Add examples catalog with subcommand dispatch

- Extract game engine from package main to engine/ library package
- Create examples/ package with registry, Entry type, and BuilderDeps
- Register default world as an example (moved from main())
- Add combat example: two teams of units facing each other
- Rewrite main.go as thin dispatch: go run . example [name]
- Update README with examples catalog one-liner

1 files changed, 0 insertions, 46 deletions

diff --git a/patrol_order.go b/patrol_order.go
deleted file mode 100644
index e921e5b..0000000
--- a/patrol_order.go
+++ /dev/null
@@ -1,46 +0,0 @@
-package main
-
-import (
-	"age_of_empires/ecs"
-	"age_of_empires/physics"
-
-	"golang.org/x/exp/slog"
-)
-
-type PatrolOrder struct {
-	origin      physics.Point
-	destination physics.Point
-}
-
-func UpdatePatrolSystem(moveMap physics.MoveMap, masks []ecs.Mask, orders []OrderKind, patrols []PatrolOrder, positions []physics.Point, moves []physics.Move) {
-	required := ecs.CM_Position | ecs.CM_Move | ecs.CM_Order | ecs.CM_PatrolOrder
-	for i, mask := range masks {
-		if mask&required == required {
-			order := orders[i]
-			patrol := patrols[i]
-			position := positions[i]
-			move := &moves[i]
-			if order == OrderKindPatrol && !move.IsActive {
-				if position == patrol.destination {
-					*move = physics.NewMove(position, patrol.origin, moveMap)
-				} else {
-					*move = physics.NewMove(position, patrol.destination, moveMap)
-				}
-			}
-		}
-	}
-}
-
-func StartPatrolSystem(destination physics.Point, masks []ecs.Mask, positions []physics.Point, moves []physics.Move, orders []OrderKind, patrols []PatrolOrder) {
-	required := ecs.CM_Position | ecs.CM_Order | ecs.CM_PatrolOrder
-	for i, mask := range masks {
-		if mask&required == required {
-			position := positions[i]
-			order := &orders[i]
-			patrol := &patrols[i]
-			slog.Info("patrolling between", slog.String("origin", position.String()), slog.String("destination", destination.String()))
-			*patrol = PatrolOrder{origin: position, destination: destination}
-			*order = OrderKindPatrol
-		}
-	}
-}