Forge Viewer如何设置构件的透明度

Question

Autodesk Forge Viewer中如何实现构件的透明与半透明？如何调节构建的opacity？

Answer 1

参考如下代码:

//假设已获取相应nodeId和model
    var model = ...
    var nodeId = ...

    var fragList = viewer.model.getFragmentList();    

    var fragIds = []

    model.getData().instanceTree.enumNodeFragments(
      nodeId, (fragId) => {
       fragIds.push(fragId)
    });

        fragIds.forEach((fragId) => {
          //获取材质
          var material = fragList.getMaterial(fragId);
          
          if(material) {
            //设置透明度
            material.opacity = 0.5;
            material.transparent = true;
            //标记更新
            material.needsUpdate = true
          }
        })
      })
      //更新viewer
      viewer.impl.invalidate(true, true, true)
    
}