threejs-model-loader
v0.1.0
Published
THREE.js Model Loader that delegates to the appropriate geometry loader
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gkjohnsonReadme
threejs-model-loader
THREE.js Model Loader for delegating to the appropriate geometry loader. Uses the file's extension to determine which THREE geometry loader to use.
THREE.ModelLoader
var loader = new THREE.ModelLoader();
// overriding the getLoader function so loaders can be
// loaded as-needed
loader.getLoader = function( loaderName, manager, loadercb ) {
function createLoader() {
return new THREE[ loaderName ]( manager );
}
if ( THREE[ loaderName ] == null ) {
// fetch the loader script from the server and run it
// if it's not already on the page
fetch(`.../node_modules/three/examples/js/loaders/${ loaderName }.js`)
.then(res => res.text())
.then(tex => {
eval( text );
loadercb( createLoader() );
});
} else {
loadercb( createLoader() );
}
}
loader.load( '.../model.ply', res => {
// res.model
// res.originalResult
// res.extension
} );Functions
ModelLoader.load(path, onLoad, onProgress, onError, extOverride)
A function signature that mirrors all the THREE.js geometry loaders. An appriopriate loader is selected based on the file name.
If extOverride is set, then that extension is used to select the loader.
onLoad is passed an object with values
{
model, // THREE.js Object3D, Group, or Mesh that was loaded
extension, // The extension of the model that was loaded
originalResult // The original result that the loader returned
}ModelLoader.parse(data, ext, onLoad, onError)
Takes the data to parse into geometry and the associated file extension in ext.
The model is returned asynchronously in onLoad to support async fetching of the loaders.
See load for documentation on what the onLoad function is passed.
Override-able Methods
ModelLoader.getLoader(loaderName, manager, loadercb)
Function used to return an instance of a particular loader. Once the loader has been created, pass it into loadercb. See above code snippet for an example.
Members
ModelLoader.loaderClasses
Object with a map of loader name to loader class to instantiate. Used only for the default implementation of the getLoader function. Defaults to the available THREE object where loaders are typically available.
ModeLoader.loaderMap
List of extension to loaderName, used to select the loader for each extension. The list can be modified by adding and removing keys from the list. Every loader is expected to be found on the THREE object.
loader.loadMap[ 'obj' ] = 'OBJLoader';
delete loader.loadMap[ 'stl' ];model-viewer Element
<!-- Register the Element -->
<script href=".../model-viewer-element.js" />
<script>customElements.define('model-viewer', ModelViewer)</script>
<body>
<model-viewer src=".../path/to/model.ply" display-shadow ambient-color="red"></model-viewer>
</body>Attributes
src
The url of the model to display.
display-shadow
Whether or not the render the shadow under the robot.
ambient-color
The color of the ambient light specified with css colors.
show-grid
Show a grid underneath the model.
auto-redraw
Automatically redraw the model every frame instead of waiting to be dirtied.
Functions
redraw()
Dirty the renderer so the element will redraw next frame.
Events
'model-change'
Fires when a model is going to load.
'model-loaded'
Fires when all the geometry has been fully loaded.
'error'
Fires when there's a problem loading the model.
Running the Example
Install Node.js and NPM.
Run npm install.
Run npm run server.
Visit localhost:9080/example/ to view the page.