/**
* Creates a LOD instance.
*
* @constructor
* @augments THREE.LOD
*
* @param {string} id - The id of the LOD instance.
* @param {number} mode - The transition mode.
* @param {Camera} camera - The camera object.
* @param {number} threshold - The threshold where the blending is done.
*/
function LOD( id, mode, camera, threshold ) {
THREE.LOD.call( this );
Object.defineProperties( this, {
idLOD : {
value : id,
configurable : false,
enumerable : true,
writable : false
},
mode : {
value : mode || LOD.MODE.DIRECT,
configurable : false,
enumerable : true,
writable : true
},
camera : {
value : camera,
configurable : false,
enumerable : true,
writable : true
},
threshold : {
value : threshold || 0,
configurable : false,
enumerable : true,
writable : true
}
} );
}
this.allSystems.forEach( system => {
// Build a LOD mesh for the stars to make them properly rounded
// when viewed up close yet low on geometry at a distance
const starLOD = new THREE.LOD();
for ( let i = 0; i < STAR_LOD_MESHES.length; i++ ) {
const star = new THREE.Mesh( STAR_LOD_MESHES[ i ][ 0 ], material );
star.scale.set( system.scale * config.renderScale, system.scale * config.renderScale, system.scale * config.renderScale );
star.updateMatrix();
star.matrixAutoUpdate = false;
starLOD.addLevel( star, STAR_LOD_MESHES[ i ][ 1 ] );
}
starLOD.position.copy( system.position );
starLOD.updateMatrix();
starLOD.matrixAutoUpdate = false;
starLOD.userData.isSystem = true;
starLOD.userData.isLOD = true;
group.add( starLOD );
});