feat(m6a): add save speed and day-night controls

1 files changed, 35 insertions, 0 deletions

diff --git a/src/LivingVillage.Desktop/M6Presentation.fs b/src/LivingVillage.Desktop/M6Presentation.fs
new file mode 100644
index 0000000..410f20a
--- /dev/null
+++ b/src/LivingVillage.Desktop/M6Presentation.fs
@@ -0,0 +1,35 @@
+namespace LivingVillage.Desktop
+
+open Microsoft.Xna.Framework
+open LivingVillage.Kernel
+open LivingVillage.Kernel.Sim
+
+type M6DayNight =
+    | Day
+    | Night
+
+type M6RenderProfile =
+    { Mode: M6DayNight
+      Background: Color
+      WorldTint: Color }
+
+module M6Presentation =
+
+    let profileAtTick (tick: int64) : M6RenderProfile =
+        if Sim.isNightTick tick then
+            { Mode = Night
+              Background = Color(18, 25, 55)
+              WorldTint = Color(118, 136, 184) }
+        else
+            { Mode = Day
+              Background = Color(100, 160, 210)
+              WorldTint = Color.White }
+
+    let clockLabel (control: SimulationControl) : string =
+        if control.Paused then
+            "PAUSED"
+        else
+            match control.Speed with
+            | OneX -> "1X"
+            | TwoX -> "2X"
+            | FiveX -> "5X"