STEP1 : 開啟codeblocks新增一個專案 ⟶ File ⟶ NEW ⟶ Empty file ⟶ 命名專案為file.cpp

Step2 : 實作讀檔
程式碼 : #include<stdio.h>
int main()
{
FILE * fout=fopen("檔名2.txt","w+");///檔案指標fout是開啟檔(....write+)
for(int i=0; i<20; i++){
printf("Hello %d\n", i);
fprintf( fout,"Hello %d\n", i);
}
}
執行後如下圖 :
Step3 : 改程式碼
int angle[10];///要有很多關節
int main()
{
FILE * fout=fopen("motion.txt", "w+");
for(int i=0; i<10; i++){
printf( "%d", angle[i]);
fprintf( fout,"%d", angle[i]);
}///數字黏在一起不對
printf("\n");///印一行後,跳行
fprintf(fout, "\n");
}
執行後如下圖 :

Step4 :新增命名為Week14_file的GLUT專案
程式碼 :
#include <GL/glut.h>
int angle[10]={0,0,0,0,0, 0,0,0,0,0};
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1);
glutSolidTeapot(0.2);
glPushMatrix();
glTranslatef(0.2, 0,0 );
glRotatef(angle[0], 0,0,1);
glTranslatef(0.2, 0,0 );
glColor3f(1,0,0);
glutSolidTeapot(0.2);
glPushMatrix();
glTranslatef(0.2, 0,0);
glRotatef(angle[1], 0,0,1);
glTranslatef(0.2, 0,0);
glColor3f(1,1,0);
glutSolidTeapot(0.2);
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.2, 0,0 );
glRotatef(angle[2], 0,0,1);
glTranslatef(-0.2, 0,0 );
glColor3f(0,1,0);
glutSolidTeapot(0.2);
glPushMatrix();
glTranslatef(-0.2, 0,0);
glRotatef(angle[3], 0,0,1);
glTranslatef(-0.2, 0,0);
glColor3f(0,0,1);
glutSolidTeapot(0.2);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Week14 file");
glutDisplayFunc(display);
glutMainLoop();
}
執行後如下圖 :

Step5 : 動作
#include <GL/glut.h>
int angle[10]={0,0,0,0,0, 0,0,0,0,0};
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1);
glutSolidTeapot(0.2);
glPushMatrix();
glTranslatef(0.2, 0,0 );
glRotatef(angle[0], 0,0,1);
glTranslatef(0.2, 0,0 );
glColor3f(1,0,0);
glutSolidTeapot(0.2);
glPushMatrix();
glTranslatef(0.2, 0,0);
glRotatef(angle[1], 0,0,1);
glTranslatef(0.2, 0,0);
glColor3f(1,1,0);
glutSolidTeapot(0.2);
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.2, 0,0 );
glRotatef(angle[2], 0,0,1);
glTranslatef(-0.2, 0,0 );
glColor3f(0,1,0);
glutSolidTeapot(0.2);
glPushMatrix();
glTranslatef(-0.2, 0,0);
glRotatef(angle[3], 0,0,1);
glTranslatef(-0.2, 0,0);
glColor3f(0,0,1);
glutSolidTeapot(0.2);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int angleID=0;
int oldX, oldY;
void mouse(int button, int state, int x, int y)
{
oldX=x; oldY=y;
}
#include <stdio.h>
FILE * fout=NULL;
void saveAll()
{
if(fout==NULL) fout=fopen("motion.txt", "w+");
for(int i=0; i<10; i++){
printf( "%d ", angle[i]);
fprintf( fout,"%d ", angle[i]);
}///數字黏在一起不對
printf("\n");///印一行後,跳行
fprintf(fout, "\n");
}
void motion(int x, int y)
{
angle[angleID] += (x-oldX);
oldX=x;
saveAll();
glutPostRedisplay();
}
FILE * fin=NULL;
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;
if(key=='r') {
if(fin==NULL) fin=fopen("motion.txt", "r");
for(int i=0; i<10; i++){
fscanf(fin, "%d", &angle[i]);
}
glutPostRedisplay();
}
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Week14 file");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutKeyboardFunc(keyboard);
glutMainLoop();
}
執行後如下圖 :


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