From 3a1f9fe6800ef5fe7bbf1c0a5976720383ba84fe Mon Sep 17 00:00:00 2001
From: Joel Stålnacke <joel@saker.fi>
Date: Mon, 23 Mar 2026 19:50:18 +0200
Subject: Rewrite native code in Odin and use ECS

---
 Djup.Native/src/LibDjup.cs | 74 +++++++++++++++++++++++++++-------------------
 1 file changed, 43 insertions(+), 31 deletions(-)

(limited to 'Djup.Native/src/LibDjup.cs')

diff --git a/Djup.Native/src/LibDjup.cs b/Djup.Native/src/LibDjup.cs
index 4cd99f8..864f330 100644
--- a/Djup.Native/src/LibDjup.cs
+++ b/Djup.Native/src/LibDjup.cs
@@ -5,50 +5,62 @@ namespace Djup.Native;
 public static partial class LibDjup
 {
     const string LibraryName = "djup";
-    const string Prefix = "dp_";
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(hello_world))]
-    public static partial void hello_world();
+    [LibraryImport(LibraryName, EntryPoint = nameof(vec2_dot))]
+    public static partial Vec2 vec2_dot(Vec2 a, Vec2 b);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(get_num))]
-    public static partial int get_num();
+    [LibraryImport(LibraryName, EntryPoint = nameof(vec2_length))]
+    public static partial float vec2_length(Vec2 v);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(get_vec2))]
-    public static partial Vec2 get_vec2();
+    [LibraryImport(LibraryName, EntryPoint = nameof(vec2_normal))]
+    public static partial Vec2 vec2_normal(Vec2 v);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(vec2_mul))]
-    public static partial Vec2 vec2_mul(Vec2 v, float scalar);
+    [LibraryImport(LibraryName, EntryPoint = nameof(sim_log_init))]
+    public static partial void sim_log_init(IntPtr simulation, [MarshalAs(UnmanagedType.FunctionPtr)] LoggerDelegate logger, [MarshalAs(UnmanagedType.FunctionPtr)] AssertDelegate assert);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(vec2_normal))]
-    public static partial Vec2 vec2_normal(Vec2 v);
+    [LibraryImport(LibraryName, EntryPoint = nameof(sim_set_log_level))]
+    public static partial void sim_set_log_level(IntPtr simulation, LogLevel minLevel);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(vec2_length))]
-    public static partial float vec2_length(Vec2 v);
+    [LibraryImport(LibraryName, EntryPoint = nameof(sim_create))]
+    public static partial IntPtr sim_create(int snapshots, int entities);
+
+    [LibraryImport(LibraryName, EntryPoint = nameof(sim_free))]
+    public static partial void sim_free(IntPtr simulation);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(log_set_output))]
-    public static partial void log_set_output([MarshalAs(UnmanagedType.FunctionPtr)] LoggerDelegate logger);
+    [LibraryImport(LibraryName, EntryPoint = nameof(sim_get_snapshot))]
+    public unsafe static partial Snapshot* sim_get_snapshot(IntPtr simulation);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(log_set_level))]
-    public static partial void log_set_level(LogLevel minLevel);
+    [LibraryImport(LibraryName, EntryPoint = nameof(sim_return_snapshot))]
+    public unsafe static partial void sim_return_snapshot(IntPtr simulation, Snapshot* snapshot);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(physics_context_create))]
-    public static partial IntPtr physics_context_create(int snapshots, int players, int balls);
+    [LibraryImport(LibraryName, EntryPoint = nameof(sim_tick))]
+    public unsafe static partial void sim_tick(Snapshot* current, Snapshot* next);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(physics_context_free))]
-    public static partial void physics_context_free(IntPtr context);
+    [LibraryImport(LibraryName, EntryPoint = nameof(snapshot_create_entity))]
+    public unsafe static partial EntityId snapshot_create_entity(Snapshot* snapshot);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(physics_context_get_snapshot))]
-    public static partial IntPtr physics_context_get_snapshot(IntPtr context);
+    public enum ComponentAddError
+    {
+        None,
+        InvalidArg,
+        InvalidId,
+        EntityNotFound
+    }
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(physics_context_return_snapshot))]
-    public static partial void physics_context_return_snapshot(IntPtr context, IntPtr snapshot);
+    [LibraryImport(LibraryName, EntryPoint = nameof(snapshot_add_component))]
+    public unsafe static partial ComponentAddError snapshot_add_component(Snapshot* snapshot, EntityId entity, Component component, void* init);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(physics_tick))]
-    public static partial int physics_tick(IntPtr currentSnapshot, double delta, IntPtr nextSnapshot);
+    public enum ComponentRemoveError
+    {
+        None,
+        InvalidArg,
+        InvalidId,
+        EntityNotFound
+    }
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(snapshot_put_player))]
-    public static unsafe partial int snapshot_put_player(IntPtr snapshot, int playerId, Player* player);
+    [LibraryImport(LibraryName, EntryPoint = nameof(snapshot_remove_components))]
+    public unsafe static partial ComponentRemoveError snapshot_remove_components(Snapshot* snapshot, EntityId entity, Components components);
 
-    [LibraryImport(LibraryName, EntryPoint = Prefix + nameof(snapshot_set_player_input))]
-    public static partial int snapshot_set_player_input(IntPtr snapshot, int playerId, byte input);
+    [LibraryImport(LibraryName, EntryPoint = nameof(snapshot_reset_entity))]
+    public unsafe static partial ComponentRemoveError snapshot_reset_entity(Snapshot* snapshot, EntityId entity);
 }
-- 
cgit v1.2.3