加载多个模型时，在Forge Viewer中获取选定的元素属性 [英] Getting selected elements properties in forge viewer when more then one model loaded

问题描述

我有一个装有8个模型的查看器应用程序

I have have a viewer app with 8 models loaded

我有一个插件在寻找"AGGREGATE_SELECTION_CHANGED_EVENT" 事件

I have a plugin looking for the "AGGREGATE_SELECTION_CHANGED_EVENT" event

this.viewer.addEventListener(Autodesk.Viewing.AGGREGATE_SELECTION_CHANGED_EVENT, this.onSelectionBinded);

我需要能够访问所选元素的属性

I need to be able to get access to the selected elements properties

this.viewer.getProperties(_dbId, (result) => { })

但它接缝显示查看器仅查看最后加载的模型，而不是全部查看.我是否必须 load/switch 到其他型号?如果可以的话.

but it seams the viewer is only looking at the last loaded model not all of them. do i have to load/switch to the other models ? and if so how.

推荐答案

根据我的经验， viewer.model 始终指向第一个加载的模型.如果要访问其他已加载的模型，则可以通过调用 viewer.impl.modelQueue().getModels()来获取它们.然后，以这种方式调用Viewer属性API:

The viewer.model is always pointed to the first loaded model with my experience. If you want to access other loaded models, you can obtain them via calling viewer.impl.modelQueue().getModels(). Afterward, call Viewer properties APIs in this way:

var allModels = viewer.impl.modelQueue().getModels();
var model = allModels[1];
model.getProperties( dbId, onSuccessCallback, onErrorCallback );

此外，您可以在 onSelectionBinded 回调的函数参数 event 中获得模型实例.因此，可以根据上述逻辑将您的 onSelectionBinded 修改为此:

Besides, you can obtain the model instance in the function argument event of your onSelectionBinded callback. So, your onSelectionBinded can be modified to this based on the above logic:

this.onSelectionBinded = function( event ) {
    var selSet = event.selections;
    var firstSel = selSet[0];

    var model = firstSel.model;
    var dbIds = firstSel.dbIdArray;
    var firstDbId = dbIds[0];

    model.getProperties( firstDbId, onSuccessCallback, onErrorCallback );
}

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