2 * libwmfun - WindowMaker texture function library
3 * Copyright (C) 1999 Tobias Gloth
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
25 * Revision 1.1 2000/12/03 18:58:41 id
26 * initiate plugins branch
28 * Revision 1.1.1.1 1999/02/21 17:16:47 gloth
39 RImage *waves(int argc, char **argv, int width, int height, int relief)
42 int i, j, k, done, sine[256];
43 int from[3] = { 0x00, 0x00, 0x00 };
44 int to[3] = { 0xff, 0xff, 0xff };
45 int layers, range, dx[1000], dy[1000];
53 for (done = 0; !done;) {
54 static struct option long_options[] = {
60 c = getopt_long(argc, argv, "f:t:", long_options, &option_index);
67 if (!parse_color(optarg, from)) {
68 error("invalid color: %s\n", optarg);
73 if (!parse_color(optarg, to)) {
74 error("invalid color: %s\n", optarg);
87 if (!start_image("waves", argc, 2, 3, width, height, &image)) {
91 layers = atoi(argv[0]);
92 range = atoi(argv[1]);
105 for (i = 0; i < 256; i++) {
106 sine[i] = (int)(127.0 * sin(2.0 * M_PI * i / 256)) + 128;
111 for (i = 0; i < layers; i++) {
112 dx[i] = random_int(range) - range / 2;
113 dy[i] = random_int(range) - range / 2;
117 for (i = 0; i < height; i++) {
118 for (j = 0; j < width; j++) {
119 int output[3], value = 0;
120 for (k = 0; k < layers; k++) {
121 value += sine[(j * dx[k] + i * dy[k]) & 255];
123 interpolate_color(output, from, to, value / layers);
127 if (RRGBAFormat == image->format)