icy3dw/src/client/object/pony.ts

import * as SkeletonUtils from 'three/examples/jsm/utils/SkeletonUtils';
import * as THREE from 'three';
import modelLoaderInstance from './pony-loader';
import { FullStatePacket } from '../../common/types/packet';
import { NameTag } from './nametag';
import { CanvasUtils } from './canvas-utils';

const nameTagBuilder = new CanvasUtils();

export class PonyEntity {
  public velocity = new THREE.Vector3(0, 0, 0);
  public angularVelocity = new THREE.Vector3(0, 0, 0);
  public mixer!: THREE.AnimationMixer;
  public container!: THREE.Object3D;
  public model!: THREE.Object3D;
  public walkAnimationState = 0;
  public idleAction: THREE.AnimationAction;
  public walkAction: THREE.AnimationAction;
  public nameTag?: NameTag;
  public changes: FullStatePacket = {};

  initialize() {
    this.model = (SkeletonUtils as any).clone(modelLoaderInstance.ponyModel);
    this.mixer = new THREE.AnimationMixer(this.model);
    this.idleAction = this.mixer.clipAction(modelLoaderInstance.animations[0]);
    this.walkAction = this.mixer.clipAction(modelLoaderInstance.animations[2]);
    this.idleAction.play();
    this.container = new THREE.Object3D();
    this.container.add(this.model);
  }

  update(dt: number) {
    this.container.position.add(this.velocity.clone().multiplyScalar(dt));
    this.container.rotation.setFromVector3(
      new THREE.Vector3(
        this.container.rotation.x,
        this.container.rotation.y,
        this.container.rotation.z,
      ).add(this.angularVelocity.clone().multiplyScalar(dt)),
    );
    this.mixer.update(dt);
  }

  public addNameTag(name: string) {
    this.nameTag = new NameTag(nameTagBuilder, name);
    this.nameTag.tag.position.set(0, 1.8, 0.5);
    this.container.add(this.nameTag.tag);
  }

  public setWalkAnimationState(index: number) {
    const previousState = this.walkAnimationState;
    this.walkAnimationState = index;
    if (previousState === this.walkAnimationState) {
      return;
    }

    this.changes.animState = index;

    if (index === 1) {
      this.walkAction.reset().crossFadeFrom(this.idleAction, 0.5, false).play();
    } else {
      this.walkAction.crossFadeTo(this.idleAction.reset(), 0.5, false).play();
    }
  }
}