-- ScreenSpace -> WorldSpace. Taking a screen width, and a depth to put an object
-- at, and returning a size of how big that object has to be to appear that size
-- at that depth.

function ScreenSpace.ScreenToWorldByWidthDepth(x, y, screenWidth, depth)
	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 worldWidth = (screenWidth/sx) * 2 * -wfactor * depth
	--
	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), worldWidth
end
