function imp:do_jump ( jumpfwd )
if DEBUG_FN_NAME then print("do_jump") end
-- msg_print(0,0,"do_jump",true)
    -- Inicialització de fer el salt
    jumpfwd = jumpfwd or false
    self.jump_height = 0
    -- self.moure=imp.state_jumping
    self:_moure(imp.state_jumping,"state_jumping (states)")
    self.step=0
    self.jumpfwd=jumpfwd
    self.action=""
end

function imp:state_jumping()
    if self.mood==self.moods.stop then return self.mood end
if DEBUG_FN_NAME then print("state_jumping") end
    -- msg_print(0,0,"state_jumping",true)
    -- ??
    self.wait=self.wait+1
    self.wait=0

    -- Pujar o caure
    if self.jump_height<self.max_jump_height then
        -- Comprovar que pasa en l'aire
        self:jump()
    else
        -- Canviar a mode caure
        -- self.moure=imp.state_falling
        self:_moure(imp.state_falling,"state_falling (states)")
    end
    self.step=self.step+1

    -- cap endavant?
    if self.jumpfwd then self:advance() end
end

function imp:jump()
if DEBUG_FN_NAME then print("jump") end
-- msg_print(0,0,"jump",true)
    local vspace = self.vmove_space
    -- Els dos punts de dalt del personatge
    local x1_check = self.x+self.bb.x
    local x2_check = self.x+self.bb.x+self.bb.w
    local y_check = self.y-vspace; -- posicio de dalt

    -- Comprovar on està pegant
    local tile1_hit_type= arc_check_tile(x1_check, y_check )
    local tile2_hit_type= arc_check_tile(x2_check, y_check)
    local not_block_tile = tile1_hit_type ~= tiletype.block and tile2_hit_type ~= tiletype.block

    -- Fer l'acció que correspon
    if not_block_tile then
        -- Ascendir
        self.y=self.y-vspace
    else
        -- Si es un bloc permetre gastar l'espai no pintat
        local tile1_hit = arc_get_tile(x1_check, y_check )
        local tile2_hit = arc_get_tile(x2_check, y_check)
        local half_block1 = mapa_is_half_block_tile(map_to_editor_tile(tile1_hit))
        local half_block2 = mapa_is_half_block_tile(map_to_editor_tile(tile2_hit))
        local full_block1 = tile1_hit_type == tiletype.block and not half_block1
        local full_block2 = tile2_hit_type == tiletype.block and not half_block2
        local full_block = full_block1 and full_block2
        local half_block = half_block1 or half_block2
        -- Si ninguno dels tiles tocats es un block complet
        -- i almenys un dels tiles tocats es mig tile
        -- permetre continuar en el salt
        if not full_block and half_block then
            if self.jump_in_half_block==0 and not self.jump_in_half_block_used then
                self.jump_in_half_block = arcade_config.tiles_height / 2
            end
            if self.jump_in_half_block>0 then
                self.y=self.y-vspace
                self.jump_in_half_block = self.jump_in_half_block-1
                self.jump_in_half_block_used = true
            end
        end
    end

    -- Registrar el desplaçament
    self.jump_height = self.jump_height+1
end

function imp:state_walking()
    if self.mood==self.moods.stop then return end
if not DEBUG_FN_NAME then print("state_walking") end
-- msg_print(16,48,"state_walking",true)

    -- Limitar la velocitat de moviment
    self.wait=self.wait+1

    -- Funció de selecció de frame
    self.next_frame = imp.walking_next_frame

    -- Comprovar dos punts de contacte del personatge en el piso a vore si cau
    local x1_check = self.x+self.bb.x
    local x2_check = x1_check+self.bb.w
    local y_check = self.y+self.bb.h; -- base del personatge
    local tile1 = arc_check_tile(x1_check,y_check)
    local tile2 = arc_check_tile(x2_check,y_check)
    if tile1==tiletype.void and tile2==tiletype.void then
        -- si no hi ha piso, caure
        self.moure=imp.state_falling
        self:_moure(imp.state_falling, "state_falling (states-walking)")
        return
    end

    self:advance()
end

function imp:state_falling()
if DEBUG_FN_NAME then print("state_falling") end
-- msg_print(16,16,"state_falling",true)

    self.frame=30
    self.wait=self.wait+1

    -- Si toca terra canviar el mode
    if self:land() then
        -- self.moure=imp.state_normal
        self:_moure(imp.state_normal,"state_normal (states)")
        return
    end
print("FALLING!")
    -- Seguir caiguent
    self.y=self.y+1
    self.jump_height = self.jump_height-1
    self.falling=self.falling+1

    -- Caiguent cap endavant?
    if self.jumpfwd then self:advance() end
end

function imp:land ()
if DEBUG_FN_NAME then print("land") end
-- msg_print(16,32,"land",true)
    -- Els dos punts de baix de l'abad
    local x1_check = self.x+self.bb.x
    local x2_check = self.x+self.bb.x+self.bb.w
    local y_check = self.y+self.bb.h

    -- Comprovar on està aterrant
    local tile1_hit= arc_check_tile(x1_check, y_check )
    local tile2_hit= arc_check_tile(x2_check, y_check)
    local floor_tile = tile1_hit>=tiletype.half or tile2_hit>=tiletype.half

    -- Encara que siga un tile de piso s'ha de comprovar que
    -- la y es un múltiple de l'alt dels tiles
    local over_tile = (y_check & 0xF) == 0

    local can_land = floor_tile and over_tile

    if can_land then
        self.jump_in_half_block_used = false
        self.jump_height = 0
        self.action_event = "land"
    end

    return can_land
end

function imp:advance()
if DEBUG_FN_NAME then print("advance") end
-- msg_print(10,20,"advance",true)
    local step_length=self.step_length; --lo que avança el imp cada pas
    local limit=tiletype.block

    if self.moure~=imp.state_walking then limit=tiletype.half end

    local x_check = self.x+self.bb.x+self.bb.w+step_length
    -- if self.flip then
        -- step_length = -step_length
        -- x_check = self.x+self.bb.x+step_length
    -- end

    -- self.action=="right"
    -- if self.action=="left" then
-- print("ADVANCE => "..self.movement)
    if self.movement==self.actions.left then
        step_length = -step_length
        x_check = self.x+self.bb.x+step_length
    end

    local y_check = self.y+self.bb.h-4

    if arc_check_tile(x_check, y_check)<limit then
        self.x=self.x+step_length
    end

    local hab,xx, yy = coords.world_to_tile(self.x, self.y)
    self.hab = hab
    -- self.movement = ""
end

-- Controlador principal del personatge
function imp:state_normal()
if DEBUG_FN_NAME then print("state_normal") end
    self.frame=28
    self.wait=0
    self.step=0
    self.jumpfwd=false
    self.jump_height = 0
end