几何着色器的输入图元的类型是图元组装步骤的一个子集。

The input primitives for geometry shaders are the output primitives from a subset of the primitive Assembly process.

youdao

所以当你将三角形带作为一个单独的图元输送给几何着色器时，它会将其视作若干个三角形。

So if you send a triangle strip as a single primitive, what the geometry shader will see is a series of triangles.

youdao

如果启用了细分或几何着色器，那么一个限制级的图元组装过程就会在那些顶点处理阶段之前执行。

If tessellation or geometry shaders are active, then a limited form of primitive assembly is executed before these Vertex Processing stages.

youdao