2017年8月
类的功能层次结构
父类具有基本功能
在子类中增加新的功能
类的实现层次结构
父类通过声明抽象方法来定义接口
子类通过实现具体方法来实现接口
What is different between the UI Panel and the UI Image are the details of their properties.
3D models are, essentially, a collection of 3D coordinates called vertices. They are connected together to make triangles. Each vertex can contain few other informations, such as a colour, the direction it points towards (called normal) and some coordinates to map textures onto it (called UV data).
Models cannot be rendered without a material. Materials are wrappers which contain a shader and the values for its properties. Hence, different materials can share the same shader, feeding it with different data.
