會有一個新的文字檔
程式碼
#include <stdio.h>
FILE *fout=NULL, *fin=NULL;
int main(int argc,char**argv)
{
if(fout==NULL) fout=fopen("output.txt", "w+");///假如fout是空的就打開output並寫入
///printf("Hello world");
fprintf(fout, "Hollow world");///輸入檔案(檔案,要輸入的東西)
}
2.
要設定freeglut的路徑跟咒語
要把freeglut..dll放進去
#include <stdio.h>
#include <GL/glut.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);
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("3D");
glutDisplayFunc(display);
glutMotionFunc(motion);
glutMainLoop();
}
用滑鼠點點點，可以抓XY的位置要關掉才可以存到TXT裡面
3.
讀剛剛的檔案
#include <stdio.h>
#include <GL/glut.h>
FILE *fout=NULL, *fin=NULL;///檔案的指標
int nowX=150, nowY=150;///等等讀檔案把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300*300 所以一半是150減150就變再-150&150
///在除150.0就會介於-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r會去讀一行XY
{
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();
}
300*300
一直按r他會照著剛剛滑鼠點的路徑跑
4.
讓機器人動
#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();
}
會多一個motion檔案裡面是移動的位置
按R會重播
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