Category 是一种逻辑分组,其中包含属于该分组的所有命令。这主要用于“继承”渲染状态。例如,您的着色器可能有多个子着色器,并且其中每个子着色器都需要关闭雾效、将混合设置为附加等,便可为此使用 Category:
Shader "example" {
Category {
Fog { Mode Off }
Blend One One
SubShader {
// ...
}
SubShader {
// ...
}
// ...
}
}
Category 代码块仅影响着色器解析,效果完全等同于将 Category 中设置的任意状态“粘贴”到 Category 下面的所有代码块中。这完全不会影响着色器执行速度。
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