T&L(Transform & lighting,是指坐標轉換光源

3D圖形是由複雜的坐標轉換和光源運算組成的,當顯卡還沒有T&L功能時,坐標處理和光源運行都是由CPU來處理的,CPU運算速度越快,遊戲越流暢。當圖形晶片具有T&L功能之後,CPU就得以從繁重的運算中解脫出來。

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