+extern FlagDesc flagdesc_noiseparams[];
+
+class PseudoRandom
+{
+public:
+ PseudoRandom(): m_next(0)
+ {
+ }
+ PseudoRandom(int seed): m_next(seed)
+ {
+ }
+ void seed(int seed)
+ {
+ m_next = seed;
+ }
+ // Returns 0...PSEUDORANDOM_MAX
+ int next()
+ {
+ m_next = m_next * 1103515245 + 12345;
+ return((unsigned)(m_next/65536) % (PSEUDORANDOM_MAX + 1));
+ }
+ int range(int min, int max)
+ {
+ if (max-min > (PSEUDORANDOM_MAX + 1) / 10)
+ {
+ //dstream<<"WARNING: PseudoRandom::range: max > 32767"<<std::endl;
+ assert(0);
+ }
+ if(min > max)
+ {
+ assert(0);
+ return max;
+ }
+ return (next()%(max-min+1))+min;
+ }
+private:
+ int m_next;
+};
+
+#define NOISE_FLAG_DEFAULTS 0x01
+#define NOISE_FLAG_EASED 0x02
+#define NOISE_FLAG_ABSVALUE 0x04
+
+//// TODO(hmmmm): implement these!
+#define NOISE_FLAG_POINTBUFFER 0x08
+#define NOISE_FLAG_SIMPLEX 0x10
+
+struct NoiseParams {
+ float offset;
+ float scale;
+ v3f spread;
+ s32 seed;
+ u16 octaves;
+ float persist;
+ float lacunarity;
+ u32 flags;
+
+ NoiseParams() {
+ offset = 0.0f;
+ scale = 1.0f;
+ spread = v3f(250, 250, 250);
+ seed = 12345;
+ octaves = 3;
+ persist = 0.6f;
+ lacunarity = 2.0f;
+ flags = NOISE_FLAG_DEFAULTS;
+ }
+
+ NoiseParams(float offset_, float scale_, v3f spread_, s32 seed_,
+ u16 octaves_, float persist_, float lacunarity_,
+ u32 flags_=NOISE_FLAG_DEFAULTS)
+ {
+ offset = offset_;
+ scale = scale_;
+ spread = spread_;
+ seed = seed_;
+ octaves = octaves_;
+ persist = persist_;
+ lacunarity = lacunarity_;
+ flags = flags_;
+ }
+};
+
+
+// Convenience macros for getting/setting NoiseParams in Settings as a string
+// WARNING: Deprecated, use Settings::getNoiseParamsFromValue() instead
+#define NOISEPARAMS_FMT_STR "f,f,v3,s32,u16,f"
+//#define getNoiseParams(x, y) getStruct((x), NOISEPARAMS_FMT_STR, &(y), sizeof(y))
+//#define setNoiseParams(x, y) setStruct((x), NOISEPARAMS_FMT_STR, &(y))
+
+class Noise {
+public:
+ NoiseParams np;
+ int seed;
+ int sx;
+ int sy;
+ int sz;
+ float *noise_buf;
+ float *gradient_buf;
+ float *persist_buf;
+ float *result;
+
+ Noise(NoiseParams *np, int seed, int sx, int sy, int sz=1);
+ ~Noise();
+
+ void setSize(int sx, int sy, int sz=1);
+ void setSpreadFactor(v3f spread);
+ void setOctaves(int octaves);
+
+ void gradientMap2D(
+ float x, float y,
+ float step_x, float step_y,
+ int seed);
+ void gradientMap3D(
+ float x, float y, float z,
+ float step_x, float step_y, float step_z,
+ int seed);
+
+ float *perlinMap2D(float x, float y, float *persistence_map=NULL);
+ float *perlinMap3D(float x, float y, float z, float *persistence_map=NULL);
+
+ inline float *perlinMap2D_PO(float x, float xoff, float y, float yoff,
+ float *persistence_map=NULL)
+ {
+ return perlinMap2D(
+ x + xoff * np.spread.X,
+ y + yoff * np.spread.Y,
+ persistence_map);
+ }
+
+ inline float *perlinMap3D_PO(float x, float xoff, float y, float yoff,
+ float z, float zoff, float *persistence_map=NULL)
+ {
+ return perlinMap3D(
+ x + xoff * np.spread.X,
+ y + yoff * np.spread.Y,
+ z + zoff * np.spread.Z,
+ persistence_map);
+ }
+
+private:
+ void allocBuffers();
+ void resizeNoiseBuf(bool is3d);
+ void updateResults(float g, float *gmap, float *persistence_map, size_t bufsize);
+
+};
+
+float NoisePerlin2D(NoiseParams *np, float x, float y, int seed);
+float NoisePerlin3D(NoiseParams *np, float x, float y, float z, int seed);
+
+inline float NoisePerlin2D_PO(NoiseParams *np, float x, float xoff,
+ float y, float yoff, int seed)
+{
+ return NoisePerlin2D(np,
+ x + xoff * np->spread.X,
+ y + yoff * np->spread.Y,
+ seed);
+}
+
+inline float NoisePerlin3D_PO(NoiseParams *np, float x, float xoff,
+ float y, float yoff, float z, float zoff, int seed)
+{
+ return NoisePerlin3D(np,
+ x + xoff * np->spread.X,
+ y + yoff * np->spread.Y,
+ z + zoff * np->spread.Z,
+ seed);
+}