1 files changed, 58 insertions, 0 deletions
diff --git a/thirdparty/misc/open-simplex-noise.h b/thirdparty/misc/open-simplex-noise.h
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+++ b/thirdparty/misc/open-simplex-noise.h
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+#ifndef OPEN_SIMPLEX_NOISE_H__
+#define OPEN_SIMPLEX_NOISE_H__
+
+/*
+ * OpenSimplex (Simplectic) Noise in C.
+ * Ported to C from Kurt Spencer's java implementation by Stephen M. Cameron
+ *
+ * v1.1 (October 6, 2014) 
+ * - Ported to C
+ * 
+ * v1.1 (October 5, 2014)
+ * - Added 2D and 4D implementations.
+ * - Proper gradient sets for all dimensions, from a
+ *   dimensionally-generalizable scheme with an actual
+ *   rhyme and reason behind it.
+ * - Removed default permutation array in favor of
+ *   default seed.
+ * - Changed seed-based constructor to be independent
+ *   of any particular randomization library, so results
+ *   will be the same when ported to other languages.
+ */
+
+#if ((__GNUC_STDC_INLINE__) || (__STDC_VERSION__ >= 199901L))
+	#include <stdint.h>
+	#define INLINE inline
+#elif (defined (_MSC_VER) || defined (__GNUC_GNU_INLINE__))
+	#include <stdint.h>
+	#define INLINE __inline
+#else 
+	/* ANSI C doesn't have inline or stdint.h. */
+	#define INLINE
+#endif
+
+#ifdef __cplusplus
+	extern "C" {
+#endif
+
+// -- GODOT start --
+// Modified to work without allocating memory, also removed some unused function. 
+
+struct osn_context {
+	int16_t perm[256];
+	int16_t permGradIndex3D[256];
+};
+
+int open_simplex_noise(int64_t seed, struct osn_context *ctx);
+//int open_simplex_noise_init_perm(struct osn_context *ctx, int16_t p[], int nelements);
+// -- GODOT end --
+void open_simplex_noise_free(struct osn_context *ctx);
+double open_simplex_noise2(struct osn_context *ctx, double x, double y);
+double open_simplex_noise3(struct osn_context *ctx, double x, double y, double z);
+double open_simplex_noise4(struct osn_context *ctx, double x, double y, double z, double w);
+
+#ifdef __cplusplus
+	}
+#endif
+
+#endif