three.js - Detecting the faces which are viewed through a rectangle div -

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Here I struggle to detect the face which are seen through Div. Rectangle is in Divi 2D, the model is in 3D space. Nobody can give me some clear suggestions.

face recognition inside the rectangle window

< Div>

The following camera uses a border to make frustum and then test for intersections. 

  var frustum = new THREE.Frustum (); Frustum.setFromMatrix (new THREE.Matrix4 (.) Multiply (camera.projectionMatrix, camera.matrixWorldInverse)); (Var i = 0; i & lt; objects.length; i ++) {if (frustum.intersectsObject (objects [i])) {// intersects} else {// intersection}}  < / Pre>

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