问题描述:

When we load an Object3D with OBJMTLLoader, it is not possible to use raycaster to pick this object with mouse. Intersection array length is always 0. Any one knows the reason? Below is the code...

The loader routine

 var loader2 = new THREE.OBJMTLLoader();

loader2.load('/assets/unwrap/masa/dogtasmasa.obj', '/assets/unwrap/masa/dogtasmasa.mtl', function (object) {

object.position.y = 1.5;

object.position.x = 0;

object.position.z = 2;

object.rotateX(-Math.PI / 2);

object.rotateZ(-Math.PI / 2);

object.scale.set(0.04, 0.04, 0.04);

object.castShadow = true;

scene.add(object);

});

and the picking

 function onDocumentMouseDown(event) {

event.preventDefault();

SCREEN_WIDTH = window.innerWidth - 5;

SCREEN_HEIGHT = window.innerHeight - 5;

var vector = new THREE.Vector3((event.clientX / SCREEN_WIDTH) * 2 - 1, -(event.clientY / SCREEN_HEIGHT) * 2 + 1, 0.5);

projector.unprojectVector(vector, camera);

var raycaster = new THREE.Raycaster(camera.position, vector.sub(camera.position).normalize());

var intersects = raycaster.intersectObjects(scene.children);

if (intersects.length > 0) {

for (var i = 0; i < intersects.length; i++) {

var obj = intersects[i].object;

controls.enabled = false;

tControls.attach();

}

}

else {

controls.enabled = true;

tControls.detach();

}

}

The scene is the whole browser window. Any other mesh cerated via THREE types can be picked, but object3d not...

Thanks for all kinds of help

网友答案:

Add the recursive flag like so:

var intersects = raycaster.intersectObjects( objects, true );

three.js r.66

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