File: xform.c

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//      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];
}