week15

#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 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[1]*a;

         angle[2]=angleOld[2]*(1-a)+angleNew[2]*a;

         angle[3]=angleOld[3]*(1-a)+angleNew[3]*a;

         angle[4]=angleOld[4]*(1-a)+angleNew[4]*a;

         angle[5]=angleOld[5]*(1-a)+angleNew[5]*a;

         angle[6]=angleOld[6]*(1-a)+angleNew[6]*a;

         angle[7]=angleOld[7]*(1-a)+angleNew[7]*a;

         angle[8]=angleOld[8]*(1-a)+angleNew[8]*a;

         angle[9]=angleOld[9]*(1-a)+angleNew[9]*a;

}

glutPostRedisplay();

}

int main()

{

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("Week15");

glutKeyboardFunc(keyboard);

glutDisplayFunc(display);

glutMainLoop();

}