For a cone, start at the character and extend X spaces outward. The cone can be up to X spaces wide at the farthest edge (you can make it narrower than X, but not wider).
For a line, starting from the character, extend the area up to X spaces in a single direction (you can make it shorter, but not longer), and 1 space wide. If a space is at least halfway covered by the cone or line, it is included in the effect.
