62 lines
1.8 KiB
Zig
62 lines
1.8 KiB
Zig
const std = @import("std");
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const mem = std.mem;
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const Allocator = mem.Allocator;
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const testing = std.testing;
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const Entities = @import("entities.zig").Entities;
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pub fn Adapter(all_components: anytype) type {
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return struct {
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world: *World(all_components),
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const Self = @This();
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pub const Iterator = Entities(all_components).Iterator;
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pub fn query(adapter: *Self, components: []const []const u8) Iterator {
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return adapter.world.entities.query(components);
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}
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};
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}
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pub fn World(all_components: anytype) type {
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return struct {
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allocator: Allocator,
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systems: std.StringArrayHashMapUnmanaged(System) = .{},
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entities: Entities(all_components),
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const Self = @This();
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pub const System = fn (adapter: *Adapter(all_components)) void;
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pub fn init(allocator: Allocator) !Self {
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return Self{
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.allocator = allocator,
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.entities = try Entities(all_components).init(allocator),
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};
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}
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pub fn deinit(world: *Self) void {
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world.systems.deinit(world.allocator);
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world.entities.deinit();
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}
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pub fn register(world: *Self, name: []const u8, system: System) !void {
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try world.systems.put(world.allocator, name, system);
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}
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pub fn unregister(world: *Self, name: []const u8) void {
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world.systems.orderedRemove(name);
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}
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pub fn tick(world: *Self) void {
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var i: usize = 0;
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while (i < world.systems.count()) : (i += 1) {
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const system = world.systems.entries.get(i).value;
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var adapter = Adapter(all_components){
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.world = world,
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};
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system(&adapter);
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}
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}
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};
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}
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