3 DIMENSIONAL ROTATION

3 DIMENSIONAL ROTATION

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

#include<math.h>

float px[10],py[10],tx[10],ty[10],tx2[10],ty2[10],px2[10],py2[10];

void disp1();

void disp2();

void rotation();

float depth,vertices;

void main()

{

            int gd=DETECT,gm,i;

            initgraph(&gd,&gm,"");

            if(graphresult()!=grOk)

            {

                        printf("Graphics error");

                        getch();

                        return;

            }

            printf("Enter number of vertices : ");

            scanf("%f",&vertices);

            printf("Enter the depth value : ");

            scanf("%f",&depth);

            printf("Enter the x and y coordinates : ");

            for(i=0;i<vertices;i++)

            {

                        scanf("%f%f",&px[i],&py[i]);

                        px2[i]=px[i]+depth;

                        py2[i]=py[i]+depth;

            }

            disp1();

            rotation();

            disp2();

            getch();

}

void disp1()

{

            int i;

            for(i=0;i<vertices-1;i++)

            {

                         line(px[i],py[i],px[i+1],py[i+1]);

                         line(px2[i],py2[i],px2[i+1],py2[i+1]);

            }

             line(px[vertices-1],py[vertices-1],px[0],py[0]);

             line(px2[vertices-1],py2[vertices-1],px2[0],py2[0]);

            for(i=0;i<vertices;i++)

            line(px[i],py[i],px2[i],py2[i]);

}

void disp2()

{

            int i;

            for(i=0;i<vertices-1;i++)

            {

                        line(tx[i],ty[i],tx[i+1],ty[i+1]);

                         line(tx2[i],ty2[i],tx2[i+1],ty2[i+1]);

            }

            line(tx[vertices-1],ty[vertices-1],tx[0],ty[0]);

            line(tx2[vertices-1],ty2[vertices-1],tx2[0],ty2[0]);

            for(i=0;i<vertices;i++)

                        line(tx[i],ty[i],tx2[i],ty2[i]);

}

void rotation()

{

            float i,an,rx,ry,dir,s,a;

            printf("Enter the rotation angle : ");

            scanf("%f",&an);

            printf("Enter the rotation point : ");

            scanf("%f%f",&rx,&ry);

            printf("Enter the dircetion of rotation [1 for clockwise / 2 for anticlockwise] : ");

            scanf("%f",&dir);

            if(dir==1)

                        s=1;

            else

                        s=-1;

            a=an*3.14/180;

            for(i=0;i<vertices;i++)

            {

                        tx[i]=rx+(px[i]-rx)*cos(a) - (py[i]-ry)*sin(a)*s;

                        ty[i]=ry+(px[i]-rx)*sin(a)*s  + (py[i]-ry)*cos(a);

                        tx2[i]=rx+(px2[i]-rx)*cos(a) - (py2[i]-ry)*sin(a)*s;

                        ty2[i]=ry+(px2[i]-rx)*sin(a)*s + (py2[i]-ry)*cos(a);

            }

}

                                    3-DIMENSIONAL ROTATION

OUTPUT:

Enter the number of vertices: 3

Enter the depth value : 20

Enter the x and y coordinates : 100

150

150

150

150

100

Enter the rotation angle: 30

Enter the rotation point : 50

50

Enter the direction of rotation (1-Clockwise, 2-Anticlockwise) : 1