Add "starting cap" parameter to cap graph

graphs/data/fitCapacitor/getter.py

@@ -0,0 +1,95 @@
+# =============================================================================
+# Copyright (C) 2010 Diego Duclos
+#
+# This file is part of pyfa.
+#
+# pyfa is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# pyfa is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with pyfa.  If not, see <http://www.gnu.org/licenses/>.
+# =============================================================================
+
+
+import math
+
+from graphs.data.base import SmoothPointGetter
+
+
+class Time2CapAmountGetter(SmoothPointGetter):
+
+    def _getCommonData(self, miscParams, src, tgt):
+        return {
+            'maxCapAmount': src.item.ship.getModifiedItemAttr('capacitorCapacity'),
+            'capRegenTime': src.item.ship.getModifiedItemAttr('rechargeRate') / 1000}
+
+    def _calculatePoint(self, x, miscParams, src, tgt, commonData):
+        time = x
+        capAmount = calculateCapAmount(
+            maxCapAmount=commonData['maxCapAmount'],
+            capRegenTime=commonData['capRegenTime'],
+            capAmountT0=miscParams['capAmountT0'] or 0,
+            time=time)
+        return capAmount
+
+
+class Time2CapRegenGetter(SmoothPointGetter):
+
+    def _getCommonData(self, miscParams, src, tgt):
+        return {
+            'maxCapAmount': src.item.ship.getModifiedItemAttr('capacitorCapacity'),
+            'capRegenTime': src.item.ship.getModifiedItemAttr('rechargeRate') / 1000}
+
+    def _calculatePoint(self, x, miscParams, src, tgt, commonData):
+        time = x
+        capAmount = calculateCapAmount(
+            maxCapAmount=commonData['maxCapAmount'],
+            capRegenTime=commonData['capRegenTime'],
+            capAmountT0=miscParams['capAmountT0'] or 0,
+            time=time)
+        capRegen = calculateCapRegen(
+            maxCapAmount=commonData['maxCapAmount'],
+            capRegenTime=commonData['capRegenTime'],
+            currentCapAmount=capAmount)
+        return capRegen
+
+
+# Useless, but valid combination of x and y
+class CapAmount2CapAmountGetter(SmoothPointGetter):
+
+    def _calculatePoint(self, x, miscParams, src, tgt, commonData):
+        capAmount = x
+        return capAmount
+
+
+class CapAmount2CapRegenGetter(SmoothPointGetter):
+
+    def _getCommonData(self, miscParams, src, tgt):
+        return {
+            'maxCapAmount': src.item.ship.getModifiedItemAttr('capacitorCapacity'),
+            'capRegenTime': src.item.ship.getModifiedItemAttr('rechargeRate') / 1000}
+
+    def _calculatePoint(self, x, miscParams, src, tgt, commonData):
+        capAmount = x
+        capRegen = calculateCapRegen(
+            maxCapAmount=commonData['maxCapAmount'],
+            capRegenTime=commonData['capRegenTime'],
+            currentCapAmount=capAmount)
+        return capRegen
+
+
+def calculateCapAmount(maxCapAmount, capRegenTime, capAmountT0, time):
+    # https://wiki.eveuniversity.org/Capacitor#Capacitor_recharge_rate
+    return maxCapAmount * (1 + math.exp(5 * -time / capRegenTime) * (math.sqrt(capAmountT0 / maxCapAmount) - 1)) ** 2
+
+
+def calculateCapRegen(maxCapAmount, capRegenTime, currentCapAmount):
+    # https://wiki.eveuniversity.org/Capacitor#Capacitor_recharge_rate
+    return 10 * maxCapAmount / capRegenTime * (math.sqrt(currentCapAmount / maxCapAmount) - currentCapAmount / maxCapAmount)