bitecs - npm Package Compare versions

Comparing version 0.2.7 to 0.2.8

dist/index.es.js

@@ -1,2 +0,2 @@
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s[e][0]){const{index:o,type:a,length:l}=s[e][0];if(!l)throw new Error("❌ Must define a length for component array.");if(!t[a])throw new Error(`❌ Invalid component array property type ${a}.`);if(!t[o])throw new Error(`❌ Invalid component array index type ${o}.`);if(!n[o])throw new Error(`❌ Index type for component array must be unsigned (non-negative), instead was ${o}.`);if(!f[a]){const e=E.filter((e=>s[e][0].type===a)),n=e.reduce(((e,n)=>e+t[a].BYTES_PER_ELEMENT),0),c=e.reduce(((e,t)=>e+l),0),y=new SharedArrayBuffer((r=n*c*i,4*Math.ceil(r/4))),m=new t[a](y);m._indexType=o,m._indexBytes=t[o].BYTES_PER_ELEMENT,f[a]=m}c[e]={};let y=0;for(let t=0;t<i;t++){const n=m[a]+t*l,r=n+l;c[e][t]=f[a].subarray(n,r),y=r}m[a]=y,c[e]._reset=t=>c[e][t].fill(0),c[e]._set=(t,n)=>c[e][t].set(n,0)}else if("object"==typeof s[e])c[e]=o(i,s[e],!1);else if("string"==typeof s[e]){const n=s[e],r=i*t[n].BYTES_PER_ELEMENT,o=new SharedArrayBuffer(r);c[e]=new t[n](o)}else{if("function"!=typeof s[e])throw new 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n=o[e],{_generationId:i,_bitflag:s}=n;return(r[i][t]&s)===s};return{getGeneration:()=>a,registerComponent:(t,r)=>{if(Object.keys(o).length+1>e.maxComponentTypes)throw new Error(`❌ Can not register component '${t}'. Max components '${e.maxComponentTypes}' reached.`);return o[t]=n(e.maxEntities,r),a=o[t]._generationId,o[t]},addComponent:(e,t,n={},o=!0)=>{if(f(e,t))return;const s=c(e),{_generationId:a,_bitflag:l}=s;r[a][t]|=l,o&&s._reset(t),s._set(t,n);for(const e in i){const n=i[e];n.components.length&&n.checkComponent(s)&&n.check(t)&&n.add(t)}},removeComponent:l,removeAllComponents:e=>{Object.keys(o).forEach((t=>{l(t,e)}))},hasComponent:f,commitComponentRemovals:()=>{if(0!==s.length){for(let e=0;e<s.length;e+=2){const t=s[e],n=s[e+1],o=c(t),{_generationId:a,_bitflag:l}=o;if(!(r[a][n]&l))return;r[a][n]&=~l;for(const e in i){const t=i[e];t.components.length&&t.checkComponent(o)&&!t.check(n)&&t.remove(n)}}s.length=0}}}})(o,i,n),{enabled:g,registerSystem:h,toggle:b,step:A}=((e,t,n,r)=>{const{entities:o,components:i,systems:s}=t,a=[];let c=!0;const l=()=>{r(),n()};return{registerSystem:({name:t,components:n=[],enter:r,update:c,exit:f})=>{const y=[],E=new Int32Array(e.maxEntities).fill(-1),m={count:0,name:t,enabled:!0,components:n,localEntities:y,entityIndices:E,update:c,enter:r,exit:f},p=n.map((e=>{if(void 0===i[e])throw new Error(`❌ Cannot register system '${t}', '${e}' is not a registered component.`);return i[e]})),u=Array.from({length:e.maxGenerations},(()=>0));for(const e of p){const{_generationId:t,_bitflag:n}=e;u[t]|=n}m.masks=u,m.check=e=>{for(let t=0;t<u.length;t++){const n=o[t][e],r=u[t];if((n&r)!==r)return!1}return!0},m.checkComponent=e=>(u[e._generationId]&e._bitflag)===e._bitflag;const d=c?c(...p):null,_=r?r(...p):null,g=f?f(...p):null;m.execute=e=>{(e||m.enabled)&&d&&d(y),l()},m.add=e=>{-1===E[e]&&(E[e]=y.push(e)-1,m.count=y.length,_&&_(e))},m.remove=e=>{const t=E[e];if(-1===t)return;const n=y.pop();n!==e&&(y[t]=n,E[n]=t),E[e]=-1,m.count=y.length,g&&g(e)};for(let e=0;e<o[0].length;e++)m.components.length&&m.check(e)&&m.add(e);return s[t]=m,t.includes("query")||a.push(m),m},enabled:e=>e?s[e]?s[e].enabled:void console.warn(`System '${e}' is not registered.`):c,step:(e,t=!1)=>{if("boolean"==typeof e&&(t=e),"string"!=typeof e){if(t||c)for(let e=0;e<a.length;e++)a[e].execute();l()}else s[e].execute(t)},toggle:e=>{if(e)return s[e]?void(s[e].enabled=!s[e].enabled):void console.warn(`System '${e} is not registered.`);c=!c}}})(o,i,l,_),{save:w,load:v}=((e,t,n)=>({save:()=>{const r=n(),o=t(),i=Object.keys(e.components),s=i.map((t=>e.components[t])),a=Object.keys(e.systems),c=a.map((t=>e.systems[t])),l=Math.ceil(i.length/32),f=o*l*Uint32Array.BYTES_PER_ELEMENT,y=s.reduce(((e,t)=>e+t._flatten().reduce(((e,t)=>e+t.BYTES_PER_ELEMENT*o),0)),0),E=c.reduce(((e,t)=>e+t.localEntities.reduce(((e,t)=>e+Uint32Array.BYTES_PER_ELEMENT),0)+Uint32Array.BYTES_PER_ELEMENT),0),m=new ArrayBuffer(f+y+E),p=new DataView(m);let u=0;for(let t=0;t<o;t++)for(let n=0;n<l;n++){const r=e.entities[n];p.setUint32(u,r[t]),u+=Uint32Array.BYTES_PER_ELEMENT}return s.forEach((e=>{e._flatten().forEach((e=>{const t=e.constructor.name.split("Array")[0],n=e.BYTES_PER_ELEMENT,o=r;e._cursorStart=u;for(let r=0;r<o;r++)p["set"+t](u,e[r]),u+=n;e._cursorEnd=u}))})),a.forEach((t=>{const n=e.systems[t];p.setUint32(u,n.localEntities.length),u+=Uint32Array.BYTES_PER_ELEMENT,n.localEntities.forEach((e=>{p.setUint32(u,e),u+=Uint32Array.BYTES_PER_ELEMENT}))})),p.buffer.slice(0,u)},load:r=>{const o=n(),i=t(),s=Object.keys(e.components),a=s.map((t=>e.components[t])),c=Object.keys(e.systems),l=Math.ceil(s.length/32),f=new DataView(r);let y=0;for(let t=0;t<i;t++)for(let n=0;n<l;n++)e.entities[n][t]=f.getUint32(y),y+=Uint32Array.BYTES_PER_ELEMENT;a.forEach((e=>{e._flatten().forEach((e=>{const t=e.constructor.name.split("Array")[0],n=e.BYTES_PER_ELEMENT,r=o;for(let o=0;o<r;o++)e[o]=f["get"+t](y),y+=n}))})),c.forEach((t=>{const n=e.systems[t],r=f.getUint32(y);y+=Uint32Array.BYTES_PER_ELEMENT,n.localEntities.length=0,n.count=0,n.entityIndices.fill(-1);for(let e=0;e<r;e++){const e=f.getUint32(y);n.add(e),y+=Uint32Array.BYTES_PER_ELEMENT}}))}}))(i,s,f);let T=0;return{TYPES:e,config:o,registry:i,entityCount:s,addEntity:a,removeEntity:c,registerComponent:E,removeComponent:p,removeAllComponents:u,addComponent:m,hasComponent:d,registerSystem:h,createQuery:e=>h({name:"query-"+T++,components:e}).localEntities,enabled:g,toggle:b,step:A,save:w,load:v}};
+const e={bool:"bool",i8:Int8Array,ui8:Uint8Array,ui8c:Uint8ClampedArray,i16:Int16Array,ui16:Uint16Array,i32:Int32Array,ui32:Uint32Array,f32:Float32Array,f64:Float64Array},t=255,r=65535,n=(e,t)=>{const r=new e.constructor(new ArrayBuffer(e.buffer.byteLength+t*e.BYTES_PER_ELEMENT));return r.set(e.buffer),r},o=e=>4*Math.ceil(e/4),i={},a=Symbol("managerRef"),s=Symbol("managerSize"),f=Symbol("maps"),c=Symbol("subarrays"),y=Symbol("managerCursor"),u=Symbol("managerRemoved"),l=Symbol("shadow"),p=Symbol("entityMasks"),g=Symbol("entityEnabled"),d=Symbol("deferredEntityRemovals"),E=Symbol("removedEntities");let b=0;const m=e=>{const t=e[E],r=e[k],n=e[g];if(b>=r-r/5){const t=4*Math.ceil(r/2/4);e[x].forEach((e=>{e.manager._grow(t)})),e[k]+=t}const o=t.length>0?t.pop():b;return n[o]=1,b++,o},h=(e,t)=>e[d].push(t);function w(e){return function(){return e}}function _(e){return function(){return e}}const A=Symbol("queries"),S=Symbol("queryMap"),B=Symbol("queryComponents"),M=(e,t,r)=>{e[S].get(t)||P(e,t),e[S].get(t).enter=r},T=(e,t,r)=>{e[S].get(t)||P(e,t),e[S].get(t).exit=r},P=(e,t)=>{e[S].get(t)||e[S].set(t,{});let r=[],n=[],o=[];t[B].forEach((e=>{"function"==typeof e?("QueryNot"===e.name&&n.push(e()),"QueryChanged"===e.name&&(o.push(e()),r.push(e()))):r.push(e)}));const i=r.reduce(((e,t)=>t[s]>e?t[s]:e),0),a=new Uint32Array(i),f=new Uint8Array(i),c=r.map((t=>e[x].get(t).generationId)),y=(e,t)=>(e[t.generationId]||(e[t.generationId]=0),e[t.generationId]|=t.bitflag,e),u=r.map((t=>e[x].get(t))).reduce(y,{}),l=n.map((t=>e[x].get(t))).reduce(y,{});Object.assign(e[S].get(t),{entities:[],changed:[],enabled:f,components:r,notComponents:n,changedComponents:o,masks:u,notMasks:l,generations:c,indices:a}),e[A].add(t);for(let r=0;r<b;r++)e[g][r]&&v(e,t,r)&&R(e,t,r)},j=e=>{const t=function(e){e[S].has(t)||P(e,t);const r=e[S].get(t);return r.changedComponents.length?((e,t)=>{const 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dist/index.min.js

@@ -1,2 +0,2 @@
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e[r](f);c._indexType=index,c._indexBytes=e[index].BYTES_PER_ELEMENT,i[d][y][r]=c}i[d][t]={};let s=0;for(let e=0;e<g;e++){const o=b[r]+e*n,a=o+n;i[d][t][e]=i[d][y][r].subarray(o,a),s=a}b[r]=s,i[d][t]._reset=e=>i[d][t][e].fill(0),i[d][t]._set=(e,r)=>i[d][t][e].set(r,0)}else if("object"==typeof l[t])i[d][t]=Manager(g,l[t],!1);else if("string"==typeof l[t]){const r=l[t],n=g*e[r].BYTES_PER_ELEMENT,o=new ArrayBuffer(n),s=new ArrayBuffer(n);i[d][t]=new e[r](o),i[d][t][p]=new e[r](s)}else{if("function"!=typeof l[t])throw new Error("ECS Error: invalid property type "+l[t]);{const e=l[t],r=g*e.BYTES_PER_ELEMENT,n=new ArrayBuffer(r);i[d][t]=new e(n)}}}));let h;return Object.defineProperty(i[d],"_schema",{value:l}),Object.defineProperty(i[d],"_mapping",{value:e=>i[d][f][e]}),Object.defineProperty(i[d],"_reset",{value:e=>{for(const t of i[d]._props)ArrayBuffer.isView(i[d][t])?ArrayBuffer.isView(i[d][t][e])?i[d][t][e].fill(0):i[d][t][e]=0:i[d][t]._reset(e)}}),Object.defineProperty(i[d],"_set",{value:(e,t)=>{for(const r in t)i[d]._mapping(r)&&"string"==typeof t[r]?i[d].enum(r,e,t[r]):ArrayBuffer.isView(i[d][r])?i[d][r][e]=t[r]:Array.isArray(t[r])&&ArrayBuffer.isView(i[d][r][e])?i[d][r][e].set(t[r],0):"object"==typeof i[d][r]&&i[d][r]._set(e,t[r])}}),Object.defineProperty(i[d],"_get",{value:e=>{const t={};for(const r of i[d]._props)i[d]._mapping(r)?t[r]=i[d].enum(r,e):ArrayBuffer.isView(i[d][r])?t[r]=i[d][r][e]:"object"==typeof i[d][r]&&(ArrayBuffer.isView(i[d][r][e])?t[r]=Array.from(i[d][r][e]):t[r]=i[d][r]._get(e));return t}}),Object.defineProperty(i[d],"_props",{value:m}),Object.defineProperty(i[d],"_flatten",{value:(e=[])=>{if(h)return h;for(const t of i[d]._props)ArrayBuffer.isView(i[d][t])?e.push(i[d][t]):"object"==typeof i[d][t]&&i[d][t]._flatten(e);return h=e,e}}),Object.defineProperty(i[d],"enum",{value:(e,t,r)=>{const n=i[d]._mapping(e);if(n){if(!r)return n[i[d][e][t]];{const o=n.indexOf(r);if(-1===o)return void console.warn(`Value '${r}' is not part of enum.`);i[d][e][t]=o}}else console.warn("Property is not an enum.")}}),Object.defineProperty(i[d],"_grow",{value:e=>{i[d][a]+=e;for(const t of i[d]._props)ArrayBuffer.isView(i[d][t])?(i[d][t]=n(i[d][t],e),i[d][t][p]=n(i[d][t],e)):"object"==typeof i[d][t]&&(ArrayBuffer.isView(i[d][t][eid])||i[d][t]._grow())}}),i[d]})(l,g),exports.defineQuery=e=>{const t=function(e){e[h].has(t)||w(e,t);const r=e[h].get(t);return r.changedComponents.length?((e,t)=>{const r=e[h].get(t);return r.changed.length=0,r.changedComponents.forEach((e=>{const t=e._flatten();for(let e=0;e<t.length;e++){const n=t[e];for(let e=0;e<r.entities.length;e++){const t=r.entities[e];n[t]!==n[p][t]&&(r.changed.push(t),n[p][t]=n[t])}}})),r.changed})(e,t):r.entities};return t[_]=e,t},exports.defineSystem=(e,t)=>r=>{t(e(r)),(e=>{const t=e[T];for(let r=0;r<t.length;r+=2){const n=t[r],o=t[r+1],{generationId:i,bitflag:s}=e[M].get(n);if(!(e[l][i][o]&s))return;e[l][i][o]&=~s,e[b].forEach((t=>{const r=t[_];S(e,t,r)&&A(e,t,o)&&x(e,t,o)}))}t.length=0})(r),(e=>{const t=e[d],r=e[b],n=e[m],o=e[g];for(let i=0;i<t.length;i++){const s=t[i];if(0!==o[s]){r.forEach((e=>{x(e,s)})),n.push(s),o[s]=0;for(let t=0;t<e[l].length;t++)e[l][t][s]=0}}t.length=0})(r)},exports.enterQuery=(e,t,r)=>{e[h].get(t)||w(e,t),e[h].get(t).enter=r},exports.exitQuery=(e,t,r)=>{e[h].get(t)||w(e,t),e[h].get(t).exit=r},exports.pipe=e=>t=>{for(let r=0;r<e.length;r++){(0,e[r])(t)}},exports.registerComponent=v,exports.registerComponents=(e,t)=>{t.forEach((t=>v(e,t)))},exports.removeComponent=(e,t,r)=>e[T].push(t,r),exports.removeEntity=(e,t)=>e[d].push(t);
 //# sourceMappingURL=index.min.js.map

package.json

 {
   "name": "bitecs",
-  "version": "0.2.7",
+  "version": "0.2.8",
   "description": "Tiny, data-driven, high performance ECS library written in Javascript",
@@ -5,0 +5,0 @@ "license": "MPL-2.0",

README.md

 # 👾 bitECS 👾
 
-Tiny, data-driven, high performance [ECS](https://en.wikipedia.org/wiki/Entity_component_system) library written using JavaScript TypedArrays.
+Functional, tiny, data-oriented, high performance [ECS](https://en.wikipedia.org/wiki/Entity_component_system) library written using JavaScript TypedArrays.
 
 ## Features
+- Functional
 - `<3kb` gzipped
 - Zero dependencies
 - Node or Browser
-- [_Blazing fast_](https://github.com/noctjs/ecs-benchmark)
+- [_Killer performance_](https://github.com/noctjs/ecs-benchmark)
 
@@ -19,47 +20,74 @@ ## Install
 ```js
-import World from 'bitecs'
+import { 
+  createWorld,
+  registerComponent,
+  registerComponents,
+  defineComponent,
+  defineQuery,
+  enterQuery,
+  exitQuery,
+  defineSystem,
+  addComponent,
+  removeComponent,
+  addEntity,
+  removeEntity,
+  pipe,
+  Types,
+} from 'bitecs'
 
-// Create a world
-const world = World()
+// create a world
+const world = createWorld()
 
-// Register some components
-world.registerComponent('POSITION', { x: 'float32', y: 'float32' })
-world.registerComponent('VELOCITY', { vx: 'int8', vy: 'int8', speed: 'uint16' })
+// define component data stores
+const { f32 } = Types
+const Vector2 = { x: f32, y: f32 }
+const Position = defineComponent(Vector2)
+const Velocity = defineComponent(Vector2)
+const Health = defineComponent(f32)
+const Alive = defineComponent() // "tag" component
 
-// Register a system
-world.registerSystem({
-  name: 'MOVEMENT',
-  components: ['POSITION', 'VELOCITY'],
-  update: (POSITION, VELOCITY) => entities => {
-    for (let i = 0; i < entities.length; i++) {
-      const eid = entities[i]
-      POSITION.x[eid] += VELOCITY.vx[eid] * VELOCITY.speed[eid]
-      POSITION.y[eid] += VELOCITY.vy[eid] * VELOCITY.speed[eid]
-    }
+// register components on world
+registerComponents(world, [Position, Velocity, Health]) // in groups
+registerComponent(world, Alive) // or individually
+
+// define a query using components
+const movementQuery = defineQuery([Position, Velocity])
+
+// enter-query hook, called when an entity's components matches the query
+enterQuery(world, movementQuery, eid => {})
+
+// exit-query hook, called when an entity's components no longer matches the query
+exitQuery(world, movementQuery, eid => {})
+
+// define a system using the query
+const movementSystem = defineSystem(movementQuery, ents => {
+  for (let i = 0; i < ents.length; i++) {
+    const eid = ents[i];
+    Position.x[eid] += Velocity.x[eid]
+    Position.y[eid] += Velocity.y[eid]
   }
 })
 
-// Create a query
-const positions = world.createQuery(['POSITION']) // array will continuously update, no need to recreate
+// add an entity to the world
+const eid = addEntity(world)
 
-// Create an entity
-const eid = world.addEntity()
+// add components to the new entity in the world
+addComponent(world, Position, eid)
+addComponent(world, Velocity, eid)
 
-// Add components to entity
-world.addComponent('POSITION', eid, { x: 100, y: 100 })
-world.addComponent('VELOCITY', eid, { vx: 1, vy: -1, speed: 100 })
+// there are no component getters or setters
+// data is accessed directly by entity ID
+Velocity.x[eid] = 1
+Velocity.y[eid] = 2
 
-// Create an event loop and step world
-setInterval(() => {
-  world.step()
-}, 1000 / 30) // 30 tick on server
+const pipeline = pipe(
+  movementSystem,
+  movementSystem,
+  movementSystem,
+)
 
-// For browser, use frame rate
-const loop = () => {
-  world.step()
-  requestAnimationFrame(loop)
-}
-loop()
+movementSystem(world) // executes movement system on world
+pipeline(world) // executes a pipeline of systems on world
 ```
 
 Full documentation and feature rich examples can be found [here](DOCS.md).

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Improved metrics

Number of lines in readme file

93

increased by43.08%

Worsened metrics

Total package byte prevSize

131485

decreased by-21.65%

Lines of code

66

decreased by-10.81%

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