@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 {Component} from '../Component.js';
import {Mesh} from "../mesh/Mesh.js";
import {Node} from "../nodes/Node.js";
import {PhongMaterial, Texture} from "../materials/index.js";
import {buildPlaneGeometry, ReadableGeometry} from "../geometry/index.js";
import {math} from "../math/math.js";
/**
* A plane-shaped 3D object containing a bitmap image.
*
* * Creates a 3D quad containing our bitmap, located and oriented using ````pos````, ````normal```` and ````up```` vectors.
* * Registered by {@link Bitmap#id} in {@link Scene#bitmaps}.
* * {@link BCFViewpointsPlugin} will save and load Bitmaps in BCF viewpoints.
*
* ## Usage
*
* In the example below, we'll load the Schependomlaan model, then use
* an ````Bitmap```` to show a storey plan next to the model.
*
* [<img src="http://xeokit.github.io/xeokit-sdk/assets/images/Bitmap_storeyPlan.png">](https://xeokit.github.io/xeokit-sdk/examples/scenegraph/#ImagePlane_imageInSectionPlane)
*
* [[Run this example](https://xeokit.github.io/xeokit-sdk/examples/scenegraph/#ImagePlane_imageInSectionPlane)]
*
* ````javascript
* import {Viewer, Bitmap, XKTLoaderPlugin} from "xeokit-sdk.es.js";
*
* const viewer = new Viewer({
* canvasId: "myCanvas",
* transparent: true
* });
*
* viewer.camera.eye = [-24.65, 21.69, 8.16];
* viewer.camera.look = [-14.62, 2.16, -1.38];
* viewer.camera.up = [0.59, 0.57, -0.56];
*
* const xktLoader = new XKTLoaderPlugin(viewer);
*
* xktLoader.load({
* id: "myModel",
* src: "./models/xkt/Schependomlaan.xkt",
* edges: true
* });
*
* new Bitmap(viewer.scene, {
* src: "./images/schependomlaanPlanView.png",
* visible: true, // Show the Bitmap
* height: 24.0, // Height of Bitmap
* pos: [-15, 0, -10], // World-space position of Bitmap's center
* normal: [0, -1, 0], // Vector perpendicular to Bitmap
* up: [0, 0, 1], // Direction of Bitmap "up"
* collidable: false, // Bitmap does not contribute to Scene boundary
* clippable: true, // Bitmap can be clipped by SectionPlanes
* pickable: true // Allow the ground plane to be picked
* });
* ````
*/
class Bitmap extends Component {
/**
* Creates a new Bitmap.
*
* Registers the Bitmap in {@link Scene#bitmaps}; causes Scene to fire a "bitmapCreated" event.
*
* @constructor
* @param {Component} [owner] Owner component. When destroyed, the owner will destroy this ````Bitmap```` as well.
* @param {*} [cfg] ````Bitmap```` configuration
* @param {String} [cfg.id] Optional ID, unique among all components in the parent {@link Scene}, generated automatically when omitted.
* @param {Boolean} [cfg.visible=true] Indicates whether or not this ````Bitmap```` is visible.
* @param {Number[]} [cfg.pos=[0,0,0]] World-space position of the ````Bitmap````.
* @param {Number[]} [cfg.normal=[0,0,1]] Normal vector indicating the direction the ````Bitmap```` faces.
* @param {Number[]} [cfg.up=[0,1,0]] Direction of "up" for the ````Bitmap````.
* @param {Number[]} [cfg.height=1] World-space height of the ````Bitmap````.
* @param {Number[]} [cfg.matrix=[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1]] Modelling transform matrix for the ````Bitmap````. Overrides the ````position````, ````height```, ````rotation```` and ````normal```` parameters.
* @param {Boolean} [cfg.collidable=true] Indicates if the ````Bitmap```` is initially included in boundary calculations.
* @param {Boolean} [cfg.clippable=true] Indicates if the ````Bitmap```` is initially clippable.
* @param {Boolean} [cfg.pickable=true] Indicates if the ````Bitmap```` is initially pickable.
* @param {Number} [cfg.opacity=1.0] ````Bitmap````'s initial opacity factor, multiplies by the rendered fragment alpha.
* @param {String} [cfg.src] URL of image. Accepted file types are PNG and JPEG.
* @param {HTMLImageElement} [cfg.image] An ````HTMLImageElement```` to source the image from. Overrides ````src````.
* @param {String} [cfg.imageData] Image data as a base64 encoded string.
* @param {String} [cfg.type="jpg"] Image MIME type. Accepted values are "jpg" and "png". Default is "jpg". Normally only needed with ````image```` or ````imageData````. Automatically inferred from file extension of ````src````, if the file has a recognized extension.
*/
constructor(owner, cfg = {}) {
super(owner, cfg);
this._type = cfg.type || (cfg.src ? cfg.src.split('.').pop() : null) || "jpg";
this._pos = math.vec3(cfg.pos || [0, 0, 0]);
this._up = math.vec3(cfg.up || [0, 1, 0]);
this._normal = math.vec3(cfg.normal || [0, 0, 1]);
this._height = cfg.height || 1.0;
this._origin = math.vec3();
this._rtcPos = math.vec3();
this._imageSize = math.vec2();
this._texture = new Texture(this, {
flipY: true
});
this._image = new Image();
if (this._type !== "jpg" && this._type !== "png") {
this.error(`Unsupported type - defaulting to "jpg"`);
this._type = "jpg";
}
this._node = new Node(this, {
matrix: math.inverseMat4(
math.lookAtMat4v(this._pos, math.subVec3(this._pos, this._normal, math.mat4()),
this._up,
math.mat4())),
children: [
this._bitmapMesh = new Mesh(this, {
scale: [1, 1, 1],
rotation: [-90, 0, 0],
collidable: cfg.collidable,
pickable: cfg.pickable,
opacity: cfg.opacity,
clippable: cfg.clippable,
geometry: new ReadableGeometry(this, buildPlaneGeometry({
center: [0, 0, 0],
xSize: 1,
zSize: 1,
xSegments: 2,
zSegments: 2
})),
material: new PhongMaterial(this, {
diffuse: [0, 0, 0],
ambient: [0, 0, 0],
specular: [0, 0, 0],
diffuseMap: this._texture,
emissiveMap: this._texture,
backfaces: true
})
})
]
});
if (cfg.image) {
this.image = cfg.image;
} else if (cfg.src) {
this.src = cfg.src;
} else if (cfg.imageData) {
this.imageData = cfg.imageData;
}
this.scene._bitmapCreated(this);
}
/**
* Sets if this ````Bitmap```` is visible or not.
*
* Default value is ````true````.
*
* @param {Boolean} visible Set ````true```` to make this ````Bitmap```` visible.
*/
set visible(visible) {
this._bitmapMesh.visible = visible;
}
/**
* Gets if this ````Bitmap```` is visible or not.
*
* Default value is ````true````.
*
* @returns {Boolean} Returns ````true```` if visible.
*/
get visible() {
return this._bitmapMesh.visible;
}
/**
* Sets an ````HTMLImageElement```` to source the image from.
*
* Sets {@link Texture#src} null.
*
* You may also need to set {@link Bitmap#type}, if you want to read the image data with {@link Bitmap#imageData}.
*
* @type {HTMLImageElement}
*/
set image(image) {
this._image = image;
if (this._image) {
this._texture.image = this._image;
this._imageSize[0] = this._image.width;
this._imageSize[1] = this._image.height;
this._updateBitmapMeshScale();
}
}
/**
* Gets the ````HTMLImageElement```` the ````Bitmap````'s image is sourced from, if set.
*
* Returns null if not set.
*
* @type {HTMLImageElement}
*/
get image() {
return this._image;
}
/**
* Sets an image file path that the ````Bitmap````'s image is sourced from.
*
* If the file extension is a recognized MIME type, also sets {@link Bitmap#type} to that MIME type.
*
* Accepted file types are PNG and JPEG.
*
* @type {String}
*/
set src(src) {
if (src) {
this._image.onload = () => {
this._texture.image = this._image;
this._imageSize[0] = this._image.width;
this._imageSize[1] = this._image.height;
this._updateBitmapMeshScale();
};
this._image.src = src;
const ext = src.split('.').pop();
switch (ext) {
case "jpeg":
case "jpg":
this._type = "jpg";
break;
case "png":
this._type = "png";
}
}
}
/**
* Gets the image file path that the ````Bitmap````'s image is sourced from, if set.
*
* Returns null if not set.
*
* @type {String}
*/
get src() {
return this._image.src;
}
/**
* Sets an image file path that the ````Bitmap````'s image is sourced from.
*
* Accepted file types are PNG and JPEG.
*
* Sets {@link Texture#image} null.
*
* You may also need to set {@link Bitmap#type}, if you want to read the image data with {@link Bitmap#imageData}.
*
* @type {String}
*/
set imageData(imageData) {
this._image.onload = () => {
this._texture.image = image;
this._imageSize[0] = image.width;
this._imageSize[1] = image.height;
this._updateBitmapMeshScale();
};
this._image.src = imageData;
}
/**
* Gets the image file path that the ````Bitmap````'s image is sourced from, if set.
*
* Returns null if not set.
*
* @type {String}
*/
get imageData() {
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
canvas.width = this._image.width;
canvas.height = this._image.height;
context.drawImage(this._image, 0, 0);
return canvas.toDataURL(this._type === "jpg" ? 'image/jpeg' : 'image/png');
}
/**
* Sets the MIME type of this Bitmap.
*
* This is used by ````Bitmap```` when getting image data with {@link Bitmap#imageData}.
*
* Supported values are "jpg" and "png",
*
* Default is "jpg".
*
* @type {String}
*/
set type(type) {
type = type || "jpg";
if (type !== "png" || type !== "jpg") {
this.error("Unsupported value for `type` - supported types are `jpg` and `png` - defaulting to `jpg`");
type = "jpg";
}
this._type = type;
}
/**
* Gets the MIME type of this Bitmap.
*
* @type {String}
*/
get type() {
return this._type;
}
/**
* Gets the World-space position of this ````Bitmap````.
*
* Default value is ````[0, 0, 0]````.
*
* @returns {Number[]} Current position.
*/
get pos() {
return this._pos;
}
/**
* Gets the direction of the normal vector that is perpendicular to this ````Bitmap````.
*
* @returns {Number[]} value Current normal direction.
*/
get normal() {
return this._normal;
}
/**
* Gets the "up" direction of this ````Bitmap````.
*
* @returns {Number[]} value Current "up" direction.
*/
get up() {
return this._up;
}
/**
* Sets the World-space height of the ````Bitmap````.
*
* Default value is ````1.0````.
*
* @param {Number} height New World-space height of the ````Bitmap````.
*/
set height(height) {
this._height = (height === undefined || height === null) ? 1.0 : height;
if (this._image) {
this._updateBitmapMeshScale();
}
}
/**
* Gets the World-space height of the ````Bitmap````.
*
* Returns {Number} World-space height of the ````Bitmap````.
*/
get height() {
return this._height;
}
/**
* Sets if this ````Bitmap```` is included in boundary calculations.
*
* Default is ````true````.
*
* @type {Boolean}
*/
set collidable(value) {
this._bitmapMesh.collidable = (value !== false);
}
/**
* Gets if this ````Bitmap```` is included in boundary calculations.
*
* Default is ````true````.
*
* @type {Boolean}
*/
get collidable() {
return this._bitmapMesh.collidable;
}
/**
* Sets if this ````Bitmap```` is clippable.
*
* Clipping is done by the {@link SectionPlane}s in {@link Scene#sectionPlanes}.
*
* Default is ````true````.
*
* @type {Boolean}
*/
set clippable(value) {
this._bitmapMesh.clippable = (value !== false);
}
/**
* Gets if this ````Bitmap```` is clippable.
*
* Clipping is done by the {@link SectionPlane}s in {@link Scene#sectionPlanes}.
*
* Default is ````true````.
*
* @type {Boolean}
*/
get clippable() {
return this._bitmapMesh.clippable;
}
/**
* Sets if this ````Bitmap```` is pickable.
*
* Default is ````true````.
*
* @type {Boolean}
*/
set pickable(value) {
this._bitmapMesh.pickable = (value !== false);
}
/**
* Gets if this ````Bitmap```` is pickable.
*
* Default is ````true````.
*
* @type {Boolean}
*/
get pickable() {
return this._bitmapMesh.pickable;
}
/**
* Sets the opacity factor for this ````Bitmap````.
*
* This is a factor in range ````[0..1]```` which multiplies by the rendered fragment alphas.
*
* @type {Number}
*/
set opacity(opacity) {
this._bitmapMesh.opacity = opacity;
}
/**
* Gets this ````Bitmap````'s opacity factor.
*
* This is a factor in range ````[0..1]```` which multiplies by the rendered fragment alphas.
*
* @type {Number}
*/
get opacity() {
return this._bitmapMesh.opacity;
}
/**
* Destroys this ````Bitmap````.
*
* Removes the ```Bitmap```` from {@link Scene#bitmaps}; causes Scene to fire a "bitmapDestroyed" event.
*/
destroy() {
super.destroy();
this.scene._bitmapDestroyed(this);
}
_updateBitmapMeshScale() {
const aspect = this._imageSize[1] / this._imageSize[0];
this._bitmapMesh.scale = [this._height / aspect, 1.0, this._height];
}
}
export {Bitmap};