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1. 分为以下几类:
(1) data classes: 用来访问scene中的geometry 和 shaders
(2)scene override: 主要是用户自定义的drawing 、shading和effects
(3)Rendering overrides: custom rendering, multi-pass effects, and filtering.
(4)Frameword classes:the objects that provide services and device state information to plug-ins.
2. data classes: 描述可以被渲染的几何体,被shapes用来描绘。。。。绕晕了。
shape和shade和handshake:
(1)The shape is queried for the list of render items it needs to render(including multiple material sub-geometries, wireframe selection, component display, etc).
(2)The shader is queried for its geometry requirements .
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原文地址:http://www.cnblogs.com/bubbler/p/5185974.html