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graph=require('graph_customization')

function sysCall_init()
    graphHandle=sim.getObjectHandle(sim.handle_self)
    
    -- Create/update data streams/curves:
    sim.destroyGraphCurve(graphHandle,-1)
    stream1=sim.addGraphStream(graphHandle,'Object position X','m')
    objectHandle=sim.getObjectHandle('cube')
    graph.init()
    startMeasurement()
end

function startMeasurement()
    startTime=sim.getSystemTime()
    graph.reset()
    measure=true
end

function stopMeasurement()
    measure=nil
end

function appendMeasurementPts()
    if measure then
        -- append measurement points, e.g. the x-position of an object:
        local p=sim.getObjectPosition(objectHandle,-1)
        sim.setGraphStreamValue(graphHandle,stream1,p[1])
        
        graph.handle(sim.getSystemTime()-startTime)
        graph.updateCurves()
    end
end

function sysCall_sensing()
    appendMeasurementPts()
end

function sysCall_nonSimulation()
    appendMeasurementPts()
end

function sysCall_suspended()
    appendMeasurementPts()
end

function sysCall_beforeSimulation()
end

function sysCall_afterSimulation()
end

function sysCall_suspend()
end

function sysCall_resume()
end