最近刚接触VTK，有个需求需要再三维中渲染中文的字符，开始用 vtkVectorText 将给定的文本字符串转换为vtkPolyData的多边形模型来绘制，但是最后渲染出来的结果中，中文字符无法识别，不显示。查阅官方文档

vtkVectorText generates vtkPolyData from an input text string. Besides the ASCII alphanumeric characters a-z, A-Z, 0-9, vtkVectorText also supports ASCII punctuation marks. (The supported ASCII character set are the codes (33-126) inclusive.) The only control character supported is the line feed character “\n”, which advances to a new line.

简单的讲就是支持 常见的数字(0-9)，字母