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added pivotScalar, rad90/180/270/360

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This commit is contained in:
Darren Ranalli 2007-01-29 23:17:08 +00:00
parent ee9ea70f77
commit 9449c113df
1 changed files with 20 additions and 1 deletions
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21
direct/src/showbase/PythonUtil.py
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@ -25,7 +25,7 @@ __all__ = ['enumerate', 'unique', 'indent', 'nonRepeatingRandomList',
'printNumberedTyped', 'DelayedCall', 'DelayedFunctor', 'printNumberedTyped', 'DelayedCall', 'DelayedFunctor',
'FrameDelayedCallback', 'ArgumentEater', 'ClassTree', 'getBase', 'FrameDelayedCallback', 'ArgumentEater', 'ClassTree', 'getBase',
'superFlattenShip','HotkeyBreaker','logMethodCalls','GoldenRatio', 'superFlattenShip','HotkeyBreaker','logMethodCalls','GoldenRatio',
'GoldenRectangle'] 'GoldenRectangle', 'pivotScalar', 'rad90', 'rad180', 'rad270', 'rad360']
import types import types
import string import string
@ -667,6 +667,11 @@ def replace(list, old, new, all=0):
list[i] = new list[i] = new
return numReplaced return numReplaced
rad90 = math.pi / 2.
rad180 = math.pi
rad270 = 1.5 * math.pi
rad360 = 2. * math.pi
def reduceAngle(deg): def reduceAngle(deg):
""" """
Reduces an angle (in degrees) to a value in [-180..180) Reduces an angle (in degrees) to a value in [-180..180)
@ -1742,6 +1747,16 @@ def clampScalar(value, a, b):
else: else:
return value return value
def pivotScalar(scalar, pivot):
# reflect scalar about pivot; see tests below
return pivot + (pivot - scalar)
if __debug__:
assert pivotScalar(1, 0) == -1
assert pivotScalar(-1, 0) == 1
assert pivotScalar(3, 5) == 7
assert pivotScalar(10, 1) == -8
def weightedChoice(choiceList, rng=random.random, sum=None): def weightedChoice(choiceList, rng=random.random, sum=None):
"""given a list of (weight, item) pairs, chooses an item based on the """given a list of (weight, item) pairs, chooses an item based on the
weights. rng must return 0..1. if you happen to have the sum of the weights. rng must return 0..1. if you happen to have the sum of the
@ -2665,3 +2680,7 @@ __builtin__.notNone = notNone
__builtin__.clampScalar = clampScalar __builtin__.clampScalar = clampScalar
__builtin__.makeList = makeList __builtin__.makeList = makeList
__builtin__.makeTuple = makeTuple __builtin__.makeTuple = makeTuple
__builtin__.rad90 = rad90
__builtin__.rad180 = rad180
__builtin__.rad270 = rad270
__builtin__.rad360 = rad360