working on the entity systemw

src/EntitySystem.zig

@@ -3,59 +3,127 @@ const Etyp = @import("EntitySystemTypes.zig");
 
 //Variables Entity
 
-const EntityIDs: std.TailQueue(u32) = init: {
-    var temp = std.TailQueue(u32);
-    var i = 0;
-    while (i < Etyp.MAXEntitys) {
-        temp.append(i);
-        i += 1;
-    }
-    break :init temp;
-};
+var EntityIDs: std.ArrayList(usize) = undefined;
 var EntityAmount: u32 = 0;
 
-const Signatures: [Etyp.MAXEntitys]Etyp.Signature = undefined;
+var Signatures: std.ArrayList(Etyp.Signature) = undefined;
 
 //Entity System
 
-pub fn CreateEntity() !Etyp.entity {
+fn CreateEntitysub() !Etyp.Entity {
     if (EntityAmount >= Etyp.MAXEntitys) {
-        return error{};
+        return error.GenericError;
     }
     EntityAmount += 1;
-    return EntityIDs.popFirst();
+    return EntityIDs.pop();
 }
 
-pub fn DestroyEntity(entity: Etyp.entity) void {
-    Signatures[entity] = null;
+fn DestroyEntitysub(entity: Etyp.Entity) void {
+    Signatures.items[entity] = null;
     EntityIDs.append(entity);
     EntityAmount -= 1;
 }
 
-pub fn SetSignature(entity: Etyp.entity, signature: Etyp.Signature) void {
-    Signatures[entity] = signature;
+fn SetSignature(entity: Etyp.Entity, signature: Etyp.Signature) void {
+    Signatures.items[entity] = signature;
 }
 
-pub fn GetSignature(entity: Etyp.entity) Etyp.signature {
-    return Signatures[entity];
+fn GetSignature(entity: Etyp.Entity) Etyp.Signature {
+    return Signatures.items[entity];
 }
 
 //Component Manager variables
 
-const ComponentTypeList: std.StringArrayHashMap(Etyp.Component) = std.StringArrayHashMap(Etyp.Component);
+var ComponentTypeList: std.StringArrayHashMap(Etyp.Component) = std.StringArrayHashMap(Etyp.Component).init(std.heap.page_allocator);
 
-const ComponentArrays: std.StringArrayHashMap(Etyp.ComponentArray) = std.StringArrayHashMap(Etyp.ComponentArray);
+var ComponentArrays = undefined;
+var String2CompArr: std.StringArrayHashMap(usize) = std.StringArrayHashMap(usize).init(std.heap.page_allocator);
 
 var NextComponent: Etyp.Component = 0;
 
 //component manager
 
-pub fn RegisterComponent(in: type) void {
+fn RegisterComponentsub(comptime in: anytype) !void {
     var name = @typeName(in);
-    ComponentTypeList.put(name, NextComponent);
-    ComponentArrays.put(name, ComponentArrays{});
+    try ComponentTypeList.put(name, NextComponent);
+    ComponentArrays = Etyp.ComponentArray(in).init();
+    try String2CompArr.put(name, ComponentArrays.len);
+}
+
+fn GetComponentArray(comptime in: type) type {
+    return ComponentArrays[@typeName(in)]();
+}
+fn GetComponentTypesub(comptime in: type) Etyp.Component{
+    return ComponentTypeList[@typeName(in)];
+}
+fn AddComponentsub(Entity: Etyp.Entity, comptime Component: type) void{
+    GetComponentArray(Component).AddComponent(Entity, Component);
+}
+fn RemoveComponentsub(Entity: Etyp.Entity, comptime in: anytype) void{
+    GetComponentArray(in).Removedata(Entity);
+}
+fn GetComponentsub(Entity: Etyp.Entity, comptime in: type) type{
+    return GetComponentArray(in).GetData(Entity);
+}
+fn EntityDestroyed(Entity: Etyp.Entity) void{
+    for(ComponentArrays.values())|val|{
+        val.EntityDestroyed(Entity);
+    } 
+}
+
+//THE MASTER
+pub fn Init() !void{
+    EntityIDs = init: {
+        var temp = try std.ArrayList(usize).initCapacity(std.heap.page_allocator, Etyp.MAXEntitys);
+        var i = Etyp.MAXEntitys;
+        while (i > 0) {
+            temp.appendAssumeCapacity(i);
+            i -= 1;
+        }
+        break :init temp;
+    };
+    Signatures = try std.ArrayList(Etyp.Signature).initCapacity(std.heap.page_allocator, Etyp.MAXEntitys);
+}
+pub fn CreateEntity() !Etyp.Entity{
+    return try CreateEntitysub();
+}
+
+pub fn DestroyEntity(Entity: Etyp.entity) void{
+    DestroyEntitysub(Entity);
+    EntityDestroyed(Entity);
+}
+
+pub fn RegisterComponent(comptime in: anytype) !void{
+    try RegisterComponentsub(in);
+}
+
+pub fn AddComponent(Entity: Etyp.Entity, comptime in: anytype) void{
+    AddComponentsub(Entity, in);
+    var sig = GetSignature(Entity);
+    sig.setValue(GetComponentTypesub(in), true);
+    SetSignature(Entity, sig);
 }
 
-fn GetComponentArray(in: type) Etyp.ComponentArray {
-    return ComponentArrays[@typeName(in)];
+pub fn RemoveComponent(Entity: Etyp.Entity, comptime in: anytype) void{
+    RemoveComponentsub(Entity, in);
+    var sig = GetSignature(Entity);
+    sig.setValue(GetComponentTypesub(in), false);
+    SetSignature(Entity, sig);
+}
+
+pub fn GetComponent(Entity: Etyp.Entity, comptime in: anytype) @TypeOf(in){
+    return GetComponentsub(Entity, in);
+}
+
+pub fn GetComponentType(comptime in: anytype) Etyp.Component{
+    return GetComponentTypesub(in);
+}
+pub fn GetEntitys(Signature: Etyp.Signature) []Etyp.Entity{
+    var sel = std.ArrayList(Etyp.Entity).init(std.heap.page_allocator);
+    for(Signatures.items, 0..)|val, i|{
+        if(val.intersectWith(Signature) == Signature){
+            try sel.append(i);
+        }
+    }
+    return sel.items;
 }

src/EntitySystemTypes.zig

@@ -16,35 +16,37 @@ pub const Signature = std.bit_set.IntegerBitSet(MAXComponents);
 
 //Component array type
 
-pub const ComponentArray = struct {
-    Components: [MAXEntitys]type,
-    Entity2Array: [usize]Entity,
-    Array2Entity: [Entity]usize,
+pub fn ComponentArray (comptime T: type) type {
+    return struct {
+        Components: [MAXEntitys]T,
+        Entity2Array: std.AutoArrayHashMap(Entity, usize),
+        Array2Entity: std.AutoArrayHashMap(usize, Entity),
         sizeM: usize,
+        const Self = @This();
 
-    pub fn AddComponent(self: ComponentArray, entity: Entity, comp: type) void {
-        var newidx: usize = self.sizeM;
-        self.Entity2Array[entity] = newidx;
-        self.Entity2Array[newidx] = entity;
-        self.Components[newidx] = comp;
-        self.sizeM += 1;
+        pub fn AddComponent(entity: Entity, comp: T) void {
+            var newidx: usize = Self.sizeM;
+            Self.Entity2Array[entity] = newidx;
+            Self.Entity2Array[newidx] = entity;
+            Self.Components[newidx] = comp;
+            Self.sizeM += 1;
         }
-    pub fn Removedata(self: ComponentArray, entity: Entity) void {
-        var remidx: usize = self.Entity2Array[entity];
-        var lastidx: usize = self.sizeM - 1;
-        self.Components[remidx] = self.Components[lastidx];
+        pub fn Removedata(entity: Entity) void {
+            var remidx: usize = Self.Entity2Array[entity];
+            var lastidx: usize = Self.sizeM - 1;
+            Self.Components[remidx] = Self.Components[lastidx];
 
-        var lastentity: entity = self.Array2Entity[lastidx];
-        self.Entity2Array[lastentity] = remidx;
-        self.Array2Entity[remidx] = lastentity;
+            var lastentity: entity = Self.Array2Entity[lastidx];
+            Self.Entity2Array[lastentity] = remidx;
+            Self.Array2Entity[remidx] = lastentity;
 
-        self.Entity2Array[entity] = null;
-        self.Array2Entity[lastentity] = null;
+            Self.Entity2Array[entity] = null;
+            Self.Array2Entity[lastentity] = null;
 
-        self.sizeM -= 1;
+            Self.sizeM -= 1;
         }
-    pub fn GetData(self: ComponentArray, entity: Entity) type {
-        return self.Components[self.Entity2Array[entity]];
+        pub fn GetData(entity: Entity) type {
+            return Self.Components[Self.Entity2Array[entity]];
         }
         pub fn EntityDestroyed(self: ComponentArray, entity: Entity) void {
             for(self.Array2Entity) |val|{
@@ -54,7 +56,16 @@ pub const ComponentArray = struct {
                 }
             }
         }
-};
+        pub fn init() Self{
+            return .{
+                .Components = undefined,
+                .Entity2Array = std.AutoArrayHashMap(Entity, usize).init(std.heap.page_allocator),
+                .Array2Entity = std.AutoArrayHashMap(usize, Entity).init(std.heap.page_allocator),
+                .sizeM = 0
+            };
+        }
+    };
+}
 
 
 //Components
@@ -62,5 +73,13 @@ pub const ComponentArray = struct {
 pub const Transform = struct {
     pos: rl.Vector2,
     rot: f16,
-    scale: rl.Vector2,
+};
+
+//Systems
+
+pub const Systems = struct {
+    const Self = @This();
+    pub fn Gravity() void{
+
+    }
 };

src/main.zig

@@ -1,6 +1,7 @@
 const rl = @import("raylib");
 const std = @import("std");
 const EnS = @import("EntitySystem.zig");
+const Etyp = @import("EntitySystemTypes.zig");
 
 pub fn main() anyerror!void {
     const screenWidth = 1280;
@@ -8,21 +9,34 @@ pub fn main() anyerror!void {
 
     rl.initWindow(screenWidth, screenHeight, "AHHHH");
     defer rl.closeWindow();
+    var alloc = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    var ptr = try alloc.allocator().create(Etyp.Transform);
+    ptr.* = Etyp.Transform{.pos = rl.Vector2.init(0, 0), .rot = 0};
 
     //rl.setTargetFPS(60);
+    try EnS.Init();
+    try EnS.RegisterComponent(Etyp.Transform);
+
+
+
+    var player = try EnS.CreateEntity();
+    
+    EnS.AddComponent(player, Etyp.Transform{.pos = rl.Vector2.init(0, 0), .rot = 0});
 
 
     while (!rl.windowShouldClose()) {
-        try update();
-        try draw();
-    }
-}
-pub fn update() !void{
-}
-pub fn draw() !void{
+        Etyp.Systems.Gravity();
+
+
+
         rl.beginDrawing();
         defer rl.endDrawing();
+        var pos = EnS.GetComponent(player, Etyp.Transform).pos;
+
+        rl.drawRectangle(pos.x, pos.y, 5, 5, rl.Color.gold);
     
         rl.clearBackground(rl.Color.black);
         rl.drawFPS(10, 10);
+    }
 }
+