A vertex shader consists of two parts: shader function and shader declaration.

顶点着色器包含两个部分：着色器函数和着色器声明。

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Load the program with the expanded interface. Parameter shadowing is enabled (second parameter = TRUE). Ignore vertex shader specifc flags, such as declaration usage.

从高配接口读取程序，参数映射启用，忽略顶点着色器特殊标志，就像使用声明。

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