@rpgjs/physic/dist/index25.js

A deterministic 2D top-down physics library for RPG, sandbox and MMO games

import { World } from "./index23.js";
class Region {
  /**
   * Creates a new region
   * 
   * @param config - Region configuration
   */
  constructor(config) {
    this.entities = /* @__PURE__ */ new Set();
    this.bounds = config.bounds.clone();
    this.overlap = config.overlap ?? 0;
    this.active = config.active ?? true;
    this.world = new World({
      spatialCellSize: 50,
      spatialGridWidth: 50,
      spatialGridHeight: 50
    });
  }
  /**
   * Gets the region bounds
   * 
   * @returns AABB bounds
   */
  getBounds() {
    return this.bounds.clone();
  }
  /**
   * Gets the expanded bounds including overlap
   * 
   * @returns Expanded AABB
   */
  getExpandedBounds() {
    return this.bounds.expand(this.overlap);
  }
  /**
   * Checks if a point is inside this region
   * 
   * @param point - Point to check
   * @returns True if point is inside
   */
  contains(point) {
    return this.bounds.contains(point);
  }
  /**
   * Checks if an entity should belong to this region
   * 
   * @param entity - Entity to check
   * @returns True if entity should be in this region
   */
  shouldContain(entity) {
    return this.bounds.contains(entity.position);
  }
  /**
   * Adds an entity to this region
   * 
   * @param entity - Entity to add
   */
  addEntity(entity) {
    if (this.entities.has(entity)) {
      return;
    }
    this.entities.add(entity);
    this.world.addEntity(entity);
  }
  /**
   * Removes an entity from this region
   * 
   * @param entity - Entity to remove
   */
  removeEntity(entity) {
    if (this.entities.delete(entity)) {
      this.world.removeEntity(entity);
    }
  }
  /**
   * Gets all entities in this region
   * 
   * @returns Array of entities
   */
  getEntities() {
    return Array.from(this.entities);
  }
  /**
   * Steps the region's physics simulation
   */
  step() {
    if (!this.active) {
      return;
    }
    this.world.step();
  }
  /**
   * Activates this region
   */
  activate() {
    this.active = true;
  }
  /**
   * Deactivates this region
   */
  deactivate() {
    this.active = false;
  }
  /**
   * Checks if this region is active
   * 
   * @returns True if active
   */
  isActive() {
    return this.active;
  }
  /**
   * Gets the world instance for this region
   * 
   * @returns World instance
   */
  getWorld() {
    return this.world;
  }
  /**
   * Checks if this region overlaps with another region
   * 
   * @param other - Other region to check
   * @returns True if regions overlap
   */
  overlaps(other) {
    const expandedA = this.getExpandedBounds();
    const expandedB = other.getExpandedBounds();
    return expandedA.intersects(expandedB);
  }
  /**
   * Gets entities that might need migration to neighboring regions
   * 
   * @returns Array of entities near region boundaries
   */
  getBoundaryEntities() {
    const boundaryEntities = [];
    const expandedBounds = this.getExpandedBounds();
    for (const entity of this.entities) {
      if (expandedBounds.contains(entity.position) && !this.bounds.contains(entity.position)) {
        boundaryEntities.push(entity);
      }
    }
    return boundaryEntities;
  }
}
export {
  Region
};
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