Hi there:
Thanks for your comments:)
static t_int *noise_perform(t_int *w) { t_float *out = (t_float *)(w[1]); int *vp = (int *)(w[2]); int n = (int)(w[3]);
getting arguments ...
int val = *vp;setting seed
while (n--) {looping over the dsp block
*out++ = ((float)((val & 0x7fffffff) - 0x40000000)) * (float)(1.0 / 0x40000000);scaling the random number between -1 and 1
Ummmm, I don't quite understand this scaling code, especially with the long numbers. Is this like the fast way of doing scaling? Like doing bit shifting is fast multiplying?
val = val * 435898247 + 382842987;generating new random number
This is the bit that I really like to learn, you can get random number by adding two large numbers times the seed? Also how does the seeding method works?
static int init = 307; x->x_val = (init *= 1319);
} *vp = val;dont forget it
return (w+4);}
done ...
if you are interested in different noise generators most of the noise generators from supercollider (quite a log actually) are part of sc4pd ... an sc header file contains the inline functions for the rngs ...
Cool, I will look into that. I don't know of sc4pd, what is it? I did wonder why supercollider is in Pd's CVS. Does sc4pd allows you to do/script/run supercollider in Pd?
Many thanks again
CHUN