Graphics Reference
In-Depth Information
scene.add(obj);
});
As you can see, we pass both
.obj
and
.mtl
files into the
load
function.
The final argument of this
load
function is a
callback
function. This
call-
back
function will be called when the model is done loading.
3. At this point, you can do everything you want with the loaded model. In this
example, we add the scaling and rotation functionality through the menu in
the top-right section and apply these properties to the
render
function:
function render() {
renderer.render(scene, camera);
var lego =
scene.getObjectByName('lego');
if (lego) {
lego.rotation.y +=
control.rotationSpeed;
lego.scale.set(control.scale,
control.scale, control.scale);
}
requestAnimationFrame(render);
}
How it works...
The
.obj
and
.mtl
file formats are well-documented formats.
OBJMTLLoader
parses the information from these two files and creates geometries and materials
based on that information. It uses the
.obj
file to determine an object's geometry
and uses information from the
.mtl
file to determine the material, which is
THREE.MeshLambertMaterial
in this case, to be used for each geometry.
Three.js then combines these together into
THREE.Mesh
objects and returns a
single
THREE.Object3D
object that contains all the parts of the
Lego
figure, which
you can then add to the scene.
