zflecs

Getting started

pubfnbuild(b:*std.Build)void {constexe=b.addExecutable(.{... });constzflecs=b.dependency("zflecs", .{});exe.root_module.addImport("zflecs",zflecs.module("root"));exe.linkLibrary(zflecs.artifact("flecs"));}

conststd=@import("std");constecs=@import("zflecs");constPosition=struct {x:f32,y:f32 };constVelocity=struct {x:f32,y:f32 };constEats=struct {};constApples=struct {};fnmove_system(positions: []Position,velocities: []constVelocity)void {for (positions,velocities)|*p,v| {p.x+=v.x;p.y+=v.y;    }}//Optionally, systems can receive the components iterator (usually not necessary)fnmove_system_with_it(it:*ecs.iter_t,positions: []Position,velocities: []constVelocity)void {consttype_str=ecs.table_str(it.world,it.table).?;std.debug.print("Move entities with [{s}]\n", .{type_str});deferecs.os.free(type_str);for (positions,velocities)|*p,v| {p.x+=v.x;p.y+=v.y;    }}pubfnmain()!void {constworld=ecs.init();defer_=ecs.fini(world);ecs.COMPONENT(world,Position);ecs.COMPONENT(world,Velocity);ecs.TAG(world,Eats);ecs.TAG(world,Apples);_=ecs.ADD_SYSTEM(world,"move system",ecs.OnUpdate,move_system);_=ecs.ADD_SYSTEM(world,"move system with iterator",ecs.OnUpdate,move_system_with_it);constbob=ecs.new_entity(world,"Bob");_=ecs.set(world,bob,Position, .{ .x=0, .y=0 });_=ecs.set(world,bob,Velocity, .{ .x=1, .y=2 });ecs.add_pair(world,bob,ecs.id(Eats),ecs.id(Apples));_=ecs.progress(world,0);_=ecs.progress(world,0);constp=ecs.get(world,bob,Position).?;std.debug.print("Bob's position is ({d}, {d})\n", .{p.x,p.y });}

Move entities with [main.Position, main.Velocity, (Identifier,Name), (main.Eats,main.Apples)]Move entities with [main.Position, main.Velocity, (Identifier,Name), (main.Eats,main.Apples)]Bob's position is (4, 8)