js to lua

[awgsknite]

Does anyone know of a js to lua converter ? I seen some sln projects on github that are too complex for me to use even though they have some instructions. I'm not an expert with lua yet so I'm trying to convert some js to lua scripts by myself with no success.

[aiaf]

I suggest you start with the lua tutorials from this site and after the Lua reference manual.

Here you go http://www.lua.org/docs.html

Take a few days for this or how long you need to be confident with your lua knowledge.

 

After doing this you should be able to convert this js by yourself if you still need it.

[awgsknite]

Thanks aiaf ! I learnt some new things from there ! One of them: global variables are ordinary variables !

 

After taking those tutorials it says that I'm a Lua expert ! On the tutorials page found here: http://www.leadwerks.com/werkspace/page/tutorials/

but I still can't place decals in my game yet lol so I don't feel like an expert just yet

[awgsknite]

stuck on this part:

 

anyone know how to convert this to lua ? :

 

switch( footprintType )

 

case 1 :

uvOffset = Vec2( 0.5, 1.0 )

break

 

case 2 :

[thehankinator]

stuck on this part:

 

anyone know how to convert this to lua ? :

 

switch( footprintType )

 

case 1 :

uvOffset = Vec2( 0.5, 1.0 )

break

 

case 2 :

Lua doesn't have a switch statement but you could do it with an if statement.

if footprintType  == 1 then
 uvOffset = Vec2(0.5, 1.0)
elseif footprintType == 2 then
  --blah blah
end

[awgsknite]

ah thats why..Thanks !

[awgsknite]

var corners : Vector3[] = new Vector3[ 4 ];

 

to Lua How ?

Vector3 is Vec3 in Lua but what about the square brackets and colon ?

[shadmar]

var corners : Vector3[] = new Vector3[ 4 ];

 

to Lua How ?

Vector3 is Vec3 in Lua but what about the square brackets and colon ?

 

I believe corners is declared as a array of 4 vec3 values.

I think you only need to do this in lua:

corners = { }

[thehankinator]

I believe corners is declared as a array of 4 vec3 values.

I think you only need to do this in lua:

corners = { }

That would make an array but to make equivalent code, wouldn't you need to fill it with the 4 Vec3 elements? Like:

corners = {Vec3(), Vec3(), Vec3(), Vec3()}

[shadmar]

yes, but you don't really need to declare anything in a table like that.

just table.insert when needed I guess. (I don't know whats next in line in the js script :-) )

[awgsknite]

Thanks !

but idk what to use but this is the first part of it:

 

public function AddFootprint( pos : Vector3, fwd : Vector3, rht : Vector3, footprintType : int )

{

// - Calculate the 4 corners -

 

// foot offset

var footOffset : float = footprintSpacing;

 

if ( isLeft )

{

footOffset = -footprintSpacing;

}

 

var corners : Vector3[] = new Vector3[ 4 ];

 

// corners = position + left/right offset + forward + right

corners[ 0 ] = pos + ( rht * footOffset ) + ( fwd * footprintSize.y * 0.5 ) + ( -rht * footprintSize.x * 0.5 ); // Upper Left

corners[ 1 ] = pos + ( rht * footOffset ) + ( fwd * footprintSize.y * 0.5 ) + ( rht * footprintSize.x * 0.5 ); // Upper Right

corners[ 2 ] = pos + ( rht * footOffset ) + ( -fwd * footprintSize.y * 0.5 ) + ( -rht * footprintSize.x * 0.5 ); // Lower Left

corners[ 3 ] = pos + ( rht * footOffset ) + ( -fwd * footprintSize.y * 0.5 ) + ( rht * footprintSize.x * 0.5 ); // Lower Right

 

That function idk how to write that for lua. It has me so stumped and i cant find any lua script that looks like that to see how to make it

[thehankinator]

Thanks !

but idk what to use but this is the first part of it:

 

public function AddFootprint( pos : Vector3, fwd : Vector3, rht : Vector3, footprintType : int )

{

// - Calculate the 4 corners -

 

// foot offset

var footOffset : float = footprintSpacing;

 

if ( isLeft )

{

footOffset = -footprintSpacing;

}

 

var corners : Vector3[] = new Vector3[ 4 ];

 

// corners = position + left/right offset + forward + right

corners[ 0 ] = pos + ( rht * footOffset ) + ( fwd * footprintSize.y * 0.5 ) + ( -rht * footprintSize.x * 0.5 ); // Upper Left

corners[ 1 ] = pos + ( rht * footOffset ) + ( fwd * footprintSize.y * 0.5 ) + ( rht * footprintSize.x * 0.5 ); // Upper Right

corners[ 2 ] = pos + ( rht * footOffset ) + ( -fwd * footprintSize.y * 0.5 ) + ( -rht * footprintSize.x * 0.5 ); // Lower Left

corners[ 3 ] = pos + ( rht * footOffset ) + ( -fwd * footprintSize.y * 0.5 ) + ( rht * footprintSize.x * 0.5 ); // Lower Right

 

That function idk how to write that for lua. It has me so stumped and i cant find any lua script that looks like that to see how to make it

I think shadmar's line of code would fit better for this function than mine.

 

What part exactly has you stumped?

[awgsknite]

Like i said b4 the function part. This line:

 

public function AddFootprint( pos : Vector3, fwd : Vector3, rht : Vector3, footprintType : int )

[thehankinator]

Like i said b4 the function part. This line:

 

public function AddFootprint( pos : Vector3, fwd : Vector3, rht : Vector3, footprintType : int )

You may want to look up some basic lua examples. This site seems decent

 

http://www.tutorialspoint.com/lua/lua_functions.htm

 

Regardless, this is how you make a similar function in lua:

function AddFootprint( pos, fwd, rht, footprintType)
 --blah blah
end

[awgsknite]

Thanks !

but i tried that and the other line that changes to corners = { } or the other way

corners = {Vec3(), Vec3(), Vec3(), Vec3()}

 

and then it gives an error at the start of this near = :

 

--// corners = position + left/right offset + forward + right

corners[ 0 ] = pos + ( rht * footOffset ) + ( fwd * footprintSize.y * 0.5 ) + ( -rht * footprintSize.x * 0.5 ); // Upper Left

corners[ 1 ] = pos + ( rht * footOffset ) + ( fwd * footprintSize.y * 0.5 ) + ( rht * footprintSize.x * 0.5 ); // Upper Right

corners[ 2 ] = pos + ( rht * footOffset ) + ( -fwd * footprintSize.y * 0.5 ) + ( -rht * footprintSize.x * 0.5 ); // Lower Left

corners[ 3 ] = pos + ( rht * footOffset ) + ( -fwd * footprintSize.y * 0.5 ) + ( rht * footprintSize.x * 0.5 ); // Lower Right

[Rick]

Show us the full code in question and if it's a function give us some test parameters to pass to it.

[awgsknite]

I scrapped that script cos i couldnt convert it and i started over but now i got this :

 

How do i get normal footprints and not cubes ? I used a decal material. Should i be using a texture instead ?

[awgsknite]

nvm it was the material.

 

I had copied another material instead of making a new material.

[Rick]

This would be handy for others. You should share the code for others!