Real-Time Rendering——5.4 Aliasing and Antialiasing 锯齿和抗锯齿 5.4.1 Sampling and Filtering Theory采样和过滤理论
Imaginealargeblacktrianglemovingslowlyacrossawhitebackground.Asascreengridcelliscoveredbythetriangle,thepixelvaluerepresentingthiscellshouldsmoothlydropinintensity.Whattypicallyhappensinbasicrenderers