@xeokit/xeokit-sdk
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3D BIM IFC Viewer SDK for AEC engineering applications. Open Source JavaScript Toolkit based on pure WebGL for top performance, real-world coordinates and full double precision
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JavaScript
import {Plugin} from "../../viewer/Plugin.js";
/**
* {@link Viewer} plugin that makes interaction smoother with large models, by temporarily switching
* the Viewer to faster, lower-quality rendering modes whenever we interact.
*
* [<img src="https://xeokit.io/img/docs/FastNavPlugin/FastNavPlugin.gif">](https://xeokit.github.io/xeokit-sdk/examples/index.html#performance_FastNavPlugin)
*
* FastNavPlugin works by hiding specified Viewer rendering features, and optionally scaling the Viewer's canvas
* resolution, whenever we interact with the Viewer. Then, once we've finished interacting, FastNavPlugin restores those
* rendering features and the original canvas scale, after a configured delay.
*
* Depending on how we configure FastNavPlugin, we essentially switch to a smooth-rendering low-quality view while
* interacting, then return to the normal higher-quality view after we stop, following an optional delay.
*
* Down-scaling the canvas resolution gives particularly good results. For example, scaling by ````0.5```` means that
* we're rendering a quarter of the pixels while interacting, which can make the Viewer noticeably smoother with big models.
*
* The screen capture above shows FastNavPlugin in action. In this example, whenever we move the Camera or resize the Canvas,
* FastNavPlugin switches off enhanced edges and ambient shadows (SAO), and down-scales the canvas, making it slightly
* blurry. When ````0.5```` seconds passes with no interaction, the plugin shows edges and SAO again, and restores the
* original canvas scale.
*
* # Usage
*
* In the example below, we'll create a {@link Viewer}, add a {@link FastNavPlugin}, then use an {@link XKTLoaderPlugin} to load a model.
*
* Whenever we interact with the Viewer, our FastNavPlugin will:
*
* * hide edges,
* * hide ambient shadows (SAO),
* * hide physically-based materials (switching to non-PBR),
* * hide transparent objects, and
* * scale the canvas resolution by 0.5, causing the GPU to render 75% less pixels.
* <br>
*
* We'll also configure a 0.5 second delay before we transition back to high-quality each time we stop ineracting, so that we're
* not continually flipping between low and high quality as we interact. Since we're only rendering ambient shadows when not interacting, we'll also treat ourselves
* to expensive, high-quality SAO settings, that we wouldn't normally configure for an interactive SAO effect.
*
* * [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/index.html#performance_FastNavPlugin)]
*
* ````javascript
* import {Viewer, XKTLoaderPlugin, FastNavPlugin} from "xeokit-sdk.es.js";
*
* // Create a Viewer with PBR and SAO enabled
*
* const viewer = new Viewer({
* canvasId: "myCanvas",
* transparent: true,
* pbr: true, // Enable physically-based rendering for Viewer
* sao: true // Enable ambient shadows for Viewer
* });
*
* viewer.scene.camera.eye = [-66.26, 105.84, -281.92];
* viewer.scene.camera.look = [42.45, 49.62, -43.59];
* viewer.scene.camera.up = [0.05, 0.95, 0.15];
*
* // Higher-quality SAO settings
*
* viewer.scene.sao.enabled = true;
* viewer.scene.sao.numSamples = 60;
* viewer.scene.sao.kernelRadius = 170;
*
* // Install a FastNavPlugin
*
* new FastNavPlugin(viewer, {
* hideEdges: true, // Don't show edges while we interact (default is true)
* hideSAO: true, // Don't show ambient shadows while we interact (default is true)
* hideColorTexture: true, // No color textures while we interact (default is true)
* hidePBR: true, // No physically-based rendering while we interact (default is true)
* hideTransparentObjects: true, // Hide transparent objects while we interact (default is false)
* scaleCanvasResolution: true, // Scale canvas resolution while we interact (default is false)
* defaultScaleCanvasResolutionFactor: 1.0, // Factor by which we scale canvas resolution when we stop interacting (default is 1.0)
* scaleCanvasResolutionFactor: 0.5, // Factor by which we scale canvas resolution when we interact (default is 0.6)
* delayBeforeRestore: true, // When we stop interacting, delay before restoring normal render (default is true)
* delayBeforeRestoreSeconds: 0.5 // The delay duration, in seconds (default is 0.5)
* });
*
* // Load a BIM model from XKT
*
* const xktLoader = new XKTLoaderPlugin(viewer);
*
* const model = xktLoader.load({
* id: "myModel",
* src: "./models/xkt/HolterTower.xkt",
* sao: true, // Enable ambient shadows for this model
* pbr: true // Enable physically-based rendering for this model
* });
* ````
*
* @class FastNavPlugin
*/
class FastNavPlugin extends Plugin {
/**
* @constructor
* @param {Viewer} viewer The Viewer.
* @param {Object} cfg FastNavPlugin configuration.
* @param {String} [cfg.id="FastNav"] Optional ID for this plugin, so that we can find it within {@link Viewer#plugins}.
* @param {Boolean} [cfg.hideColorTexture=true] Whether to temporarily hide color textures whenever we interact with the Viewer.
* @param {Boolean} [cfg.hidePBR=true] Whether to temporarily hide physically-based rendering (PBR) whenever we interact with the Viewer.
* @param {Boolean} [cfg.hideSAO=true] Whether to temporarily hide scalable ambient occlusion (SAO) whenever we interact with the Viewer.
* @param {Boolean} [cfg.hideEdges=true] Whether to temporarily hide edges whenever we interact with the Viewer.
* @param {Boolean} [cfg.hideTransparentObjects=false] Whether to temporarily hide transparent objects whenever we interact with the Viewer.
* @param {Number} [cfg.scaleCanvasResolution=false] Whether to temporarily down-scale the canvas resolution whenever we interact with the Viewer.
* @param {Number} [cfg.defaultScaleCanvasResolutionFactor=0.6] The factor by which we downscale the canvas resolution whenever we stop interacting with the Viewer.
* @param {Number} [cfg.scaleCanvasResolutionFactor=0.6] The factor by which we downscale the canvas resolution whenever we interact with the Viewer.
* @param {Boolean} [cfg.delayBeforeRestore=true] Whether to temporarily have a delay before restoring normal rendering after we stop interacting with the Viewer.
* @param {Number} [cfg.delayBeforeRestoreSeconds=0.5] Delay in seconds before restoring normal rendering after we stop interacting with the Viewer.
* @param {Function} [cfg.onMoved] Optional callback function fired during moving mode, should return the callback function that will be fired when the interaction stops.
*/
constructor(viewer, cfg = {}) {
super("FastNav", viewer);
this._hideColorTexture = cfg.hideColorTexture !== false;
this._hidePBR = cfg.hidePBR !== false;
this._hideSAO = cfg.hideSAO !== false;
this._hideEdges = cfg.hideEdges !== false;
this._hideTransparentObjects = !!cfg.hideTransparentObjects;
this._scaleCanvasResolution = !!cfg.scaleCanvasResolution;
this._defaultScaleCanvasResolutionFactor = cfg.defaultScaleCanvasResolutionFactor;
this._scaleCanvasResolutionFactor = cfg.scaleCanvasResolutionFactor || 0.6;
this._delayBeforeRestore = (cfg.delayBeforeRestore !== false);
this._delayBeforeRestoreSeconds = cfg.delayBeforeRestoreSeconds || 0.5;
this._onMoved = cfg.onMoved;
this._onStopped = null;
let timer = this._delayBeforeRestoreSeconds * 1000;
let fastMode = false;
const switchToLowQuality = () => {
timer = (this._delayBeforeRestoreSeconds * 1000);
if (!fastMode) {
viewer.scene._renderer.setColorTextureEnabled(!this._hideColorTexture);
viewer.scene._renderer.setPBREnabled(!this._hidePBR);
viewer.scene._renderer.setSAOEnabled(!this._hideSAO);
viewer.scene._renderer.setTransparentEnabled(!this._hideTransparentObjects);
viewer.scene._renderer.setEdgesEnabled(!this._hideEdges);
this._originalCanvasResolutionScale = viewer.scene.canvas.resolutionScale;
if (this._scaleCanvasResolution) {
viewer.scene.canvas.resolutionScale = this._scaleCanvasResolutionFactor;
} else {
viewer.scene.canvas.resolutionScale = this._defaultScaleCanvasResolutionFactor;
}
if (this._onMoved) {
this._onStopped = this._onMoved();
}
fastMode = true;
}
};
const switchToHighQuality = () => {
viewer.scene.canvas.resolutionScale = this._defaultScaleCanvasResolutionFactor || this._originalCanvasResolutionScale || 1.0;
viewer.scene._renderer.setEdgesEnabled(true);
viewer.scene._renderer.setColorTextureEnabled(true);
viewer.scene._renderer.setPBREnabled(true);
viewer.scene._renderer.setSAOEnabled(true);
viewer.scene._renderer.setTransparentEnabled(true);
if (this._onStopped) {
this._onStopped();
}
fastMode = false;
};
this._onCameraMatrix = viewer.scene.camera.on("matrix", switchToLowQuality);
this._onSceneTick = viewer.scene.on("tick", (tickEvent) => {
if (!fastMode) {
return;
}
timer -= tickEvent.deltaTime;
if ((!this._delayBeforeRestore) || timer <= 0) {
switchToHighQuality();
}
});
}
/**
* Gets whether to temporarily hide color textures whenever we interact with the Viewer.
*
* Default is ````true````.
*
* @return {Boolean} ````true```` if hiding color textures.
*/
get hideColorTexture() {
return this._hideColorTexture;
}
/**
* Sets whether to temporarily hide color textures whenever we interact with the Viewer.
*
* Default is ````true````.
*
* @param {Boolean} hideColorTexture ````true```` to hide color textures.
*/
set hideColorTexture(hideColorTexture) {
this._hideColorTexture = hideColorTexture;
}
/**
* Gets whether to temporarily hide physically-based rendering (PBR) whenever we interact with the Viewer.
*
* Default is ````true````.
*
* @return {Boolean} ````true```` if hiding PBR.
*/
get hidePBR() {
return this._hidePBR;
}
/**
* Sets whether to temporarily hide physically-based rendering (PBR) whenever we interact with the Viewer.
*
* Default is ````true````.
*
* @param {Boolean} hidePBR ````true```` to hide PBR.
*/
set hidePBR(hidePBR) {
this._hidePBR = hidePBR;
}
/**
* Gets whether to temporarily hide scalable ambient shadows (SAO) whenever we interact with the Viewer.
*
* Default is ````true````.
*
* @return {Boolean} ````true```` if hiding SAO.
*/
get hideSAO() {
return this._hideSAO;
}
/**
* Sets whether to temporarily hide scalable ambient shadows (SAO) whenever we interact with the Viewer.
*
* Default is ````true````.
*
* @param {Boolean} hideSAO ````true```` to hide SAO.
*/
set hideSAO(hideSAO) {
this._hideSAO = hideSAO;
}
/**
* Gets whether to temporarily hide edges whenever we interact with the Viewer.
*
* Default is ````true````.
*
* @return {Boolean} ````true```` if hiding edges.
*/
get hideEdges() {
return this._hideEdges;
}
/**
* Sets whether to temporarily hide edges whenever we interact with the Viewer.
*
* Default is ````true````.
*
* @param {Boolean} hideEdges ````true```` to hide edges.
*/
set hideEdges(hideEdges) {
this._hideEdges = hideEdges;
}
/**
* Gets whether to temporarily hide transparent objects whenever we interact with the Viewer.
*
* Does not hide X-rayed, selected, highlighted objects.
*
* Default is ````false````.
*
* @return {Boolean} ````true```` if hiding transparent objects.
*/
get hideTransparentObjects() {
return this._hideTransparentObjects
}
/**
* Sets whether to temporarily hide transparent objects whenever we interact with the Viewer.
*
* Does not hide X-rayed, selected, highlighted objects.
*
* Default is ````false````.
*
* @param {Boolean} hideTransparentObjects ````true```` to hide transparent objects.
*/
set hideTransparentObjects(hideTransparentObjects) {
this._hideTransparentObjects = (hideTransparentObjects !== false);
}
/**
* Gets whether to temporarily scale the canvas resolution whenever we interact with the Viewer.
*
* Default is ````false````.
*
* The scaling factor is configured via {@link FastNavPlugin#scaleCanvasResolutionFactor}.
*
* @return {Boolean} ````true```` if scaling the canvas resolution.
*/
get scaleCanvasResolution() {
return this._scaleCanvasResolution;
}
/**
* Sets the factor to which we restore the canvas resolution scale when we stop interacting with the viewer.
*
* Default is ````false````.
*
* The scaling factor is configured via {@link FastNavPlugin#scaleCanvasResolutionFactor}.
*
* @param {Boolean} scaleCanvasResolution ````true```` to scale the canvas resolution.
*/
set scaleCanvasResolution(scaleCanvasResolution) {
this._scaleCanvasResolution = scaleCanvasResolution;
}
/**
* Gets the factor to which we restore the canvas resolution scale when we stop interacting with the viewer.
*
* Default is ````1.0````.
*
* Enable canvas resolution scaling by setting {@link FastNavPlugin#scaleCanvasResolution} ````true````.
*
* @return {Number} Factor by scale canvas resolution when we stop interacting with the viewer.
*/
get defaultScaleCanvasResolutionFactor() {
return this._defaultScaleCanvasResolutionFactor;
}
/**
* Sets the factor to which we restore the canvas resolution scale when we stop interacting with the viewer.
*
* Accepted range is ````[0.0 .. 1.0]````.
*
* Default is ````1.0````.
*
* Enable canvas resolution scaling by setting {@link FastNavPlugin#scaleCanvasResolution} ````true````.
*
* @param {Number} defaultScaleCanvasResolutionFactor Factor by scale canvas resolution when we stop interacting with the viewer.
*/
set defaultScaleCanvasResolutionFactor(defaultScaleCanvasResolutionFactor) {
this._defaultScaleCanvasResolutionFactor = defaultScaleCanvasResolutionFactor;
}
/**
* Gets the factor by which we temporarily scale the canvas resolution when we interact with the viewer.
*
* Default is ````0.6````.
*
* Enable canvas resolution scaling by setting {@link FastNavPlugin#scaleCanvasResolution} ````true````.
*
* @return {Number} Factor by which we scale the canvas resolution.
*/
get scaleCanvasResolutionFactor() {
return this._scaleCanvasResolutionFactor;
}
/**
* Sets the factor by which we temporarily scale the canvas resolution when we interact with the viewer.
*
* Accepted range is ````[0.0 .. 1.0]````.
*
* Default is ````0.6````.
*
* Enable canvas resolution scaling by setting {@link FastNavPlugin#scaleCanvasResolution} ````true````.
*
* @param {Number} scaleCanvasResolutionFactor Factor by which we scale the canvas resolution.
*/
set scaleCanvasResolutionFactor(scaleCanvasResolutionFactor) {
this._scaleCanvasResolutionFactor = scaleCanvasResolutionFactor || 0.6;
}
/**
* Gets whether to have a delay before restoring normal rendering after we stop interacting with the Viewer.
*
* The delay duration is configured via {@link FastNavPlugin#delayBeforeRestoreSeconds}.
*
* Default is ````true````.
*
* @return {Boolean} Whether to have a delay.
*/
get delayBeforeRestore() {
return this._delayBeforeRestore;
}
/**
* Sets whether to have a delay before restoring normal rendering after we stop interacting with the Viewer.
*
* The delay duration is configured via {@link FastNavPlugin#delayBeforeRestoreSeconds}.
*
* Default is ````true````.
*
* @param {Boolean} delayBeforeRestore Whether to have a delay.
*/
set delayBeforeRestore(delayBeforeRestore) {
this._delayBeforeRestore = delayBeforeRestore;
}
/**
* Gets the delay before restoring normal rendering after we stop interacting with the Viewer.
*
* The delay is enabled when {@link FastNavPlugin#delayBeforeRestore} is ````true````.
*
* Default is ````0.5```` seconds.
*
* @return {Number} Delay in seconds.
*/
get delayBeforeRestoreSeconds() {
return this._delayBeforeRestoreSeconds;
}
/**
* Sets the delay before restoring normal rendering after we stop interacting with the Viewer.
*
* The delay is enabled when {@link FastNavPlugin#delayBeforeRestore} is ````true````.
*
* Default is ````0.5```` seconds.
*
* @param {Number} delayBeforeRestoreSeconds Delay in seconds.
*/
set delayBeforeRestoreSeconds(delayBeforeRestoreSeconds) {
this._delayBeforeRestoreSeconds = delayBeforeRestoreSeconds !== null && delayBeforeRestoreSeconds !== undefined ? delayBeforeRestoreSeconds : 0.5;
}
/**
* @private
*/
send(name, value) {
switch (name) {
case "clear":
break;
}
}
/**
* Destroys this plugin.
*/
destroy() {
this.viewer.scene.camera.off(this._onCameraMatrix);
this.viewer.scene.canvas.off(this._onCanvasBoundary);
this.viewer.scene.input.off(this._onSceneMouseDown);
this.viewer.scene.input.off(this._onSceneMouseUp);
this.viewer.scene.input.off(this._onSceneMouseMove);
this.viewer.scene.off(this._onSceneTick);
super.destroy();
}
}
export {FastNavPlugin};