three-render-objects
This module offers a convenient way to render ThreeJS objects onto a WebGL canvas, with built-in interaction capabilities:
- hover/click events
- tooltips
- camera movement with animated transitions
- trackball, orbit or fly controls
All the renderer/scene/camera scaffolding is already included and any instance of Object3D can be rendered with minimal setup.
Quick start
import ThreeRenderObjects from 'three-render-objects';
or
var ThreeRenderObjects = require('three-render-objects');
or even
<script src="//unpkg.com/three-render-objects"></script>
then
const myCanvas = ThreeRenderObjects();
myCanvas(<myDOMElement>)
.objects(<myData>);
API reference
Initialisation
ThreeRenderObjects({ configOptions })(<domElement>)
| Config options | Description | Default |
|---|---|---|
| controlType: str | Which type of control to use to control the camera. Choice between trackball, orbit or fly. | trackball |
| rendererConfig: object | Configuration parameters to pass to the ThreeJS WebGLRenderer constructor. | { antialias: true, alpha: true } |
| waitForLoadComplete: boolean | Whether to wait until all the asynchronous loading operations are finished (such as the background image) before rendering the objects in the scene for the first time. | true |
Data input
| Method | Description | Default |
|---|---|---|
| objects([array]) | Getter/setter for the list of objects to render. Each object should be an instance of Object3D. | [] |
Container layout
| Method | Description | Default |
|---|---|---|
| width([px]) | Getter/setter for the canvas width. | <window width> |
| height([px]) | Getter/setter for the canvas height. | <window height> |
| skyRadius([number]) | Radius of the sphere that bounds the scene, in GL units. | 50000 |
| backgroundColor([str]) | Getter/setter for the canvas background color. | #000011 |
| backgroundImageUrl([url]) | Getter/setter for the URL of the image to be used as scene background. If no image is provided, the background color is shown instead. | null |
| onBackgroundImageLoaded([fn]) | Callback function triggered when the background image has finished loading asynchronously and is rendered on the scene. | |
| showNavInfo([boolean]) | Getter/setter for whether to show the navigation controls footer info. | true |
Render control
| Method | Description | Default |
|---|---|---|
| tick() | Re-render all the objects on the canvas. Essentially this method should be called at every frame, and can be used to control the animation ticks. | |
| cameraPosition([{x,y,z}], [lookAt], [ms]) | Getter/setter for the camera position, in terms of x, y, z coordinates. Each of the coordinates is optional, allowing for motion in just some dimensions. The optional second argument can be used to define the direction that the camera should aim at, in terms of an {x,y,z} point in the 3D space at the distance of 1000 away from the camera. The 3rd optional argument defines the duration of the transition (in ms) to animate the camera motion. A value of 0 (default) moves the camera immediately to the final position. |
By default the camera will face the center of the graph at a z distance of 1000. |
| postProcessingComposer([EffectComposer]) | Getter/setter for the postprocessing composer. If an effect composer is defined, only the output of this composer is rendered, instead of the regular renderer. |
null |
| renderer() | Access the WebGL renderer object. | |
| camera() | Access the perspective camera object. | |
| scene() | Access the Scene object. | |
| controls() | Access the camera controls object. |
Interaction
| Method | Description | Default |
|---|---|---|
| onClick(fn) | Callback function for object clicks with left mouse button. The object (or null if there's no object under the mouse line of sight) and the event object are included as arguments onClick(object, event). |
- |
| onRightClick(fn) | Callback function for object right-clicks. The object (or null if there's no object under the mouse line of sight) and the event object are included as arguments onRightClick(object, event). |
- |
| onHover(fn) | Callback function for object mouse over events. The object (or null if there's no object under the mouse line of sight) is included as the first argument, and the previous hovered object (or null) as second argument: onHover(obj, prevObj). |
- |
| hoverOrderComparator([fn]) | Getter/setter for the comparator function to use when hovering over multiple objects under the same line of sight. This function can be used to prioritize hovering some objects over others. | By default, hovering priority is based solely on camera proximity (closes object wins). |
| lineHoverPrecision([int]) | Getter/setter for the precision to use when detecting hover events over Line objects. | 1 |
| tooltipContent([str or fn]) | Object accessor function or attribute for label (shown in tooltip). Supports plain text or HTML content. | |
| enablePointerInteraction([boolean]) | Getter/setter for whether to enable the mouse tracking events. This activates an internal tracker of the canvas mouse position and enables the functionality of object hover/click and tooltip labels, at the cost of performance. If you're looking for maximum gain in your render performance it's recommended to switch off this property. | true |
| hoverDuringDrag([boolean]) | Getter/setter for whether to trigger hover events while using the controls via pointer dragging. | false |