@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 {RenderState} from '../webgl/RenderState.js';
import {Texture2D} from '../webgl/Texture2D.js';
import {math} from '../math/math.js';
import {stats} from '../stats.js';
import {
ClampToEdgeWrapping, LinearEncoding,
LinearFilter,
LinearMipMapLinearFilter,
LinearMipMapNearestFilter, MirroredRepeatWrapping, NearestFilter,
NearestMipMapLinearFilter, NearestMipMapNearestFilter, RepeatWrapping, sRGBEncoding
} from "../constants/constants.js";
function ensureImageSizePowerOfTwo(image) {
if (!isPowerOfTwo(image.width) || !isPowerOfTwo(image.height)) {
const canvas = document.createElement("canvas");
canvas.width = nextHighestPowerOfTwo(image.width);
canvas.height = nextHighestPowerOfTwo(image.height);
const ctx = canvas.getContext("2d");
ctx.drawImage(image,
0, 0, image.width, image.height,
0, 0, canvas.width, canvas.height);
image = canvas;
}
return image;
}
function isPowerOfTwo(x) {
return (x & (x - 1)) === 0;
}
function nextHighestPowerOfTwo(x) {
--x;
for (let i = 1; i < 32; i <<= 1) {
x = x | x >> i;
}
return x + 1;
}
/**
* @desc A 2D texture map.
*
* * Textures are attached to {@link Material}s, which are attached to {@link Mesh}es.
* * To create a Texture from an image file, set {@link Texture#src} to the image file path.
* * To create a Texture from an HTMLImageElement, set the Texture's {@link Texture#image} to the HTMLImageElement.
*
* ## Usage
*
* In this example we have a Mesh with a {@link PhongMaterial} which applies diffuse {@link Texture}, and a {@link buildTorusGeometry} which builds a {@link ReadableGeometry}.
*
* Note that xeokit will ignore {@link PhongMaterial#diffuse} and {@link PhongMaterial#specular}, since we override those
* with {@link PhongMaterial#diffuseMap} and {@link PhongMaterial#specularMap}. The {@link Texture} pixel colors directly
* provide the diffuse and specular components for each fragment across the {@link ReadableGeometry} surface.
*
* [[Run this example](/examples/index.html#materials_Texture)]
*
* ```` javascript
* import {Viewer, Mesh, buildTorusGeometry,
* ReadableGeometry, PhongMaterial, Texture} from "xeokit-sdk.es.js";
*
* const viewer = new Viewer({
* canvasId: "myCanvas"
* });
*
* viewer.camera.eye = [0, 0, 5];
* viewer.camera.look = [0, 0, 0];
* viewer.camera.up = [0, 1, 0];
*
* new Mesh(viewer.scene, {
* geometry: new ReadableGeometry(viewer.scene, buildTorusGeometry({
* center: [0, 0, 0],
* radius: 1.5,
* tube: 0.5,
* radialSegments: 32,
* tubeSegments: 24,
* arc: Math.PI * 2.0
* }),
* material: new PhongMaterial(viewer.scene, {
* ambient: [0.9, 0.3, 0.9],
* shininess: 30,
* diffuseMap: new Texture(viewer.scene, {
* src: "textures/diffuse/uvGrid2.jpg"
* })
* })
* });
*````
*/
class Texture extends Component {
/**
@private
*/
get type() {
return "Texture";
}
/**
* @constructor
* @param {Component} owner Owner component. When destroyed, the owner will destroy this Texture as well.
* @param {*} [cfg] Configs
* @param {String} [cfg.id] Optional ID for this Texture, unique among all components in the parent scene, generated automatically when omitted.
* @param {String} [cfg.src=null] Path to image file to load into this Texture. See the {@link Texture#src} property for more info.
* @param {HTMLImageElement} [cfg.image=null] HTML Image object to load into this Texture. See the {@link Texture#image} property for more info.
* @param {Number} [cfg.minFilter=LinearMipmapLinearFilter] How the texture is sampled when a texel covers less than one pixel.
* Supported values are {@link LinearMipmapLinearFilter}, {@link LinearMipMapNearestFilter}, {@link NearestMipMapNearestFilter}, {@link NearestMipMapLinearFilter} and {@link LinearMipMapLinearFilter}.
* @param {Number} [cfg.maxAnisotropy=false] Max anisotropy to use for texture filtering (see EXT_texture_filter_anisotropic).
* @param {Number} [cfg.magFilter=LinearFilter] How the texture is sampled when a texel covers more than one pixel. Supported values are {@link LinearFilter} and {@link NearestFilter}.
* @param {Number} [cfg.wrapS=RepeatWrapping] Wrap parameter for texture coordinate *S*. Supported values are {@link ClampToEdgeWrapping}, {@link MirroredRepeatWrapping} and {@link RepeatWrapping}.
* @param {Number} [cfg.wrapT=RepeatWrapping] Wrap parameter for texture coordinate *T*. Supported values are {@link ClampToEdgeWrapping}, {@link MirroredRepeatWrapping} and {@link RepeatWrapping}..
* @param {Boolean} [cfg.flipY=false] Flips this Texture's source data along its vertical axis when ````true````.
* @param {Number} [cfg.encoding=LinearEncoding] Encoding format. Supported values are {@link LinearEncoding} and {@link sRGBEncoding}.
* @param {Number[]} [cfg.translate=[0,0]] 2D translation vector that will be added to texture's *S* and *T* coordinates.
* @param {Number[]} [cfg.scale=[1,1]] 2D scaling vector that will be applied to texture's *S* and *T* coordinates.
* @param {Number} [cfg.rotate=0] Rotation, in degrees, that will be applied to texture's *S* and *T* coordinates.
*/
constructor(owner, cfg = {}) {
super(owner, cfg);
this._state = new RenderState({
texture: new Texture2D({gl: this.scene.canvas.gl}),
matrix: math.identityMat4(),
hasMatrix: (cfg.translate && (cfg.translate[0] !== 0 || cfg.translate[1] !== 0)) || (!!cfg.rotate) || (cfg.scale && (cfg.scale[0] !== 0 || cfg.scale[1] !== 0)),
maxAnisotropy: cfg.maxAnisotropy,
minFilter: this._checkMinFilter(cfg.minFilter),
magFilter: this._checkMagFilter(cfg.magFilter),
wrapS: this._checkWrapS(cfg.wrapS),
wrapT: this._checkWrapT(cfg.wrapT),
flipY: this._checkFlipY(cfg.flipY),
encoding: this._checkEncoding(cfg.encoding)
});
// Data source
this._src = null;
this._image = null;
// Transformation
this._translate = math.vec2([0, 0]);
this._scale = math.vec2([1, 1]);
this._rotate = math.vec2([0, 0]);
this._matrixDirty = false;
// Transform
this.translate = cfg.translate;
this.scale = cfg.scale;
this.rotate = cfg.rotate;
// Data source
if (cfg.src) {
this.src = cfg.src; // Image file
} else if (cfg.image) {
this.image = cfg.image; // Image object
}
stats.memory.textures++;
}
_checkMinFilter(value) {
value = value || LinearMipMapLinearFilter;
if (value !== LinearFilter &&
value !== LinearMipMapNearestFilter &&
value !== LinearMipMapLinearFilter &&
value !== NearestMipMapLinearFilter &&
value !== NearestMipMapNearestFilter) {
this.error("Unsupported value for 'minFilter' - supported values are LinearFilter, LinearMipMapNearestFilter, NearestMipMapNearestFilter, " +
"NearestMipMapLinearFilter and LinearMipMapLinearFilter. Defaulting to LinearMipMapLinearFilter.");
value = LinearMipMapLinearFilter;
}
return value;
}
_checkMagFilter(value) {
value = value || LinearFilter;
if (value !== LinearFilter && value !== NearestFilter) {
this.error("Unsupported value for 'magFilter' - supported values are LinearFilter and NearestFilter. Defaulting to LinearFilter.");
value = LinearFilter;
}
return value;
}
_checkWrapS(value) {
value = value || RepeatWrapping;
if (value !== ClampToEdgeWrapping && value !== MirroredRepeatWrapping && value !== RepeatWrapping) {
this.error("Unsupported value for 'wrapS' - supported values are ClampToEdgeWrapping, MirroredRepeatWrapping and RepeatWrapping. Defaulting to RepeatWrapping.");
value = RepeatWrapping;
}
return value;
}
_checkWrapT(value) {
value = value || RepeatWrapping;
if (value !== ClampToEdgeWrapping && value !== MirroredRepeatWrapping && value !== RepeatWrapping) {
this.error("Unsupported value for 'wrapT' - supported values are ClampToEdgeWrapping, MirroredRepeatWrapping and RepeatWrapping. Defaulting to RepeatWrapping.");
value = RepeatWrapping;
}
return value;
}
_checkFlipY(value) {
return !!value;
}
_checkEncoding(value) {
value = value || LinearEncoding;
if (value !== LinearEncoding && value !== sRGBEncoding) {
this.error("Unsupported value for 'encoding' - supported values are LinearEncoding and sRGBEncoding. Defaulting to LinearEncoding.");
value = LinearEncoding;
}
return value;
}
_update() {
const state = this._state;
if (this._matrixDirty) {
let matrix;
let t;
if (this._translate[0] !== 0 || this._translate[1] !== 0) {
matrix = math.translationMat4v([this._translate[0], this._translate[1], 0], this._state.matrix);
}
if (this._scale[0] !== 1 || this._scale[1] !== 1) {
t = math.scalingMat4v([this._scale[0], this._scale[1], 1]);
matrix = matrix ? math.mulMat4(matrix, t) : t;
}
if (this._rotate !== 0) {
t = math.rotationMat4v(this._rotate * 0.0174532925, [0, 0, 1]);
matrix = matrix ? math.mulMat4(matrix, t) : t;
}
if (matrix) {
state.matrix = matrix;
}
this._matrixDirty = false;
}
this.glRedraw();
}
/**
* Sets an HTML DOM Image object to source this Texture from.
*
* Sets {@link Texture#src} null.
*
* @type {HTMLImageElement}
*/
set image(value) {
this._image = ensureImageSizePowerOfTwo(value);
this._image.crossOrigin = "Anonymous";
this._state.texture.setImage(this._image, this._state);
this._src = null;
this.glRedraw();
}
/**
* Gets HTML DOM Image object this Texture is sourced from, if any.
*
* Returns null if not set.
*
* @type {HTMLImageElement}
*/
get image() {
return this._image;
}
/**
* Sets path to an image file to source this Texture from.
*
* Sets {@link Texture#image} null.
*
* @type {String}
*/
set src(src) {
this.scene.loading++;
this.scene.canvas.spinner.processes++;
const self = this;
let image = new Image();
image.onload = function () {
image = ensureImageSizePowerOfTwo(image);
self._state.texture.setImage(image, self._state);
self.scene.loading--;
self.glRedraw();
self.scene.canvas.spinner.processes--;
};
image.src = src;
this._src = src;
this._image = null;
}
/**
* Gets path to the image file this Texture from, if any.
*
* Returns null if not set.
*
* @type {String}
*/
get src() {
return this._src;
}
/**
* Sets the 2D translation vector added to this Texture's *S* and *T* UV coordinates.
*
* Default value is ````[0, 0]````.
*
* @type {Number[]}
*/
set translate(value) {
this._translate.set(value || [0, 0]);
this._matrixDirty = true;
this._needUpdate();
}
/**
* Gets the 2D translation vector added to this Texture's *S* and *T* UV coordinates.
*
* Default value is ````[0, 0]````.
*
* @type {Number[]}
*/
get translate() {
return this._translate;
}
/**
* Sets the 2D scaling vector that will be applied to this Texture's *S* and *T* UV coordinates.
*
* Default value is ````[1, 1]````.
*
* @type {Number[]}
*/
set scale(value) {
this._scale.set(value || [1, 1]);
this._matrixDirty = true;
this._needUpdate();
}
/**
* Gets the 2D scaling vector that will be applied to this Texture's *S* and *T* UV coordinates.
*
* Default value is ````[1, 1]````.
*
* @type {Number[]}
*/
get scale() {
return this._scale;
}
/**
* Sets the rotation angles, in degrees, that will be applied to this Texture's *S* and *T* UV coordinates.
*
* Default value is ````0````.
*
* @type {Number}
*/
set rotate(value) {
value = value || 0;
if (this._rotate === value) {
return;
}
this._rotate = value;
this._matrixDirty = true;
this._needUpdate();
}
/**
* Gets the rotation angles, in degrees, that will be applied to this Texture's *S* and *T* UV coordinates.
*
* Default value is ````0````.
*
* @type {Number}
*/
get rotate() {
return this._rotate;
}
/**
* Gets how this Texture is sampled when a texel covers less than one pixel.
*
* Options are:
*
* * NearestFilter - Uses the value of the texture element that is nearest
* (in Manhattan distance) to the center of the pixel being textured.
*
* * LinearFilter - Uses the weighted average of the four texture elements that are
* closest to the center of the pixel being textured.
*
* * NearestMipMapNearestFilter - Chooses the mipmap that most closely matches the
* size of the pixel being textured and uses the "nearest" criterion (the texture
* element nearest to the center of the pixel) to produce a texture value.
*
* * LinearMipMapNearestFilter - Chooses the mipmap that most closely matches the size of
* the pixel being textured and uses the "linear" criterion (a weighted average of the
* four texture elements that are closest to the center of the pixel) to produce a
* texture value.
*
* * NearestMipMapLinearFilter - Chooses the two mipmaps that most closely
* match the size of the pixel being textured and uses the "nearest" criterion
* (the texture element nearest to the center of the pixel) to produce a texture
* value from each mipmap. The final texture value is a weighted average of those two
* values.
*
* * LinearMipMapLinearFilter - (default) - Chooses the two mipmaps that most closely match the size
* of the pixel being textured and uses the "linear" criterion (a weighted average
* of the four texture elements that are closest to the center of the pixel) to
* produce a texture value from each mipmap. The final texture value is a weighted
* average of those two values.
*
* Default value is LinearMipMapLinearFilter.
*
* @type {Number}
*/
get minFilter() {
return this._state.minFilter;
}
/**
* Gets how this Texture is sampled when a texel covers more than one pixel.
*
* * NearestFilter - Uses the value of the texture element that is nearest
* (in Manhattan distance) to the center of the pixel being textured.
* * LinearFilter - (default) - Uses the weighted average of the four texture elements that are
* closest to the center of the pixel being textured.
*
* Default value is LinearMipMapLinearFilter.
*
* @type {Number}
*/
get magFilter() {
return this._state.magFilter;
}
/**
* Gets the wrap parameter for this Texture's *S* coordinate.
*
* Values can be:
*
* * ClampToEdgeWrapping - causes *S* coordinates to be clamped to the size of the texture.
* * MirroredRepeatWrapping - causes the *S* coordinate to be set to the fractional part of the texture coordinate
* if the integer part of *S* is even; if the integer part of *S* is odd, then the *S* texture coordinate is
* set to *1 - frac S* , where *frac S* represents the fractional part of *S*.
* * RepeatWrapping - (default) - causes the integer part of the *S* coordinate to be ignored; xeokit uses only the
* fractional part, thereby creating a repeating pattern.
*
* Default value is RepeatWrapping.
*
* @type {Number}
*/
get wrapS() {
return this._state.wrapS;
}
/**
* Gets the wrap parameter for this Texture's *T* coordinate.
*
* Values can be:
*
* * ClampToEdgeWrapping - causes *S* coordinates to be clamped to the size of the texture.
* * MirroredRepeatWrapping - causes the *S* coordinate to be set to the fractional part of the texture coordinate
* if the integer part of *S* is even; if the integer part of *S* is odd, then the *S* texture coordinate is
* set to *1 - frac S* , where *frac S* represents the fractional part of *S*.
* * RepeatWrapping - (default) - causes the integer part of the *S* coordinate to be ignored; xeokit uses only the
* fractional part, thereby creating a repeating pattern.
*
* Default value is RepeatWrapping.
*
* @type {Number}
*/
get wrapT() {
return this._state.wrapT;
}
/**
* Gets if this Texture's source data is flipped along its vertical axis.
*
* @type {Number}
*/
get flipY() {
return this._state.flipY;
}
/**
* Gets the Texture's encoding format.
*
* @type {Number}
*/
get encoding() {
return this._state.encoding;
}
/**
* Destroys this Texture
*/
destroy() {
super.destroy();
if (this._state.texture) {
this._state.texture.destroy();
}
this._state.destroy();
stats.memory.textures--;
}
}
export {Texture};