Network-Based Interactive Rendering of Large-Scale Process Plant Models

The performance of current network-based remote rendering systems relies on the bandwidth and latency of the network during visualization.In order to gain high frame rates, they need time consuming preprocessing and additional storage.Design review has practical requirements on the preprocessing time, frame rates and visual fidelity.In this paper, a network-based interactive out-of-core rendering system for large-scale process plant models was proposed.First, the model's geometry parameters and topology information are transmitted from the server before visualization.Then the model's out-of-core representation is organized and computed locally according to the model feature.By analyzing the content and motion characteristic of the reviewer, a novel visibility-based pre-fetching technique is presented.It takes into account the reviewer's motion characteristic.No triangles are transmitted during visualization.The algorithm can be implemented on a general PC over the network.It can preprocess a 21-million-triangles model within 5 minutes and achieve 30 fps smooth frame rates on average without sacrificing the image quality.Experimental results show that the rendering performance doesn't depend on the network's bandwidth and latency.