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Annotation of researchv9/X11/src/X.V11R1/server/ddx/mi/mifpoly.h, revision 1.1.1.1

1.1       root        1: /* $Header: mifpoly.h,v 1.1 87/09/11 07:20:47 toddb Exp $ */
                      2: /***********************************************************
                      3: Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
                      4: and the Massachusetts Institute of Technology, Cambridge, Massachusetts.
                      5: 
                      6:                         All Rights Reserved
                      7: 
                      8: Permission to use, copy, modify, and distribute this software and its 
                      9: documentation for any purpose and without fee is hereby granted, 
                     10: provided that the above copyright notice appear in all copies and that
                     11: both that copyright notice and this permission notice appear in 
                     12: supporting documentation, and that the names of Digital or MIT not be
                     13: used in advertising or publicity pertaining to distribution of the
                     14: software without specific, written prior permission.  
                     15: 
                     16: DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
                     17: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
                     18: DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
                     19: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
                     20: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
                     21: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
                     22: SOFTWARE.
                     23: 
                     24: ******************************************************************/
                     25: 
                     26: #define EPSILON        0.000001
                     27: #define ISEQUAL(a, b) (fabs((a) - (b)) <= EPSILON)
                     28: #define WITHINHALF(a, b) (((a) - (b) > 0.0) ? (a) - (b) < 0.5 : \
                     29:                                             (b) - (a) <= 0.5)
                     30: #define ROUNDTOINT(x)   ((int) (((x) > 0.0) ? ((x) + 0.5) : ((x) - 0.5)))
                     31: #define ISZERO(x)      (fabs((x)) <= EPSILON)
                     32: #define PtEqual(a, b) (((a).x == (b).x) && ((a).y == (b).y))
                     33: 
                     34: #define NotEnd         0
                     35: #define FirstEnd       1
                     36: #define SecondEnd      2
                     37: 
                     38: /* Point with sub-pixel positioning.  In this case we use doubles, but
                     39:  * see mifpolycon.c for other suggestions 
                     40:  */
                     41: typedef struct _SppPoint {
                     42:        double  x, y;
                     43: } SppPointRec, *SppPointPtr;
                     44: 
                     45: extern SppPointRec miExtendSegment();

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