# Implementation of 3D Transformation in Computer Graphics

To write a C program to implement 3D transformations. 3 Dimensional Transformation
ALGORITHM 3 Dimensional Transformation Source Code
1. Enter the choice for transformation.
2. Perform the translation, rotation, scaling of 3D object.
3. Get the needed parameters for the transformation from the user.
4. Increase of rotation, object can be rotated about x or y or z axis.
5. Display the transmitted object in the screen
Source Code Programming Algorithm
#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>
int maxx,maxy,midx,midy;
void axis()
{
getch();
cleardevice();
line(midx,0,midx,maxy);
line(0,midy,maxx,midy);
}
void main()
{
int gd,gm,x,y,z,o,x1,x2,y1,y2;
detectgraph(&gd,&gm);
initgraph(&gd,&gm,"d:\\tc\\bgi");
setfillstyle(0,getmaxcolor());
maxx=getmaxx();
maxy=getmaxy();
midx=maxx/2;
midy=maxy/2;
axis();
bar3d(midx+100,midy-150,midx+60,midy-100,10,1);
printf("\Enter the translation factor");
scanf("%d%d",&x,&y);
axis();
printf("After translation");
bar3d(midx+100,midy-150,midx+60,midy-100,10,1);
bar3d(midx+x+100,midy-(y+150),midx+x+60,midy-(y+100),10,1);
axis();
bar3d(midx+100,midy-150,midx+60,midy-100,10,1);
printf("Enter the scaling factor");
scanf("%d%d%d",&x,&y,&z);
axis();
printf("After scaling");
bar3d(midx+100,midy-150,midx+60,midy-100,10,1);
bar3d(midx+(x*100),midy-(y*150),midx+(x*60),midy-(y*100),10*z,1);
axis();
bar3d(midx+100,midy-150,midx+60,midy-100,10,1);
printf("Enter the rotation angle");
scanf("%d",&o);
x1=50*cos(o*3.14/180)-100*sin(o*3.14/180);
y1=50*sin(o*3.14/180)+100*cos(o*3.14/180);
x2=60*cos(o*3.14/180)-90*sin(o*3.14/180);
y2=60*sin(o*3.14/180)+90*cos(o*3.14/180);
axis();
bar3d(midx+100,midy-150,midx+60,midy-100,10,1);
bar3d(midx+x1,midy-y1,midx+x2,midy-y2,10,1);
axis();
bar3d(midx+100,midy-150,midx+60,midy-100,10,1);
bar3d(midx+100,midy-x1,midx+60,midy-x2,10,1);
axis();