LMTSFileLoader (lightmaps in Irrlicht)

Guest · Post by **Guest** » Fri Jul 30, 2004 9:24 am

could someone please post the sourcecode for loading the samplemap?..i always get a windows-error when trying to run my app for loading the lmts file :/

mm765 · Post by **mm765** » Fri Jul 30, 2004 11:57 am

i think i found an error in the loader.
from the docs:

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(*) If no texture or lightmap is used the index value is 0xFFFF.

so you have to ignore those.
i fixed it by adding

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 if(Subsets[i].TextID1 != 0xFFFF && Subsets[i].TextID2 != 0xFFFF) {

after

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for (i=0; i<Header.SubsetCount; i++) {

in the constructMesh method in CLMTSMeshFileLoader.cpp.
I dont know if this is correct but it helps for now so that at least the map.3.lmts from the samples works. map.1.lmts at least doesnt crash anymore. though it doesnt display anything (here).

p.s.: dont forget to add the closing } for the if() !!

afecelis · Post by **afecelis** » Sat Jul 31, 2004 3:40 am

Jox:
Would it be possible to get a more step-by-step tutorial on how to add your .cpp and .h files to my project?

I tried to do it following the instructions but then I didn't know if I had to add the files to my project or copy them into Irrlicht's source and recompile the dll, etc etc etc.

In other words, a tut for the newbiest of the noobs... like me!!!

ps. Creating the lightmaps was no problem, I only had problems in Irrlicht.

thnx

Gracias Jox, perdona todo el problema en que te pongo pero me parece que tu lightmapper esta de p... madre! te felicito. Espero poder utilizarlo como alternativa en nuestro proyecto, Goretek. Un saludo

afecelis · Post by **afecelis** » Sat Jul 31, 2004 3:45 am

Jox, sorry for the Spanish part, I thought you were Lord Trancos. Anyway, the need for the tut is still there!

nitroman · Post by **nitroman** » Sat Jul 31, 2004 2:15 pm

afecelis:
it's not very difficult... you don't need to recompile the dll because it is an external loader.

this is how I did it (I'm a newbe too) with dev-cpp:

-create a folder for your work

-just copy the CLMTSMeshFileLoader.cpp and CLMTSMeshFileLoader.h to this folder.

-Create a subfolder inside your work folder called Map . Copy your lmts map and the textures inside.

-open dev-cpp and create a new empty project.

-Configure your project as you do for other Irrlicht projects. (Go to the project options (alt+p), in the Parameters tab, in the linker part add -lIrrlicht -ljpeg -lz you can also put -s in the linker to stip the size of your executable. In the C++ compiler add -O2 to enable optimizations (-O3 is supposed to be better, but I sometime get problems))

-create a new souce file. Save it to something.cpp . Add the following code:
(sorry if the comments are in french...

Anyway there is nothing complicated...)

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//loader de map lmts avec Irrlicht
//par Benoit Plante (nitroman)

#include <irrlicht.h>
#include "CLMTSMeshFileLoader.h"

//Les namespaces utilisés par Irrlicht
using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

//la fonction main()
int main()
{
    //création du moteur graphique
    IrrlichtDevice *moteur = 
        createDevice(EDT_OPENGL,  //utilisation de opengl
        dimension2d<s32>(800, 600), //dimensions de la fenêtre
        32,                         //résolution (bits)
        true,                      //mode fullscreen
        false,                      //stencil buffer
        0);                         //event
    
    //Titre de la fenêtre
    moteur -> setWindowCaption(L"Irrlicht ");
    
    //pointeurs vers le driveur, le Scene Manager et le GUI
    IVideoDriver* driver = moteur->getVideoDriver();
    ISceneManager* s_manager = moteur->getSceneManager();
    IFileSystem* fs = moteur->getFileSystem();
    
    //paramètre de Qualité
    driver->setTextureCreationFlag(video::ETCF_OPTIMIZED_FOR_QUALITY, true);
    
    //Ajouter le module de chargement de map lmts
    scene::CLMTSMeshFileLoader* lmts_loader = new scene::CLMTSMeshFileLoader(fs, driver);
	s_manager->addExternalMeshLoader(lmts_loader);
	
	//dossier contenant les textures
	lmts_loader->setTexturePath("map\\");
	
	//charger la map
	IAnimatedMesh* mesh = s_manager->getMesh("map\\map.3.lmts");
	
	//ajouter la map à la scène
	IAnimatedMeshSceneNode* node = s_manager->addAnimatedMeshSceneNode( mesh );
	
	//Ajouter une caméra
    scene::ICameraSceneNode* camera = s_manager -> addCameraSceneNodeFPS();
    camera->setFOV(3.1415f/2.0f); 
    //effacer le curseur
    moteur->getCursorControl()->setVisible(false);
    
    //boucle principale
    while(moteur->run())
    {
        //effacer l'écran
        driver -> beginScene(true, true, SColor(200,10,10,100));
        
        //tout dessiner
        s_manager -> drawAll();
        //gui_env -> drawAll();
        
        //afficher à l'écran
        driver -> endScene();
    }
    //le programme se termine
    //destruction du moteur 
    moteur -> drop();
    return 0;
}

-Press the "compile and run" button (F9)

-Enjoy

nitroman · Post by **nitroman** » Sat Jul 31, 2004 2:18 pm

also you will surely get errors during the compilation of CLMTSMeshFileLoader.cpp because the compiler can't find "os.h"

check my previous post in this page to know how I fixed this... I just changed <os.h> to <iostream> and added using namespace std;
not very difficult...

Hope it helps!

afecelis · Post by **afecelis** » Sat Jul 31, 2004 4:13 pm

merci Nitroman!

I'll give it a try now.

One last q, will colision work when loading lmts files?

afecelis · Post by **afecelis** » Sat Jul 31, 2004 5:10 pm

I placed everything as you told me, added all the necesary files, paths are ok, it compiles ok but I get the following message on the Irrlicht window:

Could not load mesh, file format seems to be unsupported: data\level.3.lmts

I'm using data as my folder instead of "map"

any ideas?

afecelis · Post by **afecelis** » Sat Jul 31, 2004 5:54 pm

Sorry Nitroman, my bad! I was using the wrong dll. I replaced it and it worked!

I only got the weird textures problem. Gonna resave them to see if they get corrected.

And I still got my final question, will collision work on lmts files?

cheers!

nitroman · Post by **nitroman** » Sat Jul 31, 2004 7:07 pm

I only got the weird textures problem.

-did you use Version 1.1 of the CLMTSMeshFileLoader that Jox released?
-did you resaved (using photoshop, Irfanview or another program) the .tga files as Jox said?

And I still got my final question, will collision work on lmts files?

I didn't test it but I think it would work, because both bsp and lmts maps are only loaded as simple meshes...

nitroman · Post by **nitroman** » Sat Jul 31, 2004 7:19 pm

I started to read the collision example source...
I will test it...

maybe we should use addOctTreeSceneNode at the place of addAnimatedMeshSceneNode in my source code to load the map...
I think it's the only difference...

then we need to create a triangle selector as the tutorial explained...
It should work...

I will give you an answer in a few hours...

afecelis · Post by **afecelis** » Sat Jul 31, 2004 7:39 pm

yep, I resaved my tgas. If I don't, textures don't even show up. And yup, I got version 1.1 of the loader but I'm still getting weird lightmaps:

Pulsar tools view:

Irrlicht:

dunno

Meanwhile I'll also try to add collision detection.

Ps. do you get colored lights to work as well?

Fussel · Post by **Fussel** » Sat Jul 31, 2004 7:41 pm

did you try:

driver->setTextureCreationFlag(video::ETCF_ALWAYS_32_BIT,true);
or
driver->setTextureCreationFlag(video::ETCF_OPTIMIZED_FOR_QUALITY, true);

afecelis · Post by **afecelis** » Sat Jul 31, 2004 7:53 pm

indeed

I'm going to re-check the files I used to see if they're version 1.0 or 1.1

brb

nitroman · Post by **nitroman** » Sat Jul 31, 2004 8:13 pm

strange... I don't have this problem...

did you try to load the sample map? Do you get the same problem?