<xmp>UNKNOWN
//**************************************
// Name: Window to Viewport Mapping
// Description:Window to Viewport Mapping 
To create an object and map it into a viewport ..
// By: Rekha Ram Chaudhary
//
//
// Inputs:None
//
// Returns:None
//
//Assumes:None
//
//Side Effects:None
//This code is copyrighted and has limited warranties.
//Please see http://www.Planet-Source-Code.com/xq/ASP/txtCodeId.13855/lngWId.3/qx/vb/scripts/ShowCode.htm
//for details.
//**************************************

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>
main()

    {	float sx,sy;
    		int w1,w2,w3,w4,x1,x2,x3,x4,y1,y2,y3,y4,v1,v2,v3,v4;
    		int gd=DETECT,gm;
    		initgraph(&gd,&gm,"c:\\tc\\bgi");
    		printf("Enter The Coordinate x1,y1,x2,y2,x3,y3\n");
    		scanf("%d%d%d%d%d%d",&x1,&y1,&x2,&y2,&x3,&y3);
    		cleardevice();
    		w1=5;
    		w2=5;
    		w3=635;
    		w4=465;
    		rectangle(w1,w2,w3,w4);
    		line(x1,y1,x2,y2);
    		line(x2,y2,x3,y3);
    		line(x3,y3,x1,y1);
    		getch();
    		v1=425;
    		v2=75;
    		v3=550;
    		v4=250;
    		sx=(float)(v3-v1)/(w3-w1);
    		sy=(float)(v4-v2)/(w4-w2);
    		rectangle(v1,v2,v3,v4);
    		x1=v1+floor(((float)(x1-w1)*sx)+.5);
    		x2=v1+floor(((float)(x2-w1)*sx)+.5);
    		x3=v1+floor(((float)(x3-w1)*sx)+.5);
    		y1=v2+floor(((float)(y1-w2)*sy)+.5);
    		y2=v2+floor(((float)(y2-w2)*sy)+.5);
    		y3=v2+floor(((float)(y3-w2)*sy)+.5);
    		line(x1,y1,x2,y2);
    		line(x2,y2,x3,y3);
    		line(x3,y3,x1,y1);
    			getch();
    return 0;
}

		</xmp>