@Diarandor
Ah! I did not notice that tricky math variable.

@yankscally
No need for the math variable.

Your code worked, straight up. Thank you Zefk! A little bit of time writing that code for you would have taken me days to figure out, but I would have got there eventually. I'm from an music/art background so im no wizard but I do know the basics of code, I really appreciate the help! If you need some sounds for your game, I will happily supply them I'm working on some sound packs that are pretty neat, including a very nice sounding dialog menu, I could show you if you are interested!

[Zefk]

You are welcome. I updated that post about camera movements and other info. You will still have to set the direction as I mentioned.
http://forum.solarus-games.org/index.php/topic,962.msg5558.html#msg5558

Code: ( lua) [Select]

local entity = ...
local game = entity:get_game()
local map = entity:get_map()
local hero = map:get_hero()
local sprite
local straight = sol.movement.create("straight")
menu = false
local camera = map:get_camera()
camera:start_tracking(entity)


---Create sprite
function entity:on_created()
  sprite = entity:create_sprite("hero/tunic3"):set_animation("stopped")
  entity:set_can_traverse("hero", false)
  entity:get_direction(2)
  straight:set_speed(80)
end
 
--CONTROLS
--UP
function player_up()
 straight:set_angle(math.pi / 2)
 straight:start(entity)
end
 
--DOWN
function player_down()
 straight:set_angle(3 * math.pi / 2)
 straight:start(entity)
end

--Left
function player_left()
 straight:set_angle(math.pi)
 straight:start(entity)
end
 
--right
function player_right()
 straight:set_angle(0)
 straight:start(entity)
end


--Key press function
function sol.main:on_key_pressed(key)

--right
  if key == "l" and menu == false then
    player_right()
    entity:get_sprite():set_animation("walking")
  end

--left
  if key == "j" and menu == false then
    player_left()
    entity:get_sprite():set_animation("walking")
  end

--down
  if key == "k" and menu == false then
    player_down()
    entity:get_sprite():set_animation("walking")

  end

--up
  if key == "i" and menu == false then
    player_up()
    entity:get_sprite():set_animation("walking")
  end
end


function sol.main:on_key_released(key)

   if key == "l" then
       straight:stop()
       entity:get_sprite():set_animation("stopped")
   end
   
   if key == "j" then
       straight:stop()
       entity:get_sprite():set_animation("stopped")
   end
   
   if key == "k" then
       straight:stop()
       entity:get_sprite():set_animation("stopped")
   end
   
   if key == "i" then
       straight:stop()
       entity:get_sprite():set_animation("stopped")
   end

end


[Zefk]

I made a quick library example for the custom entity and attached it to this post. I made it mostly for the book project, but it can be used to shorten the script above. I included documentation and you will need a markdown reader like haroopad.

If you want to use it, then the script would look like this:

Code: ( lua) [Select]

local entity = ...
local game = entity:get_game()
local map = entity:get_map()
local hero = map:get_hero()
local sprite
menu = false


local camera = map:get_camera()
camera:start_tracking(entity)

---Create sprite
function entity:on_created()
  sprite = entity:create_sprite("hero/tunic1"):set_animation("stopped")
  entity:set_can_traverse("hero", false)
  entity:speed(80)
end

--Key press function
function sol.main:on_key_pressed(key)

--right
  if key == "l" and menu == false then
    entity:right()
  end

--up
  if key == "i" and menu == false then
    entity:up()
  end

--left
  if key == "j" and menu == false then
    entity:left()
  end

--down
  if key == "k" and menu == false then
    entity:down()
  end
end

function sol.main:on_key_released(key)
   --right
   if key == "l" then
       entity:stop()
   end

   --up
   if key == "i" then
       entity:stop()
   end

   --left
   if key == "j" then
       entity:stop()
   end

   --down
   if key == "k" then
       entity:stop()
   end
end

[Diarandor]

It is really cool to see that working. 
The feature of switching heroes would be very useful too for your project.