Method for calculating texture coordinates of newly-generated model vertex obtained after tissue cutting

Abstract

The invention discloses a method for calculating texture coordinates of a newly-generated model vertex obtained after tissue cutting. The method is characterized by comprising the following steps that index numbers of all triangular patches including cutting path points are recorded; whether the newly-generated model vertex is located in a certain triangular patch or not is judged, wherein whether the newly-generated model vertex is located in the recorded triangular patches or not is judged through traversal, and the index number of the corresponding triangular patch is recorded; the relationship between the newly-generated model vertex and a vertex of the triangle where the newly-generated model vertex is located is calculated, if the model vertex is located in the triangle, the relationship between the vertex of the triangle and the newly-generated vertex is calculated, and if the model vertex is not located in the recorded triangular patches, the relationship between the model vertex and the vertex of the triangle is calculated through projection points of the points in the plane; the relationship between the texture coordinates of the newly-generated model vertex and the texture coordinates of the vertex of the corresponding triangular patch is calculated, and then the texture coordinates of the model vertex can be calculated. Accordingly, the method for calculating the relationship between the texture coordinates of the newly-generated model vertex and the texture coordinates of the vertex of the corresponding triangular patch is adopted, the texture coordinates of the new model vertex can not need to be solved according to a certain texture mapping relationship, therefore, the texture mapping relationship can be ignored, and meanwhile the accuracy of the texture coordinates and the distortion-free texture effect are guaranteed.

Description

technical field [0001] The invention relates to the fields of computer graphics and the like, especially the field of biological tissue and organ texture mapping in virtual surgery. Background technique [0002] In the virtual surgery scene, in order to establish a real visual feedback system, in addition to correctly and realistically modeling the organ model, it is also necessary to enrich its performance characteristics through various texture details of human organs. Cutting is an essential part of surgical procedures. Cutting will change the triangle network of the model, and a part of the faces will be removed along the cutting path and new vertices will be generated to form a new triangle network. This cutting process will cause the newly generated vertices to have no texture coordinates, causing the parts around the cut to have no texture and lose the sense of reality. [0003] The texture coordinates of the model in virtual surgery are generated through several di...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the existing virtual surgery cannot calculate the texture coordinates of the vertices of the newly generated model through a certain texture mapping relationship, the present invention provides a method for calculating the texture coordinates of the vertices of the newly generated model after tissue cutting. After the cutting operation, the texture near the incision is not distorted, distorted, or overlapped to achieve better visual feedback. For the newly generated model vertices during cutting, the original texture around the incision can be quickly and basically reproduced

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