


How to use Three.js to achieve the linkage highlighting of three-dimensional models and CAD drawings?
Apr 04, 2025 pm 01:42 PMThree.js realizes the linkage of three-dimensional models and CAD drawings and highlighting
This article discusses how to use Three.js to achieve the linkage highlighting of three-dimensional models and CAD drawings, that is, click on the specific structure of the three-dimensional model to highlight the corresponding elements in the CAD drawings in real time. Currently, the three-dimensional model display has been completed based on Three.js, and the next step is to solve the CAD drawing display and linkage mechanism.
Solution breakdown:
1. CAD drawing display plan: It is crucial to choose the right CAD drawing display plan, and it must take into account the linkage with Three.js. The following options may be considered:
- Web-based CAD viewers: Many online CAD viewers support web page embedding and provide JavaScript API. Select the appropriate viewer and use its API to obtain drawing element information (such as ID, coordinates, etc.).
- CAD drawing format conversion: Convert CAD drawings (DXF or DWG) to more easily processed formats such as SVG or JSON. This requires additional conversion tools but provides finer control and performance optimization. The converted data must contain the coordinates and related information of each element for association and highlighting.
2. Establish the correlation between the model and the drawing elements: this is the core of the linkage implementation. It is necessary to establish a mapping relationship between the three-dimensional model structure and the elements of the CAD drawing. This usually requires a data file (such as a JSON file) to define this association, which contains the 3D model structure ID and its corresponding CAD drawing element ID.
3. Highlighting implementation: After establishing an association, when clicking on the three-dimensional model structure, find the corresponding CAD drawing elements according to the mapping relationship, and highlight them using the CAD viewer's API or custom method. This requires JavaScript to process click events and update the display status of the CAD drawing based on the associated information.
4. Three.js and CAD viewer integration: Finally, integrating the three-dimensional model rendered by Three.js and the selected CAD viewer into the same page requires careful consideration of the page layout and the interaction between the two.
Summary: Through the above steps, the three-dimensional model and CAD drawings can be highlighted in a coordinated manner. The specific implementation method depends on the selected CAD viewer or drawing format and needs to be adjusted according to actual conditions. Efficient data structure design and search algorithms are crucial to performance.
The above is the detailed content of How to use Three.js to achieve the linkage highlighting of three-dimensional models and CAD drawings?. For more information, please follow other related articles on the PHP Chinese website!

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