]> git.scottworley.com Git - planeteer/commitdiff
Add a lot of code that isn't exercised yet.
authorScott Worley <sworley@chkno.net>
Tue, 25 Oct 2011 07:22:40 +0000 (00:22 -0700)
committerScott Worley <sworley@chkno.net>
Tue, 25 Oct 2011 07:22:40 +0000 (00:22 -0700)
planet-data
planeteer.go
planeteer_test.go [new file with mode: 0644]

index f9d119f5d77bb7ef390d6a7a80985baee8705be3..6c50a43e29468c6a9eb36fac586ea94027395f12 100644 (file)
@@ -91,9 +91,8 @@
                        "Limit": 0
                }
        },
-       "Planets": [
-               {
-                       "Name": "Earth",
+       "Planets": {
+               "Earth": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            100,
                                "Fighter Drones":             100
                        }
                },
-               {
-                       "Name": "Hothor",
+               "Hothor": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            176,
                                "Clothes Bundles":            290
                        }
                },
-               {
-                       "Name": "Volcana",
+               "Volcana": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Device Of Cloakings":        187,
                                "Clothes Bundles":            57
                        }
                },
-               {
-                       "Name": "Metallica",
+               "Metallica": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            67,
                                "Fighter Drones":             322
                        }
                },
-               {
-                       "Name": "Medoca",
+               "Medoca": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Medical Units":              23,
                                "Clothes Bundles":            54
                        }
                },
-               {
-                       "Name": "Gojuon",
+               "Gojuon": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Heating Units":              99,
                                "Clothes Bundles":            89
                        }
                },
-               {
-                       "Name": "Desha Rockna",
+               "Desha Rockna": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Medical Units":              134,
                                "Clothes Bundles":            87
                        }
                },
-               {
-                       "Name": "Dogafetch",
+               "Dogafetch": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            123,
                                "Clothes Bundles":            23
                        }
                },
-               {
-                       "Name": "Eden",
+               "Eden": {
                        "BeaconOn": false,
                        "RelativePrices": {
                                "Medical Units":              100,
                                "Eden Warp Units":            100
                        }
                },
-               {
-                       "Name": "Richiana",
+               "Richiana": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Device Of Cloakings":        157,
                                "Clothes Bundles":            465
                        }
                },
-               {
-                       "Name": "Tribonia",
+               "Tribonia": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Medical Units":              187,
                                "Clothes Bundles":            898
                        }
                },
-               {
-                       "Name": "Dune",
+               "Dune": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            143,
                                "Jewels":                     88
                        }
                },
-               {
-                       "Name": "Plague",
+               "Plague": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Medical Units":              239,
                                "Clothes Bundles":            90
                        }
                },
-               {
-                       "Name": "Norhaven",
+               "Norhaven": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            100,
                                "Onboard Printing Kits":      100
                        }
                },
-               {
-                       "Name": "Loony",
+               "Loony": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            500,
                                "Clothes Bundles":            67
                        }
                },
-               {
-                       "Name": "WeaponWorld",
+               "WeaponWorld": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            100,
                                "Onboard Printing Kits":      100
                        }
                },
-               {
-                       "Name": "Zoolie",
+               "Zoolie": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Medical Units":              78,
                                "Clothes Bundles":            100
                        }
                },
-               {
-                       "Name": "Baboria",
+               "Baboria": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Medical Units":              100,
                                "Clothes Bundles":            345
                        }
                },
-               {
-                       "Name": "StockWorld",
+               "StockWorld": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Shield Batterys":            103,
                                "Clothes Bundles":            98
                        }
                },
-               {
-                       "Name": "HugeLind Mar",
+               "HugeLind Mar": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Device Of Cloakings":        123,
                                "Clothes Bundles":            1320
                        }
                },
-               {
-                       "Name": "Sickonia",
+               "Sickonia": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Medical Units":              1756,
                                "Clothes Bundles":            1302
                        }
                },
-               {
-                       "Name": "Schooloria",
+               "Schooloria": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Heating Units":              100,
                                "Jewels":                     134
                        }
                },
-               {
-                       "Name": "Uniland",
+               "Uniland": {
                        "BeaconOn": true,
                        "RelativePrices": {
                        }
                },
-               {
-                       "Name": "HomeWorld",
+               "HomeWorld": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Medical Units":              1783,
                                "Clothes Bundles":            123
                        }
                },
-               {
-                       "Name": "Dreamora",
+               "Dreamora": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Device Of Cloakings":        123,
                                "Fighter Drones":             101
                        }
                },
-               {
-                       "Name": "Nirvana",
+               "Nirvana": {
                        "BeaconOn": true,
                        "RelativePrices": {
                                "Device Of Cloakings":        67,
                                "Clothes Bundles":            68
                        }
                }
-       ]
+       }
 }
index bc47c3d0320aeecde0d612f3f331ef5fa46353b6..25c9e03c02ecbc180445b59757332bce9f29f60d 100644 (file)
 package main
 
 import "flag"
+import "fmt"
 import "json"
 import "os"
-import "fmt"
+import "strings"
+
+var start = flag.String("start", "",
+       "The planet to start at")
 
-var datafile = flag.String("planet_data_file", "planet-data",
+var end = flag.String("end", "",
+       "A comma-separated list of planets to end at")
+
+var planet_data_file = flag.String("planet_data_file", "planet-data",
        "The file to read planet data from")
 
+var fuel = flag.Int("fuel", 16,
+       "Reactor units; How many non-Eden jumps we can make " +
+       "(but remember that deviating from the flight plan " +
+       "costs two units of fuel per jump)")
+
+var start_edens = flag.Int("start_edens", 0,
+       "How many Eden Warp Units are you starting with?")
+
+var end_edens = flag.Int("end_edens", 0,
+       "How many Eden Warp Units would you like to keep (not use)?")
+
+var cloak = flag.Bool("cloak", false,
+       "Make sure to end with a Device of Cloaking")
+
+var drones = flag.Int("drones", 0,
+       "Buy this many Fighter Drones")
+
+var batteries = flag.Int("batteries", 0,
+       "Buy this many Shield Batterys")
+
+var visit_string = flag.String("visit", "",
+       "A comma-separated list of planets to make sure to visit")
+
+func visit() []string {
+       return strings.Split(*visit_string, ",")
+}
+
 type Commodity struct {
        BasePrice int
        CanSell   bool
        Limit     int
 }
 type Planet struct {
-       Name     string
        BeaconOn bool
        /* Use relative prices rather than absolute prices because you
           can get relative prices without traveling to each planet. */
@@ -39,11 +72,12 @@ type Planet struct {
 }
 type planet_data struct {
        Commodities map [string] Commodity
-       Planets []Planet
+       Planets map [string] Planet
+       pi, ci map [string] int  // Generated; not read from file
 }
 
 func ReadData() (data planet_data) {
-       f, err := os.Open(*datafile)
+       f, err := os.Open(*planet_data_file)
        if err != nil {
                panic(err)
        }
@@ -55,10 +89,105 @@ func ReadData() (data planet_data) {
        return
 }
 
+/* This program operates by filling in a state table representing the best
+ * possible trips you could make; the ones that makes you the most money.
+ * This is feasible because we don't look at all the possible trips.
+ * We define a list of things that are germane to this game and then only
+ * consider the best outcome in each possible game state.
+ *
+ * Each cell in the table represents a state in the game.  In each cell,
+ * we track two things: 1. the most money you could possibly have while in
+ * that state and 2. one possible way to get into that state with that
+ * amount of money.
+ *
+ * A basic analysis can be done with a two-dimensional table: location and
+ * fuel.  planeteer-1.0 used this two-dimensional table.  This version
+ * adds features mostly by adding dimensions to this table.
+ *
+ * Note that the sizes of each dimension are data driven.  Many dimensions
+ * collapse to one possible value (ie, disappear) if the corresponding
+ * feature is not enabled.
+ */
+
+// The official list of dimensions:
+const (
+       // Name          Num  Size  Description
+       Edens = iota  //   1     3  # of Eden warp units (0 - 2 typically)
+       Cloaks        //   2     2  # of Devices of Cloaking (0 or 1)
+       UnusedCargo   //   3     4  # of unused cargo spaces (0 - 3 typically)
+       Fuel          //   4    17  Reactor power left (0 - 16)
+       Location      //   5    26  Location (which planet)
+       Hold          //   6    15  Cargo bay contents (a *Commodity or nil)
+       NeedFighters  //   7     2  Errand: Buy fighter drones (needed or not)
+       NeedShields   //   8     2  Errand: Buy shield batteries (needed or not)
+       Visit         //   9  2**N  Visit: Stop by these N planets in the route
+
+       NumDimensions
+)
+
+func bint(b bool) int {
+       if b { return 1 }
+       return 0
+}
+
+func DimensionSizes(data planet_data) []int {
+       eden_capacity := data.Commodities["Eden Warp Units"].Limit
+       cloak_capacity := bint(*cloak)
+       dims := []int{
+               eden_capacity + 1,
+               cloak_capacity + 1,
+               eden_capacity + cloak_capacity + 1,
+               *fuel + 1,
+               len(data.Planets),
+               len(data.Commodities),
+               bint(*drones > 0) + 1,
+               bint(*batteries > 0) + 1,
+               1 << uint(len(visit())),
+       }
+       if len(dims) != NumDimensions {
+               panic("Dimensionality mismatch")
+       }
+       return dims
+}
+
+func StateTableSize(dims []int) int {
+       sum := 0
+       for _, size := range dims {
+               sum += size
+       }
+       return sum
+}
+
+type State struct {
+       funds, from int
+}
+
+func NewStateTable(dims []int) []State {
+       return make([]State, StateTableSize(dims))
+}
+
+func EncodeIndex(dims, addr []int) int {
+       index := addr[0]
+       for i := 1; i < len(dims); i++ {
+               index = index * dims[i] + addr[i]
+       }
+       return index
+}
+
+func DecodeIndex(dims []int, index int) []int {
+       addr := make([]int, len(dims))
+       for i := len(dims) - 1; i > 0; i-- {
+               addr[i] = index % dims[i]
+               index /= dims[i]
+       }
+       addr[0] = index
+       return addr
+}
+
 /* What is the value of hauling 'commodity' from 'from' to 'to'?
  * Take into account the available funds and the available cargo space. */
 func TradeValue(data planet_data,
-                from, to *Planet,
+                from, to Planet,
                 commodity string,
                 initial_funds, max_quantity int) int {
        if !data.Commodities[commodity].CanSell {
@@ -87,24 +216,25 @@ func TradeValue(data planet_data,
 }
 
 func FindBestTrades(data planet_data) [][]string {
+       // TODO: We can't cache this because this can change based on available funds.
        best := make([][]string, len(data.Planets))
-       for from_index, from_planet := range data.Planets {
-               best[from_index] = make([]string, len(data.Planets))
-               for to_index, to_planet := range data.Planets {
+       for from := range data.Planets {
+               best[data.pi[from]] = make([]string, len(data.Planets))
+               for to := range data.Planets {
                        best_gain := 0
-                       price_list := from_planet.RelativePrices
-                       if len(to_planet.RelativePrices) < len(from_planet.RelativePrices) {
-                               price_list = to_planet.RelativePrices
+                       price_list := data.Planets[from].RelativePrices
+                       if len(data.Planets[to].RelativePrices) < len(data.Planets[from].RelativePrices) {
+                               price_list = data.Planets[to].RelativePrices
                        }
                        for commodity := range price_list {
                                gain := TradeValue(data,
-                                                  &from_planet,
-                                                  &to_planet,
+                                                  data.Planets[from],
+                                                  data.Planets[to],
                                                   commodity,
                                                   10000000,
                                                   1)
                                if gain > best_gain {
-                                       best[from_index][to_index] = commodity
+                                       best[data.pi[from]][data.pi[to]] = commodity
                                        gain = best_gain
                                }
                        }
@@ -113,17 +243,43 @@ func FindBestTrades(data planet_data) [][]string {
        return best
 }
 
+// (Example of a use case for generics in Go)
+func IndexPlanets(m *map [string] Planet) map [string] int {
+       index := make(map [string] int, len(*m))
+       i := 0
+       for e := range *m {
+               index[e] = i
+               i++
+       }
+       return index
+}
+func IndexCommodities(m *map [string] Commodity) map [string] int {
+       index := make(map [string] int, len(*m))
+       i := 0
+       for e := range *m {
+               index[e] = i
+               i++
+       }
+       return index
+}
+
 func main() {
        flag.Parse()
        data := ReadData()
+       data.pi = IndexPlanets(&data.Planets)
+       data.ci = IndexCommodities(&data.Commodities)
+       dims := DimensionSizes(data)
+       table := NewStateTable(dims)
+       table[0] = State{ 1, 1 }
        best_trades := FindBestTrades(data)
-       for from_index, from_planet := range data.Planets {
-               for to_index, to_planet := range data.Planets {
+
+       for from := range data.Planets {
+               for to := range data.Planets {
                        best_trade := "(nothing)"
-                       if best_trades[from_index][to_index] != "" {
-                               best_trade = best_trades[from_index][to_index]
+                       if best_trades[data.pi[from]][data.pi[to]] != "" {
+                               best_trade = best_trades[data.pi[from]][data.pi[to]]
                        }
-                       fmt.Printf("%s to %s: %s\n", from_planet.Name, to_planet.Name, best_trade)
+                       fmt.Printf("%s to %s: %s\n", from, to, best_trade)
                }
        }
 }
diff --git a/planeteer_test.go b/planeteer_test.go
new file mode 100644 (file)
index 0000000..0cc7f65
--- /dev/null
@@ -0,0 +1,18 @@
+package main
+
+import "testing"
+
+func TestEncodeDecode(t *testing.T) {
+       dims := []int{3, 2, 4, 17, 26, 15, 1, 2, 1}
+       for i := 0; i < 318240; i++ {   // Product of dims
+               addr := DecodeIndex(dims, i)
+               for j := 0; j < len(dims); j++ {
+                       if addr[j] >= dims[j] {
+                               t.Fail()
+                       }
+               }
+               if EncodeIndex(dims, addr) != i {
+                       t.Fail()
+               }
+       }
+}