--- Imports ---


import Goal.Core
import Goal.Geometry


--- Program ---


-- Globals --

mxx = pi
mnx = -pi
mxy = pi
mny = -pi
nstps = 10
npnts = 50

axprms = LinearAxisParams (show . round) 5 5

hlns = [ [ [x,y] | x <- range mnx mxx npnts ] | y <- range mnx mxx nstps ]
vlns = [ [ [x,y] | y <- range mny mxy npnts ] | x <- range mny mxy nstps ]
lns0 = hlns ++ vlns

eclds = map euclideanPoint <$> lns0
plrs = map (chart Cartesian . transition . chart Polar . fromList (Euclidean 2)) <$> lns0

layoutMaker lns = execEC $ do

    layout_x_axis . laxis_override .= axisGridHide
    layout_x_axis . laxis_generate .= scaledAxis axprms (-2,2)
    layout_x_axis . laxis_title .= "x"

    layout_y_axis . laxis_override .= axisGridHide
    layout_y_axis . laxis_generate .= scaledAxis axprms (-2,2)
    layout_y_axis . laxis_title .= "y"

    plot . liftEC $ do

        plot_lines_values .= (map toPair <$> lns)
        plot_lines_style .= solidLine 3 (opaque black)


-- Main --

main = do
    let lyt1 = layoutMaker eclds
        lyt2 = layoutMaker plrs
        rnbl = toRenderable $ StackedLayouts [StackedLayout lyt1, StackedLayout lyt2] False
    --renderableToAspectWindow False 400 800 rnbl
    void $ renderableToFile (FileOptions (200,400) PDF) "coordinates.pdf" rnbl