51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
import math
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from eos.graph import SmoothGraph
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AU_METERS = 149597870700
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class FitWarpTimeVsDistanceGraph(SmoothGraph):
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def getYForX(self, fit, extraData, distance):
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if distance == 0:
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return 0
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maxSubwarpSpeed = fit.ship.getModifiedItemAttr('maxVelocity')
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maxWarpSpeed = fit.warpSpeed
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time = calculate_time_in_warp(maxWarpSpeed, maxSubwarpSpeed, distance * AU_METERS)
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return time
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def _getXLimits(self, fit, extraData):
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return 0, fit.maxWarpDistance
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# Taken from https://wiki.eveuniversity.org/Warp_time_calculation#Implementation
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# with minor modifications
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# Warp speed in AU/s, subwarp speed in m/s, distance in m
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def calculate_time_in_warp(max_warp_speed, max_subwarp_speed, warp_dist):
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k_accel = max_warp_speed
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k_decel = min(max_warp_speed / 3, 2)
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warp_dropout_speed = max_subwarp_speed / 2
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max_ms_warp_speed = max_warp_speed * AU_METERS
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accel_dist = AU_METERS
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decel_dist = max_ms_warp_speed / k_decel
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minimum_dist = accel_dist + decel_dist
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cruise_time = 0
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if minimum_dist > warp_dist:
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max_ms_warp_speed = warp_dist * k_accel * k_decel / (k_accel + k_decel)
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else:
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cruise_time = (warp_dist - minimum_dist) / max_ms_warp_speed
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accel_time = math.log(max_ms_warp_speed / k_accel) / k_accel
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decel_time = math.log(max_ms_warp_speed / warp_dropout_speed) / k_decel
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total_time = cruise_time + accel_time + decel_time
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return total_time
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