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[READ-ONLY] Mirror of https://github.com/flo-bit/shapecraft. flo-bit.dev/shapecraft
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3.5 kB · 235 lines
JavaScript
at commit 049ef598
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236import { Vector3 } from '../math/Vector3.js';import { Object3D } from '../core/Object3D.js';
const _v1 = /*@__PURE__*/ new Vector3();const _v2 = /*@__PURE__*/ new Vector3();
class LOD extends Object3D {
constructor() {
super();
this._currentLevel = 0;
this.type = 'LOD';
Object.defineProperties( this, { levels: { enumerable: true, value: [] }, isLOD: { value: true, } } );
this.autoUpdate = true;
}
copy( source ) {
super.copy( source, false );
const levels = source.levels;
for ( let i = 0, l = levels.length; i < l; i ++ ) {
const level = levels[ i ];
this.addLevel( level.object.clone(), level.distance, level.hysteresis );
}
this.autoUpdate = source.autoUpdate;
return this;
}
addLevel( object, distance = 0, hysteresis = 0 ) {
distance = Math.abs( distance );
const levels = this.levels;
let l;
for ( l = 0; l < levels.length; l ++ ) {
if ( distance < levels[ l ].distance ) {
break;
}
}
levels.splice( l, 0, { distance: distance, hysteresis: hysteresis, object: object } );
this.add( object );
return this;
}
removeLevel( distance ) {
const levels = this.levels;
for ( let i = 0; i < levels.length; i ++ ) {
if ( levels[ i ].distance === distance ) {
const removedElements = levels.splice( i, 1 ); this.remove( removedElements[ 0 ].object );
return true;
}
}
return false;
}
getCurrentLevel() {
return this._currentLevel;
}
getObjectForDistance( distance ) {
const levels = this.levels;
if ( levels.length > 0 ) {
let i, l;
for ( i = 1, l = levels.length; i < l; i ++ ) {
let levelDistance = levels[ i ].distance;
if ( levels[ i ].object.visible ) {
levelDistance -= levelDistance * levels[ i ].hysteresis;
}
if ( distance < levelDistance ) {
break;
}
}
return levels[ i - 1 ].object;
}
return null;
}
raycast( raycaster, intersects ) {
const levels = this.levels;
if ( levels.length > 0 ) {
_v1.setFromMatrixPosition( this.matrixWorld );
const distance = raycaster.ray.origin.distanceTo( _v1 );
this.getObjectForDistance( distance ).raycast( raycaster, intersects );
}
}
update( camera ) {
const levels = this.levels;
if ( levels.length > 1 ) {
_v1.setFromMatrixPosition( camera.matrixWorld ); _v2.setFromMatrixPosition( this.matrixWorld );
const distance = _v1.distanceTo( _v2 ) / camera.zoom;
levels[ 0 ].object.visible = true;
let i, l;
for ( i = 1, l = levels.length; i < l; i ++ ) {
let levelDistance = levels[ i ].distance;
if ( levels[ i ].object.visible ) {
levelDistance -= levelDistance * levels[ i ].hysteresis;
}
if ( distance >= levelDistance ) {
levels[ i - 1 ].object.visible = false; levels[ i ].object.visible = true;
} else {
break;
}
}
this._currentLevel = i - 1;
for ( ; i < l; i ++ ) {
levels[ i ].object.visible = false;
}
}
}
toJSON( meta ) {
const data = super.toJSON( meta );
if ( this.autoUpdate === false ) data.object.autoUpdate = false;
data.object.levels = [];
const levels = this.levels;
for ( let i = 0, l = levels.length; i < l; i ++ ) {
const level = levels[ i ];
data.object.levels.push( { object: level.object.uuid, distance: level.distance, hysteresis: level.hysteresis } );
}
return data;
}
}
export { LOD };