-- ScreenSpace -> WorldSpace. Taking a screen width that you want that object to be
-- and a world width that is the size of that object, and returning the position to
-- put that object at to satisfy those.

function ScreenSpace.ScreenToWorldByWidth(x, y, screenWidth, worldWidth)
	local aspectRatio = ScreenSpace.AspectRatio()
	local hfactor = math.tan(math.rad(workspace.CurrentCamera.FieldOfView)/2)
	local wfactor = aspectRatio*hfactor
	local sx, sy = ScreenSpace.ViewSizeX(), ScreenSpace.ViewSizeY()
	--
	local depth = - (sx * worldWidth) / (screenWidth * 2 * wfactor)
	--
	local xf, yf = x/sx*2 - 1, y/sy*2 - 1
	local xpos = xf * -wfactor * depth
	local ypos = yf *  hfactor * depth
	--
	return Vector3.new(xpos, ypos, depth)
end

return ScreenSpace



