blob: e1193d722a702576b88098b4cd6c6c9df51d3d6e [file] [log] [blame]
 /* * PerlinNoise.hpp * * Created on: Jul 11, 2008 * Author: pete */ #ifndef PERLINNOISE_HPP_ #define PERLINNOISE_HPP_ #include class PerlinNoise { public: float noise_lq[256][256]; float noise_lq_lite[32][32]; float noise_mq[256][256]; float noise_hq[256][256]; float noise_perlin[512][512]; float noise_lq_vol[32][32][32]; float noise_hq_vol[32][32][32]; PerlinNoise(); virtual ~PerlinNoise(); private: static inline float noise( int x) { x = (x<<13)^x; return (((x * (x * x * 15731 + 789221) + 1376312589) & 0x7fffffff) / 2147483648.0); } static inline float noise(int x, int y) { int n = x + y * 57; return noise(n); } static inline float noise(int x, int y, int z) { int n = x + y * 57 + z * 141; return noise(n); } static inline float cos_interp(float a, float b, float x) { float ft = x * 3.1415927; float f = (1 - cos(ft)) * .5; return a*(1-f) + b*f; } static inline float cubic_interp(float v0, float v1, float v2, float v3, float x) { float P = (v3 - v2) - (v0 - v1); float Q = (v0 - v1) - P; float R = v2 - v0; return P*pow(x,3) + Q * pow(x,2) + R*x + v1; } static inline float InterpolatedNoise(float x, float y) { int integer_X = int(x); float fractional_X = x - integer_X; int integer_Y = int(y); float fractional_Y = y - integer_Y; float a0 = noise(integer_X - 1, integer_Y - 1); float a1 = noise(integer_X, integer_Y - 1); float a2 = noise(integer_X + 1, integer_Y - 1); float a3 = noise(integer_X + 2, integer_Y - 1); float x0 = noise(integer_X - 1, integer_Y); float x1 = noise(integer_X, integer_Y); float x2 = noise(integer_X + 1, integer_Y); float x3 = noise(integer_X + 2, integer_Y); float y0 = noise(integer_X + 0, integer_Y + 1); float y1 = noise(integer_X, integer_Y + 1); float y2 = noise(integer_X + 1, integer_Y + 1); float y3 = noise(integer_X + 2, integer_Y + 1); float b0 = noise(integer_X - 1, integer_Y + 2); float b1 = noise(integer_X, integer_Y + 2); float b2 = noise(integer_X + 1, integer_Y + 2); float b3 = noise(integer_X + 2, integer_Y + 2); float i0 = cubic_interp(a0 , a1, a2, a3, fractional_X); float i1 = cubic_interp(x0 , x1, x2, x3, fractional_X); float i2 = cubic_interp(y0 , y1, y2, y3, fractional_X); float i3 = cubic_interp(b0 , b1, b2, b3, fractional_X); return cubic_interp(i0, i1 , i2 , i3, fractional_Y); } static inline float perlin_octave_2d(float x,float y, int width, int seed, float period) { float freq=1/(float)(period); int num=(int)(width*freq); int step_x=(int)(x*freq); int step_y=(int)(y*freq); float zone_x=x*freq-step_x; float zone_y=y*freq-step_y; int box=step_x+step_y*num; int noisedata=(box+seed); float u=cubic_interp(noise(noisedata-num-1),noise(noisedata-num),noise(noisedata-num+1),noise(noisedata-num+2),zone_x); float a=cubic_interp(noise(noisedata-1),noise(noisedata),noise(noisedata+1),noise(noisedata+2),zone_x); float b=cubic_interp(noise(noisedata+num -1),noise(noisedata+num),noise(noisedata+1+num),noise(noisedata+2+num),zone_x); float v=cubic_interp(noise(noisedata+2*num -1),noise(noisedata+2*num),noise(noisedata+1+2*num),noise(noisedata+2+2*num),zone_x); float value=cubic_interp(u,a,b,v,zone_y); return value; } static inline float perlin_octave_2d_cos(float x,float y, int width, int seed, float period) { float freq=1/(float)(period); int num=(int)(width*freq); int step_x=(int)(x*freq); int step_y=(int)(y*freq); float zone_x=x*freq-step_x; float zone_y=y*freq-step_y; int box=step_x+step_y*num; int noisedata=(box+seed); float a=cos_interp(noise(noisedata),noise(noisedata+1),zone_x); float b=cos_interp(noise(noisedata+num),noise(noisedata+1+num),zone_x); float value=cos_interp(a,b,zone_y); return value; } static inline float perlin_octave_3d(float x,float y, float z,int width, int seed, float period) { float freq=1/(float)(period); int num=(int)(width*freq); int step_x=(int)(x*freq); int step_y=(int)(y*freq); int step_z=(int)(z*freq); float zone_x=x*freq-step_x; float zone_y=y*freq-step_y; float zone_z=z*freq-step_z; int boxB=step_x+step_y+step_z*num; int boxC=step_x+step_y+step_z*(num+1); int boxD=step_x+step_y+step_z*(num+2); int boxA=step_x+step_y+step_z*(num-1); float u,a,b,v,noisedata,box; box = boxA; noisedata=(box+seed); u=cubic_interp(noise(noisedata-num-1),noise(noisedata-num),noise(noisedata-num+1),noise(noisedata-num+2),zone_x); a=cubic_interp(noise(noisedata-1),noise(noisedata),noise(noisedata+1),noise(noisedata+2),zone_x); b=cubic_interp(noise(noisedata+num -1),noise(noisedata+num),noise(noisedata+1+num),noise(noisedata+2+num),zone_x); v=cubic_interp(noise(noisedata+2*num -1),noise(noisedata+2*num),noise(noisedata+1+2*num),noise(noisedata+2+2*num),zone_x); float A=cubic_interp(u,a,b,v,zone_y); box = boxB; noisedata=(box+seed); u=cubic_interp(noise(noisedata-num-1),noise(noisedata-num),noise(noisedata-num+1),noise(noisedata-num+2),zone_x); a=cubic_interp(noise(noisedata-1),noise(noisedata),noise(noisedata+1),noise(noisedata+2),zone_x); b=cubic_interp(noise(noisedata+num -1),noise(noisedata+num),noise(noisedata+1+num),noise(noisedata+2+num),zone_x); v=cubic_interp(noise(noisedata+2*num -1),noise(noisedata+2*num),noise(noisedata+1+2*num),noise(noisedata+2+2*num),zone_x); float B=cubic_interp(u,a,b,v,zone_y); box = boxC; noisedata=(box+seed); u=cubic_interp(noise(noisedata-num-1),noise(noisedata-num),noise(noisedata-num+1),noise(noisedata-num+2),zone_x); a=cubic_interp(noise(noisedata-1),noise(noisedata),noise(noisedata+1),noise(noisedata+2),zone_x); b=cubic_interp(noise(noisedata+num -1),noise(noisedata+num),noise(noisedata+1+num),noise(noisedata+2+num),zone_x); v=cubic_interp(noise(noisedata+2*num -1),noise(noisedata+2*num),noise(noisedata+1+2*num),noise(noisedata+2+2*num),zone_x); float C=cubic_interp(u,a,b,v,zone_y); box = boxD; noisedata=(box+seed); u=cubic_interp(noise(noisedata-num-1),noise(noisedata-num),noise(noisedata-num+1),noise(noisedata-num+2),zone_x); a=cubic_interp(noise(noisedata-1),noise(noisedata),noise(noisedata+1),noise(noisedata+2),zone_x); b=cubic_interp(noise(noisedata+num -1),noise(noisedata+num),noise(noisedata+1+num),noise(noisedata+2+num),zone_x); v=cubic_interp(noise(noisedata+2*num -1),noise(noisedata+2*num),noise(noisedata+1+2*num),noise(noisedata+2+2*num),zone_x); float D=cubic_interp(u,a,b,v,zone_y); float value =cubic_interp(A,B,C,D,zone_z); return value; } static inline float perlin_noise_2d(int x, int y, int width, int octaves, int seed, float persistance, float basePeriod) { float p = persistance; float val = 0.0; for (int i = 0; i