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首页> 外文期刊>IEEE transactions on visualization and computer graphics >High-Quality and Interactive Animations of 3D Time-Varying Vector Fields
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High-Quality and Interactive Animations of 3D Time-Varying Vector Fields

机译：3D时变矢量场的高质量和交互式动画

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In this paper, we present an interactive texture-based method for visualizing three-dimensional unsteady vector fields. The visualization method uses a sparse and global representation of the flow, such that it does not suffer from the same perceptual issues as is the case for visualizing dense representations. The animation is made by injecting a collection of particles evenly distributed throughout the physical domain. These particles are then tracked along their path lines. At each time step, these particles are used as seed points to generate field lines using any vector field such as the velocity field or vorticity field. In this way, the animation shows the advection of particles while each frame in the animation shows the instantaneous vector field. In order to maintain a coherent particle density and to avoid clustering as time passes, we have developed a novel particle advection strategy which produces approximately evenly-spaced field lines at each time step. To improve rendering performance, we decouple the rendering stage from the preceding stages of the visualization method. This allows interactive exploration of multiple fields simultaneously, which sets the stage for a more complete analysis of the flow field. The final display is rendered using texture-based direct volume rendering
机译：在本文中，我们提出了一种基于交互纹理的可视化三维非恒定矢量场的方法。可视化方法使用流的稀疏和全局表示，因此它不会像可视化密集表示那样遭受相同的感知问题。通过注入在整个物理域中均匀分布的粒子集合来制作动画。然后沿着它们的路径线跟踪这些粒子。在每个时间步长，这些粒子都用作种子点，以使用任何矢量场（例如速度场或涡度场）生成场线。通过这种方式，动画显示了粒子的对流，而动画中的每一帧都显示了瞬时矢量场。为了保持一致的粒子密度并避免随着时间的流逝而聚集，我们开发了一种新颖的粒子对流策略，该策略在每个时间步产生近似均匀间隔的场线。为了提高渲染性能，我们将渲染阶段与可视化方法的先前阶段分离。这样就可以同时进行多个场的交互式勘探，从而为流场的更完整分析奠定了基础。使用基于纹理的直接体积渲染来渲染最终显示

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