Return to rectxrect.3r CVS log

Up to [Research Unix] / researchv10dc / 630 / man / src / p_man / man3

researchv10 Dan Cross

.ds ZZ DEVELOPMENT PACKAGE
.TH RECTXRECT 3R "630 MTG"
.XE "rectXrect()"
.SH NAME  
rectxrect: rectXrect \- check for overlapping Rectangles
.SH SYNOPSIS
.ft B
#include <dmd.h>
.sp
int rectXrect (r, s)
.br
Rectangle r, s; 
.SH DESCRIPTION
The
.I rectXrect
function
returns 1 if
.I r
and
.I s
share any point;
0, otherwise.
.SH EXAMPLE
The following routine will prompt the user to sweep out two
Rectangles with button 1.
If they intersect, the bell will ring.
Typing any key will exit the program.
.PP
.RS 3
.nf
.ft CM
    #include <dmd.h>

    int request();
    int wait();
    void box();
    void ringbell();
    Rectangle newrect();

    main()
    {
	Rectangle r, s;

	request (MOUSE|KBD);
	while (kbdchar () == -1) {
	    wait (MOUSE);

	    r = newrect (1, Rect(0,0,0,0));
	    box (&display, r, F_XOR);
	    s = newrect (1, Rect(0,0,0,0));
	    box (&display, s, F_XOR);
	    if (rectXrect (r, s))
		 ringbell ();
	    box (&display, r, F_XOR);
	    box (&display, s, F_XOR);

	    wait (MOUSE | KBD);
	}
    }
\fR
.fi
.RE
.SH SEE ALSO
structures(3R).

.RE

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.