git.r.bdr.sh - rbdr/sumo/blob - lib/factories/sumo.js

   1 import { Bodies, Constraint } from 'matter-js';
   2 import { Entity } from '@serpentity/serpentity';
   3
   4 // Components
   5
   6 import AngleComponent from '../components/angle';
   7 import BodyComponent from '../components/body';
   8 import ControlMapComponent from '../components/control_map';
   9 import CoupledEntitiesComponent from '../components/coupled_entities';
  10 import DashComponent from '../components/dash';
  11 import ElasticComponent from '../components/elastic';
  12 import ForceComponent from '../components/force';
  13 import MaxVelocityComponent from '../components/max_velocity';
  14 import PositionComponent from '@serpentity/components.position';
  15 import PixiContainerComponent from '../components/pixi_container';
  16
  17 import PixiFactory from '../factories/pixi';
  18 import Config from '../config';
  19
  20 const internals = {
  21   kNoEntityError: 'Entity Not Found: This method requires entityA and entityB to be set in the config.',
  22   kEntityHasNoBodyError: 'Entity Has No Body: This method requires entities have a BodyComponent.'
  23 };
  24
  25 /**
  26  * Factory object that contains many methods to create prefab entities.
  27  *
  28  * @type object
  29  * @name SumoFactory
  30  */
  31 export default {
  32
  33   /**
  34    * Creates a sumo entity and adds it to the engine. Can override
  35    * position in the config object
  36    *
  37    * @function createSumo
  38    * @memberof SumoFactory
  39    * @param {external:Serpentity} [engine] the serpentity engine to attach
  40    * to. If not sent, it will not be attached.
  41    * @param {object} [config] the config to override the entity, accepts
  42    * the key `position` as an object with an x and y property.
  43    * @return {external:Serpentity.Entity} the created entity
  44    */
  45   createSumo(engine, config = {}) {
  46
  47     const entity = new Entity();
  48
  49     // POSITION
  50
  51     entity.addComponent(new PositionComponent(config.position));
  52     const position = entity.getComponent(PositionComponent);
  53
  54     entity.addComponent(new AngleComponent(config.angle));
  55     const angle = entity.getComponent(AngleComponent);
  56
  57     entity.addComponent(new ForceComponent(config.force));
  58
  59     config.maxVelocity = {
  60       maxVelocity: 12
  61     };
  62     entity.addComponent(new MaxVelocityComponent(config.maxVelocity));
  63
  64     // CONTROLS & ABILITIES
  65
  66     entity.addComponent(new DashComponent(config.dash));
  67
  68     // RENDERING
  69
  70     const radius = 25;
  71
  72     const container = config.container || {
  73       container: PixiFactory.createSumo({ radius })
  74     };
  75     container.container.position.x = position.x;
  76     container.container.position.y = position.y;
  77     container.container.rotation = angle.angle;
  78     entity.addComponent(new PixiContainerComponent(container));
  79
  80     // PHYSICS
  81
  82     const frictionAir = 0.02;
  83     const friction = 1;
  84     const frictionStatic = 1;
  85     const restitution = 1;
  86     const density = 1.5;
  87
  88     const body = Bodies.circle(position.x / Config.meterSize, position.y / Config.meterSize, radius / Config.meterSize, {
  89       label: 'Sumo body',
  90       angle: angle.angle,
  91       density,
  92       frictionAir,
  93       frictionStatic,
  94       friction,
  95       restitution
  96     });
  97     entity.addComponent(new BodyComponent({ body }));
  98
  99     if (engine) {
 100       engine.addEntity(entity);
 101     }
 102
 103     return entity;
 104   },
 105
 106   /**
 107    * Creates a rubber band entity and adds it to the engine.
 108    *
 109    * @function createRubberBand
 110    * @memberof SumoFactory
 111    * @param {external:Serpentity} [engine] the serpentity engine to attach
 112    * to. If not sent, it will not be attached.
 113    * @param {object} [config] the config to override the entity, it
 114    * must include entityA and entityB which will be tied by it. If they
 115    * are not sent or don't have a physics body, this will throw.
 116    * @return {external:Serpentity.Entity} the created entity
 117    */
 118   createRubberBand(engine, config = {}) {
 119
 120     const entity = new Entity();
 121
 122     if (!config.entityA || !config.entityB) {
 123       throw new Error(internals.kNoEntityError);
 124     }
 125
 126     if (!config.entityA.hasComponent(BodyComponent) || !config.entityB.hasComponent(BodyComponent)) {
 127       throw new Error(internals.kEntityHasNoBodyError);
 128     }
 129
 130     // RENDERING
 131
 132     const container = config.container || {
 133       container: PixiFactory.createEmptyGraphic()
 134     };
 135     entity.addComponent(new PixiContainerComponent(container));
 136
 137     // PHYSICS
 138
 139     const bodyA = config.entityA.getComponent(BodyComponent).body;
 140     const bodyB = config.entityB.getComponent(BodyComponent).body;
 141     const damping = 0;
 142     const length = 100 / Config.meterSize;
 143     const stiffness = 0.001;
 144
 145     const body = Constraint.create({
 146       bodyA,
 147       bodyB,
 148       damping,
 149       length,
 150       stiffness
 151     });
 152     entity.addComponent(new BodyComponent({ body }));
 153
 154     entity.addComponent(new CoupledEntitiesComponent({
 155       coupledEntities: [config.entityA, config.entityB]
 156     }));
 157
 158     entity.addComponent(new ElasticComponent());
 159
 160     if (engine) {
 161       engine.addEntity(entity);
 162     }
 163
 164     return entity;
 165   },
 166
 167   /**
 168    * Creates a controllable sumo entity and adds it to the engine. Can override
 169    * position in the config object
 170    *
 171    * @function createControllableSumo
 172    * @memberof SumoFactory
 173    * @param {external:Serpentity} [engine] the serpentity engine to attach
 174    * to. If not sent, it will not be attached.
 175    * @param {object} [config] the config to override the entity, accepts
 176    * the key `position` as an object with an x and y property.
 177    * @return {external:Serpentity.Entity} the created entity
 178    */
 179   createControllableSumo(engine, config = {}) {
 180
 181     const entity = this.createSumo(null, config);
 182
 183     entity.addComponent(new ControlMapComponent({
 184       map: [
 185         {
 186           source: {
 187             type: 'keyboard',
 188             index: 37 // left arrow
 189           },
 190           target: {
 191             component: ForceComponent,
 192             property: 'x',
 193             value: (value) => -Number(value)
 194           }
 195         },
 196         {
 197           source: {
 198             type: 'keyboard',
 199             index: 39 // right arrow
 200           },
 201           target: {
 202             component: ForceComponent,
 203             property: 'x',
 204             value: (value) => Number(value)
 205           }
 206         },
 207         {
 208           source: {
 209             type: 'keyboard',
 210             index: 38 // up arrow
 211           },
 212           target: {
 213             component: ForceComponent,
 214             property: 'y',
 215             value: (value) => -Number(value)
 216           }
 217         },
 218         {
 219           source: {
 220             type: 'keyboard',
 221             index: 40 // down arrow
 222           },
 223           target: {
 224             component: ForceComponent,
 225             property: 'y',
 226             value: (value) => Number(value)
 227           }
 228         },
 229         {
 230           source: {
 231             type: 'keyboard',
 232             index: 90 // Z
 233           },
 234           target: {
 235             component: DashComponent,
 236             property: 'dashing'
 237           }
 238         }
 239       ]
 240     }));
 241
 242     if (engine) {
 243       engine.addEntity(entity);
 244     }
 245
 246     return entity;
 247   },
 248
 249   /**
 250    * Creates a static harness entity
 251    *
 252    * @function createHarness
 253    * @memberof SumoFactory
 254    * @param {external:Serpentity} [engine] the serpentity engine to attach
 255    * to. If not sent, it will not be attached.
 256    * @param {object} [config] the config to override the entity, accepts
 257    * the key `position` as an object with an x and y property.
 258    * @return {external:Serpentity.Entity} the created entity
 259    */
 260   createHarness(engine, config = {}) {
 261
 262     const entity = new Entity();
 263
 264     // POSITION
 265
 266     entity.addComponent(new PositionComponent(config.position));
 267     const position = entity.getComponent(PositionComponent);
 268
 269     // RENDERING
 270
 271     const radius = 15;
 272
 273     const container = config.container || {
 274       container: PixiFactory.createHarness({ radius })
 275     };
 276     container.container.position.x = position.x;
 277     container.container.position.y = position.y;
 278     entity.addComponent(new PixiContainerComponent(container));
 279
 280     // PHYSICS
 281
 282     const friction = 0;
 283     const frictionStatic = 0;
 284     const restitution = 1;
 285
 286     const body = Bodies.circle(position.x / Config.meterSize, position.y / Config.meterSize, radius / Config.meterSize, {
 287       isStatic: true,
 288       label: 'Harness body',
 289       friction,
 290       restitution,
 291       frictionStatic
 292     });
 293     entity.addComponent(new BodyComponent({ body }));
 294
 295     if (engine) {
 296       engine.addEntity(entity);
 297     }
 298
 299     return entity;
 300   },
 301
 302   /**
 303    * Creates a static arena entity
 304    *
 305    * @function createArena
 306    * @memberof SumoFactory
 307    * @param {external:Serpentity} [engine] the serpentity engine to attach
 308    * to. If not sent, it will not be attached.
 309    * @param {object} [config] the config to override the entity, accepts
 310    * the key `position` as an object with an x and y property.
 311    * @return {external:Serpentity.Entity} the created entity
 312    */
 313   createArena(engine, config = {}) {
 314
 315     const entity = new Entity();
 316
 317     // POSITION
 318
 319     entity.addComponent(new PositionComponent(config.position));
 320     const position = entity.getComponent(PositionComponent);
 321
 322     // RENDERING
 323
 324     const radius = 300;
 325
 326     const container = config.container || {
 327       container: PixiFactory.createArena({ radius })
 328     };
 329     container.container.position.x = position.x;
 330     container.container.position.y = position.y;
 331     entity.addComponent(new PixiContainerComponent(container));
 332
 333     if (engine) {
 334       engine.addEntity(entity);
 335     }
 336
 337     return entity;
 338   }
 339 };