貼個Post-It便利貼,告訴GLUT有空要重畫畫面哦

}

void motion(int x, int y)

{

    rot[rotNow] += x-oldX;

    oldX = x;

    glutPostRedisplay();

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

    for(int i=0;i<7;i++){

        fprintf(fout, "%3.1f ", rot[i]);

        printf("%3.1f ", rot[i]);

    }

    fprintf(fout, "\n");

    printf("\n");

}

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

{///先開冰箱門(滑鼠按下去),把大象塞進去(滑鼠drag),最後再關上冰箱門(起來)

    if(state==GLUT_DOWN){

        oldX=x; oldY=y;

    }

}

int main(int argc,char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Robot");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMainLoop();

}

/*

#include <GL/glut.h>

#include <stdio.h>

FILE *fout=NULL, *fin=NULL;///檔案的指標

int nowX=150, nowY=150;///等一下讀檔案,把mouse motion讀回來

void display()

{

    glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);

    glPushMatrix();///保護起來

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

    ///視窗是300x300,所以一半是150, 減掉150,就變在-150..+150

    /// 再除以150.0 就會變成介於 -1 ... +1 之間的float數

        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'){///按小寫的r 會去讀1行/一組x,y

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

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

    }

    glutPostRedisplay();///電腦貼個Post-It便利貼,告訴GLUT有空要重畫畫面哦

}

int main(int argc, char**argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("3D");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}

*/

理解老師的程式碼