threejs-minecraft-24

class RayHelper {
    constructor( ) {
        this.line = null;
    }

    attach( raycaster, scene ) {
        if( !raycaster || !scene ) return;

        const rayLineGeometry = new THREE.Geometry();
        rayLineGeometry.vertices.push( raycaster.ray.origin.clone() );
        rayLineGeometry.vertices.push( raycaster.ray.origin.clone().add( raycaster.ray.direction.clone().setLength( 10000 ) ) );

        const rayLineMaterial = new THREE.LineBasicMaterial({ color: 0x00ff00 });
        const line = new THREE.Line( rayLineGeometry, rayLineMaterial );

        this.line = line; scene.add( line );
    }

    detach( scene ) {
        if( !this.line ) return;

        scene.remove( this.line );
        delete this.line;
        this.line = null;
    }
}