-"undefined"!=typeof require&&require("neon"),Class("Serpentity")({prototype:{systems:null,nodeCollections:null,entities:null,init:function(e){var t;e=e||{},this.systems=[],this.entities=[],this.nodeCollections={};for(t in e)e.hasOwnProperty(t)&&(this[t]=e[t])},addSystem:function(e,t){var i,s;return this.systems.indexOf(e)>=0?!1:(e.priority=t,s=!1,i=0,this.systems.some(function(t,n){return i=n,t.priority>=e.priority?(s=!0,!0):void 0}),s||(i+=1),this.systems.splice(i,0,e),e.added(this),!0)},removeSystem:function(e){var t;return t=this.systems.indexOf(e),t>=0?(this.systems[t].removed(this),this.systems.splice(t,1),!0):!1},addEntity:function(e){var t;if(this.entities.indexOf(e)>=0)return!1;this.entities.push(e);for(t in this.nodeCollections)this.nodeCollections.hasOwnProperty(t)&&this.nodeCollections[t].add(e);return!0},removeEntity:function(e){var t;if(t=this.entities.indexOf(e),t>=0){for(property in this.nodeCollections)this.nodeCollections.hasOwnProperty(property)&&this.nodeCollections[property].remove(e);return this.entities.splice(t,1),!0}return!1},getNodes:function(e){var t;return this.nodeCollections.hasOwnProperty(e)?this.nodeCollections[e].nodes:(t=new Serpentity.NodeCollection({type:e}),this.nodeCollections[e]=t,this.entities.forEach(function(e){t.add(e)}),t.nodes)},update:function(e){this.systems.forEach(function(t){t.update(e)})}}}),"undefined"!=typeof require&&(require("./component.js"),require("./entity.js"),require("./node.js"),require("./node_collection.js"),require("./system.js"));
-Class(Serpentity,"Entity")({prototype:{_components:null,_componentKeys:null,init:function(n){var t;this._componentKeys=[],this._components=[];for(t in n)n.hasOwnProperty(t)&&(this[t]=n[t])},add:function(n){return this._componentKeys.indexOf(n.constructor)>=0?!1:(this._componentKeys.push(n.constructor),this._components.push(n),!0)},hasComponent:function(n){return this._componentKeys.indexOf(n)>=0?!0:!1},getComponent:function(n){var t;return t=this._componentKeys.indexOf(n),t>=0?this._components[t]:void 0}}});
-Class(Serpentity,"Node")({matches:function(t){var s,r,n;n=this.types;for(s in this.types)if(this.types.hasOwnProperty(s)&&(r=!1,t.hasComponent(n[s])&&(r=!0),!r))return!1;return!0},prototype:{types:null,init:function(){var t;this.types={};for(t in this.constructor)this.constructor.hasOwnProperty(t)&&(this.types[t]=this.constructor[t])}}});
-Class(Serpentity,"NodeCollection")({prototype:{type:null,nodes:null,init:function(t){var n;t=t||{},this.nodes=[];for(n in t)t.hasOwnProperty(n)&&(this[n]=t[n])},add:function(t){var n,e,i;if(this.type.matches(t)&&!this._entityExists(t)){n=new this.type({}),n.entity=t,e=this.type.types;for(i in e)e.hasOwnProperty(i)&&(n[i]=t.getComponent(e[i]));return this.nodes.push(n),!0}return!1},remove:function(t){var n;return n=-1,this.nodes.forEach(function(e,i){e.entity===t&&(n=i)}),n>=0?(this.nodes.splice(n,1),!0):!1},_entityExists:function(t){var n;return n=!1,this.nodes.forEach(function(e){e.entity===t&&(n=!0)}),n}}});
-Class(Serpentity,"Component")({});
-Class(Serpentity,"System")({prototype:{added:function(){},removed:function(){},update:function(){}}});
\ No newline at end of file
+'use strict';
+
+/*
+Serpentity is a simple entity framework inspired by Ash.
+
+Usage:
+
+ let Serpentity = require('serpentity');
+
+## Instantiating an engine
+
+ let engine = Serpentity();
+
+Add entities or systems, systems are added with a priority (the smaller
+the number, the earlier it will be called):
+
+ engine.addEntity(entityFactory());
+ engine.addSystem(new GameSystem(), priority);
+
+Update all systems:
+
+ engine.update(dt);
+
+Remove entities or systems:
+
+ engine.removeEntity(entityReference);
+ engine.removeSystem(systemReference);
+
+## Creating Entities
+
+Entities are the basic object of Serpentity, and they do nothing.
+
+ let entity = new Serpentity.Entity();
+
+All the behavior is added through components
+
+## Creating Components
+
+Components define data that we can add to an entity. This data will
+eventually be consumed by "Systems"
+
+ let PositionComponent = class PositionComponent extends Serpentity.Component {
+ constructor (config) {
+ this.x = 0;
+ this.y = 0;
+
+ super(config);
+ }
+ };
+
+You can add components to entities by using the add method:
+
+ entity.addComponent(new PositionComponent());
+
+
+Systems can refer to entities by requesting nodes.
+
+## Working with Nodes
+
+Nodes are sets of components that you define, so your system can require
+entities that always follow the API defined in the node.
+
+ let MovementNode = class MovementNode extends Serpentity.Node;
+ MovementNode.position = PositionComponent;
+ MovementNode.motion = MotionComponent;
+
+You can then request an array of all the nodes representing entities
+that comply with that API
+
+ engine.getNodes(MovementNode);
+
+## Creating Systems
+
+Systems are called on every update, and they use components through nodes.
+
+ let TestSystem = class TestSystem extends Serpentity.System {
+ added (engine){
+ this.nodeList = engine.getNodes(MovementNode);
+ },
+ removed (engine){
+ this.nodeList = undefined;
+ }
+ update (dt){
+ let node;
+ for (node of this.nodeList) {
+ console.log(`Current position is: ${node.position.x},${node.position.y}`);
+ }
+ }
+ };
+
+## That's it
+
+Just run `engine.update(dt)` in your game loop :D
+
+*/
+let Serpentity = class Serpentity {
+
+ constructor (config) {
+ this.systems = [];
+ this.entities = [];
+ this._nodeCollections = [];
+ this._nodeCollectionKeys = [];
+
+ Object.assign(this, config || {});
+ }
+
+ /*
+ * Adds a system to the engine, so its update method will be called
+ * with the others. Triggers added hook.
+ *
+ * returns true if added succesfully, false if already added
+ */
+ addSystem (system, priority) {
+ let lastIndex, found;
+
+ if (this.systems.indexOf(system) >= 0) {
+ return false;
+ }
+
+ system.priority = priority;
+
+ found = false;
+ lastIndex = 0;
+
+ this.systems.some(function findPriority(existingSystem, i) {
+ lastIndex = i;
+ if (existingSystem.priority >= system.priority) {
+ found = true;
+ return true;
+ }
+ });
+
+ if (!found) {
+ lastIndex += 1;
+ }
+
+ this.systems.splice(lastIndex, 0, system);
+ system.added(this);
+ return true;
+ }
+
+ /*
+ * Removes a system from the engine, so its update method will no
+ * longer will be called. Triggers the removed hook.
+ *
+ * returns true if removed succesfully, false if already added
+ */
+ removeSystem (system) {
+ let position;
+
+ position = this.systems.indexOf(system);
+ if (position >= 0) {
+ this.systems[position].removed(this);
+ this.systems.splice(position, 1);
+ return true;
+ }
+
+ return false;
+ }
+
+ /*
+ * Adds an entity to the engine, adds to existing node collections
+ *
+ * returns true if added, false if already there
+ */
+ addEntity (entity) {
+ if (this.entities.indexOf(entity) >= 0) {
+ return false;
+ }
+ this.entities.push(entity);
+
+ this._nodeCollections.forEach(function (collection) {
+ collection.add(entity);
+ });
+
+ return true;
+ }
+
+ /*
+ * Removes entity from system, removing from all node collections
+ *
+ * returns true if removed, false if not present
+ */
+ removeEntity (entity) {
+ let position;
+
+ position = this.entities.indexOf(entity);
+ if (position >= 0) {
+ this._nodeCollections.forEach(function (collection) {
+ collection.remove(entity);
+ });
+
+ this.entities.splice(position, 1);
+ return true;
+ }
+
+ return false;
+ }
+
+ /*
+ * Given a Node Class, retrieves a list of all the nodes for each
+ * applicable entity.
+ */
+ getNodes (nodeType) {
+ let position, nodeCollection;
+
+ position = this._nodeCollectionKeys.indexOf(nodeType);
+
+ if (position >= 0) {
+ return this._nodeCollections[position].nodes;
+ }
+
+ nodeCollection = new Serpentity.NodeCollection({
+ type : nodeType
+ });
+
+ this._nodeCollectionKeys.push(nodeType);
+ this._nodeCollections.push(nodeCollection);
+
+ this.entities.forEach(function (entity) {
+ nodeCollection.add(entity);
+ });
+
+ return nodeCollection.nodes;
+ }
+
+ /*
+ * Calls update for every loaded system.
+ */
+ update (dt) {
+ this.systems.forEach(function (system) {
+ system.update(dt);
+ });
+ }
+};
+
+// Add namespaced objects.
+if (typeof module !== 'undefined' && this.module !== module) {
+ Serpentity.Component = require('./serpentity/component.js');
+ Serpentity.Entity = require('./serpentity/entity.js');
+ Serpentity.Node = require('./serpentity/node.js');
+ Serpentity.NodeCollection = require('./serpentity/node_collection.js');
+ Serpentity.System = require('./serpentity/system.js');
+
+ module.exports = Serpentity;
+} else {
+ window.Serpentity = Serpentity;
+}
+
+'use strict';
+
+/* global Serpentity */
+
+/*
+ * The entity gives the entity framework its name. It exists only
+ * to hold components.
+ */
+
+let Entity = class Entity {
+ constructor (config) {
+ this._componentKeys = [];
+ this._components = [];
+
+ Object.assign(this, config || {});
+ }
+
+ /*
+ * Adds a component to the entity.
+ *
+ * returns true if added, false if already present
+ */
+ addComponent (component) {
+ if (this._componentKeys.indexOf(component.constructor) >= 0) {
+ return false;
+ }
+ this._componentKeys.push(component.constructor);
+ this._components.push(component);
+ return true;
+ }
+
+ /*
+ * returns true if component is included, false otherwise
+ */
+ hasComponent (componentClass) {
+ if (this._componentKeys.indexOf(componentClass) >= 0) {
+ return true;
+ }
+ return false;
+ }
+
+ /*
+ * returns the component associated with that key
+ */
+ getComponent (componentClass) {
+ let position;
+ position = this._componentKeys.indexOf(componentClass);
+ if (position >= 0) {
+ return this._components[position];
+ }
+ }
+};
+
+if (typeof module !== 'undefined' && this.module !== module) {
+ module.exports = Entity;
+} else {
+ Serpentity.Entity = Entity;
+}
+
+'use strict';
+
+/* global Serpentity */
+
+/*
+ * A node describes a set of components in order to describe entities
+ * that include them.
+ */
+let Node = class Node {
+
+ /*
+ * Returns true if the given entity matches the defined protocol,
+ * false otherwise
+ */
+ static matches (entity) {
+ let property, types;
+
+ types = this.types;
+
+ for (property in types) {
+ if (types.hasOwnProperty(property)) {
+ let matched, type;
+
+ matched = false;
+ type = types[property];
+ if (entity.hasComponent(type)) {
+ matched = true;
+ }
+ if (!matched) {
+ return false;
+ }
+ }
+ }
+
+ return true;
+ }
+
+ constructor (config) {
+ this.types = {};
+
+ Object.assign(this, config || {});
+ }
+};
+
+if (typeof module !== 'undefined' && this.module !== module) {
+ module.exports = Node;
+} else {
+ Serpentity.Node = Node;
+}
+
+'use strict';
+
+/* global Serpentity */
+
+/*
+ * Node Collections contain nodes, in order to keep the lists of nodes
+ * that belong to each type.
+ *
+ * It has a type which is the class name of the node, and an array of
+ * instances of that class.
+ */
+
+let NodeCollection = class NodeCollection {
+
+ constructor (config) {
+ this.nodes = [];
+ this.type = null;
+
+ Object.assign(this, config || {});
+ }
+
+ /*
+ * Creates a node for an entity if it matches, and adds it to the
+ * node list.
+ *
+ * Returns true if added, false otherwise.
+ */
+ add (entity) {
+
+ if (this.type.matches(entity) && !this._entityExists(entity)) {
+ let node, types, property;
+
+ node = new this.type({});
+ node.entity = entity;
+ types = this.type.types;
+
+ for (property in types) {
+ if (types.hasOwnProperty(property)) {
+ node[property] = entity.getComponent(types[property]);
+ }
+ }
+
+ this.nodes.push(node);
+
+ return true;
+ }
+
+ return false;
+ }
+
+ /*
+ * Removes an entity by removing its related node from the list of nodes
+ *
+ * returns true if it was removed, false otherwise.
+ */
+ remove (entity) {
+ let found;
+
+ found = -1;
+ this.nodes.forEach(function (node, i) {
+ if (node.entity === entity) {
+ found = i;
+ }
+ });
+
+ if (found >= 0) {
+ this.nodes.splice(found, 1);
+ return true;
+ }
+
+ return false;
+ }
+
+ /*
+ * Checks whether we already have nodes for this entity.
+ */
+ _entityExists (entity) {
+ let found, node;
+
+ found = false;
+ for (node of this.nodes) {
+ if (node.entity === entity) {
+ found = true;
+ }
+ }
+
+ return found;
+ }
+};
+
+if (typeof module !== 'undefined' && this.module !== module) {
+ module.exports = NodeCollection;
+} else {
+ Serpentity.NodeCollection = NodeCollection;
+}
+
+'use strict';
+
+/* global Serpentity */
+
+/*
+ * Components store data. Nothing to say here really, just
+ * inherit and add a prototype, or don't even inherit, see?
+ * It's just an empty class, so what I'm trying to say is your
+ * components can be any class whatsoever.
+ */
+
+let Component = class Component {
+ constructor (config) {
+ Object.assign(this, config || {});
+ }
+};
+
+if (typeof module !== 'undefined' && this.module !== module) {
+ module.exports = Component;
+} else {
+ Serpentity.Component = Component;
+}
+
+'use strict';
+
+/* global Serpentity */
+
+/*
+ * Systems contain most of the logic, and work with nodes in order to
+ * act and change their values.
+ *
+ * You usually want to inherit from this class and override the
+ * three methods. They are shown here to document the interface.
+ */
+
+let System = class System {
+
+ /*
+ * This will be run when the system is added to the engine
+ */
+ added () {
+ // Override with added(engine)
+ // Receives an instance of the serpentity engine
+ }
+
+ /*
+ * This will be run when the system is removed from the engine
+ */
+ removed () {
+ // Override with removed(engine)
+ // Receives an instance of the serpentity engine
+ }
+
+ /*
+ * This will run every time the engine's update method is called
+ */
+ update () {
+ // Override with update(dt)
+ // Receives a delta of the time
+ }
+};
+
+if (typeof module !== 'undefined' && this.module !== module) {
+ module.exports = System;
+} else {
+ Serpentity.System = System;
+}
git.r.bdr.sh / rbdr / serpentity / blobdiff