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Код

#include <stdlib.h>

#include <math.h>

#include <time.h>

#include <stdio.h>

#include <GL/glut.h>  



int Width = 800;

int  Height = 600;

int x[8]={30,30,130,130,110,110,50,50};

int y[8]={200,320,320,200,200,300,300,200};  

int postx[8]={230,230,300,300,260,260,300,300};

int posty[8]={250,370,370,360,360,270,270,250,};





int risx[8]={30,30,130,130,110,110,50,50};

int risy[8]={200,320,320,200,200,300,300,200};

float t=0;

int STOP=0;



void Display(void)  

{

    glClearColor(0, 0, 0, 1);

    glClear(GL_COLOR_BUFFER_BIT); 

    





 glBegin(GL_LINE_LOOP);

 for(int i=0; i<8; i++)

 {

 glVertex2f(risx[i],risy[i]);

    }

 

 

 

 glEnd();











    glutSwapBuffers ();

  glFlush();  

     

}





void Reshape(GLint w, GLint h)  

{

    Width = w;

    Height = h;   

    glViewport(0, 0, w, h);                         

  glMatrixMode(GL_PROJECTION);                               

  glLoadIdentity();             

  glOrtho(0, w, 0, h, -1, 1);        

                                                           

}



void idle()

{

    if(STOP==0){

    for(int i=0; i<8; i++)

    {

        risx[i]=x[i]*(1-t)+t*postx[i];    

        risy[i]=y[i]*(1-t)+t*posty[i];    

    }    

    t+=0.0001;

    if(risx[1]==postx[1] && risy[1]==posty[1])

    STOP=1;

    }

    Display();

    

    

}

 

void Keyboard( unsigned char key, int x, int y ) 

{

#define ESCAPE '\033'



    if( key == ESCAPE )

        exit(0);

}





int main(int argc, char *argv[])  

{

    glutInit(&argc, argv);   



    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE);  



    glutInitWindowSize(Width, Height);  

   // glutWindowPosition(0,0);

    glutCreateWindow("ik");  

                                        

    glutIdleFunc(idle);



    glutDisplayFunc(Display); 



    glutReshapeFunc(Reshape); 



    glutKeyboardFunc(Keyboard);  



    glutMainLoop();  



}