autodesk-forge中自定义工具栏，自定义图标

官方api地址：

https://forge.autodesk.com/en/docs/viewer/v7/developers_guide/viewer_basics/toolbar-button/

图标库参考：https://getbootstrap.com/docs/3.3/components/

本次需求要自定义图标

引入boost

<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">  
	<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
	<script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
           

扩展js

function ToolbarExtension(viewer, options) {
    Autodesk.Viewing.Extension.call(this, viewer, options);
}

ToolbarExtension.prototype = Object.create(Autodesk.Viewing.Extension.prototype);
ToolbarExtension.prototype.constructor = ToolbarExtension;

ToolbarExtension.prototype.load = function() {
    return true;
};

ToolbarExtension.prototype.unload = function() {
    if (this.subToolbar) {
        this.viewer.toolbar.removeControl(this.subToolbar);
        this.subToolbar = null;
    }
};


ToolbarExtension.prototype.onToolbarCreated = function(toolbar) {
    var viewer = this.viewer;
    // Button 1
    var button1 = new Autodesk.Viewing.UI.Button('show-env-bg-button');
    button1.onClick = function(e) {
        if (intervalBool) {
            clearInterval(interval );
        }else {
            interval = setInterval(zizhuan, 100);
        }
        intervalBool = !intervalBool;
    };
    button1.setIcon('glyphicon')
    button1.icon.classList.add( 'glyphicon-play' );
    button1.setToolTip('自转');

    // Button 2
    var button2 = new Autodesk.Viewing.UI.Button('hide-env-bg-button');
    button2.onClick = function(e) {
        tipsBool = !tipsBool;
    };
    button2.setIcon('glyphicon')
    button2.icon.classList.add( 'glyphicon-eye-open' );
    button2.setToolTip('显示tips');

    // SubToolbar
    this.subToolbar = new Autodesk.Viewing.UI.ControlGroup('my-custom-toolbar');
    this.subToolbar.addControl(button1);
    this.subToolbar.addControl(button2);

    toolbar.addControl(this.subToolbar);
};


Autodesk.Viewing.theExtensionManager.registerExtension('ToolbarExtension', ToolbarExtension);