Tracing an image is an easy (and thus common) way to create a floorplan in SketchUp and then turn that plan into a 3D model. You can also trace an image to model a 2D design that you want to place somewhere in a 3D model. Whatever you’re trying to model, here’s how to start tracing an image:追踪图像是在SketchUp中创建平面图并将其转换为3D模型的一种简单（因此也是常见的）方法。您还可以跟踪图像以对要放置在3D模型中的某个位置的2D设计进行建模。无论你想建模什么，以下是如何开始追踪图像的方法：
Import your image into SketchUp by selecting File > Import. Then navigate to and select the image you want to import. If you don't see the image you're looking for, make sure the correct file type is selected (such as JPG or PNG).通过选择“文件”>“导入”将图像导入SketchUp。然后导航到并选择要导入的图像。如果您没有看到要查找的图像，请确保选择了正确的文件类型（如JPG或PNG）。
Tip:Alternately, you can also drag and drop importable files into the drawing area. After you drop the file, click and drag the scaling handles to size the image on the ground plane.或者，您也可以将可导入的文件拖放到绘图区域中。拖放文件后，单击并拖动缩放控制柄以调整地平面上的图像大小。
In the Use Image As area, make sure the Image radio button is selected and click Import.在“将图像用作”区域中，确保已选中“图像”单选按钮，然后单击“导入”。
Click where you want to place the top-left corner of the image, and click again to place the lower-right corner, which scales the image.单击要放置图像左上角的位置，然后再次单击以放置缩放图像的右下角。
(Optional) Select Camera > Standard Views > Top to get a top view of your image. If you choose this step, also be sure to switch to Parallel Projection as well.（可选）选择“相机”>“标准视图”>“顶部”以获取图像的俯视图。如果选择此步骤，也一定要切换到平行投影。
Select a drawing tool to start tracing the image. The Line tool is a popular choice.选择绘图工具开始跟踪图像。“直线”工具是一种流行的选择。
If precision is important to you, use a line in your model to scale the drawing.如果精度对您很重要，请在模型中使用一条线来缩放图形。
In the following video, you see two examples of tracking an image to create a floorplan. The first example is a napkin sketch; the second is a drawing plan with precise measurements.在下面的视频中，您将看到两个跟踪图像以创建平面图的示例。第一个例子是餐巾素描；第二个是精确测量的图纸。