Lua Programming Help Thread

Ohh... i understand... theres multiple ways...

I'm just making a for-fun script that has a visual effect, well, what I'm trying to achieve is a visual effect.

an error that keeps popping up: lua: 36 : argument was incorrect

heres my short script:

Code:

---

black = Color.new(0, 0, 0)
white = Color.new(255, 255, 255)
red = Color.new(255, 0, 0)
green = Color.new(0, 255, 0)
blue = Color.new(0, 0, 255)

width = 480
height = 272

while true do

pad = Controls.read()

if pad:cross() then
break
end

screen:clear(black)

h = math.random(1, 100)

x = width/h
y = height/h

z = math.random(1, 4)

if z == 1 then
screen:pixel(x, y, white)
end

if z == 2 then
screen:pixel(x, y, red)
end

if z == 3 then
screen:pixel(x, y, green) -- this is line 36
end

if z == 4 then
screen:pixel(x, y, blue)
end

screen.flip()
screen.waitVblankStart()
end

---

whats wrong? :confused:

Zitat:

---

Zitat von EminentJonFrost

I'm just making a for-fun script that has a visual effect, well, what I'm trying to achieve is a visual effect.

an error that keeps popping up: lua: 36 : argument was incorrect

heres my short script:

Code:

---

black = Color.new(0, 0, 0)
white = Color.new(255, 255, 255)
red = Color.new(255, 0, 0)
green = Color.new(0, 255, 0)
blue = Color.new(0, 0, 255)

width = 480
height = 272

while true do

pad = Controls.read()

if pad:cross() then
break
end

screen:clear(black)

h = math.random(1, 100)

x = width/h
y = height/h

z = math.random(1, 4)

if z == 1 then
screen:pixel(x, y, white)
end

if z == 2 then
screen:pixel(x, y, red)
end

if z == 3 then
screen:pixel(x, y, green) -- this is line 36
end

if z == 4 then
screen:pixel(x, y, blue)
end

screen.flip()
screen.waitVblankStart()
end

---

whats wrong? :confused:

---

try this:

Code:

---

math.randomseed(os.time())

black = Color.new(0, 0, 0)
white = Color.new(255, 255, 255)
red = Color.new(255, 0, 0)
green = Color.new(0, 255, 0)
blue = Color.new(0, 0, 255)

width = 480
height = 272

h = math.random(1, 100)
z = math.random(1, 4)

x = width/h
y = height/h


while true do

pad = Controls.read()

if pad:cross() then
break
end

screen:clear()

if z == 1 then
screen:pixel(x, y, white)
elseif z == 2 then
screen:pixel(x, y, red)
elseif z == 3 then
screen:pixel(x, y, green)
elseif z == 4 then
screen:pixel(x, y, blue)
end

screen.flip()
screen.waitVblankStart()
end

---

you should use elseif statemnts, they lower the chance of an error bigtime.

how can i do

if player.y == 138(pixel on my screen) then gravity = 138 so tha when i jump i don't past trugh the floor. cause the floor im jumping on is higher

Zitat:

---

Zitat von ZereoX

how can i do

if player.y == 138(pixel on my screen) then gravity = 138 so tha when i jump i don't past trugh the floor. cause the floor im jumping on is higher

---

you need to post a little more coding up.

Here is the part of my code

Code:

---

player = {}
player.gravity = 160
player.y = 230
player.x = 50
player.jumpspeed = 10
player.jumpstate = "ground"


while true do
pad = Controls.read()
screen:clear()

screen:blit(0,0,Background1)

if pad:r() and oldpad:r() ~= pad:r() then
bulletSetup()
end


if pad:left() then
player.x = player.x - 2
end
if pad:right() then
player.x = player.x + 2
end

if pad:cross() and player.jumpstate == "ground" then player.jumpstate = "jumping" end

if player.jumpstate == "jumping" then
player.jumpspeed = player.jumpspeed - 0.5
player.gravity = player.gravity - player.jumpspeed
end

if player.gravity < 0 then
player.jumpstate = "falling"
end

if player.gravity < 160 and player.jumpstate == "falling" then
player.gravity = player.gravity + (player.jumpspeed + 3)
end

if player.gravity == 160 then
player.jumpspeed = 10
player.jumpstate = "ground"
end

if player.gravity > 160 then player.gravity = 160 end

player.y = player.gravity

screen:blit(player.x,player.y,player1)
screen:blit(0,0,ground)

---

i want to do when the legs of the player that mean the player.y touches the floor where its higher then the normal floor the gravity changes so that he stay on and not pass true it up to the same high as the prvious floor.

Code:

---

player = {}
player.gravity = 160
player.y = 230
player.x = 50
player.jumpspeed = 10
player.jumpstate = "ground"


while true do
pad = Controls.read()
screen:clear()

screen:blit(0,0,Background1)

if pad:r() and oldpad:r() ~= pad:r() then
bulletSetup()
end


if pad:left() then
player.x = player.x - 2
end
if pad:right() then
player.x = player.x + 2
end

if pad:cross() and player.jumpstate == "ground" then player.jumpstate = "jumping" end

if player.jumpstate == "jumping" then
player.jumpspeed = player.jumpspeed - 0.5
player.gravity = player.gravity - player.jumpspeed
end

if player.gravity < 0 then
player.jumpstate = "falling"
end

if player.gravity < 160 and player.jumpstate == "falling" then
player.gravity = player.gravity + (player.jumpspeed + 3)
end

if player.gravity == 160 then
player.jumpspeed = 10
player.jumpstate = "ground"
end

if player.gravity > 160 then player.gravity = 160 end

player.y = player.gravity

screen:blit(player.x,player.y,player1)
screen:blit(0,0,ground)

second_floor = {}
second_floor.y = 220 -- made it lower, just in case the player cant reach.
second_floor.x1 = 100
second_floor.x2 = 200

if player.y <= second_floor.y and player.x >= second_floor.x1 and player.x <= second_floor.x2  then
player.y = second_floor.y -- I forgot the ".y" last time.
end

---

try it now.
i made two changes from the last time, one correcting a stupid mistake on my part.

does't work it don't even change somthing.
Want me to send everything or you still have.

Zitat:

---

Zitat von ZereoX

does't work it don't even change somthing.
Want me to send everything or you still have.

---

Well instead of changing player.gravity you could say

Code:

---

if player.y >= 138 then
player.y = 138

---

Code:

---

if true then
screen:blit(x1, y1, player2)
x1 = x1 + 2
end

if true and pause == true then

screen:blit(x0, y0, up2)
screen.flip()
screen.waitVblankStart(10  )

screen:blit(x0, y0, up1)
screen.flip()
screen.waitVblankStart(10  )

y0 = y0 - 2
end


if pad:up() then
pause = true
end

---

noone yet helped me yet, (i think noone knows how to fix it).
anyways, is there a way to make the up1 and up2 change after each move?