Returns a pointer to the underlying zero-terminated array of characters */

Returns the name of the file given the path (extension included)

find the x/y location of a character, and remember info about the previous row in case we get a move-up event (for page up, we'll have to rescan)

delete the section

move cursor to first character of selection

Frustum culls meshes, and produces a buffer of visible mesh indices

delete characters while updating undo

Frustum culls meshes, and produces a buffer of visible mesh indices. Also sorts the indices by depth.

Returns the fractional part of x

Initializes the mesh as a box