Dynamic Color Transformation of Threejs Vehicles during Execution

I have been experimenting with the Threejs cars example found at the following URL:

It's a great way to test realistic objects. I was trying to change the materials for the car on runtime, but I hit a roadblock due to the way the mesh is being added to the scene. I would really appreciate it if someone could help me out by providing a code snippet or a fiddle.

This is how the mesh is currently being added to the scene:

var loader = new THREE.CTMLoader();
                loader.loadParts( "catalog/view/javascript/models/ctm/camaro/camaro.js", function( geometries, materials ) {
                    hackMaterials( materials );
                    for ( var i = 0; i < geometries.length; i ++ ) {
                        var mesh = new THREE.Mesh( geometries[ i ], materials[ i ] );
                        mesh.position.copy( position );
                        mesh.scale.copy( scale );
                        scene.add( mesh );
                    }

Here is the hackMaterials(materials) function that modifies the materials:

function hackMaterials( materials ) {
                // Material modification logic here
            }

I have been attempting to use dat.gui.js to create a color control, but I have only managed to change the color in the console without applying it to the car. It would be greatly appreciated if someone could provide a simple working example with a dropdown color changer.

Thanks in advance.

Answer №1

When working with THREE.js, it is important to remember that in order for changes made to a material to take effect throughout the entire scene, you must remember to include the following line of code:

material.needsUpdate = true;

Has this resolved the issue you were facing, or are there any additional problems to address?

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