Display wireframe and solid color

Question

Is it possible to display the wireframe of the object and also the solid color of its faces on the same object? I found a way using a clone of the object and assign different materials e.g

var geometry = new THREE.PlaneGeometry(plane.width, plane.height,width - 1, height - 1);
var materialWireframe = new THREE.MeshPhongMaterial({color:"red",wireframe:true});
var materialSolid = new THREE.MeshPhongMaterial({color:"green",wireframe:false});
var plane = new THREE.Mesh(geometry, materialWireframe );
var plane1 = plane.clone();
plane1.material = materialSolid ;
plane1.material.needsUpdate = true;

any thoughts?

Answer 1

To render both a model and its wireframe, you can use a pattern like this one:

// mesh
var material = new THREE.MeshPhongMaterial( {
    color: 0xff0000,
    polygonOffset: true,
    polygonOffsetFactor: 1, // positive value pushes polygon further away
    polygonOffsetUnits: 1
} );
var mesh = new THREE.Mesh( geometry, material );
scene.add( mesh )

// wireframe
var geo = new THREE.EdgesGeometry( mesh.geometry ); // or WireframeGeometry
var mat = new THREE.LineBasicMaterial( { color: 0xffffff, linewidth: 2 } );
var wireframe = new THREE.LineSegments( geo, mat );
mesh.add( wireframe );

The use of polygonOffset will help prevent z-fighting between the mesh material and the wireframe line. Consequently, the wireframe will look a lot better.

fiddle: http://jsfiddle.net/tfjvggfu/24/

EDIT: updated to three.js r.82