threejs一对一加载obj

Question

我试图像这样在Threejs中加载OBJ

var objLoader = new THREE.OBJLoader();
objLoader.setPath(codepenAssetUrl1);
objLoader.load( 'wtc.obj', function ( object ) {    
    object.traverse( function ( child ) {
        if ( child instanceof THREE.Mesh ) {
            let scale = 0.08;

            let area = new THREE.Box3();
                area.setFromObject( child );
            let yOffset = (area.max.y * scale) / 2;

            child.geometry.scale(scale,scale,scale);
            rocketPoints = THREE.GeometryUtils.randomPointsInBufferGeometry(child.geometry, particleCount);
            createVertices(rocketParticles, rocketPoints, yOffset, 2);
        }
    });
});

另一个是这个

var objLoader = new THREE.OBJLoader();
objLoader.setPath(codepenAssetUrl1);
objLoader.load( 'avap.obj', function ( object ) {   
    object.traverse( function ( child ) {
        if ( child instanceof THREE.Mesh ) {
            let scale = 0.0021;

            let area = new THREE.Box3();
                area.setFromObject( child );
            let yOffset = (area.max.y * scale) / 2;
            const numberOfParticles1 = 3000000;
            var particleCount1 = numberOfParticles1;


            child.geometry.scale(scale,scale,scale);
            spherePoints = THREE.GeometryUtils.randomPointsInBufferGeometry(child.geometry, particleCount1);
            createVertices(sphereParticles, spherePoints, yOffset, 3);
        }
    });
},onProgress);

这是下一个

var objLoader = new THREE.OBJLoader();
objLoader.setPath(codepenAssetUrl1);
objLoader.load( '3.obj', function ( object ) {
    object.traverse( function ( child ) {
        if ( child instanceof THREE.Mesh ) {
            let scale = 0.2;

            let area = new THREE.Box3();
                area.setFromObject( child );
            let yOffset = (area.max.y * scale) / 2;

            child.geometry.scale(scale,scale,scale);
            spacemanPoints = THREE.GeometryUtils.randomPointsInBufferGeometry(child.geometry, particleCount*2);

            createVertices(spacemanParticles, spacemanPoints, yOffset, 3);
        }
    });
});

总共我必须加载3个以上的obj，但现在3个obj导致浏览器崩溃 所以 问题是obj一次加载所有内容，这会导致浏览器崩溃。

所以我要如何一个接一个地装载。