EntityTypes.h

//
//  EntityTypes.h
//  libraries/entities/src
//
//  Created by Brad Hefta-Gaub on 12/4/13.
//  Copyright 2013 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
 
#ifndef hifi_EntityTypes_h
#define hifi_EntityTypes_h
 
#include <memory>
 
#include <QHash>
#include <QString>
 
#include "EntitiesLogging.h"
 
class EntityItem;
using EntityItemPointer = std::shared_ptr<EntityItem>;
using EntityItemWeakPointer = std::weak_ptr<EntityItem>;
 
inline uint qHash(const EntityItemPointer& a, uint seed) {
    return qHash(a.get(), seed);
}
 
class EntityItemID;
class EntityItemProperties;
class ReadBitstreamToTreeParams;
 
typedef EntityItemPointer (*EntityTypeFactory)(const EntityItemID& entityID, const EntityItemProperties& properties);
 
class EntityTypes {
public:
    /*@jsdoc
     * <p>An entity may be one of the following types:</p>
     * <table>
     *   <thead>
     *     <tr><th>Value</th><th>Description</th><th>Properties</th></tr>
     *   </thead>
     *   <tbody>
     *     <tr><td><code>"Shape"</code></td><td>A basic entity such as a cube.
     *       See also, the <code>"Box"</code> and <code>"Sphere"</code> entity types.</td>
     *       <td>{@link Entities.EntityProperties-Shape|EntityProperties-Shape}</td></tr>
     *     <tr><td><code>"Box"</code></td><td>A rectangular prism. This is a synonym of <code>"Shape"</code> for the case
     *       where the entity's <code>shape</code> property value is <code>"Cube"</code>.
     *       <p>If an entity is created with its <code>type</code> 
     *       set to <code>"Box"</code> it will always be created with a <code>shape</code> property value of 
     *       <code>"Cube"</code>. If an entity of type <code>Shape</code> or <code>Sphere</code> has its <code>shape</code> set 
     *       to <code>"Cube"</code> then its <code>type</code> will be reported as <code>"Box"</code>.</p></td>
     *       <td>{@link Entities.EntityProperties-Box|EntityProperties-Box}</td></tr>
     *     <tr><td><code>"Sphere"</code></td><td>A sphere. This is a synonym of <code>"Shape"</code> for the case
     *       where the entity's <code>shape</code> property value is <code>"Sphere"</code>.
     *       <p>If an entity is created with its <code>type</code>
     *       set to <code>"Sphere"</code> it will always be created with a <code>shape</code> property value of
     *       <code>"Sphere"</code>. If an entity of type <code>Box</code> or <code>Shape</code> has its <code>shape</code> set
     *       to <code>"Sphere"</code> then its <code>type</code> will be reported as <code>"Sphere"</code>.</td>
     *       <td>{@link Entities.EntityProperties-Sphere|EntityProperties-Sphere}</td></tr>
     *     <tr><td><code>"Model"</code></td><td>A mesh model from a glTF, FBX, or OBJ file.</td>
     *       <td>{@link Entities.EntityProperties-Model|EntityProperties-Model}</td></tr>
     *     <tr><td><code>"Text"</code></td><td>A pane of text oriented in space.</td>
     *       <td>{@link Entities.EntityProperties-Text|EntityProperties-Text}</td></tr>
     *     <tr><td><code>"Image"</code></td><td>An image oriented in space.</td>
     *       <td>{@link Entities.EntityProperties-Image|EntityProperties-Image}</td></tr>
     *     <tr><td><code>"Web"</code></td><td>A browsable web page.</td>
     *       <td>{@link Entities.EntityProperties-Web|EntityProperties-Web}</td></tr>
     *     <tr><td><code>"ParticleEffect"</code></td><td>A particle system that can be used to simulate things such as fire, 
     *       smoke, snow, magic spells, etc.</td>
     *       <td>{@link Entities.EntityProperties-ParticleEffect|EntityProperties-ParticleEffect}</td></tr>
     *     <tr><td><code>"Line"</code></td><td>A sequence of one or more simple straight lines.</td>
     *       <td>{@link Entities.EntityProperties-Line|EntityProperties-Line}</td></tr>
     *     <tr><td><code>"PolyLine"</code></td><td>A sequence of one or more textured straight lines.</td>
     *       <td>{@link Entities.EntityProperties-PolyLine|EntityProperties-PolyLine}</td></tr>
     *     <tr><td><code>"PolyVox"</code></td><td>A set of textured voxels.</td>
     *       <td>{@link Entities.EntityProperties-PolyVox|EntityProperties-PolyVox}</td></tr>
     *     <tr><td><code>"Grid"</code></td><td>A grid of lines in a plane.</td>
     *       <td>{@link Entities.EntityProperties-Grid|EntityProperties-Grid}</td></tr>
     *     <tr><td><code>"Gizmo"</code></td><td>A gizmo intended for UI.</td>
     *       <td>{@link Entities.EntityProperties-Gizmo|EntityProperties-Gizmo}</td></tr>
     *     <tr><td><code>"Light"</code></td><td>A local lighting effect.</td>
     *       <td>{@link Entities.EntityProperties-Light|EntityProperties-Light}</td></tr>
     *     <tr><td><code>"Zone"</code></td><td>A volume of lighting effects and avatar permissions.</td>
     *       <td>{@link Entities.EntityProperties-Zone|EntityProperties-Zone}</td></tr>
     *     <tr><td><code>"Material"</code></td><td>Modifies the existing materials on entities and avatars.</td>
     *       <td>{@link Entities.EntityProperties-Material|EntityProperties-Material}</td></tr>
     *   </tbody>
     * </table>
     * @typedef {string} Entities.EntityType
     */
    typedef enum EntityType_t {
        Unknown,
        Box,
        Sphere,
        Shape,
        Model,
        Text,
        Image,
        Web,
        ParticleEffect,
        Line,
        PolyLine,
        PolyVox,
        Grid,
        Gizmo,
        Light,
        Zone,
        Material,
        NUM_TYPES
    } EntityType;
 
    static bool typeIsValid(EntityType type);
    static const QString& getEntityTypeName(EntityType entityType);
    static EntityTypes::EntityType getEntityTypeFromName(const QString& name);
    static bool registerEntityType(EntityType entityType, const char* name, EntityTypeFactory factoryMethod);
    static void extractEntityTypeAndID(const unsigned char* data, int dataLength, EntityTypes::EntityType& typeOut, QUuid& idOut);
    static EntityItemPointer constructEntityItem(EntityType entityType, const EntityItemID& entityID, const EntityItemProperties& properties);
    static EntityItemPointer constructEntityItem(const unsigned char* data, int bytesToRead);
    static EntityItemPointer constructEntityItem(const QUuid& id, const EntityItemProperties& properties);
 
private:
    static QMap<EntityType, QString> _typeToNameMap;
    static QMap<QString, EntityTypes::EntityType> _nameToTypeMap;
    static EntityTypeFactory _factories[NUM_TYPES];
    static bool _factoriesInitialized;
};
 
 
//        static EntityItemPointer factory(const EntityItemID& entityID, const EntityItemProperties& properties);
#define REGISTER_ENTITY_TYPE(x) bool x##Registration = \
            EntityTypes::registerEntityType(EntityTypes::x, #x, x##EntityItem::factory);
 
 
struct EntityRegistrationChecker {
    EntityRegistrationChecker(bool result, const char* debugMessage) {
        if (!result) {
            qCDebug(entities) << debugMessage;
        }
    }
};
 
//        static EntityItemPointer factory(const EntityItemID& entityID, const EntityItemProperties& properties);
#define REGISTER_ENTITY_TYPE_WITH_FACTORY(x,y) static bool x##Registration = \
            EntityTypes::registerEntityType(EntityTypes::x, #x, y); \
            EntityRegistrationChecker x##RegistrationChecker( \
                x##Registration, \
                "UNEXPECTED: REGISTER_ENTITY_TYPE_WITH_FACTORY(" #x "," #y ") FAILED.!");
 
 
#endif // hifi_EntityTypes_h