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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 4.iso
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src
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haeberli
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autopaint
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modpos.c
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C/C++ Source or Header
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1994-08-01
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1KB
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51 lines
/*
* Copyright 1991, 1992, 1993, 1994, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
* the contents of this file may not be disclosed to third parties, copied or
* duplicated in any form, in whole or in part, without the prior written
* permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to restrictions
* as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
* and Computer Software clause at DFARS 252.227-7013, and/or in similar or
* successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
* rights reserved under the Copyright Laws of the United States.
*/
#include "math.h"
#include "vect.h"
#include "canvas.h"
static float posdelta;
static float griddelta;
setposdelta(mag)
float mag;
{
posdelta = mag;
}
setgriddelta(space)
float space;
{
griddelta = space;
}
modpos(pos,rscale)
vect *pos;
float rscale;
{
float circx, circy;
rscale = 0.50*rscale;
getcircpos(&circx,&circy);
pos->x += rscale*posdelta*circx;
pos->y += rscale*posdelta*circy;
if(griddelta>0.0) {
pos->x = griddelta*ffloor((pos->x/griddelta)+0.5);
pos->y = griddelta*ffloor((pos->y/griddelta)+0.5);
}
}