Do a projection of the colors onto the SG's

Solve the set of spherical gaussians based on input set of data

Spectrum Method Definitions

traverse the layout to locate the nearest character to a display position

discard the oldest entry in the undo list

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)

canoncialize the selection so start <= end

find minimum y position if it starts at x1

rects array must be big enough to accommodate all characters in the given ranges

rects array must be big enough to accommodate all characters in the given ranges

check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string

Pass in translated ASCII characters for text input. - with glfw you can get those from the callback set in glfwSetCharCallback() - on Windows you can

TODO: Thickness anti-aliased lines cap are missing their AA fringe.

Computes the approximate integral of an SG over the entire sphere. The error vs. the non-approximate version decreases as sharpeness increases.