| Summary: | 碩士 === 國立中央大學 === 資訊工程研究所 === 90 ===
The laparoscopic surgical simulation has been a state-of-art topic in these years. One of the most challenging problems in the surgical simulation is the high fidelity of visual effects. In this paper, a computer graphics approach for simulating bleeding effects is proposed. The proposed hybrid liquid representation modeling (HLRM) approach combines traditional particle system with the isosurface representation using the marching cubes algorithm. For improving the performance and visual effects, the HLRM consists of three components: (i) surface tracking method, (ii) fast Fourier transform, and (iii) dynamic particle representation. The surface tracking method is used to classify particles near the liquid surface. Combining with the surface tracking method, the fast Fourier transform algorithm can be used to find the isolated particles. Finally a dynamic particle representation is proposed for saving the computation time of the marching cubes algorithm. It is essential to render the fair blood surface and sprayed blood needed in surgery simulation. HLRM is able to render the liquid surface and isolated particles in real time. Therefore our approach is suitable for bleeding effects in laparoscopic surgery simulation.
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