loading models in diffrent way[solved]

[omar shaaban]

well the orginal method is like this:

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node=smgr->addAnimatedMeshSceneNode(smgr->getMesh("model.3ds"));

but what if i have a string that contains the model so i want it to load it rather than the "model.3ds" so i wrote this:

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std::string file;
//by xml loader i import the model data(model.3ds) to it.
node=smgr->addAnimatedMeshSceneNode(smgr->getMesh(file));

but ofcourse it didnt work because the parameter excepts only irr::c8 * .. type so i made this:

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irr::c8 * loader;
loader+=model   //[b]error here cant add them because they are diffrent!!![/b]
node=smgr->addAnimatedMeshSceneNode(smgr->getMesh(loader));

so any idea!?

[bitplane]

to get a pointer to a character array from a std::string or an irr::string, simply use c_str(). for example: file.c_str()

[omar shaaban]

well it is not i will post all the needed code here first here is the block.3ds file:

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[omar shaaban]

ist my qustion clear or is it complicated !!?some help here

[death_au]

You shouldn't be trying to put the data from the mesh file in the xml. Instead, you should put the filename of the mesh file in the xml, and as long as the program can find that filename, your code should work.
I.e.

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<?xml version="1.0"?>
<main>
    <3dsfile> block.3ds </3dsfile>
</main> 

[omar shaaban]

You shouldn't be trying to put the data from the mesh file in the xml. Instead, you should put the filename of the mesh file in the xml, and as long as the program can find that filename, your code should work.
I.e.

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<?xml version="1.0"?>
<main>
    <3dsfile> block.3ds </3dsfile>
</main> 

ahhhhhh another stupid answer i know but what i am trying to do here if u understood that i am making my own loader like the other topic u guys dont understand so don't answer please
and don't read from the tutorial and then tell me here

[JediTrooper87]

First I have a questions:
What do you mean by "it loads perfectly"? Do you mean the application or the model loads?


It might have to do with the Irrlicht model loaders, they all check the file type of the model it's supposed to be loading by checking the ending of the filename (block.3ds) so it knows what loader to use. Since you're file no longer ends in .3ds, Irrlicht may not know which model loader it's supposed to be using.

[vitek]

When he says it loads perfectly he means that it is loading the data from the xml file into the string correctly.

The problem is this...

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node=smgr->addAnimatedMeshSceneNode(smgr->getMesh(model.c_str()));

You should know by now that the parameter to getMesh() is the name of the file to load, i.e. smgr->getMesh("../../media/dwarf.x"). Unfortunately you are passing a string that represents the file data. That won't work.

If you have the model data [the contents of a model file] in memory, you need to find a way to get that model data into an animated mesh, and then manually add that to the mesh cache. You would need to create an IMemoryReadFile from your data, get access to the scene managers mesh loaders, and then try to load the mesh using the loaders. All that means more mods to the Irrlicht source to get what you want.

I'm curious why using IrrEdit isn't good enough for you. It already does all of this, and it works.

Travis

[hybrid]

And once more a reminder to keep cool. You are moving into a rather problematic position by attacking people who want to help you. Even your annoying reminders are not really a good idea...
BTW: the ideas presented here are all better than your solution. Moreover, you might face a problem with a bytetream in XML - I'm not sure if the different encodings used for XML all handle byte streams correctly!

[JonLT]

in stead of using the 3ds format, export the model to a file that holds all the numbers to create the mesh. Anim8tor can do this by exporting to a .h file. When you have all the numbers (coordinates and stuff) you could load the mesh by creating a custom scene node that loads all the data from the exported file, or from passed arrays.

EDIT: I know irrklang can load a file from memory (converting it with bin2h), maybe you can in some way make irrlicht able to load a mesh converted with bin2h?

[hybrid]

Yes, the bin2h solution (together with IMemoryReadFile) will do it.

[bitplane]

to flog this some more, you simply can't store binary data inside an xml file or any other text file without encoding it as text. if you need to store binary data, then you should use a binary file. If you want to access this binary file using an IXMLReader, then you'll have to make your own binary implementations of IXMLReader/Writer (which would be very cool indeed). then you can use filesystem->createMemoryReadFile as suggested, and of course add smgr->getMesh(IReadFile*) which would be very easy.

I take it you're trying to make a scene format that loads your game entities from a single file? The best option would be to put an .irr file and all your models and textures inside a zip file, then rename the zip to .dat or something. You can then use an ISceneUserDataSerializer to get any extra data back out as your nodes are loaded. Another option, if you have your own custom nodes that you use as game entities, you could package them up as irrEdit plugins and use irrEdit to edit your entire game.

[omar shaaban]

will thanks guys u really helped me guys but will u helped me if i didnt make these annoying posts !! well i understand your suggsetion with .irr but ,irr doesnt contain the mesh within it just store the path but what i am trying to do with xml is simply a method to load the model so to protect it by changing some of the data of the mesh in the xml and then make my application return it back so it would protect my model and to make another 3d fromat(ofcourse it will not be another 3d fromat it will be just the same format)
but i think i mustsee the solar model program made by greenya so to see how does it load the models(.dat?)
and thanks guys very much!!!

[Perceval]

He has already told you how it work :
http://irrlicht.sourceforge.net/phpBB2/ ... +model+dat
.dat is just a zip archive, that irrlicht is able to load.

[omar shaaban]

He has already told you how it work :
http://irrlicht.sourceforge.net/phpBB2/ ... +model+dat
.dat is just a zip archive, that irrlicht is able to load.

ya i know!! thanks