added noise.*

1 files changed, 32 insertions, 0 deletions

diff --git a/src/noise.h b/src/noise.h
new file mode 100644
index 000000000..ee73aa3e1
--- /dev/null
+++ b/src/noise.h
@@ -0,0 +1,32 @@
+/*
+Minetest-c55
+Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef NOISE_HEADER
+#define NOISE_HEADER
+
+// Return value: -1 ... 1
+double noise2d(int x, int y, int seed);
+
+double noise2d_gradient(double x, double y, int seed);
+
+double noise2d_perlin(double x, double y, int seed,
+		int octaves, double persistence);
+
+#endif
+