From b9d887fc3cd3ae26c678bf35bc90c4f1d6b03888 Mon Sep 17 00:00:00 2001 From: Lars-Dominik Braun Date: Fri, 13 Feb 2015 16:18:10 +0100 Subject: Unify prng use MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Finally drop all isaac references, do not use system rng any more. Drop rng state from flam3_frame – it was not used anyway. --- random.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 random.h (limited to 'random.h') diff --git a/random.h b/random.h new file mode 100644 index 0000000..4e0b8c9 --- /dev/null +++ b/random.h @@ -0,0 +1,20 @@ +#pragma once + +#include + +#define XORSHIFT_S 16 + +typedef struct { + uint64_t s[XORSHIFT_S]; + int p; +} randctx; + +void rand_seed (randctx * const st); +uint64_t rand_u64 (randctx * const st); +double rand_d01 (randctx * const st); +double rand_d11 (randctx * const st); +int rand_bool (randctx * const st); + +#define rand_distrib(st,v) ((v)[rand_u64(st)%vlen(v)]) +#define rand_mod(st,max) (rand_u64(st)%(max)) + -- cgit v1.2.3