C++ SMesh::getMeshBufferCount方法代码示例

	void init(const HeightMap &hm, f32 scale, colour_func cf, IVideoDriver *driver)
	{
		Scale = scale;

		const u32 mp = driver -> getMaximalPrimitiveCount();
		Width = hm.width();
		Height = hm.height();

		const u32 sw = mp / (6 * Height); // the width of each piece

		u32 i=0;
		for(u32 y0 = 0; y0 < Height; y0 += sw)
		{
			u16 y1 = y0 + sw;
			if (y1 >= Height)
				y1 = Height - 1; // the last one might be narrower
			addstrip(hm, cf, y0, y1, i);
			++i;
		}
		if (i<Mesh->getMeshBufferCount())
		{
			// clear the rest
			for (u32 j=i; j<Mesh->getMeshBufferCount(); ++j)
			{
				Mesh->getMeshBuffer(j)->drop();
			}
			Mesh->MeshBuffers.erase(i,Mesh->getMeshBufferCount()-i);
		}
		// set dirty flag to make sure that hardware copies of this
		// buffer are also updated, see IMesh::setHardwareMappingHint
		Mesh->setDirty();
		Mesh->recalculateBoundingBox();
	}

	void init(const HeightMap &hm, f32 scale, colour_func cf, IVideoDriver *driver)
	{
		Scale = scale;

		const u32 mp = driver -> getMaximalPrimitiveCount();
		Width = hm.width();
		Height = hm.height();
		
		const u32 sw = mp / (6 * Height); // the width of each piece

		u32 i=0;
		for(u32 y0 = 0; y0 < Height; y0 += sw)
		{
			u16 y1 = y0 + sw;
			if (y1 >= Height)
				y1 = Height - 1; // the last one might be narrower
			addstrip(hm, cf, y0, y1, i);
			++i;
		}
		if (i<Mesh->getMeshBufferCount())
		{
			// clear the rest
			for (u32 j=i; j<Mesh->getMeshBufferCount(); ++j)
			{
				Mesh->getMeshBuffer(j)->drop();
			}
			Mesh->MeshBuffers.erase(i,Mesh->getMeshBufferCount()-i);
		}

		Mesh->recalculateBoundingBox();
	}

//! Creates/loads an animated mesh from the file.
IAnimatedMesh* CSMFMeshFileLoader::createMesh(io::IReadFile* file)
{
     // create empty mesh
     SMesh *mesh = new SMesh();

     // load file
     u16 version;
     u8  flags;
     s32 limbCount;
     s32 i;

     io::BinaryFile::read(file, version);
     io::BinaryFile::read(file, flags);
     io::BinaryFile::read(file, limbCount);

     // load mesh data
     core::matrix4 identity;
     for (i=0; i < limbCount; ++i)
          loadLimb(file, mesh, identity);

     // recalculate buffer bounding boxes
     for (i=0; i < (s32)mesh->getMeshBufferCount(); ++i)
          mesh->getMeshBuffer(i)->recalculateBoundingBox();

     mesh->recalculateBoundingBox();
     SAnimatedMesh *am = new SAnimatedMesh();
     am->addMesh(mesh);
     mesh->drop();
     am->recalculateBoundingBox();

     return am;
}

	void addstrip(const HeightMap &hm, colour_func cf, u16 y0, u16 y1, u32 bufNum)
	{
		SMeshBuffer *buf = 0;
		if (bufNum<Mesh->getMeshBufferCount())
		{
			buf = (SMeshBuffer*)Mesh->getMeshBuffer(bufNum);
		}
		else
		{
			// create new buffer
			buf = new SMeshBuffer();
			Mesh->addMeshBuffer(buf);
			// to simplify things we drop here but continue using buf
			buf->drop();
		}
		buf->Vertices.set_used((1 + y1 - y0) * Width);

		u32 i=0;
		for (u16 y = y0; y <= y1; ++y)
		{
			for (u16 x = 0; x < Width; ++x)
			{
				const f32 z = hm.get(x, y);
				const f32 xx = (f32)x/(f32)Width;
				const f32 yy = (f32)y/(f32)Height;

				S3DVertex& v = buf->Vertices[i++];
				v.Pos.set(x, Scale * z, y);
				v.Normal.set(hm.getnormal(x, y, Scale));
				v.Color=cf(xx, yy, z);
				v.TCoords.set(xx, yy);
			}
		}

		buf->Indices.set_used(6 * (Width - 1) * (y1 - y0));
		i=0;
		for(u16 y = y0; y < y1; ++y)
		{
			for(u16 x = 0; x < Width - 1; ++x)
			{
				const u16 n = (y-y0) * Width + x;
				buf->Indices[i]=n;
				buf->Indices[++i]=n + Width;
				buf->Indices[++i]=n + Width + 1;
				buf->Indices[++i]=n + Width + 1;
				buf->Indices[++i]=n + 1;
				buf->Indices[++i]=n;
				++i;
			}
		}

		buf->recalculateBoundingBox();
	}

//.........这里部分代码省略.........

	u16 attrib=0;
	core::stringc token;
	token.reserve(32);

	while (file->getPos() < filesize)
	{
		if (!binary)
		{
			if (getNextToken(file, token) != "facet")
			{
				if (token=="endsolid")
					break;
				mesh->drop();
				return 0;
			}
			if (getNextToken(file, token) != "normal")
			{
				mesh->drop();
				return 0;
			}
		}
		getNextVector(file, normal, binary);
		if (!binary)
		{
			if (getNextToken(file, token) != "outer")
			{
				mesh->drop();
				return 0;
			}
			if (getNextToken(file, token) != "loop")
			{
				mesh->drop();
				return 0;
			}
		}
		for (u32 i=0; i<3; ++i)
		{
			if (!binary)
			{
				if (getNextToken(file, token) != "vertex")
				{
					mesh->drop();
					return 0;
				}
			}
			getNextVector(file, vertex[i], binary);
		}
		if (!binary)
		{
			if (getNextToken(file, token) != "endloop")
			{
				mesh->drop();
				return 0;
			}
			if (getNextToken(file, token) != "endfacet")
			{
				mesh->drop();
				return 0;
			}
		}
		else
		{
			file->read(&attrib, 2);
#ifdef __BIG_ENDIAN__
			attrib = os::Byteswap::byteswap(attrib);
#endif
		}

		SMeshBuffer* mb = reinterpret_cast<SMeshBuffer*>(mesh->getMeshBuffer(mesh->getMeshBufferCount()-1));
		u32 vCount = mb->getVertexCount();
		video::SColor color(0xffffffff);
		if (attrib & 0x8000)
			color = video::A1R5G5B5toA8R8G8B8(attrib);
		if (normal==core::vector3df())
			normal=core::plane3df(vertex[2],vertex[1],vertex[0]).Normal;
		mb->Vertices.push_back(video::S3DVertex(vertex[2],normal,color, core::vector2df()));
		mb->Vertices.push_back(video::S3DVertex(vertex[1],normal,color, core::vector2df()));
		mb->Vertices.push_back(video::S3DVertex(vertex[0],normal,color, core::vector2df()));
		mb->Indices.push_back(vCount);
		mb->Indices.push_back(vCount+1);
		mb->Indices.push_back(vCount+2);
	}	// end while (file->getPos() < filesize)
	mesh->getMeshBuffer(0)->recalculateBoundingBox();

	// Create the Animated mesh if there's anything in the mesh
	SAnimatedMesh* pAM = 0;
	if ( 0 != mesh->getMeshBufferCount() )
	{
		mesh->recalculateBoundingBox();
		pAM = new SAnimatedMesh();
		pAM->Type = EAMT_OBJ;
		pAM->addMesh(mesh);
		pAM->recalculateBoundingBox();
	}

	mesh->drop();

	return pAM;
}

    GLlink(ISceneNode *i_parent, ISceneManager *i_mgr, s32 i_id,
           const LinkInfo &i_li, BodyInfo_var i_binfo) :
        ISceneNode(i_parent, i_mgr, i_id),
        m_jointId(i_li.jointId) {
        setAutomaticCulling(scene::EAC_OFF);


        setPosition(vector3df( i_li.translation[0],
                               -i_li.translation[1],
                               i_li.translation[2]));
        Vector3 axis(i_li.rotation[0],
                     i_li.rotation[1],
                     i_li.rotation[2]);
        Matrix33 R;
        hrp::calcRodrigues(R, axis, i_li.rotation[3]);
        Vector3 rpy(rpyFromRot(R));
        //std::cout << "rpy:" << rpy << std::endl;
        setRotation(vector3df(-180/M_PI*rpy[0],
                              180/M_PI*rpy[1],
                              -180/M_PI*rpy[2]));

        m_axis << i_li.jointAxis[0], i_li.jointAxis[1], i_li.jointAxis[2];

        ShapeInfoSequence_var sis = i_binfo->shapes();
        AppearanceInfoSequence_var ais = i_binfo->appearances();
        MaterialInfoSequence_var mis = i_binfo->materials();
        TextureInfoSequence_var txs = i_binfo->textures();
        const TransformedShapeIndexSequence& tsis = i_li.shapeIndices;


        core::vector3df vertex;
        core::vector3df normal;

        for (unsigned int l=0; l<tsis.length(); l++) {
            SMesh* mesh = new SMesh();
            SMeshBuffer* meshBuffer = new SMeshBuffer();
            mesh->addMeshBuffer(meshBuffer);
            meshBuffer->drop();

            const TransformedShapeIndex &tsi = tsis[l];
            short index = tsi.shapeIndex;
            ShapeInfo& si = sis[index];
            const float *vertices = si.vertices.get_buffer();
            const LongSequence& triangles = si.triangles;
            const AppearanceInfo& ai = ais[si.appearanceIndex];
            const float *normals = ai.normals.get_buffer();
            //std::cout << "length of normals = " << ai.normals.length() << std::endl;
            const LongSequence& normalIndices = ai.normalIndices;
            //std::cout << "length of normalIndices = " << normalIndices.length() << std::endl;
            const int numTriangles = triangles.length() / 3;
            //std::cout << "numTriangles = " << numTriangles << std::endl;

            video::SColor color(0xffffffff);
            if (ai.colors.length()) {
                color.set(0xff,
                          0xff*ai.colors[0],
                          0xff*ai.colors[1],
                          0xff*ai.colors[2]);
            } else if (ai.materialIndex >= 0) {
                const MaterialInfo& mi = mis[ai.materialIndex];
                color.set(0xff,
                          0xff*mi.diffuseColor[0],
                          0xff*mi.diffuseColor[1],
                          0xff*mi.diffuseColor[2]);
            } else {
                std::cout << "no material" << std::endl;
            }


            SMeshBuffer* mb = reinterpret_cast<SMeshBuffer*>(mesh->getMeshBuffer(mesh->getMeshBufferCount()-1));
            u32 vCount = mb->getVertexCount();

            const DblArray12& tfm = tsi.transformMatrix;
            CMatrix4<f32> cmat;
            for (int i=0; i<3; i++) {
                for (int j=0; j<4; j++) {
                    cmat[j*4+i] = tfm[i*4+j];
                }
            }
            cmat[3] = cmat[7] = cmat[11] = 0.0;
            cmat[15] = 1.0;
            vector3df pos = cmat.getTranslation();
            pos.Y *= -1;
            vector3df rpy = cmat.getRotationDegrees();
            rpy.X *= -1;
            rpy.Z *= -1;
            vector3df scale = cmat.getScale();

            const float *textureCoordinate = NULL;
            if (ai.textureIndex >= 0) {
                textureCoordinate = ai.textureCoordinate.get_buffer();
                //std::cout << "length of textureCoordinate:" << ai.textureCoordinate.length() << std::endl;
                //std::cout << "length of vertices:" << si.vertices.length() << std::endl;

            }

            for(int j=0; j < numTriangles; ++j) {
                if (!ai.normalPerVertex) {
                    int p;
                    if (normalIndices.length() == 0) {
//.........这里部分代码省略.........

//.........这里部分代码省略.........
	while(i < mesh->MeshBuffers.size())
	{
		if (mesh->MeshBuffers[i]->getVertexCount() == 0 ||
			mesh->MeshBuffers[i]->getIndexCount() == 0)
		{
			// Meshbuffer is empty -- drop it
			mesh->MeshBuffers[i]->drop();
			mesh->MeshBuffers.erase(i);
			materiali.erase(i);
		}
		else
		{
			i++;
		}
	}


	{
		//load textures and lightmaps in materials.
		//don't worry if you receive a could not load texture, cause if you don't need
		//a particular material in your scene it will be loaded and then destroyed.
#ifdef _IRR_DMF_DEBUG_
		os::Printer::log("Loading textures.");
#endif
		const bool use_mat_dirs=!SceneMgr->getParameters()->getAttributeAsBool(DMF_IGNORE_MATERIALS_DIRS);

		core::stringc path;
		if ( SceneMgr->getParameters()->existsAttribute(DMF_TEXTURE_PATH) )
			path = SceneMgr->getParameters()->getAttributeAsString(DMF_TEXTURE_PATH);
		else
			path = FileSystem->getFileDir(file->getFileName());
		path += ('/');

		for (i=0; i<mesh->getMeshBufferCount(); i++)
		{
			//texture and lightmap
			video::ITexture *tex = 0;
			video::ITexture *lig = 0;

			//current buffer to apply material
			video::SMaterial& mat = mesh->getMeshBuffer(i)->getMaterial();

			//Primary texture is normal
			if (materiali[i].textureFlag==0)
			{
				if (materiali[i].textureBlend==4)
					driver->setTextureCreationFlag(video::ETCF_ALWAYS_32_BIT,true);
				findFile(use_mat_dirs, path, materiali[i].pathName, materiali[i].textureName);
				tex = driver->getTexture(materiali[i].textureName);
			}
			//Primary texture is just a colour
			else if(materiali[i].textureFlag==1)
			{
				video::SColor color(axtoi(materiali[i].textureName.c_str()));

				//just for compatibility with older Irrlicht versions
				//to support transparent materials
				if (color.getAlpha()!=255 && materiali[i].textureBlend==4)
					driver->setTextureCreationFlag(video::ETCF_ALWAYS_32_BIT,true);

				video::IImage *immagine= driver->createImage(video::ECF_A8R8G8B8,
					core::dimension2d<u32>(8,8));
				immagine->fill(color);
				tex = driver->addTexture("", immagine);
				immagine->drop();

IAnimatedMesh* CGeometryCreator::createTerrainMesh(video::IImage* texture,
        video::IImage* heightmap, const core::dimension2d<f32>& stretchSize,
        f32 maxHeight, video::IVideoDriver* driver,
        const core::dimension2d<s32> maxVtxBlockSize,
        bool debugBorders)
{
    u32 tm = os::Timer::getRealTime()/1000;

    if (!texture || !heightmap)
        return 0;

    video::SMaterial material;
    c8 textureName[64];
    c8 tmp[255];


    // debug border
    s32 borderSkip = debugBorders ? 0 : 1;

    video::S3DVertex vtx;
    vtx.Color.set(255,255,255,255);

    SMesh* mesh = new SMesh();

    core::dimension2d<s32> hMapSize= heightmap->getDimension();
    core::dimension2d<s32> tMapSize= texture->getDimension();
    core::position2d<f32> thRel((f32)tMapSize.Width / (s32)hMapSize.Width, (f32)tMapSize.Height / (s32)hMapSize.Height);
    core::position2d<s32> processed(0,0);

    while (processed.Y<hMapSize.Height)
    {
        while(processed.X<hMapSize.Width)
        {
            core::dimension2d<s32> blockSize = maxVtxBlockSize;
            if (processed.X + blockSize.Width > hMapSize.Width)
                blockSize.Width = hMapSize.Width - processed.X;
            if (processed.Y + blockSize.Height > hMapSize.Height)
                blockSize.Height = hMapSize.Height - processed.Y;

            SMeshBuffer* buffer = new SMeshBuffer();
            s32 x,y;

            // add vertices of vertex block
            for (y=0; y<blockSize.Height; ++y)
                for (x=0; x<blockSize.Width; ++x)
                {
                    video::SColor clr = heightmap->getPixel(x+processed.X, y+processed.Y);
                    f32 height = ((clr.getRed() + clr.getGreen() + clr.getBlue()) / 3.0f)/255.0f * maxHeight;

                    vtx.Pos.set((f32)(x+processed.X) * stretchSize.Width,
                                height, (f32)(y+processed.Y) * stretchSize.Height);

                    vtx.TCoords.set((f32)(x+0.5f) / ((f32)blockSize.Width),
                                    (f32)(y+0.5f) / ((f32)blockSize.Height));

                    buffer->Vertices.push_back(vtx);
                }

            // add indices of vertex block
            for (y=0; y<blockSize.Height-1; ++y)
                for (x=0; x<blockSize.Width-1; ++x)
                {
                    s32 c = (y*blockSize.Width) + x;

                    buffer->Indices.push_back(c);
                    buffer->Indices.push_back(c + blockSize.Width);
                    buffer->Indices.push_back(c + 1);

                    buffer->Indices.push_back(c + 1);
                    buffer->Indices.push_back(c + blockSize.Width);
                    buffer->Indices.push_back(c + 1 + blockSize.Width);
                }

            // recalculate normals
            for (s32 i=0; i<(s32)buffer->Indices.size(); i+=3)
            {
                core::plane3d<f32> p(
                    buffer->Vertices[buffer->Indices[i+0]].Pos,
                    buffer->Vertices[buffer->Indices[i+1]].Pos,
                    buffer->Vertices[buffer->Indices[i+2]].Pos);
                p.Normal.normalize();

                buffer->Vertices[buffer->Indices[i+0]].Normal = p.Normal;
                buffer->Vertices[buffer->Indices[i+1]].Normal = p.Normal;
                buffer->Vertices[buffer->Indices[i+2]].Normal = p.Normal;
            }

            if (buffer->Vertices.size())
            {
                // create texture for this block
                video::IImage* img = new video::CImage(texture,
                                                       core::position2d<s32>((s32)(processed.X*thRel.X), (s32)(processed.Y*thRel.Y)),
                                                       core::dimension2d<s32>((s32)(blockSize.Width*thRel.X), (s32)(blockSize.Height*thRel.Y)));

                sprintf(textureName, "terrain%d_%d", tm, mesh->getMeshBufferCount());

                material.Texture1 = driver->addTexture(textureName, img);

                if (material.Texture1)
                {
//.........这里部分代码省略.........