Visualization Toolkit-Based Computer Graphics Implementation for High-Frequency Electromagnetic Scattering Analysis

Based on the principles of computer graphics, this paper innovatively applies the Visualization Toolkit (VTK) to the electromagnetic characteristic calculation of electrically large metallic targets. For complex triangular mesh targets, shadow region elimination constitutes a critical step in high-frequency algorithms. Through pipeline operations of VTK, this study achieves efficient geometric modeling of targets and illuminated area mesh selection. Combined with the large-facet integration method based on Physical Optics (PO), a rapid electromagnetic scattering algorithm is established. This approach enables multifrequency calculations using the same mesh model, significantly reducing the computational burden of repeated meshing processes. Experimental comparisons with conventional algorithms demonstrate the effectiveness of this technique for electromagnetic scattering analysis of electrically large-scale targets.