寫檔五行
#include <stdio.h>
FILE *fout=NULL,*fin=NULL;
int main(int argc,char **argv)//同等*argv[]
{
if(fout==NULL)
fout=fopen("output.txt","w+");
fprintf(fout,"Hollow World!!\n");
return 0;
}

作業二
用glut把 mouse motion 存起來
#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+");///這裡把滑鼠的座標寫入output.txt資料裡面
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();
}
#include <stdio.h>
FILE *fout=NULL,*fin=NULL;
int nowx=0,nowy=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef((nowx-150)/150.0,-(nowy-150)/150.0, 0);////這邊把滑鼠的座標轉換成+1,-1
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x,int y)
{
if(fout==NULL) fout=fopen("output.txt","w+");//滑鼠的移動位置紀錄,w=write
fprintf(fout,"%d %d\n",x,y);
printf("%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");///把剛才只有滑鼠移動的位置,讀入r=read
fscanf(fin,"%d %d\n",&nowx,&nowy);///並scanf這兩個座標,讓之後茶壺跟著這些作標的位置移動
printf("%d %d\n",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();
}
機器人動一動
#include <stdio.h>
#include <GL/glut.h>
FILE *fout=NULL, *fin=NULL;
float rot[10]={0};
int rotID=1, oldX=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glutWireCube(0.3);
glPushMatrix();
glTranslatef(0,0.2,0);
glutWireCube(0.1);
glPopMatrix();
glPushMatrix();
glTranslatef(0.15,0.1,0);
glRotatef(rot[1],0,0,1);
glTranslatef(0.05,0,0);
glutWireCube(0.1);
glTranslatef(0.05,0,0);
glRotatef(rot[2],0,0,1);
glTranslatef(0.05,0,0);
glutWireCube(0.1);
glTranslatef(0.05,0,0);
glRotatef(rot[3],0,0,1);
glTranslatef(0.05,0,0);
glutWireCube(0.1);
glPopMatrix();
glPushMatrix();
glTranslatef(-0.15,0.1,0);
glRotatef(-rot[4],0,0,1);
glTranslatef(-0.05,0,0);
glutWireCube(0.1);
glTranslatef(-0.05,0,0);
glRotatef(-rot[5],0,0,1);
glTranslatef(-0.05,0,0);
glutWireCube(0.1);
glTranslatef(-0.05,0,0);
glRotatef(-rot[6],0,0,1);
glTranslatef(-0.05,0,0);
glutWireCube(0.1);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
void mouse(int button, int state, int x, int y)
{
if(state==GLUT_DOWN){
oldX=x;
}
}void motion(int x, int y)
{
rot[rotID] += (x-oldX);
oldX=x;
glutPostRedisplay();
if(fout==NULL) fout=fopen("motion.txt","w+");
for(int i=0;i<10;i++){
fprintf( fout, "%.1f ", rot[i]);;
printf( "%.1f ", rot[i]);;
}
fprintf(fout, "\n");
printf("\n");
}
void keyboard(unsigned char key, int x, int y)
{
if(key=='1') rotID=1;
if(key=='2') rotID=2;
if(key=='3') rotID=3;
if(key=='4') rotID=4;
if(key=='5') rotID=5;
if(key=='6') rotID=6;
if(key=='r'){
if(fin==NULL) fin=fopen("motion.txt","r");
for(int i=0;i<10;i++){
fscanf( fin, "%f ", &rot[i]);;
printf( "%f ", rot[i]);;
}
fprintf(fin, "\n");
printf("\n");
}
glutPostRedisplay();///請電腦貼個公告,有空就重新display
}
int main(int argc,char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("Robot");
glutDisplayFunc(display);
glutMotionFunc(motion);
glutMouseFunc(mouse);
glutKeyboardFunc(keyboard);
glutMainLoop();
}






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