Lua Programming Help Thread

[xXChromeXx]

How would I make platforms that I can jump on?

Sorry, just started coding 3 days ago.:Punk:

[PSProgramer]

umm, well, that would kinda work, except all you did is move the coin over, to the side so you should have.

if player.x == coin.x, and player.y = coin.y and coin.visible = "true" then
coin.visible = "false"
player.points = player.points + 10
end

add that andyou won't need to worry about it

[PSProgramer]

add collision to the platforms

[xXChromeXx]

add collision to the platforms

I tried but its not working and collision pisses me off

:Argh:

[PSProgramer]

lol,well it's not going to magically work, lol look at the collision tut at evilmana

[eldiablov]

You aren't gonna make much without collision detection :/

There is a nice collision snippet on http://www.tacticalpenguin.com

[xXChromeXx]

lol,well it's not going to magically work, lol look at the collision tut at evilmana

I took the code from the tut LOL its just not working

[xXChromeXx]

The coin function doesnt worl if the coins are in the air

[PSProgramer]

what do you mean, it should, add a if player.jumping = "true" kinda thing.

[xXChromeXx]

Is there a way to show an image only when no buttons are being pressed, and when I press a button the image dissapears?

[eldiablov]

Work these thing out for yourself. You won't learn anything by continually asking for code.

[xXChromeXx]

Work these thing out for yourself. You won't learn anything by continually asking for code.

Is there a pad ~= pressed function

[PSProgramer]

ummm, I think so. . . I don't remeber exactly what it was, what are you using it for??mabey I can help more then...

[xXChromeXx]

ummm, I think so. . . I don't remeber exactly what it was, what are you using it for??mabey I can help more then...

when I press left it shows left sprite image, when I press right it shows right sprite image, when I press up it shows up sprite image, when I press down it shows down sprite image, so if I blit still sprite image it merges with the other sprite image so I need it to dissapear while im pressin up left right or down

[eldiablov]

Is there a pad ~= pressed function

there's an if not ;)

[xXChromeXx]

there's an if not ;)

elseif?

[eldiablov]

of course

[xXChromeXx]

of course

Thanks

[Nielkie]

Each pad function returns true or false, so learn Lua's Boolean operations.

if pad:left() then
	blah
else
	blah
end

or

if pad:left() then
	blah
elseif bla2 then
	blah
end

or

if pad:left() ~= true then

or

if pad:left() == false then

or

if not pad:left() then

[xXChromeXx]

Each pad function returns true or false, so learn Lua's Boolean operations.

if pad:left() then
	blah
else
	blah
end

or

if pad:left() then
	blah
elseif bla2 then
	blah
end

or

if pad:left() ~= true then

or

if pad:left() == false then

or

if not pad:left() then

Thanks

[Freshmilk]

--[[Drawing a circle
Created by FxN

This draws a circle and takes 5 arguements:
1.Target = What we are drawing on
2.X coordinate
3.Y coordinate
4.Radius of the circle
5.Color

The X and Y coordinates are for the middle point of the circle]]

function drawcircle(target, ux, uy, crad, ccolor)
	degree = 0
	while degree < (6.4) do
		target:pixel((math.floor(crad * math.cos(degree)))+ ux, (math.floor(crad * math.sin(degree))) + uy, ccolor)
		degree = degree + 0.005
	end
end --drawcircle
---circle function

screen:clear()
drawcircle(screen,100,100, 50, red)
screen.flip()
while not Controls.read():cross() do
screen.waitVblankStart(1)
end

I tried using this in a game I'm making, but it just lags like hell. Anyone have any idea what the problem might be? I know that I havn't put the function in the loop, but I did call it. If I leave all the surrounding code alone and put '--' in front of the drawcircle() so that luaplayer skips it, it runs fine, but I don't see why a simple calculation would slow it so much.

[Slasher]

Just look at it...

Every single loop if you call that, it has to add 0.005 onto degree all the way up until it gets to 6.4. That's 1280 times.

That would probably do it... Try something like 0.05 (128 times), see if that helps?

[Freshmilk]

Ohhh yeah, Good point. I didn't even notice that, My bad. Anyway, I don't need help with this anymore, I got TacticalPenguin to show me another way to do it. Thanks anyway, though.

[xXChromeXx]

Is Luaplayer or LuaplayerHM better?

[TurtlesPwn]

Depends what you want it for. If you want it for making a game, generally good ol 0.16 will be your best bet but if you need to use a bunch of oneline functions to make a crappy shell then go for HM, that's about all it's used for anyways.

[xXChromeXx]

Depends what you want it for. If you want it for making a game, generally good ol 0.16 will be your best bet but if you need to use a bunch of oneline functions to make a crappy shell then go for HM, that's about all it's used for anyways.

Ok because im currently using luaplayer 0.16 for my game just wanted to make sure

[wicked_fable]

Okay, just a couple of questions. First of all, is the easiest way to do a credits ending just putting the y values of each line of text as something like y + 5? Using this way I would have to write each line of credit individually and have to do a lot of estimation in order to get it write which is why I ask.

Second, is there way to do fading effects by programming it? Like have one image fade into another or just have an image fade into black? I have searched but maybe I am looking for the wrong thing?

Thanks,
Daniel

[PSProgramer]

Question, I need to mave an image accross the screen, during the game, but I don't want it to just appear, I need to be able to see the movement :) any help would be appreciated.

[xXChromeXx]

Question, I need to mave an image accross the screen, during the game, but I don't want it to just appear, I need to be able to see the movement :) any help would be appreciated.

You could make a table for the image
For Example

image = {}
image.x = 60

after this just make a simple code such as

if blah blah blah then
image.x = image.y + 5
end

then just blit the image
screen:blit(image.x,image .y,image)

that will move the image every loop

[PSProgramer]

... ummm mabey... but I don't think that would work for what I'm trying to do, but thanx. I think I figured it out. :)