I believe I have everything settled up correctly… It’s saying I have a nil value! I have my player defined in the Main class so idk what I did wrong. Please help
Player = class()
function Player:init(img,x,y)
self.image = img
self.x = x
self.y = y
self.width, self.height = spriteSize(self.image)
end
function Player:draw()
sprite(self.image,self.x,self.y,self.width,self.height)
end
function Player:left()
if time < 1 then
if self.image == ("Documents:PL1")then
self.image = ("Documents:PL2")
elseif self.image == ("Documents:PL2") then
self.image = ("Documents:PL3")
elseif self.image == ("Documents:PL3") then
self.image = ("Documents:PL4")
elseif self.image == ("Documents:PL4") then
self.image = ("Documents:PL1")
end
end
end
function Player:right()
if time < 1 then
if self.image == ("Documents:PL1") then
self.image = ("Documents:PL2")
elseif self.image == ("Documents:PL2") then
self.image = ("Documents:PL3")
elseif self.image == ("Documents:PL3") then
self.image = ("Documents:PL4")
elseif self.image == ("Documents:PL4") then
self.image = ("Documents:PL1")
end
end
end
this kind of error is almost always from an instance call with a ‘.’ instead of a ‘:’ . Look for a player1.right() instead of a player1:right() in your main or elsewhere.
Player = class()
function Player:init(img,x,y)
self.image = img
self.x = x
self.y = y
self.width, self.height = spriteSize(self.image)
end
function Player:draw()
if playerface == 1 then
sprite(self.image,self.x,self.y,self.width,self.height)
elseif playerface == -1 then
sprite(self.image,self.x,self.y,-self.width,self.height)
end
end
function Player:left()
if time < 1 then
if self.image == ("Documents:PL1")then
self.image = ("Documents:PL2")
elseif self.image == ("Documents:PL2") then
self.image = ("Documents:PL3")
elseif self.image == ("Documents:PL3") then
self.image = ("Documents:PL4")
elseif self.image == ("Documents:PL4") then
self.image = ("Documents:PL1")
end
end
end
function Player:right()
if time < 1 then
if self.image == ("Documents:PL1") then
self.image = ("Documents:PL2")
elseif self.image == ("Documents:PL2") then
self.image = ("Documents:PL3")
elseif self.image == ("Documents:PL3") then
self.image = ("Documents:PL4")
elseif self.image == ("Documents:PL4") then
self.image = ("Documents:PL1")
end
end
end
Main class.................
-- Visit From Space
sprite("Cargo Bot:Command Left")
-- Use this function to perform your initial setup
function setup()
time = 0
playerface = 1
left = Button("Cargo Bot:Command Left",600,100,80,100)
right = Button("Cargo Bot:Command Right",700,100,80,100)
for i=0,1 do
x = math.random(300,500)
y = math.random(300,500)
Enemy(x,y)
end
player = Player("Documents:PL1",400,100)
end
-- This function gets called once every frame
function draw()
time = time + 1
if time > 10 then
time = 0
end
-- This sets a dark background color
background(40, 40, 50)
Enemy:draw()
player:draw()
left:draw()
right:draw()
left:touched()
right:touched()
-- This sets the line thickness
strokeWidth(5)
-- Do your drawing here
end
@Ignatz The enemy and button class are perfectly working fine. It’s just that the player class won’t accept the self values from the :init(). I have the same in the button class and it works fine so I am very confused.
-- Game
Button = class()
function Button:init(img,x,y,width,height)
self.image = img
self.x = x
self.y = y
self.angle = 0
self.width = width
self.height = height
end
function Button:draw()
pushMatrix()
resetMatrix()
rotate(self.angle)
sprite(self.image,self.x,self.y,self.width,self.height)
popMatrix()
end
function Button:touched(touch)
--print(CurrentTouch)
if CurrentTouch.x > (self.x - self.width/2) and
CurrentTouch.x < (self.x + self.width/2) and
CurrentTouch.y > (self.y - self.height/2) and
CurrentTouch.y < (self.y + self.height/2) and
CurrentTouch.state < 2 then
if self.image == "Cargo Bot:Command Left" then
player.x = player.x -5
playerface = 1
Player.left()
else
player.x = player.x +5
Player:right()
playerface = -1
end
end
end
Enemy = class()
enemies = {}
bullets = {}
function Enemy:init(x,y)
self.x = x
self.y = y
table.insert(enemies,vec2(self.x,self.y))
end
function Enemy:draw()
for a,b in pairs(enemies) do
b.x = b.x + 1
sprite("Documents:UFO",b.x,b.y,100,120)
if b.x > WIDTH then
table.remove(enemies,a)
end
if b.x > player.x and
b.x < player.x+7 then
if time <= 1 then
table.insert(bullets,vec2(b.x+3,b.y-45))
end
end
end
Enemy:shoot()
end
function Enemy:shoot()
for a,b in pairs(bullets) do
sprite("Space Art:Red Bullet",b.x,b.y)
b.y = b.y - 2
if b.y < 0 then
table.remove(bullets,a)
end
end
end
I’m not getting an error but when I try and call the self.image in the draw program, it gives me a nil values:(
@Crazypkr1099 - you also had an error with Player.right() in the Button class, did you see that?
if that’s not it, you need to debug the problem
I usually put print statements into the code, for example, check that in the init function, the self.image gets set correctly by printing it, then print various things after that to check that everything is working. Try to figure out where it goes wrong, step by step.
Figured it out! I was calling a function without giving it a name. I ment to do player:right() not Player:right() thanks everything for helping me debug!
function Button:touched(touch)
--print(CurrentTouch)
if CurrentTouch.x > (self.x - self.width/2) and
CurrentTouch.x < (self.x + self.width/2) and
CurrentTouch.y > (self.y - self.height/2) and
CurrentTouch.y < (self.y + self.height/2) and
CurrentTouch.state < 2 then
if self.image == "Cargo Bot:Command Left" then
player.x = player.x -5
playerface = 1
Player.left()
else
player.x = player.x +5
Player:right()
playerface = -1
end
end
end
1 more question… are they any way to find out if the button is touched and stoped (such as state == ENDED). When I try touch.state == ENDED it gives me an error… I understand why it does but I cant figure out another way. Thanks everyone in advance, learning how to do all this will benefit me with making games
@Crazypkr1099 Why are you using CurrentTouch in the touched function. You should be using touch.x and touch.y . CurrentTouch is used when you don’t want to use the touched function.
