Represents a custom vertex format structure that contains position and color information 表示包含位置和颜色信息的自定义顶点格式结构。
2.
The operation procedure is based on the inner interpolating of the position and color of image pixels . they include two stages . one is to establish the corresponding relation of images 其算法一般都是基于图像的像素位置和颜色的内插，具体操作步骤包括：一、建立图像间的对应关系；二、确定插补图像像素的位置和灰度。
