內插茶壺R

#include<GL/glut.h>
float a=0;
float angle[20]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
float angleOld[20]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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();
glutSwapBuffers();
}
void timer(int t)
{
}
void keyboard(unsigned char key,int x,int y)
{
if(key=='s'){
}else if(key=='r'){
a+=0.1;
angle[0]=angleOld[0]*(1-a)+angleNew[0]*a;
glutPostRedisplay();
}else if(key=='p'){
}
}
int main()
{
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("01160324");
glutKeyboardFunc(keyboard);
glutDisplayFunc(display);
glutMainLoop();
}

#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();
glTranslatef(angle[3], angle[4], angle[5]);
glPushMatrix();
glColor3f(1,0,0);
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();
glPopMatrix();
glutSwapBuffers();
}

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(50, 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();
}

int main()
{
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week15");

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