[comp.windows.x] xfroot patch

ejk@ux1.cso.uiuc.edu (Ed Kubaitis) (09/28/89)

The attached patch fixes a problem introduced getting xfroot ready to post
to comp.sources.x last weekend. The problem caused the sign of user-supplied
fractal parameters to be randomly changed. 


*** xfroot.c.orig	Sat Sep 23 11:14:26 1989
--- xfroot.c	Mon Sep 25 08:12:48 1989
***************
*** 90,98
  
  hopset() {
     int r = Ranfseed; double pmax=1.0*W, logpmax=log(pmax);
!    A = (A) ? A : exp(Ranf()*logpmax); if (r&2) A = -A;
!    B = (B) ? B : exp(Ranf()*logpmax); if (r&4) B = -B;
!    C = (C) ? C : Ranf()*pmax;         if (r&8) C = -C;
     }
  
  

--- 90,98 -----
  
  hopset() {
     int r = Ranfseed; double pmax=1.0*W, logpmax=log(pmax);
!    if (!A) { A = exp(Ranf()*logpmax); if (r&2) A = -A; }
!    if (!B) { B = exp(Ranf()*logpmax); if (r&4) B = -B; }
!    if (!C) { C = Ranf()*pmax;         if (r&8) C = -C; }
     }