step01
file-new-empty week14-1.cpp
1.寫檔(write)
```c
#include <stdio.h>
int main()
{
FILE*fout=fopen("file.txt","w+");///指標fout開啟檔案
printf("Hello World\n");
fprintf(fout,"Hello World\n");
fclose(fout);///關閉檔案
}
```
file-new-empty week14-2.cpp
2.讀檔(read)
```c
#include <stdio.h>
int main()
{
FILE*fout=fopen("file.txt","w+");///指標fout開啟檔案
fprintf(fout,"3.1415926\n");
fclose(fout);///關閉檔案
float angle=0;
FILE*fin=fopen("file.txt","r");
fscanf(fin,"%f",&angle);
printf("讀到了角度:%f",angle);
fclose(fin);
}
```
用week13_rect_many_TRT改
3.
```c++
#include <GL/glut.h>
#include <stdio.h>
float angle[20],oldX=0;
int angleID=0;
FILE*fout=NULL;
void myWrite()
{
if(fout==NULL) fout=fopen("file.txt","w+");
for(int i=0;i<20;i++)
{
printf("%.1f",angle[i]);///小黑印出來
fprintf(fout,"%.1f",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();///請glut重畫畫面
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1);///白色
glRectf(0.3,0.5,-0.3,-0.5);///四邊形
glPushMatrix();///右半部
glTranslatef(0.3,0.4,0);///把手臂掛回身體
glRotatef(angle[0],0,0,1);///旋轉,對z軸轉
glTranslatef(-0.3,-0.4,0);///把手臂旋轉中心放在正中心
glColor3f(1,0,0);///紅色
glRectf(0.3,0.5,0.7,0.3);///上手臂
glPushMatrix();
glTranslatef(0.7,0.4,0);///把手臂掛回身體
glRotatef(angle[1],0,0,1);///旋轉,對z軸轉
glTranslatef(-0.7,-0.4,0);///把手臂旋轉中心放在正中心
glColor3f(0,1,0);///綠色
glRectf(0.7,0.5,1.0,0.3);///下手肘
glPopMatrix();
glPopMatrix();
glPushMatrix();///左半部
glTranslatef(-0.3,0.4,0);///把手臂掛回身體
glRotatef(angle[2],0,0,1);///旋轉,對z軸轉
glTranslatef(0.3,-0.4,0);///把手臂旋轉中心放在正中心
glColor3f(1,0,0);///紅色
glRectf(-0.3,0.5,-0.7,0.3);///上手臂
glPushMatrix();
glTranslatef(-0.7,0.4,0);///把手臂掛回身體
glRotatef(angle[3],0,0,1);///旋轉,對z軸轉
glTranslatef(0.7,-0.4,0);///把手臂旋轉中心放在正中心
glColor3f(0,1,0);///綠色
glRectf(-0.7,0.5,-1.0,0.3);///下手肘
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutInitWindowSize(600,600);
glutCreateWindow("week13 rect TRT TRT");
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
}
```
step02file-new-project week14_angle_fprintf_fscanf
1.複製動作(壓住r鍵)
```c++
#include <GL/glut.h>
#include <stdio.h>
float angle[20],oldX=0;
int angleID=0;
FILE*fout=NULL,*fin=NULL;
void myWrite()
{
if(fout==NULL) fout=fopen("file.txt","w+");
for(int i=0;i<20;i++)
{
printf("%.1f ",angle[i]);///小黑印出來
fprintf(fout,"%.1f ",angle[i]);
}
printf("\n");
fprintf(fout,"\n");
}
void myRead()
{
if(fout!=NULL)
{
fclose(fout); fout=NULL;
}
if(fin==NULL) fin=fopen("file.txt","r");
for(int i=0;i<20;i++)
{
fscanf(fin,"%f",&angle[i]);
}
glutPostRedisplay();///重畫畫面
}
void keyboard(unsigned char key,int x,int y)
{
if(key=='r') myRead();
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();///請glut重畫畫面
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1);///白色
glRectf(0.3,0.5,-0.3,-0.5);///四邊形
glPushMatrix();///右半部
glTranslatef(0.3,0.4,0);///把手臂掛回身體
glRotatef(angle[0],0,0,1);///旋轉,對z軸轉
glTranslatef(-0.3,-0.4,0);///把手臂旋轉中心放在正中心
glColor3f(1,0,0);///紅色
glRectf(0.3,0.5,0.7,0.3);///上手臂
glPushMatrix();
glTranslatef(0.7,0.4,0);///把手臂掛回身體
glRotatef(angle[1],0,0,1);///旋轉,對z軸轉
glTranslatef(-0.7,-0.4,0);///把手臂旋轉中心放在正中心
glColor3f(0,1,0);///綠色
glRectf(0.7,0.5,1.0,0.3);///下手肘
glPopMatrix();
glPopMatrix();
glPushMatrix();///左半部
glTranslatef(-0.3,0.4,0);///把手臂掛回身體
glRotatef(angle[2],0,0,1);///旋轉,對z軸轉
glTranslatef(0.3,-0.4,0);///把手臂旋轉中心放在正中心
glColor3f(1,0,0);///紅色
glRectf(-0.3,0.5,-0.7,0.3);///上手臂
glPushMatrix();
glTranslatef(-0.7,0.4,0);///把手臂掛回身體
glRotatef(angle[3],0,0,1);///旋轉,對z軸轉
glTranslatef(0.7,-0.4,0);///把手臂旋轉中心放在正中心
glColor3f(0,1,0);///綠色
glRectf(-0.7,0.5,-1.0,0.3);///下手肘
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutInitWindowSize(600,600);
glutCreateWindow("week14 angle fprintf fscanf");
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
}
```
2.
notepad++的.cbp檔之中的 working_dir="......."改成working_dir="."並存檔
codeblocks reload
freeglut.dll 從freeglut/bin複製至專案
step03
1.glutTimeFunc()計時器
```c++
#include <GL/glut.h>
#include <stdio.h>
void timer(int t)
{
printf("起床,現在時間: %d\n",t);
}
void display()
{
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week14 timer");
glutTimerFunc(1000,timer,1);
glutTimerFunc(2000,timer,2);
glutTimerFunc(3000,timer,3);
glutTimerFunc(4000,timer,4);
glutTimerFunc(5000,timer,5);
glutDisplayFunc(display);
glutMainLoop();
}
```
2.自動計時
```c++
#include <GL/glut.h>
#include <stdio.h>
void timer(int t)
{
printf("起床,現在時間: %d\n",t);
glutTimerFunc(1000,timer,t+1);
}
void display()
{
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week14 timer");
glutTimerFunc(5000,timer,0);///設定5秒後,從0開始計時
glutDisplayFunc(display);
glutMainLoop();
}
```
3.播放聲音PlaySound()
#include <mmsystem.h>
PlaySound("do.wav",NULL,SND_ASYNC);
```c++
#include <GL/glut.h>
#include <stdio.h>
#include <mmsystem.h>
void timer(int t)
{
printf("我起床囉! %d\n",t);
PlaySound("do.wav",NULL,SND_ASYNC);
glutTimerFunc(2000,timer,t+1);
}
void display()
{
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week14 timer");
glutTimerFunc(5000,timer,0);///設定5秒後,從0開始計時
glutDisplayFunc(display);
glutMainLoop();
}
```
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