Visualizing Time-varying Three-dimensional Flow Fields Using Accelerated Uflic
نویسندگان
چکیده
Most texture-based 3D flow visualization techniques such as volume Line Integral Convolution (LIC) are limited to steady fields. Time-varying dense volume flow visualization is still an open problem due to intensive computation, demanding temporal-spatial coherence, and ad-hoc volume rendering. Our work is based on an enhanced Unsteady Flow LIC (UFLIC) algorithm, Accelerated UFLIC (AUFLIC), which uses a flow-driven seeding strategy and a dynamic seeding controller to reuse pathlines in the value scattering process to achieve fast time-dependent flow visualization. We first extend AUFLIC to time-varying volume flow fields for accelerated texture generation. To address occlusion, lack of depth cueing, and poor perception of flow directions within a dense volumetric texture, we employ a magnitude-based color-opacity mapping scheme in ray casting to clearly show flow structures in each frame and the flow evolution by means of a smooth animation.
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