Add better object updates

shared/src/objects/interpolation-type.ts

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+export enum InterpolationType {
+  flat = 'flat',
+  linear = 'linear',
+  linearRotation = 'linearRotation',
+}

shared/src/objects/types/player-character-base.ts

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+import { CharacterBase } from './character-base';
+import { Circle } from '../../helper/circle';
+import { Id } from '../../transport/identity';
+import { serializable } from '../../transport/serialization/serializable';
+
+@serializable
+export class PlayerCharacterBase extends CharacterBase {
+  constructor(
+    id: Id,
+    public name: string,
+    colorIndex: number,
+    head?: Circle,
+    leftFoot?: Circle,
+    rightFoot?: Circle,
+  ) {
+    super(id, colorIndex, head, leftFoot, rightFoot);
+  }
+
+  public toArray(): Array<any> {
+    const { id, name, colorIndex, head, leftFoot, rightFoot } = this;
+    return [id, name, colorIndex, head, leftFoot, rightFoot];
+  }
+}

shared/src/objects/update-message.ts

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+import { serializable } from '../transport/serialization/serializable';
+import { InterpolationType } from './interpolation-type';
+
+@serializable
+export class UpdateMessage {
+  constructor(
+    public key: string,
+    public value: any,
+    public interpolationType?: InterpolationType,
+  ) {}
+
+  public toArray(): Array<any> {
+    return [this.key, this.value, this.interpolationType];
+  }
+}

shared/src/objects/update-object-message.ts

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+import { Id } from '../main';
+import { serializable } from '../transport/serialization/serializable';
+import { UpdateMessage } from './update-message';
+
+@serializable
+export class UpdateObjectMessage {
+  constructor(public id: Id, public updates: Array<UpdateMessage>) {}
+
+  public toArray(): Array<any> {
+    return [this.id, this.updates];
+  }
+}