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Annotation of researchv10dc/630/man/src/p_man/man3/pt.3l, revision 1.1.1.1

1.1       root        1: .TH PT 3L "630 MTG"
                      2: .XE "Pt()"
                      3: .XE "Rpt()"
                      4: .XE "Rect()"
                      5: .SH NAME
                      6: pt: Pt, Rpt, Rect \- create a Point or Rectangle from arguments
                      7: .SH SYNOPSIS
                      8: .ft B
                      9: #include <dmd.h>
                     10: .sp
                     11: Point Pt (x, y)
                     12: .br
                     13: int x, y;
                     14: .sp
                     15: Rectangle Rpt (p, q)
                     16: .br
                     17: Point p, q;
                     18: .sp
                     19: Rectangle Rect (a, b, c, d)
                     20: .br
                     21: int a, b, c, d;
                     22: .SH DESCRIPTION
                     23: These functions
                     24: are special macros that are
                     25: to be used
                     26: .B only
                     27: in an argument list to a function.
                     28: They are functionally equivalent to the ones in \fIfpt(3L)\fR but are
                     29: faster for the above situation. 
                     30: .PP
                     31: The
                     32: .I Pt
                     33: argument
                     34: passes a coordinate pair as a Point to a function.
                     35: .PP
                     36: The
                     37: .I Rpt
                     38: argument
                     39: passes two Points as a Rectangle to a function.
                     40: .PP
                     41: The
                     42: .I Rect
                     43: argument
                     44: passes four coordinates (two coordinate pairs) as a Rectangle to a function. 
                     45: .SH EXAMPLE
                     46: The following subroutine draws two boxes in the upper
                     47: left corner of the window.
                     48: .sp
                     49: .nf
                     50: .ft CM
                     51: #include <dmd.h>
                     52: 
                     53: drawboxes()
                     54: {
                     55:        Point add();
                     56:        Rectangle raddp();
                     57: 
                     58:        box(&display,
                     59:            Rpt(Drect.origin, add(Drect.origin, Pt(100,100))),
                     60:            F_STORE);
                     61: 
                     62:        box(&display,
                     63:            raddp(Rect(0,0,200,200), Drect.origin),
                     64:            F_STORE);
                     65: }
                     66: .fi
                     67: .ft 1
                     68: .PP
                     69: .SH SEE ALSO
                     70: fpt(3L).

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