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solarsystemInterferenceState.py (6308B)

      1 #Embedded file name: C:\BuildAgent\work\20d73f1b24eed06e\eve\release\V24.01\packages\solarsysteminterference\solarsystemInterferenceState.py
      2 from carbon.common.lib.const import SEC
      3 from solarsysteminterference.const import INTERFERENCE_BAND_NONE, INTERFERENCE_BAND_LOW, INTERFERENCE_BAND_MEDIUM, INTERFERENCE_BAND_HIGH, INTERFERENCE_BAND_HIGH_THRESHOLD, INTERFERENCE_BAND_MEDIUM_THRESHOLD
      4 
      5 class SolarsystemInterferenceState(object):
      6 
      7     def __init__(self, interferenceLevel, lastDecayTickTimestamp, interferenceDecreasePerDecayTick, decayTickPeriod, maxInterferenceLevel, quiescentInterferenceLevel):
      8         if interferenceDecreasePerDecayTick <= 0:
      9             raise ValueError('interferenceDecreasePerDecayTick must be greater than 0')
     10         if decayTickPeriod <= 0:
     11             raise ValueError('decayTickPeriod must be greater than 0')
     12         if maxInterferenceLevel <= quiescentInterferenceLevel:
     13             raise ValueError('maxInterferenceLevel must be greater than quiescentInterferenceLevel')
     14         if interferenceLevel > maxInterferenceLevel:
     15             raise ValueError('interferenceLevel (%.2f) must be less than or equal to maxInterferenceLevel (%.2f)' % (interferenceLevel, maxInterferenceLevel))
     16         if interferenceLevel < quiescentInterferenceLevel:
     17             raise ValueError('interferenceLevel (%.2f) must be greater than or equal to quiescentInterferenceLevel (%.2f)' % (interferenceLevel, quiescentInterferenceLevel))
     18         self._interferenceLevel = interferenceLevel
     19         self._lastDecayTickTimestamp = lastDecayTickTimestamp
     20         self._interferenceDecreasePerDecayTick = interferenceDecreasePerDecayTick
     21         self._decayTickPeriod = decayTickPeriod
     22         self._maxInterferenceLevel = maxInterferenceLevel
     23         self._quiescentInterferenceLevel = quiescentInterferenceLevel
     24 
     25     def __repr__(self):
     26         return 'SolarsystemInterferenceState(interferenceLevel=%r, lastDecayTickTimestamp=%r, interferenceDecreasePerDecayTick=%r, decayTickPeriod=%r, maxInterferenceLevel=%r, quiescentInterferenceLevel=%r)' % (self._interferenceLevel,
     27          self._lastDecayTickTimestamp,
     28          self._interferenceDecreasePerDecayTick,
     29          self._decayTickPeriod,
     30          self._maxInterferenceLevel,
     31          self._quiescentInterferenceLevel)
     32 
     33     def __eq__(self, other):
     34         if other is None:
     35             return False
     36         return self._interferenceLevel == other._interferenceLevel and self._lastDecayTickTimestamp == other._lastDecayTickTimestamp and self._interferenceDecreasePerDecayTick == other._interferenceDecreasePerDecayTick and self._decayTickPeriod == other._decayTickPeriod and self._maxInterferenceLevel == other._maxInterferenceLevel and self._quiescentInterferenceLevel == other._quiescentInterferenceLevel
     37 
     38     @property
     39     def interferenceLevel(self):
     40         return self._interferenceLevel
     41 
     42     @property
     43     def lastDecayTickTimestamp(self):
     44         return self._lastDecayTickTimestamp
     45 
     46     @property
     47     def interferenceDecreasePerDecayTick(self):
     48         return self._interferenceDecreasePerDecayTick
     49 
     50     @property
     51     def decayTickPeriod(self):
     52         return self._decayTickPeriod
     53 
     54     @property
     55     def maxInterferenceLevel(self):
     56         return self._maxInterferenceLevel
     57 
     58     @property
     59     def quiescentInterferenceLevel(self):
     60         return self._quiescentInterferenceLevel
     61 
     62     @property
     63     def isAtQuiescentLevel(self):
     64         return self._interferenceLevel <= self._quiescentInterferenceLevel
     65 
     66     @property
     67     def interferenceRange(self):
     68         return self._maxInterferenceLevel - self._quiescentInterferenceLevel
     69 
     70     @property
     71     def normalisedInterferenceLevel(self):
     72         return (self._interferenceLevel - self._quiescentInterferenceLevel) / self.interferenceRange
     73 
     74     @property
     75     def interferenceBand(self):
     76         if self.isAtQuiescentLevel:
     77             return INTERFERENCE_BAND_NONE
     78         normalisedInterferenceLevel = self.normalisedInterferenceLevel
     79         if normalisedInterferenceLevel > INTERFERENCE_BAND_HIGH_THRESHOLD:
     80             return INTERFERENCE_BAND_HIGH
     81         if normalisedInterferenceLevel > INTERFERENCE_BAND_MEDIUM_THRESHOLD:
     82             return INTERFERENCE_BAND_MEDIUM
     83         return INTERFERENCE_BAND_LOW
     84 
     85     def CanAffordCost(self, solarsystemInterferenceCost):
     86         return self._interferenceLevel + solarsystemInterferenceCost <= self._maxInterferenceLevel
     87 
     88 
     89 def _GetDecayResult(state, timestamp):
     90     timeDelta = timestamp - state.lastDecayTickTimestamp
     91     if timeDelta < 0:
     92         raise ValueError('_GetDecayResult cannot be calculated for negative timeDelta')
     93     numDecayTicks = timeDelta / (state.decayTickPeriod * SEC)
     94     interferenceDecrease = numDecayTicks * state.interferenceDecreasePerDecayTick
     95     newInterferenceLevel = max(state.quiescentInterferenceLevel, state.interferenceLevel - interferenceDecrease)
     96     newDecayTickTimestamp = state.lastDecayTickTimestamp + numDecayTicks * state.decayTickPeriod * SEC
     97     return (newInterferenceLevel, newDecayTickTimestamp)
     98 
     99 
    100 def GetNewState(originalState, newInterferenceLevel, newDecayTickTimestamp):
    101     return SolarsystemInterferenceState(newInterferenceLevel, newDecayTickTimestamp, originalState.interferenceDecreasePerDecayTick, originalState.decayTickPeriod, originalState.maxInterferenceLevel, originalState.quiescentInterferenceLevel)
    102 
    103 
    104 def CalculateStateAtTime(state, timestamp):
    105     if state.isAtQuiescentLevel:
    106         return state
    107     if timestamp < state.lastDecayTickTimestamp:
    108         return state
    109     newInterferenceLevel, newDecayTickTimestamp = _GetDecayResult(state, timestamp)
    110     return GetNewState(state, newInterferenceLevel, newDecayTickTimestamp)
    111 
    112 
    113 def CalculateStateAfterAddingInterferenceAtTime(state, interferenceIncrease, timestamp):
    114     if interferenceIncrease <= 0.0:
    115         raise ValueError('interferenceIncrease must be greater-than 0')
    116     newInterferenceLevel, newDecayTickTimestamp = _GetDecayResult(state, timestamp)
    117     stateAtTime = GetNewState(state, newInterferenceLevel, newDecayTickTimestamp)
    118     if not stateAtTime.CanAffordCost(interferenceIncrease):
    119         raise ExcessInterferenceError('Too much interference')
    120     return GetNewState(state, newInterferenceLevel + interferenceIncrease, newDecayTickTimestamp)
    121 
    122 
    123 class ExcessInterferenceError(Exception):
    124     pass