Editting Bullet.Lua

[Pancakes]

Hello, I'm getting my first lua scripting by messing around with Josh's Bullet.lua

 

I have some experience with Python and javascript but sometimes I'm an idiot. It would help me a lot if I could get some basic answers to some basic questions.

Just to get used to Lua I'm just trying to make a cube spawn whereever a bullet hits a model. How would I do that?

 

I tried some attempts last night but all I did was make the game slow down. Here is what the script looks like unmodified just as a reminder.

 

 

 

 

function UpdateBullets()
local bullet
local pick
local nextpos = Vec3(0)
local emitter,model
local bulletforce


for bullet,nothing in pairs(bullets) do

	if PointDistance(bullet.origin,bullet.position)>BULLET_MAXRANGE then
		bullet:Free()
	else
		nextpos.x = bullet.position.x + bullet.velocity.x / 60.0
		nextpos.y = bullet.position.y + bullet.velocity.y / 60.0
		nextpos.z = bullet.position.z + bullet.velocity.z / 60.0
		pick = LinePick( bullet.position, nextpos )
		bullet.position.x = nextpos.x
		bullet.position.y = nextpos.y
		bullet.position.z = nextpos.z
		if pick~=nil then
			SetWorld(fw.transparency.world)
			emitter=CreateEmitter(5,700,pick.normal,1)
			emitter:SetVelocity( pick.normal )
			emitter:SetRadius(0.1,0.5)
			emitter:SetWaver(10)
			emitter:SetColorf(0.5,0.5,0.5,0.1)
			emitter:Paint(material_impactdust)
			emitter:SetPosition( pick.position )
			emitter:SetRotationSpeed(0.1)
			SetWorld(fw.main.world)

			model=GetMeshModel(pick.entity)
			if model~=nil then
				bulletforce = bullet.velocity:Normalize()				
				d=-Dot(pick.normal,bulletforce)
				d=math.max(0,d)
				bulletforce.x = bulletforce.x * impactforce-- * d
				bulletforce.y = bulletforce.y * impactforce-- * d
				bulletforce.z = bulletforce.z * impactforce-- * d
				model:AddForceAtPoint( bulletforce, pick.position )

			end

			bullet:Free()
		end
	end
end
end

 

Thanks

[AggrorJorn]

right after Setworld I would try something like this:

 

cube = CreateCube()
cube:SetScale(Vec3(0.2,0.2,0.2))
cube:SetPosition( pick.position )

 

Don't know if it works. Can't run the engine on my laptop atm.

 

--edited my post without the error.

[Pancakes]

right after Setworld I would try something like this:

 

cube = CreateCube()
cube:SetScale(0.2,0.2,0.2)
cube:SetPosition( pick.position )

 

Don't know if it works. Can't run the engine on my laptop atm.

 

ahh, you know what that's what I tried to do but I put it on the wrong place, thanks

 

 

btw SetScale gives an error "value at index 2 is not an object", I think I'm supposed to use ScaleMesh but I need to test that out some more

 

ah, left out the Vec3

 

okay that was a big help thanks a lot

Edited March 21, 2010 by Pancakes

[AggrorJorn]

Glad it helped. So at the places where you hit a model or the scene there are now appearing boxes?

[Pancakes]

Glad it helped. So at the places where you hit a model or the scene there are now appearing boxes?

 

Yes. It's really cool. Those boxes could theoretically be chickens or decals or black holes and THINGOIDS.

[Kazar]

Yes. It's really cool. Those boxes could theoretically be chickens or decals or black holes and THINGOIDS.

 

I really like the look of that scene.. maybe its the color of the lights.