Posts tagged tessellation evaluation shader
I’ve chosen the title based on the popular article that tries to prove that OpenGL lost the war against Direct3D. To be honest, I didn’t really like the article at all. First, because it compared OpenGL 3 which targeted Shader Model 4.0 hardware and DirectX 11 which targeted Shader Model 5.0 hardware. Besides that, as we will see, the war is really far from over… This article aims to list the most important features introduced by OpenGL 3.x, OpenGL 4.x, Direct3D 10, Direct3D 11 and we will also talk about the promised features of the upcoming Direct3D 11.1 to be fair with DirectX
With the introduction of Shader Model 5.0 hardware and the API support provided by OpenGL 4.0 made GPU based geometry tessellation a first class citizen in the latest graphics applications. While the official support from all the commodity graphics card vendors and the relevant APIs are quite recent news, little to no people know that hardware tessellation has a long history in the world of consumer graphics cards. In this article I would like to present a brief introduction to tessellation and discuss about its evolution that resulted in what we can see in the latest technology demos and game titles.
The Khronos Group continues the progress of streamlining the OpenGL API. One very important step in this battle has been made just a few days ago by releasing two concurrent core releases of the OpenGL specification, namely version 3.3 and 4.0. This is a major update of the standard containing many revolutionary additions to the tool-set of OpenGL that need careful examination. In this article I would like to talk about these new features trying to point out their importance and touching also some practical use case scenarios.