createScene.js

import { Cartesian2 } from '../Source/Cesium.js';
import { clone } from '../Source/Cesium.js';
import { defaultValue } from '../Source/Cesium.js';
import { defined } from '../Source/Cesium.js';
import { Scene } from '../Source/Cesium.js';
import createCanvas from './createCanvas.js';
import getWebGLStub from './getWebGLStub.js';

    function createScene(options) {
        options = defaultValue(options, {});

        // save the canvas so we don't try to clone an HTMLCanvasElement
        var canvas = defined(options.canvas) ? options.canvas : createCanvas();
        options.canvas = undefined;

        options = clone(options, true);

        options.canvas = canvas;
        options.contextOptions = defaultValue(options.contextOptions, {});

        var contextOptions = options.contextOptions;
        contextOptions.webgl = defaultValue(contextOptions.webgl, {});
        contextOptions.webgl.antialias = defaultValue(contextOptions.webgl.antialias, false);
        contextOptions.webgl.stencil = defaultValue(contextOptions.webgl.stencil, true);
        if (!!window.webglStub) {
            contextOptions.getWebGLStub = getWebGLStub;
        }

        var scene = new Scene(options);
        scene.highDynamicRange = false;

        if (!!window.webglValidation) {
            var context = scene.context;
            context.validateShaderProgram = true;
            context.validateFramebuffer = true;
            context.logShaderCompilation = true;
            context.throwOnWebGLError = true;
        }

        // Add functions for test
        scene.destroyForSpecs = function() {
            var canvas = this.canvas;
            this.destroy();
            document.body.removeChild(canvas);
        };

        scene.renderForSpecs = function(time) {
            this.initializeFrame();
            this.render(time);
        };

        scene.pickForSpecs = function() {
            this.pick(new Cartesian2(0, 0));
        };

        scene.rethrowRenderErrors = defaultValue(options.rethrowRenderErrors, true);

        return scene;
    }
export default createScene;