A modeling method of bleeding simulation model in virtual surgery

Abstract

The invention discloses a modeling method for a bleeding simulation model in a virtual operation. The modeling method comprises the steps that 1, a particle system is determined, and the particle system is divided into a grid with the action radius of an SPH method as the side length; 2, particles i are determined, whether the particles i are in the grid or not is judged, and when the particles iare in the grid, adjacent particles of the particle i are determined; 3, the viscosity coefficient and action radius of the particles i are revised to obtain a revised viscosity coefficient and a revised action radius, and the model is built according to the stress, accelerated speed, revised viscosity coefficient and revised action radius of the particles i. According to the modeling method for the bleeding simulation model in the virtual operation, the efficiency of searching adjacent points through the SPH method is improved by using a grid division method; the physical property of the bleeding model is improved, so that the smoothness of the bleeding simulation surface is better, the problem of boundary distortion is solved, the real-time performance and authenticity of the bleeding simulation are improved, and the simulation effect is smoother.

Description

technical field [0001] The invention belongs to the technical field of virtual surgery in virtual reality, in particular to a modeling method of a bleeding simulation model in virtual surgery. Background technique [0002] Virtual reality technology is a virtual world created by computer simulation, which can provide users with a real feeling. Virtual reality technology includes disciplines such as computer graphics, artificial intelligence and mechanics, and realizes the simulation of the environment and perception by simulating vision, hearing and touch. The user uses behavioral actions such as shaking his head and raising his hand as input, and the computer processes and responds, and feeds back to the user's senses. As an important research direction of virtual reality technology, virtual surgery provides an immersive training platform for surgeons, which can train surgeons more safely and efficiently with reduced costs, and avoids using animals as research objects. It ...

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Problems solved by technology

[0005] The second purpose of the present invention is to revise the particle property parameters through the research on the physical properties of bleeding, so that the smoothness of the bleeding simulation surface is better, solve the problem of boundary distortion, and improve the authenticity of bleeding simulation

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