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https://github.com/gryf/wmaker.git
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135 lines
2.8 KiB
C
135 lines
2.8 KiB
C
/*
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* libwmfun - WindowMaker texture function library
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* Copyright (C) 1999 Tobias Gloth
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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/*
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* $Id$
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*
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* $Log$
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* Revision 1.1 2000/12/03 18:58:41 id
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* initiate plugins branch
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*
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* Revision 1.1.1.1 1999/02/21 17:16:47 gloth
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* initial revision
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*
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*/
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#include "getopt.h"
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#include <math.h>
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#include <stdlib.h>
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#include <time.h>
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#include "generic.h"
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RImage *waves (int argc, char **argv, int width, int height, int relief) {
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int i, j, k, done, sine [256];
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int from[3] = { 0x00, 0x00, 0x00 };
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int to[3] = { 0xff, 0xff, 0xff };
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int layers, range, dx[1000], dy[1000];
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RImage *image;
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unsigned char *cptr;
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int option_index = 0;
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int c;
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optind = 1;
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for (done=0; !done; ) {
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static struct option long_options[] = {
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{"from", 1, 0, 'f'},
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{"to", 1, 0, 't'},
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{0, 0, 0, 0}
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};
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c = getopt_long (argc, argv, "f:t:",
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long_options, &option_index);
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if (c == -1) {
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break;
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}
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switch (c) {
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case 'f':
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if (!parse_color (optarg, from)) {
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error ("invalid color: %s\n", optarg);
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return 0;
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}
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break;
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case 't':
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if (!parse_color (optarg, to)) {
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error ("invalid color: %s\n", optarg);
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return 0;
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}
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break;
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default:
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done = 1;
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break;
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}
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}
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argc -= optind;
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argv += optind;
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if (!start_image ("waves", argc, 2, 3, width, height, &image)) {
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return (RImage *)0;
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}
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layers = atoi (argv[0]);
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range = atoi (argv[1]);
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if (layers <= 0) {
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layers = 1;
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}
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if (layers > 256) {
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layers = 256;
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}
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if (range <= 0) {
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range = 1;
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}
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for (i=0; i<256; i++) {
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sine[i] = (int) (127.0 * sin (2.0 * M_PI * i / 256)) + 128;
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}
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srand (time (0));
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for (i=0; i<layers; i++) {
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dx[i] = random_int (range) - range / 2;
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dy[i] = random_int (range) - range / 2;
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}
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cptr = image->data;
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for (i=0; i<height; i++) {
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for (j=0; j<width; j++) {
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int output[3], value = 0;
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for (k=0; k<layers; k++) {
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value += sine[(j*dx[k]+i*dy[k]) & 255];
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}
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interpolate_color (output, from, to, value / layers);
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*cptr++ = output[0];
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*cptr++ = output[1];
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*cptr++ = output[2];
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if ( RRGBAFormat==image->format )
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cptr++;
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}
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}
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return image;
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}
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