javascript - ThreeJS how to change color of hovered face on a PlaneGeometry -

i want change color of hovered face of planegeometry don't find how selected face. here code:

//three.webglrenderer 69  // generating plane var geometryplane = new three.planegeometry( 100, 100, 20, 10 );  (var vertindex = 0; vertindex < geometryplane.vertices.length; vertindex++) {     geometryplane.vertices[vertindex].z += math.random(); } geometryplane.dynamic = true; geometryplane.computefacenormals(); geometryplane.normalsneedupdate = true; var materialplane = new three.meshlambertmaterial( {     color: 0xffff00,     side: three.doubleside,     shading: three.flatshading,     overdraw: 0.5,     vertexcolors: three.facecolors } ); plane = new three.mesh( geometryplane, materialplane ); plane.geometry.colorsneedupdate = true;  // mouse event container[0].addeventlistener( 'mousemove', onmousemove, false ); function onmousemove( event ) {     var mousex = ( event.clientx / window.innerwidth ) * 2 - 1;     var mousey = -( event.clienty / window.innerheight ) * 2 + 1;      var vector = new three.vector3( mousex, mousey, camera.near );     vector.unproject( camera );      raycaster = new three.raycaster( camera.position, vector.sub( camera.position ).normalize() );      if ( intersects.length > 0 ) {         var intersected = intersects[ 0 ].object;         ( var = 0; < intersected.geometry.faces.length; ++ ) {             // change color of faces             // want hovered 1             intersected.geometry.faces[ ].color.sethex( math.random() * 0xffffff );         }     } } 

intersects[0].point intersection point.
intersects[0].face intersected face.

edit : , intersection function not called in code : raycaster created not used.