120 lines
2.3 KiB
JavaScript
120 lines
2.3 KiB
JavaScript
import {
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AnimationClip,
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AnimationMixer,
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Mesh
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} from 'three';
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/**
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* A special type of an animated mesh with a simple interface
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* for animation playback. It allows to playback just one animation
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* without any transitions or fading between animation changes.
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*
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* @augments Mesh
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* @three_import import { MorphAnimMesh } from 'three/addons/misc/MorphAnimMesh.js';
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*/
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class MorphAnimMesh extends Mesh {
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/**
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* Constructs a new morph anim mesh.
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*
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* @param {BufferGeometry} [geometry] - The mesh geometry.
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* @param {Material|Array<Material>} [material] - The mesh material.
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*/
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constructor( geometry, material ) {
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super( geometry, material );
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this.type = 'MorphAnimMesh';
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/**
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* The internal animation mixer.
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*
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* @type {AnimationMixer}
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*/
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this.mixer = new AnimationMixer( this );
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/**
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* The current active animation action.
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*
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* @type {?AnimationAction}
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* @default null
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*/
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this.activeAction = null;
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}
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/**
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* Sets the animation playback direction to "forward".
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*/
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setDirectionForward() {
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this.mixer.timeScale = 1.0;
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}
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/**
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* Sets the animation playback direction to "backward".
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*/
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setDirectionBackward() {
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this.mixer.timeScale = - 1.0;
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}
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/**
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* Plays the defined animation clip. The implementation assumes the animation
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* clips are stored in {@link Object3D#animations} or the geometry.
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*
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* @param {string} label - The name of the animation clip.
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* @param {number} fps - The FPS of the animation clip.
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*/
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playAnimation( label, fps ) {
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if ( this.activeAction ) {
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this.activeAction.stop();
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this.activeAction = null;
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}
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const clip = AnimationClip.findByName( this, label );
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if ( clip ) {
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const action = this.mixer.clipAction( clip );
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action.timeScale = ( clip.tracks.length * fps ) / clip.duration;
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this.activeAction = action.play();
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} else {
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throw new Error( 'THREE.MorphAnimMesh: animations[' + label + '] undefined in .playAnimation()' );
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}
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}
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/**
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* Updates the animations of the mesh. Must be called inside the animation loop.
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*
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* @param {number} delta - The delta time in seconds.
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*/
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updateAnimation( delta ) {
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this.mixer.update( delta );
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}
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copy( source, recursive ) {
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super.copy( source, recursive );
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this.mixer = new AnimationMixer( this );
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return this;
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}
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}
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export { MorphAnimMesh };
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