Top Down Movement and Animation in Defold - Defold 2D Tutorial 5

Описание: A tutorial on top down movement and animation in Defold.

Script:

function init(self)
msg.post("#", "acquire_input_focus")
msg.post("Gui", "disable")
self.in_dir = vmath.vector3(0,0,0)
self.speed = 100
self.actions = {} -- map actions to self
self.current_animation = nil
end


local function animate(self,animation)
if self.current_animation ~= animation then
self.current_animation = animation
sprite.play_flipbook("#Player Sprite", animation)
end
end

function update(self, dt)
--horizontal and vertical animation handlers
if self.actions[hash("Left")] then
animate(self, "Walk Left")
self.in_dir.x = -self.speed
elseif self.actions[hash("Right")] then
animate(self, "Walk Right")
self.in_dir.x = self.speed
else
self.in_dir.x = 0
end
if self.actions[hash("Down")] and not self.actions[hash("Left")] and not self.actions[hash("Right")] then
animate(self, "Walk Down")
self.in_dir.y = -self.speed
elseif self.actions[hash("Up")] and not self.actions[hash("Left")] and not self.actions[hash("Right")] then
animate(self, "Walk Up")
self.in_dir.y = self.speed
else
self.in_dir.y = 0
end

--2 button conflict animation handlers
if self.actions[hash("Left")] and self.actions[hash("Right")] then
self.in_dir.x = 0
elseif self.actions[hash("Up")] and self.actions[hash("Down")] then
self.in_dir.y = 0
end


--idle script
if self.in_dir.x == 0 and self.in_dir.y == 0 then
animate(self, "Idle")
end
--move script
go.set_position(go.get_position() + self.in_dir * dt)


end

function on_message(self, message_id, message, sender)
pprint(message_id,message)
end

function on_input(self, action_id, action)
--allows getting actions in update function
if action_id then
if action.pressed then
self.actions[action_id] = true
elseif action.released then
self.actions[action_id] = false
end
end