playcanvas
Version:
PlayCanvas WebGL game engine
228 lines (225 loc) • 7.29 kB
JavaScript
import { guid } from '../core/guid.js';
import { GraphNode } from '../scene/graph-node.js';
import { getApplication } from './globals.js';
const cmpStaticOrder = (a, b)=>a.constructor.order - b.constructor.order;
const sortStaticOrder = (arr)=>arr.sort(cmpStaticOrder);
const _enableList = [];
const tmpPool = [];
const getTempArray = ()=>{
return tmpPool.pop() ?? [];
};
const releaseTempArray = (a)=>{
a.length = 0;
tmpPool.push(a);
};
class Entity extends GraphNode {
static{
this.EVENT_DESTROY = 'destroy';
}
constructor(name, app = getApplication()){
super(name), this.c = {}, this._destroying = false, this._guid = null, this._template = false;
this._app = app;
}
addComponent(type, data) {
const system = this._app.systems[type];
if (!system) {
return null;
}
if (this.c[type]) {
return null;
}
return system.addComponent(this, data);
}
removeComponent(type) {
const system = this._app.systems[type];
if (!system) {
return;
}
if (!this.c[type]) {
return;
}
system.removeComponent(this);
}
findComponent(type) {
const entity = this.findOne((entity)=>entity.c?.[type]);
return entity && entity.c[type];
}
findComponents(type) {
return this.find((entity)=>entity.c?.[type]).map((entity)=>entity.c[type]);
}
findScript(nameOrType) {
const entity = this.findOne((node)=>node.c?.script?.has(nameOrType));
return entity?.c.script.get(nameOrType);
}
findScripts(nameOrType) {
const entities = this.find((node)=>node.c?.script?.has(nameOrType));
return entities.map((entity)=>entity.c.script.get(nameOrType));
}
getGuid() {
if (!this._guid) {
this.setGuid(guid.create());
}
return this._guid;
}
setGuid(guid) {
const index = this._app._entityIndex;
if (this._guid) {
delete index[this._guid];
}
this._guid = guid;
index[this._guid] = this;
}
_notifyHierarchyStateChanged(node, enabled) {
let enableFirst = false;
if (node === this && _enableList.length === 0) {
enableFirst = true;
}
node._beingEnabled = true;
node._onHierarchyStateChanged(enabled);
if (node._onHierarchyStatePostChanged) {
_enableList.push(node);
}
const c = node._children;
for(let i = 0, len = c.length; i < len; i++){
if (c[i]._enabled) {
this._notifyHierarchyStateChanged(c[i], enabled);
}
}
node._beingEnabled = false;
if (enableFirst) {
for(let i = 0; i < _enableList.length; i++){
_enableList[i]._onHierarchyStatePostChanged();
}
_enableList.length = 0;
}
}
_onHierarchyStateChanged(enabled) {
super._onHierarchyStateChanged(enabled);
const components = this._getSortedComponents();
for(let i = 0; i < components.length; i++){
const component = components[i];
if (component.enabled) {
if (enabled) {
component.onEnable();
} else {
component.onDisable();
}
}
}
releaseTempArray(components);
}
_onHierarchyStatePostChanged() {
const components = this._getSortedComponents();
for(let i = 0; i < components.length; i++){
components[i].onPostStateChange();
}
releaseTempArray(components);
}
findByGuid(guid) {
if (this._guid === guid) return this;
const e = this._app._entityIndex[guid];
if (e && (e === this || e.isDescendantOf(this))) {
return e;
}
return null;
}
destroy() {
this._destroying = true;
for(const name in this.c){
this.c[name].enabled = false;
}
for(const name in this.c){
this.c[name].system.removeComponent(this);
}
super.destroy();
if (this._guid) {
delete this._app._entityIndex[this._guid];
}
this._destroying = false;
}
clone() {
const duplicatedIdsMap = {};
const clone = this._cloneRecursively(duplicatedIdsMap);
duplicatedIdsMap[this.getGuid()] = clone;
resolveDuplicatedEntityReferenceProperties(this, this, clone, duplicatedIdsMap);
return clone;
}
_getSortedComponents() {
const components = this.c;
const sortedArray = getTempArray();
let needSort = 0;
for(const type in components){
if (components.hasOwnProperty(type)) {
const component = components[type];
needSort |= component.constructor.order !== 0;
sortedArray.push(component);
}
}
if (needSort && sortedArray.length > 1) {
sortStaticOrder(sortedArray);
}
return sortedArray;
}
_cloneRecursively(duplicatedIdsMap) {
const clone = new this.constructor(undefined, this._app);
super._cloneInternal(clone);
for(const type in this.c){
const component = this.c[type];
component.system.cloneComponent(this, clone);
}
for(let i = 0; i < this._children.length; i++){
const oldChild = this._children[i];
if (oldChild instanceof Entity) {
const newChild = oldChild._cloneRecursively(duplicatedIdsMap);
clone.addChild(newChild);
duplicatedIdsMap[oldChild.getGuid()] = newChild;
}
}
return clone;
}
}
function resolveDuplicatedEntityReferenceProperties(oldSubtreeRoot, oldEntity, newEntity, duplicatedIdsMap) {
if (oldEntity instanceof Entity) {
const components = oldEntity.c;
for(const componentName in components){
const component = components[componentName];
const entityProperties = component.system.getPropertiesOfType('entity');
for(let i = 0, len = entityProperties.length; i < len; i++){
const propertyDescriptor = entityProperties[i];
const propertyName = propertyDescriptor.name;
const oldEntityReferenceId = component[propertyName];
const entityIsWithinOldSubtree = !!oldSubtreeRoot.findByGuid(oldEntityReferenceId);
if (entityIsWithinOldSubtree) {
const newEntityReferenceId = duplicatedIdsMap[oldEntityReferenceId].getGuid();
if (newEntityReferenceId) {
newEntity.c[componentName][propertyName] = newEntityReferenceId;
}
}
}
}
if (components.script) {
newEntity.script.resolveDuplicatedEntityReferenceProperties(components.script, duplicatedIdsMap);
}
if (components.render) {
newEntity.render.resolveDuplicatedEntityReferenceProperties(components.render, duplicatedIdsMap);
}
if (components.button) {
newEntity.button.resolveDuplicatedEntityReferenceProperties(components.button, duplicatedIdsMap);
}
if (components.scrollview) {
newEntity.scrollview.resolveDuplicatedEntityReferenceProperties(components.scrollview, duplicatedIdsMap);
}
if (components.scrollbar) {
newEntity.scrollbar.resolveDuplicatedEntityReferenceProperties(components.scrollbar, duplicatedIdsMap);
}
if (components.anim) {
newEntity.anim.resolveDuplicatedEntityReferenceProperties(components.anim, duplicatedIdsMap);
}
const _old = oldEntity.children.filter((e)=>e instanceof Entity);
const _new = newEntity.children.filter((e)=>e instanceof Entity);
for(let i = 0, len = _old.length; i < len; i++){
resolveDuplicatedEntityReferenceProperties(oldSubtreeRoot, _old[i], _new[i], duplicatedIdsMap);
}
}
}
export { Entity };