2 #include "../dpdefs/csprogsdefs.qh"
9 class(Noise) .float noise_baccum;
10 class(Noise) .float noise_paccum;
11 class(Noise) .float noise_paccum2;
12 class(Noise) .float noise_paccum3;
13 class(Noise) .float noise_bstate;
15 float Noise_Brown(entity e, float dt)
17 e.noise_baccum += random() * sqrt(dt); // same stddev for all dt
18 return e.noise_baccum;
20 float Noise_Pink(entity e, float dt)
24 // http://home.earthlink.net/~ltrammell/tech/pinkalg.htm
25 if(random() > pow(0.3190, f))
26 e.noise_paccum = 0.34848 * (2 * random() - 1);
27 if(random() > pow(0.7756, f))
28 e.noise_paccum2 = 0.28768 * (2 * random() - 1);
29 if(random() > pow(0.9613, f))
30 e.noise_paccum3 = 0.43488 * (2 * random() - 1);
31 return e.noise_paccum + e.noise_paccum2 + e.noise_paccum3;
33 float Noise_White(entity e, float dt)
35 return random() * 2 - 1;
37 float Noise_Burst(entity e, float dt, float p)
39 if(random() > pow(p, dt))
40 e.noise_bstate = !e.noise_bstate;
41 return 2 * e.noise_bstate - 1;