maketangible('grass')

if global.once("build grass") then
  for y=0,4 do for x=0,y%2==1 and 3 or 4 do
    tangible.build{class="grass",x=y%2==1 and 2*x+1 or 2*x+1,y=2*y+1,z=0,plane="main",graphic="grass"}
    end end
  end

if global.once("walkable") then global.walkable={} end
if global.once("walkable main") then global.walkable["main"]={} end


function walkable(pl,x,y)
  if not global.walkable then return false end
  if not global.walkable[pl] then return false end
  if not global.walkable[pl][y] then return false end
  return global.walkable[pl][y][x] or false
  end

function setwalkable(pl,x,y,val)
  if not global.walkable[pl][y] then global.walkable[pl][y]={} end
  global.walkable[pl][y][x]=val
  end

if global.once("walkablexy") then for y=0,4 do for x=0,4 do setwalkable("main",x,y,true) end end end

function player.move(actor,place,dx,dy)
  local _,pl,x,y,_,_=tangible.animstate(actor)
  print("Checking walkable "..pl.." "..x.." "..y.." is "..(walkable(pl,x+dx,y+dy) and "true" or "false"))
  if not walkable(pl,x+dx,y+dy) then print("Not walkable") else
    tangible.animate(place, {action="walk", dx=dx,dy=dy})
    local lis=tangible.near(actor,1,false,true)
    if #lis==0 then print("The area is empty")
    else for _,t in pairs(lis) do
      print("There is a "..tangible.getclass(t).." here")
      end end
    end
  _,pl,x,y,_,_=tangible.animstate(actor)
  print("Your location is "..x.." "..y)
end