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researchv10 Dan Cross

.ds ZZ DEVELOPMENT PACKAGE
.TH FPT 3L "630 MTG"
.XE "fPt()"
.XE "fRpt()"
.XE "fRect()"
.SH NAME
fpt: fPt, fRpt, fRect \- create a Point or Rectangle from arguments
.SH SYNOPSIS
.ft B
#include <dmd.h>
.sp
Point fPt (x, y)
.br
int x, y;
.sp
Rectangle fRpt (p, q)
.br
Point p, q;
.sp
Rectangle fRect (a, b, c, d)
.br
int a, b, c, d;

.SH DESCRIPTION
.PP
The
.I fPt
function returns a point made from the two arguments.
.PP
The
.I fRpt
function returns a rectangle made from the two points.
.PP
The
.I fRect
function returns a rectangle made from the four arguments.
This function differs from \fIcanon(3R)\fR in that the points are not sorted first
to guarantee a positive area.
.PP
The above functions are not macros as are the ones in \fIpt(3L)\fR; therefore,
allow C language assignment constructs.
.SH EXAMPLE
The following subroutine draws two boxes in the upper
left corner of the window.
.nf
.ft CM
#include <dmd.h>

Point fPt();
Rectangle fRpt();
Rectangle fRect();

Point add();
Rectangle raddp();

drawboxes()
{
	Rectangle r;
	
	r = fRpt(Drect.origin, add(Drect.origin, Pt(100,100)));
	box(&display, r, F_STORE);

	r = fRect(0,0,200,200);
	box(&display, raddp(r, Drect.origin), F_STORE);
}
\fR
.fi
.RE
.SH SEE ALSO
canon(3R), pt(3L).

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