File: xform.c

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/* $Id: xform.c,v 1.6 2002/12/03 08:39:28 airwin Exp $

	Example linear transformation function for contour plotter.
*/

#include "plplotP.h"

extern PLFLT tr[];

void 
xform(PLFLT x, PLFLT y, PLFLT * tx, PLFLT * ty)
{
    *tx = tr[0] * x + tr[1] * y + tr[2];
    *ty = tr[3] * x + tr[4] * y + tr[5];
}