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fixed normalDistrib, added randFloat(x) syntax

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This commit is contained in:
Darren Ranalli 2004-06-04 20:39:29 +00:00
parent 36cc87d9f5
commit aca80e6563
1 changed files with 5 additions and 3 deletions
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8
direct/src/showbase/PythonUtil.py
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@ -861,8 +861,10 @@ def weightedChoice(choiceList, rng=random.random, sum=None):
# Return the last item.
return item
def randFloat(a, b, rng=random.random):
"""returns a random float in [a,b]"""
def randFloat(a, b=0., rng=random.random):
"""returns a random float in [a,b]
call with single argument to generate random float between arg and zero
"""
return lerp(a,b,rng())
def normalDistrib(a, b, gauss=random.gauss):
@ -891,7 +893,7 @@ def normalDistrib(a, b, gauss=random.gauss):
In calculating our standard deviation, we divide (b-a) by 6, since the
99.7% figure includes 3 standard deviations _on_either_side_ of the mean.
"""
return min(a, max(b, gauss((a+b)*.5, (b-a)/6.)))
return max(a, min(b, gauss((a+b)*.5, (b-a)/6.)))
def randUint31(rng=random.random):
"""returns a random integer in [0..2^31).