Need help with lua? - LunaLua General Help

[Emral]

I have the sprites from the Fire Flower form, the Ice Flower form, and Hammer Suit forms have frames of the player throwing fireballs/iceballs/hammers while moving, jumping, falling, & swimming*. How do i use the .lua script to display the different sprite frames of the throwing frames while moving. :?:

Take a look at this chart:
http://i.imgur.com/1dnW3g3.png

If you overlay your spritesheet with this, you can find out the index of all different frames for your character.
There's a mem offset in the player class which uses these indices to display the appropriate player frame. You want to set it to the number you need during the appropriate frames:

Code: Select all

player:mem(0x114, FIELD_WORD, myFrame)

When this is is something you need to determine for yourself. What I suggest in your situation is to perform a check for whether the player's frame index is equal to one of the standard fireball throwing frames and set it accordingly based on that:

Code: Select all

local vanillaFrame = player:mem(0x114, FIELD_WORD)
if vanillaFrame == 12 then
	if (falling) then
		--set frame
	elseif (runnig) then
		--set frame
	...etc
	end
end

[FireyPaperMario]

Okay, I'll go test it out, thanks

[Daring Tombstone]

This script doesn't do what I want it to.

Code: Select all

 
function onTick()
local Air = BGO.get({137})
	for k,v in pairs(Air) do
		if player.x + player.width >= v.x and player.x <= v.x + 32 and player.y + player.height >= v.y and player.y <= v.y + 32 and not v.layer.isHidden then
			collidesWithData = true
			break
		end
	end
	if collidesWithData then
		AirofPlayer1 = 100
	end
end

I added this in the LsBreathMeter API in an attempt to give the player air back when swimming through background bubbles but it doesn't work.
I tried using onNPCKill with bubbles but I have them on a generator. When the bubble gets offscreen it dies and registers as a kill. At the very least is there a way to make it where the onNPCKill only triggers if the player collects the bubble? I don't mind using an NPC bubble instead of a background bubble.

[Quantumenace]

Is that the right BGO ID? The regular bubble is 173. Otherwise it seems to work, though you should set collidesWithData to false beforehand or make it local.

Been thinking about picking up powerups lately too. The memory offset 0x122 gets set to true for powerups that get picked up by the player and will be destroyed next tick. It also applies in other cases like destroying an enemy with a spinjump. I wonder if there will be an event for picking up a powerup in the next beta, that could be useful.

[Daring Tombstone]

I resprited the BGO 137 into some background bubbles but used the BGO 173 bubble to test it. The script works like it's supposed to because I can replace "AirofPlayer1" to "Defines.gravity" and when I enter the bubble gravity changes properly. For some reason though I can't set the "AirofPlayer1" in the same manner.

[Quantumenace]

It works if I print a debug message while in the bubble. I can't tell what else would be wrong with "AirofPlayer1" without seeing the rest of your code. How is the value behaving?

[Daring Tombstone]

The value of "AirofPlayer1" doesn't change at all. It'd be a wall of text if I pasted the whole script here, but I'm editing the LsBreathMeter API that's in the beta 3 version. The info I gave earlier is basically just added in that API.

But I found a workaround involving respriting a turnip into a bubble instead of respriting an axe and making it where if you collide with a turnip(bubble) it dies. Putting that on onNPCKill to give air back gives me results I'm satisfied with. Appreciate the effort to help though.

[Quantumenace]

Oh, I think it was just a capitalization error. It's AirOfPlayer1 but you had AirofPlayer1.

[Daring Tombstone]

Wow yeah that was it. Just a capitalization error. But now the AirOfPlayer1 is stuck at 100.
Probably just gonna do that workaround I mentioned earlier. Seems like too much trouble at this point.

[Novarender]

Can I use colliders.lua or something to make circular collision (player-collision)? If so, can I make it so I can slide on it, too?


On a separate note, could I add a conveyor-belt effect to something?

[PixelPest]

Colliders aren't intended in general to be used as a replacement for solid objects, they act more as trigger fields so trying to do get solid circular objects in that would be an immense amount of work.

In the case of the conveyor belt I'd be very surprised if there was a good way to simulate conveyor belt effects to a block/NPC so I'd honestly recommend just retaining them, or reskinning them to invisible and having a series of different BGOs to overlay on top which is what I generally do for cases like these

[Emral]

Setting the speedX value of a block will cause the player and npcs to slide across it at that speed, like how they would if the block were moving on a layer.

[Novarender]

Colliders aren't intended in general to be used as a replacement for solid objects, they act more as trigger fields so trying to do get solid circular objects in that would be an immense amount of work.

In the case of the conveyor belt I'd be very surprised if there was a good way to simulate conveyor belt effects to a block/NPC so I'd honestly recommend just retaining them, or reskinning them to invisible and having a series of different BGOs to overlay on top which is what I generally do for cases like these

The problem is, I need to have conveyor slopes. Or a conveyor-solid circle collider.

[Emral]

For the former just read my post above yours.
For the latter please enjoy reprogramming collision from scratch. (Doing that is also a requirement for making an accurate Sonic playable and is what has been keeping people away from making one)

[Daring Tombstone]

Sorry for this dumb question but I looked and couldn't find it. What's the default "Defines.player_walkspeed and runspeed" numbers? It's for a water current script I'm trying to do.

Edit: Nevermind I found it, should have looked for a few more minutes longer. Runspeed is 6 and walkspeed is 3.

So I won't waste a post, is there a way I can kill particle effects without using effect:KillParticles? KillParticles is just sudden, can I make it where the particles just fade away instead?

[PixelPest]

Sorry for this dumb question but I looked and couldn't find it. What's the default "Defines.player_walkspeed and runspeed" numbers? It's for a water current script I'm trying to do.

Edit: Nevermind I found it, should have looked for a few more minutes longer. Runspeed is 6 and walkspeed is 3.

So I won't waste a post, is there a way I can kill particle effects without using effect:KillParticles? KillParticles is just sudden, can I make it where the particles just fade away instead?

You just stop emitting them but continue to draw the particles

[Emral]

So I won't waste a post, is there a way I can kill particle effects without using effect:KillParticles? KillParticles is just sudden, can I make it where the particles just fade away instead?

Emitters have an "enabled" flag. Set that to false to stop automatic particle emission.

[Novarender]

How to have a plain black texture?

[Emral]

How to have a plain black texture?

Code: Select all

local left,top,right,bottom
local shouldRenderToScene
local renderPrio

Graphics.glDraw{
	vertexCoords={left,top,right,top,right,bottom,left,bottom},
	primitive=Graphics.GL_TRIANGLE_FAN,
	sceneCoords=shouldRenderToScene,
	color={0,0,0,1},
	priority=renderPrio
}

Replace the variables and you're set. No texture needed.

[Novarender]

How to have a plain black texture?

Code: Select all

local left,top,right,bottom
local shouldRenderToScene
local renderPrio

Graphics.glDraw{
	vertexCoords={left,top,right,top,right,bottom,left,bottom},
	primitive=Graphics.GL_TRIANGLE_FAN,
	sceneCoords=shouldRenderToScene,
	color={0,0,0,1},
	priority=renderPrio
}

Replace the variables and you're set. No texture needed.

I have absolutely no idea how imagic or drawing graphics works, but I tried to replace the texture with the color property and I got white instead.

Code:

Code: Select all

overlays[k] = imagic.Circle
			{
				radius = r,
				x = playerCenterX,
				y = playerCenterY,
				scene = true,
				color={0,0,0,1},
				filltype = imagic.TEX_FILL,
				texoffsetX = (centerOnScreenX - 400)/800,
				texoffsetY = (centerOnScreenY - 300)/600
			}
			
			overlays[k]:Draw(VE_PRIORITY[k] + .1, 0xffffffff)

Not sure if there's anymore relevant code I need to include.