Changing texture and color on Three.js collada object

Question

I recently got three.js example from the official site working with my collada objects (.dae) using the ColladaLoader.js. Now my question is, how do i change the loaded collada object color attribute and add a custom texture?? I tried adding the texture with no luck yet.

Here is my code (slightly changed from the original example):

function load_model(el) {

            if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

            var container, stats;

            var camera, scene, renderer, objects;
            var particleLight, pointLight;
            var dae, skin;

            var loader = new THREE.ColladaLoader();
            loader.options.convertUpAxis = true;
            loader.load( '/site_media/models/model.dae', function ( collada ) {
                dae = collada.scene;
                skin = collada.skins[ 0 ];

                dae.scale.x = dae.scale.y = dae.scale.z = 0.90;
                dae.updateMatrix();

                init(el);
                animate();

            } );

            function init(el) {

                container = document.createElement( 'div' );
                el.append( container );

                camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
                camera.position.set( 2, 2, 3 );

                scene = new THREE.Scene();


                scene.add( dae );

                particleLight = new THREE.Mesh( new THREE.SphereGeometry( 4, 8, 8 ), new THREE.MeshBasicMaterial( { color: 0xffffff } ) );
                scene.add( particleLight );

                // Lights

                scene.add( new THREE.AmbientLight( 0xcccccc ) );

                var directionalLight = new THREE.DirectionalLight(/*Math.random() * 0xffffff*/0xeeeeee );
                directionalLight.position.x = Math.random() - 0.5;
                directionalLight.position.y = Math.random() - 0.5;
                directionalLight.position.z = Math.random() - 0.5;
                directionalLight.position.normalize();
                scene.add( directionalLight );

                // pointLight = new THREE.PointLight( 0xffffff, 4 );
                // pointLight.position = particleLight.position;
                // scene.add( pointLight );

                renderer = new THREE.WebGLRenderer();
                renderer.setSize( window.innerWidth/2, window.innerHeight/2 );


                container.appendChild( renderer.domElement );

                stats = new Stats();
                stats.domElement.style.position = 'absolute';
                stats.domElement.style.top = '0px';
                container.appendChild( stats.domElement );

                //

                window.addEventListener( 'resize', onWindowResize, false );

            }

            function onWindowResize() {

                camera.aspect = window.innerWidth / window.innerHeight;
                camera.updateProjectionMatrix();

                renderer.setSize( window.innerWidth/2, window.innerHeight/2 );

            }

            //

            var t = 0;
            var clock = new THREE.Clock();

            function animate() {

                var delta = clock.getDelta();

                requestAnimationFrame( animate );

                if ( t > 1 ) t = 0;

                if ( skin ) {

                    // guess this can be done smarter...

                    // (Indeed, there are way more frames than needed and interpolation is not used at all
                    //  could be something like - one morph per each skinning pose keyframe, or even less,
                    //  animation could be resampled, morphing interpolation handles sparse keyframes quite well.
                    //  Simple animation cycles like this look ok with 10-15 frames instead of 100 ;)

                    for ( var i = 0; i < skin.morphTargetInfluences.length; i++ ) {

                        skin.morphTargetInfluences[ i ] = 0;

                    }

                    skin.morphTargetInfluences[ Math.floor( t * 30 ) ] = 1;

                    t += delta;

                }

                render();
                stats.update();

            }

            function render() {

                var timer = Date.now() * 0.0005;

                camera.position.x = Math.cos( timer ) * 10;
                camera.position.y = 2;
                camera.position.z = Math.sin( timer ) * 10;

                camera.lookAt( scene.position );

                particleLight.position.x = Math.sin( timer * 4 ) * 3009;
                particleLight.position.y = Math.cos( timer * 5 ) * 4000;
                particleLight.position.z = Math.cos( timer * 4 ) * 3009;

                renderer.render( scene, camera );

            }


}

Answer 1

You can override your collada scene materials recursively with this kind of function. It goes through the whole hierarchy and assigns a material.

var setMaterial = function(node, material) {
  node.material = material;
  if (node.children) {
    for (var i = 0; i < node.children.length; i++) {
      setMaterial(node.children[i], material);
    }
  }
}

Use it like setMaterial(dae, new THREE.MeshBasicMaterial({color: 0xff0000}));

You could probably adapt that to modify the existing material properties instead of assigning a new one, if needed.