可以自由做出想要的動作之後,接著就可以開始製作動畫了
動畫是由很多個動作所組成的,因此我們需要一張包含所有動作的清單。
在此之前,先來了解如何創建檔案
先建立一個空資料夾
創建一個檔案(week14_1.cpp)
放入程式碼:
#include <stdio.h>
int main()
{
///如何寫檔:
FILE*fout=fopen("file.txt","w+");
fprintf(fout,"angle1 %d\n", 999);
fclose(fout);
///如何讀檔:
char line[200];
int a;
FILE*fin=fopen("file.txt","r");
fscanf(fin, "%s %d",line,&a);
printf("Char:%s Int:%d\n",line,a);
fclose(fin);
}
不需要在意file.txt,等等他會自己生成
現在,資料應該可以被正常讀取了
#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<8;i++){
printf("%.2f ",angle[i]);
fprintf(fout,"%.2f",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<8; i++){
fscanf(fin,"%f",&angle[i]);
}
glutPostRedisplay();
}
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();
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1,1,1);
glRectf(0.3,0.5,-0.3,-0.2);
glPushMatrix();
glTranslatef(0.3,0.5,0);
glRotatef(angle[0],0,0,1);
glTranslatef(-0.3,-0.4,0);
glColor3f(1,0,0);
glRectf(0.3,0.5,0.8,0.3);
glPushMatrix();
glTranslatef(0.8,0.4,0);
glRotatef(angle[1],0,0,1);
glTranslatef(-0.8,-0.4,0);
glColor3f(0,1,0);
glRectf(0.8,0.5,1.1,0.3);
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.3,0.5,0);
glRotatef(angle[2],0,0,1);
glTranslatef(0.3,-0.4,0);
glColor3f(1,0,0);
glRectf(-0.3,0.5,-0.8,0.3);
glPushMatrix();
glTranslatef(-0.8,0.4,0);
glRotatef(angle[3],0,0,1);
glTranslatef(0.8,-0.4,0);
glColor3f(0,1,0);
glRectf(-0.8,0.5,-1.1,0.3);
glPopMatrix();
glPopMatrix();
glutSwapBuffers();
}
int main (int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week14_2");
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutDisplayFunc(display);
glutMainLoop();
return 0;
}
利用這項功能,我們可以輕鬆紀錄每個動作。但是因為寫檔程式會將全部的內容刪掉後重頭開始寫...所以一次不要做太多,並請務必備份!



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