使用OpenGL完成的云纹图及文字显示。云纹图支持等值线，支持连续与非连续着色，支持不同值区间的面积运算。全三维，已经过大量测试。-Use OpenGL achieve the moire maps and text. Moire map isogram Supported in support of consecutive and non-continuous shading, support for different values of the area of computing inte