1. [20] How does the incremental z-buffer algorithm work? What is the new value for depth when x changes (x-x and x2=x+A) and we are on the same scanline? What is the new value for depth when x changes (x13x and x23x+/M) and we are on a different scanline? y+1 1. [20] How does the incremental z-buffer algorithm work? What is the new value for depth when x changes (x-x and x2=x+A) and we are on the same scanline? What is the new value for depth when x changes (x13x and x23x+/M) and we are on a different scanline? y+1