I’m trying to update the war battles project to be multiplayer and server authoritative. So far I batch the player movements and send them to the server. On the server I receive the batched inputs and run them one after the other on_message.
This works great if there are no collisions and the client and server final positions are spot on (assuming no packet loss). But as soon as I start colliding, the sever just keeps updating movement.
I assume because it can’t see the collisions while inside the on_message loop, the updates need to happen in the update function? But if I have batched inputs and want to play them as fast as possible, I can’t run them in the update function. Also not sure how I would from on_message, as calling update from on_message doesn’t seem to work. Any ideas on how I could get the collision to trigger?
(for collisions I’m using the standard code from Resolving kinematic collisions in Defold) Here’s my basic movement function in on_message:
if message_id == hash("movement") then
local steps = message[1]
local final_x = message[2]
local final_y = message[3]
local client_final_pos = vmath.vector3(final_x, final_y, 1)
print("Moving the player on the server!")
for key, step in pairs(steps) do
local input_x = step[1]
local input_y = step[2]
local dt_sum = step[3]
self.input = vmath.vector3(input_x, input_y, 0)
if vmath.length(self.input) > 0 then
self.moving = true
self.dir = vmath.normalize(self.input)
end
-- update(self, dt_sum) //doesn't seem to work
self.correction.x = 0
self.correction.y = 0
self.correction.z = 0
if self.moving then
local pos = go.get_position()
new_pos = pos + self.dir * (self.speed * dt_sum)
go.set_position(new_pos)
end
self.input.x = 0
self.input.y = 0
self.moving = false
self.firing = false
end
print("final server position:")
print(go.get_position())
print("final client position:")
print(client_final_pos)