如何使用 Forge Viewer Snapper? [英] How to use Forge Viewer Snapper?

问题描述

我正在尝试使用 Forge Viewer 中的 Snapper 功能来要求用户选择一个点，然后检索所选点的点世界坐标.

I'm trying to use Snapper functionnalities from Forge Viewer in order to ask user to pick a point and then retrieve point world coordinates of selected point.

我查看了这个主题，但对我不起作用:如何激活 Autodesk锻造鲷鱼?

I look at this topic but doesn't work for me : How to activate Autodesk Forge Snapper?

我像这样加载扩展:this.viewer.loadExtension('Autodesk.Snapping');

然后尝试像这样使用 Snapper:

And then try to use the Snapper like that:

               console.log(this._viewer.toolController.getActiveToolName());
               var snapper = new Autodesk.Viewing.Extensions.Snapping.Snapper(this._viewer, {});

               this._viewer.toolController.registerTool(snapper);
               this._viewer.toolController.activateTool('snapper');

               console.log(this._viewer.toolController.getToolNames());
               console.log(this._viewer.toolController.getActiveToolName());

               var a = snapper.getSnapResult();
               console.log(a);

在日志中，快照程序已激活，但我可以在查看器中选择一个点以使用 getSnapResult 函数获取结果.

In the log the snapper is activated but i am enable to pick a point in viewer ann to get results with getSnapResult function.

提前致谢

推荐答案

snapper 工具适用于 2d 和 3d 模型，您需要提供一个命中测试结果，该结果被例如测试为阳性单击画布，这样说:

The snapper tool works with both 2d and 3d models and you will need to provide a hit test result that is tested positive by e.g. a click on the canvas, so say:

const snapper = new Autodesk.Viewing.Extensions.Snapping.Snapper(NOP_VIEWER)
const hitTestResult = NOP_VIEWER.impl.snappingHitTest(clickEvent.x, clickEvent.y)
snapper.snapping3D(hitTestResult)
snapper.getSnapResult()

您可以使用自定义工具订阅画布点击事件 - 请参阅此处了解详情.

You may subscribe to canvas click events with your custom tool - see here for details.

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