Generation method for spherical network model

Abstract

The invention discloses a generation method for a spherical network model, comprising the following steps: A. according to the amount of required spherical mesh points, initially generating six rectangular planes with limited mesh points; B. connecting the boundaries of six rectangular mesh point planes to splice one orthogonal hexahedron of which the geometric center is coincident with the sphere center; and C. according to the required spherical radius, taking the geometric center of the hexahedron as the sphere center, and moving each mesh point to the position which has distance between the sphere center as the radius on the direction of the sphere center and the point. The generation method has the beneficial effect that the mesh points of the spherical mesh generated with the methoddescribed by the invention are almost even, space occupation and calculation time are reduced, the realization mode of the generation method is simple, and the spherical mesh is favourable for bringing more ideal subsequent modelling effect by serving as the basic model of the subsequent modelling process. In addition, the method described by the invention is characterized in that the sphere center position, the radius of the sphere surface and the amount of the sphere surface mesh are set as required.

Description

technical field [0001] The invention relates to a method for generating a spherical grid model by computer, in particular to a method for generating an initial uniform spherical grid model suitable for modeling the surface of a cardiac chamber of a catheter, and belongs to the technical field of computer image processing. Background technique [0002] The spherical mesh model has been applied in many fields. The traditional generation methods of the spherical mesh model include the longitude and latitude method, the Bezier surface generation method and so on. The sphere generated by the traditional method based on longitude and latitude lines, the distribution of grid points at low latitudes is too dense, which will cause too much data redundancy, which will make the calculation of the subsequent spherical grid processing too large and the efficiency will decrease. Moreover, the distribution of grid points on the spherical surface is not uniform, and the modeling effect is n...

AI Technical Summary

Problems solved by technology

The sphere generated by the traditional method based on longitude and latitude lines, the distribution of grid points at low latitudes is too dense, which will cause too much data redundancy, which will make the follow-up calculation of the spherical grid processing too large and the efficiency will decrease

And the grid points are unevenly distributed on the spherical surface, and the modeling effect is not ideal

Based on the Bezier surface generation method, the calculation is more complicated and the amount of calculation is large

and the resulting spherical mesh is not uniform

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