Getting_Started_With_Lua AddHook Example

[Davaris]

I'm going through the Getting_Started_With_Lua.pdf and I just got up to the AddHook part and I can't get the DrawOverlay hook to work. Can anyone see what I am dong wrong?

 

 

 

require("scripts/constants/keycodes") 
require("scripts/hooks")

--Register abstract path 
RegisterAbstractPath("")

--Set graphics mode 
if Graphics(1024,768)==0 then
Notify("Failed to set graphics mode.",1) 
return
end 

world=CreateWorld() 
if world==nil then 
Notify("Failed to initialize engine.",1) 
return 
end 

gbuffer=CreateBuffer(GraphicsWidth(),GraphicsHeight(),1+2+4+8)

camera=CreateCamera() 
camera:SetPosition(Vec3(0,0,-2))

light=CreateSpotLight(10) 
light:SetRotation(Vec3(45,55,0)) 
light:SetPosition(Vec3(5,5,-5))

material=LoadMaterial("abstract::cobblestones.mat") 

mesh=CreateCube() 
mesh:Paint(material) 

ground=CreateCube() 
ground:SetScale(Vec3(10.0,1.0,10.0)) 
ground:SetPosition(Vec3(0.0,-2.0,0.0)) 
ground:Paint(material) 

light=CreateDirectionalLight() 
light:SetRotation(Vec3(45,45,45)) 


function DrawOverlay()

DrawText("DrawOverlay",0,50)

SetBlend(1) 
SetColor(Vec4(1,0,0,0.25)) 
DrawRect(100,100,GraphicsWidth()-200,GraphicsHeight()-200) 
SetColor(Vec4(1,1,1,1)) 
SetBlend(0) 
end 

AddHook("Flip",DrawOverlay)




while AppTerminate()==0 do 

if KeyHit(KEY_ESCAPE)==1 then 
	break 
end 

mesh:Turn(Vec3(AppSpeed()*0.5,AppSpeed()*0.5,AppSpeed()*0.5))
UpdateAppTime() 
world:Update(AppSpeed()) 
SetBuffer(gbuffer) 
world:Render() 

SetBuffer(BackBuffer()) 

world:RenderLights(gbuffer) 

DrawText(UPS(),0,0) 
Flip(0) 
end

[macklebee]

your code works fine for me when ran directly from the script editor and when dragged onto the engine.exe...

 

what exactly are you having troubles with?

[Marleys Ghost]

yeah works fine for me too.

[Davaris]

On mine it isn't showing the transparent red rectangle.

 

In the example just before it uses:

 

function FlipHook() 
SetBlend(1) 
SetColor(Vec4(1,0,0,0.25)) 
DrawRect(100,100,GraphicsWidth()-200,GraphicsHeight()-200) 
SetColor(Vec4(1,1,1,1)) 
SetBlend(0) 
end

 

and it works in that the red rectangle is visible. On the one I posted above, it doesn't work, even when I copied it to my SDK directory which is updated. So if it works for you guys it might be a bug.

[Marleys Ghost]

 

and it works in that the red rectangle is visible. On the one I posted above, it doesn't work, even when I copied it to my SDK directory which is updated. So if it works for you guys it might be a bug.

 

 

I'd have thought it would be a bug if it had not worked for us, what are your system specs?

[gordonramp]

Your script works both ways for me.

[Davaris]

Win 7 Pro 64 bit

AMD Phenom II X3 720 2.8GHz

GeForce 9800 GTX/9800 GTX+

4 GB RAM

[macklebee]

seems you are not doing something right because i dont see how this could be a bug...

 

where is the lua file? wherever it is put it in the main SDK directory. Now drag it and drop it on the engine.exe. should work fine.

[Davaris]

I just fixed it. I altered the compatibility mode to WinXP SP3 and now it works!

 

The SDK was in the Program Files (x86) directory, so I don't know why it did not properly.

[Marleys Ghost]

I just fixed it. I altered the compatibility mode to WinXP SP3 and now it works!

 

 

Ok .. everyone stand down from Bug alert

[macklebee]

I just fixed it. I altered the compatibility mode to WinXP SP3 and now it works!

 

weird... do you have to do that for any other scripts?

[Davaris]

I haven't been able to get the burning barrel to show fire or smoke, or the windmill to spin, so I'll have try them out with a compatibility change as well.

[Davaris]

Just tried it and the Windmill still doesn't spin and the fire barrel behavior is unchanged: there is light and sound, but no visible particles for the fire or smoke. I don't know if Josh has updated those scripts though.

[Canardia]

Josh hasn't updated the Windmill Lua script to work with the engine, but you can find here the updated Windmill Lua script:

http://leadwerks.com/werkspace/index.php?/tracker/issue-49-windmill-script-is-not-updated/

[macklebee]

the firepit = fire barrel? if so, that one is updated and works just fine for me... does it work in the editor for you?

 

the windmill isn't updated (actually i think lumooja did it?)... and i dont think its actually even in the latest download since we went to singlestate lua...

 

perhaps you should try a clean download of the SDK?

[Marleys Ghost]

i dont think its actually even in the latest download

 

 

No its not, after I did a full fresh install it was not there.

[Davaris]

the firepit = fire barrel? if so, that one is updated and works just fine for me... does it work in the editor for you?

 

It works perfectly in the editor for some reason.

[macklebee]

It works perfectly in the editor for some reason.

 

where else are you trying to run it? via bmax or c++ and loaded into a scene? or just with a lua game script? give an example of the code where it doesn't work...

[macklebee]

ok... i didnt expect your entire code what i am not seeing is the anything that integrates the lua to c++.. arent you missing this code somewhere:

//Set Lua variable
BP L=GetLuaState();
lua_pushobject(L,framework);
lua_setglobal(L,"fw");
lua_pop(L,1);

 

and off hand i dont see the framework being initialized...

 

unless of course thats all being handled in gamelib?

[macklebee]

you need to have some reference to "fw" because the firepit uses framework worlds for the emitters

[Davaris]

I think it is initialized in GameLib. BTW I just deleted that post because it was freezing my browser. Sorry about that.

[Josh]

Yep, this is talked about in the end of the big Lua tutorial.

[Davaris]

In GameLib this function is called:

 

 

void TGame::Initialize(int sx0, int sy0, int fullscreen)
{
scene.Initialize(sx0,sy0,fullscreen);
scene.game=this;
gamelib_callback=this;
luat.Create();									// create the LuaTools object
luat.SetScriptObject("fw",scene.framewerk);		// set the Lua variable fw

[macklebee]

and where is this?

 

//Set Lua variable
BP L=GetLuaState();
lua_pushobject(L,framework);
lua_setglobal(L,"fw");
lua_pop(L,1);

[Davaris]

and where is this?

 

//Set Lua variable
BP L=GetLuaState();
lua_pushobject(L,framework);
lua_setglobal(L,"fw");
lua_pop(L,1);

 

I think this is it:

 

 

void LuaTools::SetScriptObject( const std::string& name, BP o )
{
int size = GetStackSize();
PushObject( o );
SetGlobal( name );
SetStackSize( size );
}