The CPU still had the burden to feed the graphics processor with transformed and lit vertices, triangle gradients for shading and texturing, etc. The first generation was able to draw shaded and textured triangles in hardware.
Graphic processors like the GeForce series are able to perform a certain amount of these tasks. During rasterization the triangle will be shaded and textured. And lastly the triangle needs to be projected to the screen in order to rasterize it. The next step is to light the triangle by taking the transformed vertices and applying a lighting calculation for every light defined in the scene. Each of the three vertices that the triangle is made up of is transformed to its proper view space position. How's each triangle being processed? Each triangle has to be transformed according to its relative position and orientation to the viewer. Why triangles? They are quick to calculate. What do we need to render a three dimensional object as 2D on your monitor? We start off by building some sort of structure that has a surface, that surface is built from triangles. Sorry, that happens when you get a bit excited. Since I've started to ramble on about Shader technology I just realized that some of you do not even have a clue what I'm talking about. Far Cry is a good example, you've seen the reviews and it can definitely make a diffference. The general consensus for developers is to use as low a shader version as possible. Shaders 3.0 will be used only in several critical places where it gives a performance boost or significantly boosts image quality. But any technological advantage is always welcome and preferred over a previous generation's development.
Is it a huge visual advantage over 2.0? No not at all. When DirectX 9 is updated officially we are going to see some decent support for 3.0 Shaders. The step from 2.0 towards 3.0 is a small one and most Shader Model 2.0 games can easily be upgraded towards Model 3.0. If you program or play computer games or even recently attempted to purchase a video card, then you will have no doubt heard the terms "Vertex Shader" and "Pixel Shader". Encode MPEG 1/2 and 4 as well as offer real-time DivX Decode/Encode. Not only that but the NV40 now also can Decode and. Among the features are motion adaptive interlacing, integrated TV-Encoder, HDTV support (720p. And hey, this has the first ever on-chip GPU video encoder. First off, Series 6 is a fully programmable video processor you can actually use it in paint programs or software like Adobe After Effects. Next to being a gaming card, starting with the GeForce Series 6 some high-quality video options become available also.
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