godosa-engine: initial public history

1 files changed, 58 insertions, 0 deletions

diff --git a/src/Godosa.Core/Input/GamepadState.cs b/src/Godosa.Core/Input/GamepadState.cs
new file mode 100644
index 0000000..5f1d5a5
--- /dev/null
+++ b/src/Godosa.Core/Input/GamepadState.cs
@@ -0,0 +1,58 @@
+using System.Numerics;
+
+namespace Godosa.Core.Input;
+
+[Flags]
+public enum PadButtons
+{
+    None = 0,
+    A = 1 << 0,
+    B = 1 << 1,
+    X = 1 << 2,
+    Y = 1 << 3,
+    Back = 1 << 4,
+    Start = 1 << 5,
+    LeftShoulder = 1 << 6,
+    RightShoulder = 1 << 7,
+    DpadUp = 1 << 8,
+    DpadDown = 1 << 9,
+    DpadLeft = 1 << 10,
+    DpadRight = 1 << 11,
+}
+
+/// <summary>Raw held pad state, no game meaning: sticks −1…1 (SDL convention, stick up =
+/// −Y), triggers 0…1. Each game maps it to its own input frame.</summary>
+public readonly record struct GamepadState(Vector2 LeftStick, Vector2 RightStick, float LeftTrigger, float RightTrigger, PadButtons Buttons)
+{
+    public bool Held(PadButtons button) => (Buttons & button) != 0;
+}
+
+/// <summary>Input-script pad events (<c>PadA PadB PadX PadY PadBack PadStart PadUp PadDown
+/// PadLeft PadRight PadLB PadRB PadLT PadRT</c>, case-insensitive): triggers go full on/off.</summary>
+public static class GamepadScript
+{
+    public static GamepadState? Apply(GamepadState state, string name, bool down)
+    {
+        string key = name.ToLowerInvariant();
+        if (key == "padlt") return state with { LeftTrigger = down ? 1f : 0f };
+        if (key == "padrt") return state with { RightTrigger = down ? 1f : 0f };
+        PadButtons button = key switch
+        {
+            "pada" => PadButtons.A,
+            "padb" => PadButtons.B,
+            "padx" => PadButtons.X,
+            "pady" => PadButtons.Y,
+            "padback" => PadButtons.Back,
+            "padstart" => PadButtons.Start,
+            "padup" => PadButtons.DpadUp,
+            "paddown" => PadButtons.DpadDown,
+            "padleft" => PadButtons.DpadLeft,
+            "padright" => PadButtons.DpadRight,
+            "padlb" => PadButtons.LeftShoulder,
+            "padrb" => PadButtons.RightShoulder,
+            _ => PadButtons.None,
+        };
+        if (button == PadButtons.None) return null;
+        return state with { Buttons = down ? state.Buttons | button : state.Buttons & ~button };
+    }
+}