Loading `.obj` and `.mtl` files in THREE.js with accompanying PNG textures

I am facing an issue while attempting to load an mtl file with reference to png textures for my obj model. The error I am encountering is as follows:

TypeError: manager.getHandler is not a function

Below is the snippet of my three.js code:

var loadOBJ = function(){
    var mtlLoader = new THREE.MTLLoader();
    mtlLoader.load( "static/pictures/3D/untitled2.mtl", function( materials ) {
            materials.preload();
            console.log(materials);

            var loader = new THREE.OBJLoader(  );
            loader.load( "static/pictures/3D/jaw.obj", addModelInScene);});
};

var addModelInScene = function(object){
    model = object;
    model.rotation.y = 1.55;
    scene.add(model);
    render();
};

Additionally, here is the content of the .mtl file:

newmtl Teeth_UDIM
Ns 255.999998
Ka 1.000000 1.000000 1.000000
Kd 0.480000 0.424000 0.480000
Ks 0.040000 0.040000 0.040000
Ni 1.000000
d 1.000000
illum 2
map_Kd mrm.png

The mrm.png file is located in the same directory as the .mtl and .obj files. When I remove the last line from the .mtl file (map_Kd mrm.png), the error disappears, but the textures are also no longer displaying. Am I missing something in my approach?

Answer №1

An error has occurred: manager.getHandler is not recognized as a function

This particular runtime issue suggests that the current version of MTLLoader is more recent than your three.js version. It is crucial to ensure that both the core files and example files (such as OBJLoader or MTLLoader) are all from the same release. Utilizing the most recent release, preferably R109, should resolve this problem.

Additionally, utilizing the npm package for three.js and employing a node-based workflow along with a build tool like rollup can help prevent errors like these in the future.

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