Path: utzoo!mnetor!uunet!husc6!bbn!rochester!PT.CS.CMU.EDU!IUS1.CS.CMU.EDU!edw
From: edw@IUS1.CS.CMU.EDU (Eddie Wyatt)
Newsgroups: comp.lang.c
Subject: asymmetric layout
Message-ID: <1136@PT.CS.CMU.EDU>
Date: 16 Mar 88 16:26:51 GMT
Sender: netnews@PT.CS.CMU.EDU
Organization: Carnegie-Mellon University, CS/RI
Lines: 79


  Way back whenever, someone posted a list of thou shall and thou shall not.
One item on that list was asymmetric layout of assignment.  Its use was
mainly to help the reader to distinguish assignment for equality
testing.   I've adopted a convention related to that topic
that others may find useful and thought I'd share it with all of
you.  (I'm such a nice guy :-))

 In code segments that contain a lot of assigments, align the equal
signs.  Example :


    cosyaw = cos(rotate[YYAW]);
    sinyaw = sin(rotate[YYAW]);

    cosroll = cos(rotate[RROLL]);
    sinroll = sin(rotate[RROLL]);

    cospitch = cos(rotate[PPITCH]);
    sinpitch = sin(rotate[PPITCH]);

    /* x - axis */
    yp = point[YY]*cosroll - point[ZZ]*sinroll;
    zp = point[YY]*sinroll + point[ZZ]*cosroll;

    point[YY] = yp;
    point[ZZ] = zp;

    /* y - axis */
    zp = point[ZZ]*cospitch - point[XX]*sinpitch;
    xp = point[ZZ]*sinpitch + point[XX]*cospitch;

    point[XX] = xp;
    point[ZZ] = zp;

    /* z - axis */
    xp = point[XX]*cosyaw - point[YY]*sinyaw;
    yp = point[XX]*sinyaw + point[YY]*cosyaw;
 
    point[XX] = xp;
    point[YY] = yp;

    
becomes:

    cosyaw              = cos(rotate[YYAW]);
    sinyaw              = sin(rotate[YYAW]);

    cosroll             = cos(rotate[RROLL]);
    sinroll             = sin(rotate[RROLL]);

    cospitch            = cos(rotate[PPITCH]);
    sinpitch            = sin(rotate[PPITCH]);

    /* x - axis */
    yp                  = point[YY]*cosroll - point[ZZ]*sinroll;
    zp                  = point[YY]*sinroll + point[ZZ]*cosroll;

    point[YY]           = yp;
    point[ZZ]           = zp;

    /* y - axis */
    zp                  = point[ZZ]*cospitch - point[XX]*sinpitch;
    xp                  = point[ZZ]*sinpitch + point[XX]*cospitch;

    point[XX]           = xp;
    point[ZZ]           = zp;

    /* z - axis */
    xp                  = point[XX]*cosyaw - point[YY]*sinyaw;
    yp                  = point[XX]*sinyaw + point[YY]*cosyaw;
 
    point[XX]           = xp;
    point[YY]           = yp;

Easier to read no?
-- 

Eddie Wyatt 				e-mail: edw@ius1.cs.cmu.edu