So, I have a project in school where I have to make a 2 point perspective drawing and give the equations for all the lines. I would like to make a dashed line(we don't have to but I want to), so I was thinking of how to express that and I was thinking how I would do that programming and would express it as
if ((int[x]<x<int[x]+.2)==true) draw line
However, as I need to write everything in equations how would this be expressed mathematical notation? Would this simply be expressed as a limit?