function sprint(self)
local sprint_speed = 2
local normal_speed = 1
--this is run in on_input. if the player is already sprinting and they hit LShift, they slow down
if sprinting then
self.speed = self.speed * normal speed
sprinting = true
--this is same as above, but to start sprinting
else then
self.speed = self.speed * sprint_speed
sprinting = true
end
end
Hi folks, when building my game I get
as an error. This is a function called in on_input(), when the player presses LShift. I have no idea of what is going wrong, because as far as I can tell, I am following the Lua on
Programming in Lua : 4.3.1 .
My full project is here, and I’d be really grateful if someone could take a look. Thanks
Thanks for the quick response. That has fixed the original error, but i also get the same error on sprinting=true, just above. Any suggestions?
Is it really the same error?
Can you post the error here, as well as your full source code?
1 Like
function init(self)
msg.post(".", "acquire_input_focus")
self.fire_possible = true
self.movement_possible = true
-- these may be changed in testing
self.ammo_count = 5
self.default_ammo = 5
self.total_ammo = 40
self.speed = 0
--up to here
self.ai_remaining = 8
self.kill_count = 0
self.bandage_count = 2
self.health_level = 100
self.velocity = vmath.vector3()
--raycasting
self.to = vmath.vector3()
local rendercam = require "rendercam.rendercam"
self.sprinting = false
self.crouched = false
end
--function for changing the speed of the player when shift is pressed
function sprint(self)
local sprint_speed = 2
local normal_speed = 1
--this is run in on_input. if the player is already sprinting and they hit LShift, they slow down
if sprinting then
self.speed = self.speed * normal speed
sprinting = true
--this is same as above, but to start sprinting
else
self.speed = self.speed * sprint_speed
sprinting = true
end
end
--function for changing height of player, simulating crouching
function crouch(self,crouched)
local pos = go.get_position() --position of player, because crouching will move the player down
if crouched == true then
pos.y = pos.y + 0.5
crouched = false
elseif crouched == false then
pos.y = pos.y - 0.5
crouched = true
end
return crouched
end
function heal(self)
--checks the player has bandages
if bandage_count > 0 then
--prevents the player from firing/moving
self.fire_possible = false
self.movement_possible = false
--starts a timer for 5 seconds
--health is increased by 30, and bandage count is decreased by 1
self.health_level = health_level + 30
msg.post("go#hud", healed, health_level) --messages the HUD collection to update the health displayed on the gui
self.bandage_count = bandage_count - 1
msg.post("go#hud", bandage_sub, bandage_count)
--fire_possible and movement_possible are now true
self.fire_possible = true
self.movement_possible = true
else
--dealt with in gui_script with a popup saying out of bandages
msg.post("go#hud","no_heal")
end
end
function fire(self)
if (self.ammo_count > 0) then
if (self.fire_possible == TRUE)then
--add fire animation and sound
self.ammo_count = self.ammo_count - 1
msg.post("go#hud", "ammo","ammo_count")
--raycast
local from = go.get_position()--players position
local to = self.to --players viewing co-ords
local groups = {hash("enemy")} -- collision group to test against
local result = physics.raycast(from, to, player)
if result == true then
msg.post(enemy, dead)
self.kill_count = self.kill_count + 1
msg.post("go#hud", "kill","kill_count")
end
else
msg.post("go#hud", "no_fire")
end
end
end
function reload(self)
if self.total_ammo > 5 then
self.fire_possible = false
self.total_ammo = self.total_ammo - 5
self.ammo_count = self.default_ammo
self.fire_possible = true --allows the player to fire once the time has finished
local mag = self.total_ammo / 5 --number of magazines left
msg.post("go#hud", "reload","mag")
end
end
function update(self, dt)
local pos = go.get_world_position()
pos = pos + self.velocity * dt
go.set_position(pos)
self.velocity.x = 0
self.velocity.z = 0
end
function on_input(self, action_id, action)
local vel = 100 --originally 20, but it was way too slow
if action_id == hash("forward") then
self.velocity.z = -vel --it would be positive, but due to the way i oriented the map it needs to be negative.
end
if action_id == hash("back") then
self.velocity.z = vel
end
if action_id == hash("left") then
self.velocity.x = -vel
end
if action_id == hash("right") then
self.velocity.x = vel
end
if action_id == hash("reload") then --uses the reload() as the callback which starts when the 5 seconds are up
timer.delay(5, false, reload)
end
if action_id == hash("touch") then
timer.delay(3, false, fire)
end
if action_id == hash("crouch") then
crouch()
end
if action_id == hash("sprint") then
sprint()
end
if action_id == hash("heal") then
timer.delay(5, false, heal)
end
if action_id == hash("esc") then
msg.post("loader:/go#loader", "show_esc")
end
end
There you go
You have misspelled normal_speed
Also, you are mixing global variables (“sprinting”) with script instance variables (“self.sprinting”). This will lead to confusion, and most likely bugs for you.
Also, I’d put the “require” statement at the top of the file, not in the middle of a function.
It’s easier to read/find later on.
3 Likes
Thank you so much for spotting that. I have done what you said, and it works as expected. I changed sprinting to self.sprinting all round, and will do the same for the crouch function. Thank you for the quick response
3 Likes
