bitecs - npm Package Compare versions

Comparing version 0.2.18 to 0.2.19

package.json

 {
   "name": "bitecs",
-  "version": "0.2.18",
+  "version": "0.2.19",
   "description": "Tiny, data-driven, high performance ECS library written in Javascript",
@@ -38,4 +38,3 @@ "license": "MPL-2.0",
     "jsdoc-to-markdown": "^6.0.1",
-    "rollup": "^2.32.1",
-    "rollup-plugin-terser": "^7.0.2"
+    "rollup": "^2.32.1"
   },
@@ -42,0 +41,0 @@ "babel": {

README.md

 # 👾 bitECS 👾
 
-Functional, tiny, data-oriented, high performance [ECS](https://en.wikipedia.org/wiki/Entity_component_system) library written using JavaScript TypedArrays.
+Functional, small, data-oriented, high performance [ECS](https://en.wikipedia.org/wiki/Entity_component_system) library written using JavaScript TypedArrays.
 
@@ -77,8 +77,8 @@
 
-// returns an empty object which can be used to store miscellaneous state about the world
+// creating worlds returns empty objects
 const world = createWorld()
 const world2 = createWorld()
 
-// can store whatever you need on the world
-world.metadata = 123
+// store whatever you need on the world object
+world.time = { delta: 0, elapsed: 0 }
 
@@ -117,2 +117,6 @@ /**
 
+// wrapping a component with the Not modifier creates a query which
+// returns entities who explicitly do not have the component
+const positionWithoutVelocityQuery = defineQuery([ Position, Not(Velocity) ])
+
 // wrapping a component with the Change modifier creates a query which
@@ -122,6 +126,2 @@ // returns entities whose component's state has changed since last call of the function
 
-// wrapping a component with the Not modifier creates a query which
-// returns entities who explicitly do not have the component
-const notVelocityQuery = defineQuery([ Position, Not(Velocity) ])
-
 // enter-query hook, called when an entity's components matches the query
@@ -141,3 +141,3 @@ enterQuery(world, movementQuery, eid => {})
 
-// define a system
+// movement system
 const movementSystem = defineSystem(world => {
@@ -152,3 +152,13 @@ const ents = movementQuery(world)
 
+// delta time system
+let then = performance.now()
+const timeSystem = defineSystem(world => {
+  const now = performance.now()
+  const delta = now - then
+  world.time.delta = delta
+  world.time.elapsed += delta
+  then = now
+})
 
+
 /** 
@@ -189,4 +199,3 @@ * addEntity
   movementSystem,
-  movementSystem,
-  movementSystem,
+  timeSystem,
 )
@@ -199,6 +208,9 @@
 
-movementSystem(world) // executes movement system on world
-pipeline(world) // executes a pipeline of systems on world
+// execute movement system on world
+movementSystem(world)
 
+// executes a pipeline of systems on world
+pipeline(world)
 
+
 /** 
@@ -218,3 +230,3 @@ * createSerializer / Deserializer
 // deserializes the state back onto the world
-// note: creates entities/components if they do not exist
+// note: creates entities and adds components if they do not exist
 deserialize(world, packet)
@@ -221,0 +233,0 @@

No alert changes

Improved metrics

Total package byte prevSize

216211

increased by0.08%

Dev dependency count

7

decreased by-12.5%

Number of lines in readme file

245

increased by5.15%

No dependency changes