Saving mesh to a file

[scippie]

Hi, I'm trying to save a generated mesh to a .irr file.
So, I use the IMeshWriter with an IWriteFile.
But how do I create the IWriteFile instance?

If I do it like this, I get a linker error "unresolved external symbol "class irr::io::IWriteFile * __cdecl irr::io::createWriteFile(char const *,bool)" (?createWriteFile@io@irr@@YAPAVIWriteFile@12@PBD_N@Z) referenced in function "public: void __thiscall CApp::SetupTest(void)" (?SetupTest@CApp@@QAEXXZ)"

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IMeshWriter *mw = SCN()->createMeshWriter(EMWT_IRR_MESH);
IWriteFile *wf = irr::io::createWriteFile("man/dressed-man.irr", false);
mw->writeMesh(wf, manmesh);
mw->drop();
wf->drop();

(btw. SCN() returns the ISceneManager)

Anyone?

[JP]

are you using the correct namespace for IWriteFile? (not sure what that is)

[scippie]

are you using the correct namespace for IWriteFile? (not sure what that is)

Are there more than one??

In the beginning of the code I have:

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#include "irrlicht.h"

using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

So I guess, irr::io:: is automatically used?

[hybrid]

There is simply no such function. Try to use the IFileSystem which is passed to you via the smgr. There are functiosn to create files.

[JP]

You should know there are more than one as you're using 6 there

Looks like it's probably covered so that's not the problem, was a wild guess anyway!

[scippie]

There is simply no such function. Try to use the IFileSystem which is passed to you via the smgr. There are functiosn to create files.

The device manager that is... thanks!

[zillion42]

just in case anyone ever searches and wonders... worked pretty straight forward...

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	void writeMeshFile(static core::stringw path,
						scene::EMESH_WRITER_TYPE type,
						scene::CVertexBuffer* outVB,
						scene::CIndexBuffer* outIB)
	{
		scene::CDynamicMeshBuffer* outbuffer = new scene::CDynamicMeshBuffer(outVB->getType(),outIB->getType());
		outbuffer->setVertexBuffer(outVB);
		outbuffer->setIndexBuffer(outIB);

		scene::SMesh* outmesh = new scene::SMesh();
		outmesh->addMeshBuffer(outbuffer);

		scene::IMeshWriter* writer = SceneManager->createMeshWriter(type);
		
		io::IWriteFile* file = SceneManager->getFileSystem()->createAndWriteFile(path);
		writer->writeMesh(file,outmesh);
		
		writer->drop();
		outmesh->drop();
		file->drop();
	}

	scene::CDynamicMeshBuffer* loadMesh(static core::stringw path)
	{
		scene::IMesh* mesh = SceneManager->getMesh(path);
		scene::IMeshBuffer* outbuffer = mesh->getMeshBuffer(0);
		video::S3DVertex* verts = (video::S3DVertex*)outbuffer->getVertices();
		u16* indices = (u16*)outbuffer->getIndices();
		u32 vc =  outbuffer->getVertexCount();
		u32 ic = outbuffer->getIndexCount();

		scene::CDynamicMeshBuffer* dOutbuffer = new scene::CDynamicMeshBuffer(outbuffer->getVertexType(),outbuffer->getIndexType());
		scene::CIndexBuffer* iB = new scene::CIndexBuffer(outbuffer->getIndexType());
		scene::CVertexBuffer* vB = new scene::CVertexBuffer(outbuffer->getVertexType());
		
		for(u32 v=0; v<vc; v++)
			vB->push_back(verts[v]);
		for(u32 i=0; i<ic; i++)
			iB->push_back(indices[i]);

		dOutbuffer->setVertexBuffer(vB);
		dOutbuffer->setIndexBuffer(iB);
		return dOutbuffer;
	}

unfortunately I was not able to read any of the produced files with Maya or again with irrlicht

EDIT: I did succeed in saving and successfully loading irrmesh files with those methods. I casted from should be u16* to u32*... didnt think it would make a difference... I changed that above, so the methods work. Of course loading can be a lot easier if you dont need CDynamicMeshBuffer's but I just like the handling of the lists more...