A CDE Definition
(Transformation & Lighting) Moving 3D objects on screen and changing the corresponding lighting effects. Transforming these 3D matrices many times per second as the objects move and recomputing their shadows each time takes an enormous amount of processing. Hardware T&L offloads these functions from the system CPU to the graphics card, which enables a greater number of polygons to be processed to create a more realistic effect. See graphics accelerator.
An early graphics card (display adapter) that performed a specialized set of functions in hardware to render an image on screen. Today, all graphics cards have basic rendering functions built in, and many contain graphics processing units (GPUs) that are programmable, special-purpose processors. They move an image through a pipeline that performs a different graphics function simultaneously at each stage. For more details, see graphics pipeline and GPU.
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