Develop Reference

Use multiple Textures in export loader `obj` file in three.js

I tried to use different textures in export loader obj file.
I am able to make my object visible on the scene but I couldn't set either its size nor its shape.
Any idea on what is wrong/is missing in my code ?
var loader = new THREE.OBJLoader();
loader.load(
'models/Sofa/sofa.obj',
function (object) {
var geometry = object.children[ 0 ].geometry;
var materials = [];
materials.push(new THREE.MeshBasicMaterial( { map : THREE.ImageUtils.loadTexture( 'models/Sofa/Texturses/1.jpg')}));
materials.push(new THREE.MeshBasicMaterial( { map : THREE.ImageUtils.loadTexture( 'models/Sofa/Texturses/paradis_beige.jpg')}));
materials.push(new THREE.MeshBasicMaterial( { map : THREE.ImageUtils.loadTexture( 'models/Sofa/Texturses/2.jpg')}));
mesh = THREE.SceneUtils.createMultiMaterialObject(geometry, materials);
object.traverse(function (child) {
if (child instanceof THREE.Mesh) {
child.material = material;
}
});
scene1.add(mesh);
},
function ( xhr ) {
returnValue = ( xhr.loaded / xhr.total * 100 ) + '% loaded';
console.log(returnValue);
},
function ( error ) {
console.log( 'An error happened' );
}
);

scene loaded via objectloader, bump map not rendering

attempting to apply a bump map to an object loaded, but no change is seen on the material
var loader = new THREE.ObjectLoader();
loader.load("../js/brain2.json", function(object) {
var mapHeight = new THREE.TextureLoader().load( "../js/texture.jpg" );
var material = new THREE.MeshPhongMaterial( { color: 0x888888, specular: 0xEEEEEE, shininess: 5} );
object.traverse( function ( child ) {
if ( child instanceof THREE.Mesh ) {
child.material = material;
child.material.bumpMap = mapHeight;
child.material.bumpScale = 1;
var geometry = new THREE.Geometry().fromBufferGeometry( child.geometry );
geometry.computeFaceNormals();
geometry.mergeVertices();
geometry.computeVertexNormals();
child.geometry = new THREE.BufferGeometry().fromGeometry( geometry );
var modifier = new THREE.BufferSubdivisionModifier(1);
modifier.modify(geometry);
child.material.overdraw = 1
};
});
object.scale.set(15, 15, 15);
object.position.x = 1;
object.position.y = 1;
object.position.z = 1;
object.rotation.set( 5, 1, 1 );
scene.add( object );
});
I've already fixed earlier issues with this code, including applying a subdivision modifier to it, but now it appears the bump map refuses to be applied.

How to use glass shader to my house model?

I have been working on ThreeJS for a while, i tried to load a house model using OBJ + MTL loader, now i need to apply glass shaders for window materials
i managed to load the model successfully by
var mtlLoader = new THREE.MTLLoader();
mtlLoader.setBaseUrl( 'new/' );
mtlLoader.setPath( 'new/' );
mtlLoader.load( 'House.mtl', function( materials ) {
materials.preload();
var objLoader = new THREE.OBJLoader();
objLoader.setMaterials( materials );
objLoader.setPath( 'new/' );
objLoader.load( 'House.obj', function ( object ) {
object.position.y = - 5;
object.scale.x=object.scale.y=object.scale.z=0.05
object.castShadow = true;
object.receiveShadow = true;
object.traverse( function( node ) { if ( node instanceof THREE.Mesh ) { node.castShadow = true;
node.receiveShadow = true; } } );
mesh = object;
scene.add( mesh );
});
});
Now i would like to add glass shaders for house windows in this model, in which way should i code, how can i take the reference from loaded house to make a shader ?
Any other way to code glass shader ?

threejs wireframe with the object materials

i want to get the wireframe of an object that is loaded from OBJMTLLoder ,so here i have the code as like below
var loader = new THREE.OBJMTLLoader();
loader.load( 'obj/male02/male02.obj', 'obj/male02/male02_dds.mtl', function ( object ) {
object.traverse( function ( child ) {
if ( child instanceof THREE.Mesh )
{
child.geometry.computeFaceNormals();
var geometry = child.geometry;
console.log(geometry);
geometry.dynamic = true;
material = new THREE.MeshLambertMaterial();
mesh = new THREE.Mesh(geometry, material);
scene.add(mesh);
var useWireFrame = true;
if (useWireFrame) {
mesh.traverse(function (child) {
if (child instanceof THREE.Mesh) child.material.wireframe = true;
});
}
}
object.position.y = - 80;
scene.add( object );
});
} );
this is working well, and i can see the wireframe on my object, unfortunately here my object material is changed into MeshLambertMaterial. but i want to get the wireframe of the object with the default material of the object loaded, i can use variety of Material as in the threejs document, but none of them give me a result with the default object material

i got fixed it by add child.material for material , so here is the answer
loader.load( 'obj/male02/male02.obj', 'obj/male02/male02_dds.mtl', function ( object ) {
object.traverse( function ( child ) {
if ( child instanceof THREE.Mesh )
{
//child.geometry.computeFaceNormals();
var geometry = child.geometry;
//console.log(geometry);
//geometry.dynamic = true;
material = child.material;
mesh = new THREE.Mesh(geometry, material);
scene.add(mesh);
var useWireFrame = true;
if (useWireFrame) {
mesh.traverse(function (child) {
if (child instanceof THREE.Mesh)
{
child.material.wireframe = true;
child.material.color = new THREE.Color( 0x6893DE );
}
});
}
}
object.position.y = - 80;
//scene.add( object );
});
here i added material = child.material; as like geometry = child.geometry; and it worked fine

Multiple mesh with one geometry and different textures. Error

I have a loop where I create a multiple Mesh with different geometry, because each mesh has one texture:
var geoCube = new THREE.CubeGeometry(voxelSize, voxelSize, voxelSize);
var geometry = new THREE.Geometry();
for( var i = 0; i < voxels.length; i++ ){
var voxel = voxels[i];
var object;
color = voxel.color;
texture = almacen.textPlaneTexture(voxel.texto,color,voxelSize);
//Return the texture with a color and a text for each face of the geometry
material = new THREE.MeshBasicMaterial({ map: texture });
object = new THREE.Mesh(geoCube, material);
THREE.GeometryUtils.merge( geometry, object );
}
//Add geometry merged at scene
mesh = new THREE.Mesh( geometry, new THREE.MeshFaceMaterial() );
mesh.geometry.computeFaceNormals();
mesh.geometry.computeVertexNormals();
mesh.geometry.computeTangents();
scene.add( mesh );
But now I have this error in the javascript code Three.js
Uncaught TypeError: Cannot read property 'map' of undefined
In the function:
function bufferGuessUVType ( material ) {
}
Update:
Finally I have removed the merged solution and I can use an unique geometry for the all voxels. Altough I think that If I use merge meshes the app would have a better performance.

For r53+ the code should be something like this:
var geoCube = new THREE.CubeGeometry(voxelSize, voxelSize, voxelSize);
var geometry = new THREE.Geometry();
var materials = [];
for( var i = 0; i < voxels.length; i++ ){
for ( var j = 0; j < geoCube.faces.length; j ++ ) {
geoCube.faces[ j ].materialIndex = i;
}
var object = new THREE.Mesh( geoCube );
// here I assume you'll me positioning the object.
THREE.GeometryUtils.merge( geometry, object );
var voxel = voxels[i];
var texture = almacen.textPlaneTexture(voxel.texto,voxel.color,voxelSize);
materials.push( new THREE.MeshBasicMaterial( { map: texture } ) );
}
// Add geometry to scene
var mesh = new THREE.Mesh( geometry, new THREE.MeshFaceMaterial( materials ) );
mesh.geometry.computeFaceNormals();
mesh.geometry.computeVertexNormals();
scene.add( mesh );

Some methods are expecting the materials array to be in the mesh face material. For example:
function getBufferMaterial( object, geometryGroup ) {
return object.material instanceof THREE.MeshFaceMaterial
? object.material.materials[ geometryGroup.materialIndex ]
: object.material;
};
Its possible to handle this by referencing the materials array both in the geometry and in the mesh face material. So the line where the mesh is created would look something like:
mesh = new THREE.Mesh( geometry, new THREE.MeshFaceMaterial(geometry.materials) );
and in the loop processing the voxels:
geometry.materials.push( new THREE.MeshBasicMaterial({ map: texture }));
Each face in the geometry also needs to have a materialIndex assigned or there will be an error. Looping through geometry.faces[] and assigning a materialIndex might be a good way if you know how many faces each of the voxels has.