update class diagram & readme

2 files changed, 74 insertions, 37 deletions

diff --git a/docs/class-diag.puml b/docs/class-diag.puml
index f695ed3..30e4a71 100644
--- a/docs/class-diag.puml
+++ b/docs/class-diag.puml
@@ -210,6 +210,7 @@ rectangle Group_Pathfinding as "Pathfinding" <<group>> {
   PathfindingContext -> Pathfinder
 }
 rectangle Group_Model as "Model" <<group>> {
+  together {
 	class Museum {
 		+ people : People
 		+ canvas : Canvas
@@ -218,16 +219,31 @@ rectangle Group_Model as "Model" <<group>> {
 		--
 		+ paused : bool
 		+ update()
+    - tick_interval = 15ms <<constexpr>>
+    --
 		+ skip_forward()
 		+ skip_backward()
+    - jump : int
 		--
-		- jump : unsigned long
+    - snapshot_ticks = 50 <<constexpr>>
+    - history : stack<vec<Memento>>
+    - save_snapshot() : vec<Memento>
+    - restore_snapshot(const vec<Memento> &)
 		--
 		- working : bool
 		- worker : thread *
 		- work()
 	}
+	interface Memento {
+	}
+  }
 	together {
+  class CanvasDataMemento {
+    - data : CanvasData
+	}
+  class TileDataMemento {
+    - data : TileData
+	}
 	class Canvas {
 		+ Canvas(Museum &)
 		--
@@ -240,6 +256,9 @@ rectangle Group_Model as "Model" <<group>> {
 		--
     + tile_color : TileColorFactory
     + tile_behavior : TileBehaviorFactory
+    --
+    + save() : vec<Memento>
+    + restore(const vec<Memento> &)
 		--
 		- tiles : vector<Tile *>
 		- museum : Museum &
@@ -248,6 +267,11 @@ rectangle Group_Model as "Model" <<group>> {
 		+ rows : unsigned int
 		+ columns : unsigned int
 	}
+	}
+  together {
+  class ArtistDataMemento {
+    - data : ArtistData
+	}
 	class People {
 		+ People(Museum &)
 		+ update(tick : bool)
@@ -255,14 +279,29 @@ rectangle Group_Model as "Model" <<group>> {
 		+ add_artist(ArtistData)
 		+ remove_artist(Artist &)
 		+ get_artists() : forward_list<Artist *>
+    --
+    + save() : vec<Memento>
+    + restore(const vec<Memento> &)
 		--
 		- artists : forward_list<Artist *>
 		- artist_count : size_t
 		- museum : Museum &
 	}
-	interface Memento {
+	class Artist {
+		+ update(tick : bool)
+		+ step : bool
+		+ color : Color
+		+ data : ArtistData
+		--
+		- data : ArtistData
+		- museum : Museum &
+	}
+	struct ArtistData {
+		+ x : float
+		+ y : float
+		+ vx : float
+		+ vy : float
 	}
-	People -r[hidden] Canvas
 	}
 	together {
 	class Tile {
@@ -281,40 +320,25 @@ rectangle Group_Model as "Model" <<group>> {
 		+ y : unsigned int
 		+ type : string
 	}
-	class Artist {
-		+ update(tick : bool)
-		+ step : bool
-		+ color : Color
-		+ data : ArtistData
-		--
-		- data : ArtistData
-		- museum : Museum &
-	}
-	struct ArtistData {
-		+ x : float
-		+ y : float
-		+ vx : float
-		+ vy : float
 	}
+	together {
 	class TileColorFactory <<factory>> {
 		+ get_color(string) : Color <<static>>
 		+ register_color(string, Color) <<static>>
 	}
-	class TileBehaviorFactory <<factory>> {
-		+ TileBehaviorFactory(Museum &)
-		+ create(string) : uniq<TileBehavior>
-		--
-		- museum : Museum &
-	}
-	}
-
 	struct Color {
 		red : unsigned int
 		green : unsigned int
 		blue : unsigned int
 	}
-
+	}
 	together {
+	class TileBehaviorFactory <<factory>> {
+		+ TileBehaviorFactory(Museum &)
+		+ create(string) : uniq<TileBehavior>
+		--
+		- museum : Museum &
+	}
 	interface TileBehavior {
 		+ step(Artist *)
 		+ update(Tile &)
@@ -329,19 +353,19 @@ rectangle Group_Model as "Model" <<group>> {
     - type = "" <<constexpr>>
   }
   class StepTileBehavior {
-    - type = "G" : <<constexpr>>
+    - type = "G" <<constexpr>>
   }
   class DeleteArtistTileBehavior {
-    - type = "R" : <<constexpr>>
+    - type = "R" <<constexpr>>
   }
   class SetNeighborTileBehavior {
-    - type = "B" : <<constexpr>>
+    - type = "B" <<constexpr>>
     --
     - dx : int
     - dy : int
   }
   class CreateArtistTileBehavior {
-    - type = "Y" : <<constexpr>>
+    - type = "Y" <<constexpr>>
     --
     - last_interactions : unsigned int
   }
@@ -362,7 +386,7 @@ rectangle Group_Model as "Model" <<group>> {
   Canvas --> TileBehaviorFactory
 	People --> Artist
 
-	Tile   -> TileData
+	Tile   --> TileData
 	Artist -l> ArtistData
 	Canvas -> CanvasData
 
@@ -386,9 +410,13 @@ rectangle Group_Model as "Model" <<group>> {
 	Tile --> "state" TileBehavior
 	Tile .[norank].> TileBehaviorFactory
 
-	Memento <|.[norank]. TileData
-	Memento <|.[norank]. ArtistData
-	Memento <|.[norank]. CanvasData
+  Memento <|.. TileDataMemento
+  Memento <|.. ArtistDataMemento
+  Memento <|.. CanvasDataMemento
+  Museum -[norank]-> Memento
+  People -[norank]-> ArtistDataMemento
+  Canvas -[norank]-> CanvasDataMemento
+  Canvas -[norank]-> TileDataMemento
 
 	' LAYOUT
 	Artist -r[hidden] Tile
diff --git a/readme.md b/readme.md
index 42c9aaf..93cbf4a 100644
--- a/readme.md
+++ b/readme.md
@@ -1,5 +1,14 @@
-# TODO
+This is a standard CMake project. To build (using Ninja), run:
 
-- update class diagram
-- triple check class diagram
+```
+$ cmake -B build -G Ninja
+$ ninja -C build
+```
+
+This project uses the following third-party dependencies, which must be
+installed globally before building this project:
+
+- [SDL3](https://github.com/libsdl-org/SDL) 3.1.3
+- [cpr](https://github.com/libcpr/cpr) 1.11.0
+- [pugixml](https://github.com/zeux/pugixml) 1.14