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Annotation of researchv10dc/630/man/src/p_man/man3/rectarith.3r, revision 1.1.1.1

1.1       root        1: .ds ZZ DEVELOPMENT PACKAGE
                      2: .TH RECTARITH 3R "630 MTG"
                      3: .XE "raddp()"
                      4: .XE "rsubp()"
                      5: .SH NAME
                      6: rectarith: raddp, rsubp \- arithmetic on Rectangles
                      7: .SH SYNOPSIS
                      8: \f3
                      9: #include <dmd.h>
                     10: .br
                     11: Rectangle raddp (r, p)
                     12: .sp
                     13: Rectangle rsubp (r, p)
                     14: .sp
                     15: Rectangle r;
                     16: .br
                     17: Point p;
                     18: \fR
                     19: .SH DESCRIPTION
                     20: The
                     21: .I raddp
                     22: function
                     23: returns the Rectangle 
                     24: defined by
                     25: (\fBadd(r.origin, p)\fR, \fBadd(r.corner, p)\fR).
                     26: .PP
                     27: The
                     28: .I rsubp
                     29: function
                     30: returns the Rectangle 
                     31: defined by
                     32: .RB ( "sub(r.origin, p)" ,
                     33: .BR "sub(r.corner, p)" ).
                     34: .SH EXAMPLE
                     35: The following code will return a rectangle with the mouse coordinates
                     36: at the center of the box.
                     37: .PP
                     38: .RS 3
                     39: .ft CM
                     40: .nf
                     41: #include <dmd.h>
                     42: 
                     43: Rectangle 
                     44: makebox()
                     45: {
                     46: return (raddp (Rect(-15, -15, 15, 15),
                     47:           mouse.xy));
                     48: 
                     49: }
                     50: 
                     51: .ft R
                     52: .fi
                     53: .RE
                     54: .SH SEE ALSO
                     55: ptarith(3R), structures(3R).
                     56: .RE

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