function widget:GetInfo()
  return {
    name      = "ground normals",
    desc      = "some stuff with ground normals",
    author    = "knorke",
    date      = "5 Nov 2010",
    license   = "GNU GPL, v2 or later or horse",
    layer     = 0,
    enabled   = true,  --  loaded by default?
  }
end

local unit = nil

function widget:UnitFinished(unitID, unitDefID, teamID)
unit=unitID
--Spring.GiveOrderToUnit(unit,31210,{UnitDefNames["bmetaltruckdepot"].id},{})
end

function widget:DrawWorldPreUnit()
	if (unit==nil) then return end
	local x,y,z=Spring.GetUnitPosition (unit)
	gl.LineWidth(5.0)
	local gnx,gny,gnz = Spring.GetGroundNormal (x,z)
	gl.DrawGroundCircle (x,Spring.GetGroundHeight(x, z),z, 50, 16)
	--Spring.Echo ("->" .. gnx .." " .. gny .. " " .. gnz)
	local d = 100
	local x2=x-(gnx*d)
	local y2=y+(gny*d)
	local z2=z-(gnz*d)
	for i = 0, 1000, 50 do
		x2=x2-(gnx*d)
		y2=y2+(gny*d)
		z2=z2-(gnz*d)
		gl.DrawGroundCircle (x2,Spring.GetGroundHeight(x2, z2),z2, 10, 16)
		gnx,gny,gnz = Spring.GetGroundNormal (x2,z2)
	end
	--Spring.GiveOrderToUnit(unit, CMD.MOVE , {x2, y2, z2  }, {})
end

function widget:GameFrame(frame)
if (unit==nil) then return end
if (frame % 2 ~=0) then return end
local x,y,z=Spring.GetUnitPosition (unit)
local gnx,gny,gnz = Spring.GetGroundNormal (x,z)
--for d = 0, 1000, 50 do
local d = 500
	local x2=x-(gnx*d)
	local y2=y+(gny*d)
	local z2=z-(gnz*d)
--end
--Spring.GiveOrderToUnit(unit, CMD.MOVE , {x2, y2, z2  }, {})
end