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Annotation of researchv10dc/630/man/src/p_man/man3/rectxrect.3r, revision 1.1

1.1     ! root        1: .ds ZZ DEVELOPMENT PACKAGE
        !             2: .TH RECTXRECT 3R "630 MTG"
        !             3: .XE "rectXrect()"
        !             4: .SH NAME  
        !             5: rectxrect: rectXrect \- check for overlapping Rectangles
        !             6: .SH SYNOPSIS
        !             7: .ft B
        !             8: #include <dmd.h>
        !             9: .sp
        !            10: int rectXrect (r, s)
        !            11: .br
        !            12: Rectangle r, s; 
        !            13: .SH DESCRIPTION
        !            14: The
        !            15: .I rectXrect
        !            16: function
        !            17: returns 1 if
        !            18: .I r
        !            19: and
        !            20: .I s
        !            21: share any point;
        !            22: 0, otherwise.
        !            23: .SH EXAMPLE
        !            24: The following routine will prompt the user to sweep out two
        !            25: Rectangles with button 1.
        !            26: If they intersect, the bell will ring.
        !            27: Typing any key will exit the program.
        !            28: .PP
        !            29: .RS 3
        !            30: .nf
        !            31: .ft CM
        !            32:     #include <dmd.h>
        !            33: 
        !            34:     int request();
        !            35:     int wait();
        !            36:     void box();
        !            37:     void ringbell();
        !            38:     Rectangle newrect();
        !            39: 
        !            40:     main()
        !            41:     {
        !            42:        Rectangle r, s;
        !            43: 
        !            44:        request (MOUSE|KBD);
        !            45:        while (kbdchar () == -1) {
        !            46:            wait (MOUSE);
        !            47: 
        !            48:            r = newrect (1, Rect(0,0,0,0));
        !            49:            box (&display, r, F_XOR);
        !            50:            s = newrect (1, Rect(0,0,0,0));
        !            51:            box (&display, s, F_XOR);
        !            52:            if (rectXrect (r, s))
        !            53:                 ringbell ();
        !            54:            box (&display, r, F_XOR);
        !            55:            box (&display, s, F_XOR);
        !            56: 
        !            57:            wait (MOUSE | KBD);
        !            58:        }
        !            59:     }
        !            60: \fR
        !            61: .fi
        !            62: .RE
        !            63: .SH SEE ALSO
        !            64: structures(3R).
        !            65: 
        !            66: .RE

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