Update for meeting with Bosanac

julia/src/mission.jl

@@ -1,6 +1,7 @@
 export Phase, Mission_Guess, Mission, Bad_Mission
 export test_phase1, test_phase2
 export test_mg, test_mission
+export Vector
 
 struct Phase
   planet::Body
@@ -55,6 +56,51 @@ function Mission_Guess(sc::Sc, mass::Float64, date::DateTime, v∞::Vector{Float
   Mission_Guess(sc, mass, date, v∞, phases, false)
 end
 
+"""
+This is the opposite of the function below. It takes a vector and any other necessary information and outputs a mission guess
+"""
+function Mission_Guess(x::Vector{Float64}, sc::Sc, mass::Float64, flybys::Vector{Body})
+  # Variable mission params
+  launch_date = Dates.unix2datetime(x[1])
+  launch_v∞ = x[2:4]
+
+  # Try to intelligently determine n
+  three_n = ((length(x)-4)/length(flybys)) - 7
+  three_n % 3 == 0 || throw(Mission_Creation_Error(three_n))
+  n::Int = three_n/3
+
+  # Build the phases
+  i = 0
+  phases = Vector{Phase}()
+  for flyby in flybys
+    phase_params = x[ 5 + (3n+7) * i : 5 + (3n+7) * (i+1) - 1 ]
+    v∞_in = phase_params[1:3]
+    v∞_out = phase_params[4:6]
+    tof = phase_params[7]
+    thrusts = reshape(phase_params[8:end], (n,3))
+    push!(phases, Phase(flyby, v∞_in, v∞_out, tof, thrusts))
+    i += 1
+  end
+  return Mission_Guess(sc, mass, launch_date, launch_v∞, phases, false)
+end
+
+"""
+This is a function to convert a mission guess into an nlp-ready vector. It doesn't contain all
+information from the guess though.
+"""
+function Base.Vector(g::Mission_Guess)
+  result = Vector{Float64}()
+  push!(result, Dates.datetime2unix(g.launch_date))
+  push!(result, g.launch_v∞...)
+  for phase in g.phases
+    push!(result,phase.v∞_in...)
+    push!(result,phase.v∞_out...)
+    push!(result,phase.tof)
+    push!(result,phase.thrust_profile...)
+  end
+  return result
+end
+
 const test_mg = Mission_Guess(bepi, 12_000., DateTime(1992,11,19), [-3.4,1.2,0.1], test_phases)
             
 struct Mission