Few questions on Lua/Le

[Joh]

In c++/bmax we use collision callback to have infos from collision wath i should use on lua?

Is there any way to create a vector/list on lua?

Thx.

[Joh]

Anyone known? Seem really strange.. There is nobody who need to check collision on theyr game using lua?

I think to have found a sort of solution for list/vector.

[ESP]

Care to share?

 

Robin

[Joh]

I need to check it before.. Lua array are undefinited, so you can create an array like this:

 

array = {}
for i=1, 100 do
     array[i] = 0
end

 

In this case we could do something like this i guess:

 

Function addLast (a)
     array[counter] = a
     counter = counter + 1
end

Function removeFirst()
     a = array[0]
     for i=0, counter-1
           array[i] = array [i+1]
     end
     array[counter] = nil
     counter = counter - 1
     return a
end 

 

I need to check it, it obviously not a list but it can work.

[AndyGFX]

Lua 5.1 has lib table, which works like TList container: LUA Table Library

[Joh]

Thx for the answer!

Anyway my big problem is about collision as i am making a tool wich need collision..

[Soamp]

Hi,

Table is the best way to go! however you can also use Vec2,Vec3,Vec4 functions to create 2/3/4 dimentional vectors.

vec1=Vec3(0,0,0)

 

about collisions, LE have a object:Collision() function that runs when a collision occures. you can use it like this :

function object:Collision(entity,position,normal,force,speed)
    ...
end

 

where Entity is the entity that collided this object.

 

you can see "oildrum.lua" (oildrum script) for example

[Joh]

Yeah i know about vec2 vec3 and vec4, but i was meaning c/c++ vector ( http://www.cplusplus.com/reference/stl/vector/ )

 

Thx for the collision issue, i didn't found that on oildrum.

[Joh]

Mmm seem this doesn't help me at all.

What i am trying to do if check if a body (created by code) is collided or not. I don't need to know more other infos, just if it's collided.

The oildrum code it's seem a little different it created a class for a model and so took the object and check the collision.. Did i need to create an empty gmf and create a lua file as oildrum have?

[Josh]

There is a collision object function you can use with models. See the basic Lua tutorial.

[Joh]

There is a collision object function you can use with models.

That was my tought there is no way to check the collision from the body itself.. To do this i should modify all the models to handle collision with that body OR create an "empty" model to do this..

So for example if i wanna check the collision from 2 bodies created directly on code?

[Josh]

Use the entity collision callback.

[Joh]

mmm how? There is no any docs on it.. I am able to do it on c++ and bmax, but don't know the way to do it on lua..