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researchv10 Dan Cross

.ds ZZ DEVELOPMENT PACKAGE
.TH POINT 3R "630 MTG"
.XE "point()"
.SH NAME
point \- draw a single pixel in a Bitmap
.SH SYNOPSIS
.ft B
#include <dmd.h>
.sp
void point (b, p, f)
.br
Bitmap \(**b;
.br
Point p;
.br
Code f;
.SH DESCRIPTION
The
.I point
function
draws the pixel at Point
.I p
in the Bitmap
.I \(**b
according to function Code
.IR f .
.SH EXAMPLE
The following program determines the Point at the middle of
the window and draws it.  Hitting any key 
will exit the program.
.PP
.RS 3
.nf
.ft CM
#include <dmd.h>

Point middle();
Point add();
Point div();
Point sub();

main()
{
	Point centerdot;
	
	centerdot = middle();
	point (&display, centerdot, F_XOR);	
	request(KBD);
	wait(KBD);
}

Point middle()
{
	Point center, offset;

	offset = div (sub (Drect.corner,
		Drect.origin), 2);
	center = add (Drect.origin, offset);

	return center;
}
\fR
.fi
.RE
.SH SEE ALSO
jpoint(3R).

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