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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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impression
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sspntgen.c
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1994-08-01
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/*
* 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* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;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 Unpublished -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.
*/
/*
* ssgen -
* Use a set of point sample locations to generate a
* sample set.
*
* Paul Haeberli - 1989
*/
#include "stdio.h"
#include "ss.h"
#include "math.h"
int npoints;
float xpoints[100];
float ypoints[100];
main(argc,argv)
int argc;
char **argv;
{
sampleset *oss;
int nx, ny;
if( argc<5 ) {
fprintf(stderr,"usage: ssgen in.pnts out.ss nx ny\n");
exit(1);
}
readpoints(argv[1]);
nx = atoi(argv[3]);
ny = atoi(argv[4]);
oss = ssnew();
sspntsgen(oss,nx,nx);
sstofile(argv[2],oss);
}
sspntsgen(oss,nx,ny)
sampleset *oss;
int nx, ny;
{
sample *ns;
float xpos, ypos;
int i, x, y;
float bx, by, sx, sy;
sx = 1.0/nx;
sy = 1.0/ny;
for(y=0; y<nx; y++) {
for(x=0; x<nx; x++) {
bx = (float)x/nx;
by = (float)y/ny;
for(i=0; i<npoints; i++) {
xpos = bx + sx*xpoints[i];
ypos = by + sy*ypoints[i];
ns = (sample *)malloc(sizeof(sample));
ns->xpos = POSSCALE*xpos;
ns->ypos = POSSCALE*ypos;
ns->r = 0;
ns->g = 0;
ns->b = 0;
ns->a = 0;
ns->SAMPLE_SIZE = 60;
ns->SAMPLE_DIR = -256/8;
ns->SAMPLE_SHAPE = FINELINES;
addsample(oss,ns);
}
}
}
}
readpoints(name)
char *name;
{
FILE *inf;
int i;
float x, y;
inf = fopen(name,"r");
if(!inf) {
fprintf(stderr,"sspntgen: can't open input file\n");
exit(1);
}
fscanf(inf,"%d\n",&npoints);
for(i=0; i<npoints; i++) {
fscanf(inf,"%f %f\n",&x,&y);
xpoints[i] = x;
ypoints[i] = y;
}
fclose(inf);
}