內插

#include <GL/glut.h>
float a=0;
float angle[20]={0,90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
float angleOld[20]={0,90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
float angleNew[20]={90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle[0],0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glPushMatrix();
glTranslatef(0.5,0,0);
glRotatef(angle[1],0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void keyboard(unsigned char key,int x, int y)
{
if(key=='r')
{
a+=0.1;
angle[0]=angleOld[0]*(1-a)+angleNew[0]*a;
angle[1]=angleOld[1]*(1-a)+angleNew[0]*a;
angle[2]=angleOld[2]*(1-a)+angleNew[0]*a;
angle[3]=angleOld[3]*(1-a)+angleNew[0]*a;
angle[4]=angleOld[4]*(1-a)+angleNew[0]*a;
angle[5]=angleOld[5]*(1-a)+angleNew[0]*a;
angle[6]=angleOld[6]*(1-a)+angleNew[0]*a;
angle[7]=angleOld[7]*(1-a)+angleNew[0]*a;
angle[8]=angleOld[8]*(1-a)+angleNew[0]*a;
angle[9]=angleOld[9]*(1-a)+angleNew[0]*a;
}
glutPostRedisplay();
}
int main()
{
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week15");

glutKeyboardFunc(keyboard);
glutDisplayFunc(display);
glutMainLoop();
}

void readNext()
{
a+=0.1;
for(int i=0;i<20;i++)angle[i]=angleOld[i]*(1-a)+angleNew[i]*a;
}
void timer(int t)
{
glutTimerFunc(100,timer,0);
readNext();
glutPostRedisplay();
}
void keyboard(unsigned char key,int x, int y)
{
if(key=='r')
{
readNext();
}else if(key=='p')
{
glutTimerFunc(0,timer,0);
}
glutPostRedisplay();
}

#include <stdio.h>
#include <GL/glut.h>
float a=0;
float angle[20]={0,90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
float angleOld[20]={0,90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
float angleNew[20]={90,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
int angleID=0;
FILE *fout=NULL, *fin=NULL;
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle[0],0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glPushMatrix();
glTranslatef(0.5,0,0);
glRotatef(angle[1],0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void readNext()
{
if(fin==NULL)fin=fopen("this is me file for animation.txt","r");
a+=0.01;
for(int i=0;i<20;i++)angle[i]=angleOld[i]*(1-a)+angleNew[i]*a;
if(a>=1.0){
a=0.0;
for(int i=0;i<20;i++){
angleOld[i]=angleNew[i];
fscanf(fin,"%f",&angleNew[i]);
}
}
}
int delay=0,increase=0;
void timer(int t)
{
glutTimerFunc(10+delay+increase,timer,0);
readNext();
glutPostRedisplay();
}
int oldX=0,oldY=0;
void mouse(int button,int state,int x,int y)
{
oldX=x;oldY=y;
}
void motion(int x,int y)
{
angle[angleID]+=(x-oldX);
oldX=x;
glutPostRedisplay();
}
void keyboard(unsigned char key,int x, int y)
{
if(key=='0')angleID=0;
if(key=='1')angleID=0;
if(key=='2')angleID=0;
if(key=='3')angleID=0;

if(key=='s'){
if(fout==NULL)fout=fopen("this_is_my_file_for_animation.txt","w+");
for(int i=0;i<20;i++){
printf("%f",angle[i]);
fprintf(fout,"%f",angle[i]);
}
printf("\n");
fprintf(fout,"\n");
}
if(key=='r')
{
readNext();
}else if(key=='p')
{
delay+=10;
}else if(key=='i')
{
increase-=10;
}
glutPostRedisplay();
}
int main()
{
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("week15");

glutKeyboardFunc(keyboard);
glutMotionFunc(motion);
glutMouseFunc(mouse);
glutDisplayFunc(display);
glutMainLoop();  
}