What are geometry shaders?
Geometry shaders are a new feature of DirectX 10 that allow for dynamic creation of geometry on the GPU. Until now, graphics hardware only had the ability to manipulate existing data on the GPU. With the introduction of geometry shaders, the GPU can now create and destroy vertices output from the vertex shader. This capability allows for new features such as displacement mapping with tessellation and GPU-generated shadow volumes that deliver an even more true-to-life gaming experience.
