| + | Cannot set entity id + |
+
// Example flow of method call order:
// Setup systems:
-world.system([], systemA)
-world.system([], systemB)
+world.system(systemA)
+world.system(systemB)
// During world.run():
// systemA.pre()
// systemA.every() * number of entities
@@ -1104,11 +1104,11 @@
- system(components: Array, systemClass: Function, args: ...Object): number
+ system(args: ...Object): number
- source
+ source
@@ -1130,26 +1130,13 @@ Params:
- components
- Array
- The list of components the system will process in every(). This follows the same logic as entity.has() and world.every().
-
-
- systemClass
- Function
- The system class to instantiate. Can contain the following methods: constructor, initialize,
-pre, every, post. Pre() and post() get called before and after every(), for each of the independent systems. See world.run()
-for an example of the call order.
-
-
args
...Object
- - optional
The arguments to forward to the system's constructors
+ Both signatures are accepted: (components, systemClass, ...args) or (systemClass, ...args).
+[components]: The list of components the system will process in every(). This follows the same logic as entity.has() and world.every().
+{systemClass}: The system class to instantiate. Can contain the following methods: constructor, initialize, pre, every, post. Pre() and post() get called before and after every(), for each of the independent systems. See world.run() for an example of the call order.
+[...args]: The arguments to forward to the system's constructors.
@@ -1187,11 +1174,27 @@ Example:
// Movement system
world.system(['position', 'velocity'], class {
+ constructor(context) {
+ // This is showing how you can optionally pass parameters to the system's constructor
+ this.context = context
+ }
every(position, velocity, entity) {
position.x += velocity.x
position.y += velocity.y
}
- })
+ }, context)// System that doesn't use every()
+world.system(class {
+ constructor(context) {
+ this.context = context
+ }
+ pre() {
+ // Handle events or something
+ }
+ }, context)