| 摘要 |
A model-based design system couples intelligent 3D model elements with an analytical model that describes fluid flow through the 3D model. The system automatically generates annotation graphics for a 2D view of the elements with respect to a view plane. The system displays a drop symbol when the elements are below the view plane and the system displays a rise symbol when the elements penetrate and rise above the view plane. In addition to the rise/drop indications, the annotation graphics may indicate the type of service provided by the elements and the location and direction of flow. Advantageously, the system generates these annotation graphics automatically from 3D model and the analytical model.
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