From c1fed8c508dd89c86de7dd647de0d014c441344e Mon Sep 17 00:00:00 2001 From: Vito Caputo Date: Sat, 21 May 2022 23:27:02 -0700 Subject: modules/*: first stab at utilizing supplied seeds This is a mostly mechanical change of using rand_r() in place of rand(), using the provided seed as the seed state. There's some outstanding rand()s outside of create_context() which should probably get switched over, with the seed being stowed in the context struct. I didn't bother going deeper on this at the moment in the interests of getting to sleep soon. --- src/modules/spiro/spiro.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/modules/spiro') diff --git a/src/modules/spiro/spiro.c b/src/modules/spiro/spiro.c index 07d9fbf..a2adb7b 100644 --- a/src/modules/spiro/spiro.c +++ b/src/modules/spiro/spiro.c @@ -38,12 +38,12 @@ static void * spiro_create_context(unsigned seed, unsigned ticks, unsigned n_cpu if (!ctxt) return NULL; - ctxt->r=.25f+(rand()/(float)RAND_MAX)*.5f; + ctxt->r=.25f+(rand_r(&seed)/(float)RAND_MAX)*.5f; if(ctxt->r>.5f) ctxt->r_dir=-1; else ctxt->r_dir=1; - ctxt->p=(rand()/(float)RAND_MAX)*ctxt->r; + ctxt->p=(rand_r(&seed)/(float)RAND_MAX)*ctxt->r; ctxt->p_dir=ctxt->r_dir*-1; #ifdef DEBUG printf("spiro: initial context: r=%f, dir=%i, p=%f, dir=%i\n", ctxt->r, ctxt->r_dir, ctxt->p, ctxt->p_dir); -- cgit v1.2.1