问题描述
我需要通过鼠标单击在Three.JS中选择Collada对象.我知道我可以根据其ID选择对象,并且看到一些用户可以与Geometry定义的对象进行交互的示例(此处).但是我需要访问Collada格式的对象.
I need to select Collada objects in Three.JS by mouse click. I know that I can select object based on their id and I saw some samples that user can interact with Geometry defined objects (here). But I need to have access to the objects in Collada format.
推荐答案
假定dae_scene
是从ColladaLoader返回的COLLADA场景,可以执行以下操作检查交叉点:
Assuming that dae_scene
is a COLLADA scene returned from the ColladaLoader, here's what you can do to check for intersection:
var toIntersect = [];
THREE.SceneUtils.traverseHierarchy(dae_scene, function (child) {
if (child instanceof THREE.Mesh) {
toIntersect.push(child);
}
});
这将在COLLADA场景中获取所有Mesh对象.然后,您可以使用该数组查找射线相交,如下所示:
This gets all Mesh objects inside the COLLADA scene. You can then use that array to look for ray intersections, like this:
var ray = new THREE.Ray( camera.position,
vector.subSelf( camera.position ).normalize() );
var intersects = ray.intersectObjects( toIntersect );
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