首先開啟 CodeBlocks 打開一個貝殼專案,如下圖操作


接著輸入以下程式碼,來寫檔
#include <stdio.h>
FILE *fout=NULL, *fin=NULL;
int main(int argc, char**argv)
{
if(fout==NULL) fout=fopen("output.txt","w+");
///printf("Hello world\n");
fprintf( fout,"Hello world\n");
return 0;
}

執行後,會發現專案資料夾中,有新增文字檔

文字檔中有 Hello world 的文字

【課堂作業 二】
接著如下圖操作







將下圖示複製道專案資料夾

接著輸入以下程式碼
#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+");
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();
}
按下執行,並在茶壺框框中用滑鼠任意點,如下圖
關閉執行檔後,可在新建的文字檔中,看見儲存的檔案
【課堂作業 三】
新增以下程式碼
#include <GL/glut.h>
#include <stdio.h>
FILE *fout=NULL, *fin=NULL;
int nowX=0, nowY=0; /// ,oldX=0,oldY=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef((nowX-150)/150.0, -(nowY-150)/150.0, 0);
glutSolidTeapot(0.3);
glPopMatrix();
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);
}
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("3D");
glutDisplayFunc(display);
glutMotionFunc(motion);
glutKeyboardFunc(keyboard);
glutMainLoop();
}
執行按 r ,茶壺會隨便亂動
【課堂作業 四】
可以動每個關節。
#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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