C++ SMeshBuffer类代码示例

STreeMesh* CTreeGenerator::generateTree( s32 radialSegments, s32 seed, bool addLeaves, s32 cutoffLevel )
{
    STreeMesh* treeMesh = new STreeMesh();
    
    Seed = seed;
    LeafSeed = seed;
    RadialSegments = radialSegments;
    CutoffLevel = cutoffLevel;
    AddLeaves = addLeaves;
    
    SMeshBuffer* buffer = new SMeshBuffer();
    
    treeMesh->setMeshBuffer( buffer );
    
    SBranch* root = getBranchWithId( RootIdRef );
    
    if ( root != 0 )
    {
        appendBranch( core::matrix4(), root, 1.0f, 1.0f, Levels, buffer, treeMesh->Leaves );
    }
    
    buffer->drop();
    
    return treeMesh;
}

Sprite::Sprite(std::string const& name, bool const& center)
    :Object(name), center_(center), thismesh_(0)
{
    if( !sprite_plane_ptr_ ) {
        S3DVertex vertices[4];
        u16 indices[6] = {0,2,3,3,1,0};

        vertices[0].Pos = vector3df(0,-1,0);
        vertices[1].Pos = vector3df(1,-1,0);
        vertices[2].Pos = vector3df(0, 0,0);
        vertices[3].Pos = vector3df(1, 0,0);

        vertices[0].Normal = vector3df(0,0,-1);
        vertices[1].Normal = vector3df(0,0,-1);
        vertices[2].Normal = vector3df(0,0,-1);
        vertices[3].Normal = vector3df(0,0,-1);

        vertices[0].TCoords = vector2df(0,1);
        vertices[1].TCoords = vector2df(1,1);
        vertices[2].TCoords = vector2df(0,0);
        vertices[3].TCoords = vector2df(1,0);

        SMeshBuffer* buf = new SMeshBuffer();
        buf->append(vertices, 4, indices, 6);

        sprite_plane_.addMeshBuffer( buf );
        sprite_plane_.recalculateBoundingBox();

        sprite_plane_ptr_ = &sprite_plane_;
        buf->drop(); //the addMeshBuffer method will grab it, so we can drop this ptr.
    }
}

IMesh* MeshTools::createMeshFromSoftBody(btSoftBody* softBody)
{
	SMeshBuffer* buffer = new SMeshBuffer();
	video::S3DVertex vtx;
	vtx.Color.set(255,255,255,255);

    /* Each soft body contain an array of vertices (nodes/particles_mass)   */
    btSoftBody::tNodeArray&   nodes(softBody->m_nodes);

    // Convert bullet nodes to vertices
    for(int i=0;i<nodes.size();++i)
    {
        const btSoftBody::Node&	n=nodes[i];
        const btVector3 normal=n.m_n;
        const btVector3 pos=n.m_x;

        vtx.Pos.set(pos.getX(), pos.getY(), pos.getZ());
		vtx.Normal.set(normal.getX(), normal.getY(), normal.getZ());

        // TODO: calculate texture coords
        //vtx.TCoords.set(tsx, tsy);

        buffer->Vertices.push_back(vtx);
    }

    // Convert triangles of the softbody to an index list
    for(int i=0;i<softBody->m_faces.size();++i)
    {
        auto	faces = softBody->m_faces;

        btSoftBody::Node*   node_0=faces[i].m_n[0];
        btSoftBody::Node*   node_1=faces[i].m_n[1];
        btSoftBody::Node*   node_2=faces[i].m_n[2];

        const int indices[] =
        {
            int(node_0-&nodes[0]),
            int(node_1-&nodes[0]),
            int(node_2-&nodes[0])
        };

        for(int j=0;j<3;++j)
            buffer->Indices.push_back(indices[j]);
    }

	buffer->recalculateBoundingBox();

	// Default the mesh to stream because most likely we will be updating
	// the vertex positions every frame to deal with softbody movement.
	buffer->setHardwareMappingHint(EHM_STREAM);

	SMesh* mesh = new SMesh();
	mesh->addMeshBuffer(buffer);
	mesh->recalculateBoundingBox();
	buffer->drop();
	return mesh;
}

void MeshBuffer_SetVertex(IntPtr meshb, unsigned int nr, IntPtr vert)
{
	SMeshBuffer *mb = ((SMeshBuffer*)meshb);
	if(nr >= mb->getVertexCount())
	{
		mb->Vertices.push_back(*((S3DVertex*)vert));
		MeshBuffer_SetVertex(meshb, nr, vert);
	}
	else
		(((S3DVertex*)(mb->getVertices()))[nr]) = *((S3DVertex*)vert);
}

	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();
	}

void MeshBuffer_SetColor(IntPtr meshb, M_SCOLOR color)
{
	SMeshBuffer *mb = ((SMeshBuffer*)meshb);
	int cnt = mb->getVertexCount();
	//mb->grab();
	for (int i=0;i<cnt;i++)
	{

		mb->Vertices[i].Color = MU_SCOLOR(color);
		
	}
	mb->setDirty(irr::scene::EBT_VERTEX);

}

//! constructor
CBillboardTextSceneNode::CBillboardTextSceneNode(ISceneNode* parent, ISceneManager* mgr, s32 id,
	gui::IGUIFont* font,const wchar_t* text,
	const core::vector3df& position, const core::dimension2d<f32>& size,
	video::SColor colorTop,video::SColor shade_bottom )
: IBillboardTextSceneNode(parent, mgr, id, position),
	Font(0), ColorTop(colorTop), ColorBottom(shade_bottom), Mesh(0)
{
	#ifdef _DEBUG
	setDebugName("CBillboardTextSceneNode");
	#endif

	Material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
	Material.MaterialTypeParam = 1.f / 255.f;
	Material.BackfaceCulling = false;
	Material.Lighting = false;
	Material.ZBuffer = video::ECFN_LESSEQUAL;
	Material.ZWriteEnable = false;

	if (font)
	{
		// doesn't support other font types
		if (font->getType() == gui::EGFT_BITMAP)
		{
			Font = (gui::IGUIFontBitmap*)font;
			Font->grab();

			// mesh with one buffer per texture
			Mesh = new SMesh();
			for (u32 i=0; i<Font->getSpriteBank()->getTextureCount(); ++i)
			{
				SMeshBuffer *mb = new SMeshBuffer();
				mb->Material = Material;
				mb->Material.setTexture(0, Font->getSpriteBank()->getTexture(i));
				Mesh->addMeshBuffer(mb);
				mb->drop();
			}
		}
		else
		{
			os::Printer::log("Sorry, CBillboardTextSceneNode does not support this font type", ELL_INFORMATION);
		}
	}

	setText(text);
	setSize(size);

	setAutomaticCulling ( scene::EAC_BOX );
}

IMeshSceneNode* CustomSceneNodeManager::CreateConeSceneNode(scene::ISceneManager* sceneManager, s32 id, SColor& color, unsigned int resolution, float radius, float height)
{
	if (resolution >= 4)
	{
		/*IMesh* newConeMesh = sceneManager->getGeometryCreator()->createConeMesh(radius, height, resolution, color, color);

		IMeshSceneNode* node = sceneManager->addMeshSceneNode(newConeMesh);

		sceneManager->getMeshCache()->addMesh(irr::io::path("ConeMesh"), (irr::scene::IAnimatedMesh*)newConeMesh);
		newConeMesh->drop();*/

		SMesh* newConeMesh = new SMesh();

		SMeshBuffer* buf = new SMeshBuffer();
	
		newConeMesh->addMeshBuffer(buf);
		buf->MappingHint_Vertex = EHM_STATIC;
		buf->MappingHint_Index = EHM_STATIC;
		buf->drop();

		int noWarningSignedResolution = resolution;

		float currentTheta = 0.0f;
		float skipAmount = 2.0f*PI / (float)resolution;
		float halfHeight = height / 2.0f;

		S3DVertex temp1 = S3DVertex(Vector3(0.0f, halfHeight, 0.0f), Vector3_Zero, color, vector2d<f32>(0.0f, 0.0f));
		S3DVertex temp2 = S3DVertex(Vector3(0.0f, -halfHeight, 0.0f), Vector3_Zero, color, vector2d<f32>(0.0f, 1.0f));
		for(int i = 0; i < noWarningSignedResolution; i++)
		{
			float x = cosf(currentTheta) * radius;
			float z = sinf(currentTheta) * radius;

			temp2.Pos.X = x;
			temp2.Pos.Z = z;
			temp2.TCoords.X = currentTheta / 2.0f*PI;

			buf->Vertices.push_back(temp2);

			currentTheta += skipAmount;
		}
		
		buf->Vertices.push_back(temp1);

		//Get side indices
		for(int i = 0; i < noWarningSignedResolution - 1; i++)
		{
			buf->Indices.push_back(i);
			buf->Indices.push_back(buf->Vertices.size()-1);
			buf->Indices.push_back(i+1);
		}

		buf->Indices.push_back(buf->Vertices.size()-2);
		buf->Indices.push_back(buf->Vertices.size()-1);
		buf->Indices.push_back(0);

		temp2.Pos.X = 0.0f;
		temp2.Pos.Z = 0.0f;
		buf->Vertices.push_back(temp2);

		//Get bottom indices
		for(int i = 0; i < noWarningSignedResolution - 1; i++)
		{
			buf->Indices.push_back(i);
			buf->Indices.push_back(i+1);
			buf->Indices.push_back(buf->Vertices.size()-1);
		}

		buf->Indices.push_back(buf->Vertices.size()-1);
		buf->Indices.push_back(buf->Vertices.size()-3);
		buf->Indices.push_back(0);

		//Calculate normals
		CalculateNormals(buf->Vertices, buf->Indices);

		buf->recalculateBoundingBox();
		newConeMesh->recalculateBoundingBox();

		IMeshSceneNode* node = sceneManager->addMeshSceneNode(newConeMesh);

		newConeMesh->drop();

		return node;
	}

	return NULL;
}

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.........

PlayerFrame::PlayerFrame(FrameInfo info, bool load_volumic)
{
	// increase total number of loaded frames
	PlayerFrame::totalLoadedFrames++;
	device->getLogger()->log((stringw("Loading frame number ")+stringw(info.id)+L". Total of frames loaded : "+stringw(PlayerFrame::totalLoadedFrames)).c_str());

	core::array<stringc> _lastEleFileNames;
	core::array<stringc> _lastFaceFileNames;
	core::array<scene::SMeshBuffer*> _lastBuffers;

	// initialize some variables
	this->id = info.id;

	for (u32 o=0; o < info.nodefiles.size(); o++)
	{
		SMeshBuffer* buffer = new SMeshBuffer();
		IMeshSceneNode* node = NULL;
		stringc nodeFileName = info.nodefiles[o];
		stringc faceFileName = info.facefiles[o];
		stringc eleFileName = info.elefiles[o];

		// LOADING
		ifstream innode;
		ifstream inele;
		ifstream inface;

		int nb_of_points, nb_of_tetrahedra, nb_of_faces;
		int p1, p2, p3, p4;
		yohan::base::DATA x, y, z;

		// used to know if an error occured in the while loop
		bool error = false;


		// -----------------------------------------------------------------------
		// - POINTS --------------------------------------------------------------
		// -----------------------------------------------------------------------
		innode.open(nodeFileName.c_str(), ios::in | ios::binary); // opens the nodes file
		if (!innode || !innode.good())
		{
			device->getLogger()->log(( stringc("ERROR: This node file could not be opened : ") + nodeFileName ).c_str());
			buffer->drop();
			continue;
		}

		// first line data : innode >> nb_of_points >> dim >> nb_of_attr >> boundary_marker;
		innode.read(reinterpret_cast < char * > (&nb_of_points), sizeof(int));

		// we should have at least one tetrahedra (4 points) and each point should have 3 coordinates
		if (nb_of_points > 65535 || nb_of_points < 4)
		{
			device->getLogger()->log("ERROR: a node file should not contain more than 65535 points and less than 4 points.");
			buffer->drop();
			continue;
		}
		device->getLogger()->log((stringw("Loading ")+stringw(nb_of_points)+L" points from "+stringw(nodeFileName.c_str())+L"...").c_str());

		// default color
		video::SColor clr(255,100,100,200);

		// lets add the vertices to the buffer
		buffer->Vertices.reallocate( nb_of_points );

		// this is one line : innode >> index >> x >> y >> z;
		innode.read(reinterpret_cast < char * > (&x), sizeof(yohan::base::DATA));
		innode.read(reinterpret_cast < char * > (&y), sizeof(yohan::base::DATA));
		innode.read(reinterpret_cast < char * > (&z), sizeof(yohan::base::DATA));
		while (!innode.eof() && innode.good())// && (int)buffer->Vertices.size() < nb_of_points)
		{
			buffer->Vertices.push_back(video::S3DVertex((f32)x, (f32)y, (f32)z, 1,0,0, clr, 0,0));
			// this is one line : innode >> index >> x >> y >> z;
			innode.read(reinterpret_cast < char * > (&x), sizeof(yohan::base::DATA));
			innode.read(reinterpret_cast < char * > (&y), sizeof(yohan::base::DATA));
			innode.read(reinterpret_cast < char * > (&z), sizeof(yohan::base::DATA));
		}

		innode.close();
		innode.clear();
		// -----------------------------------------------------------------------

		// lets check if verticies have been added well
		if (buffer->Vertices.size() != nb_of_points)
		{
			device->getLogger()->log("ERROR: the node file does not seem to be valid.");
			buffer->drop();
			continue;
		}





		if (load_volumic)
		{
			// -----------------------------------------------------------------------
			// - TETRAHEDRAS ---------------------------------------------------------
			// -----------------------------------------------------------------------
			// at first we check if the ele file has not been already opened
			s32 eleLoadedIndex = -1;
			for (u32 e=0; e < PlayerFrame::lastEleFileNames.size(); e++)
//.........这里部分代码省略.........

void drawFrame()
{
    u32 i,color = 0;
    Matrix4 rotX,rotY;
    Vector4 objEyePos,objLightPos;
    Matrix4 viewMatrix,modelMatrix,modelMatrixIT,modelViewMatrix;
    Point3 lightPos = Point3(250.0f,150.0f,150.0f);
    f32 globalAmbientColor[3] = {0.1f,0.1f,0.1f};
    f32 lightColor[3] = {0.95f,0.95f,0.95f};
    f32 materialColorDiffuse[3] = {0.5f,0.0f,0.0f};
    f32 materialColorSpecular[3] = {0.7f,0.6f,0.6f};
    f32 shininess = 17.8954f;
    static f32 rot = 0.0f;
    SMeshBuffer *mesh = NULL;

    setTexture();
    setDrawEnv();

    rsxSetClearColor(context,color);
    rsxSetClearDepthValue(context,0xffff);
    rsxClearSurface(context,GCM_CLEAR_R |
                    GCM_CLEAR_G |
                    GCM_CLEAR_B |
                    GCM_CLEAR_A |
                    GCM_CLEAR_S |
                    GCM_CLEAR_Z);

    rsxZControl(context,0,1,1);

    for(i=0; i<8; i++)
        rsxSetViewportClip(context,i,display_width,display_height);

    viewMatrix = Matrix4::lookAt(eye_pos,eye_dir,up_vec);

    mesh = sphere;
    rotX = Matrix4::rotationX(DEGTORAD(30.0f));
    rotY = Matrix4::rotationY(DEGTORAD(rot));
    modelMatrix = rotX*rotY;
    modelMatrixIT = inverse(modelMatrix);
    modelViewMatrix = transpose(viewMatrix*modelMatrix);

    objEyePos = modelMatrixIT*eye_pos;
    objLightPos = modelMatrixIT*lightPos;

    wait_signal_spu();

    rsxBindVertexArrayAttrib(context,vertexPosition_id,mesh->pos_off,sizeof(S3DVertex),3,GCM_VERTEX_DATA_TYPE_F32,GCM_LOCATION_RSX);
    rsxBindVertexArrayAttrib(context,vertexNormal_id,mesh->nrm_off,sizeof(S3DVertex),3,GCM_VERTEX_DATA_TYPE_F32,GCM_LOCATION_RSX);
    rsxBindVertexArrayAttrib(context,vertexTexcoord_id,mesh->uv_off,sizeof(S3DVertex),2,GCM_VERTEX_DATA_TYPE_F32,GCM_LOCATION_RSX);

    rsxLoadVertexProgram(context,vpo,vp_ucode);
    rsxSetVertexProgramParameter(context,vpo,projMatrix_id,(float*)&P);
    rsxSetVertexProgramParameter(context,vpo,modelViewMatrix_id,(float*)&modelViewMatrix);

    rsxSetFragmentProgramParameter(context,fpo,eyePosition_id,(float*)&objEyePos,fp_offset);
    rsxSetFragmentProgramParameter(context,fpo,globalAmbient_id,globalAmbientColor,fp_offset);
    rsxSetFragmentProgramParameter(context,fpo,lightPosition_id,(float*)&objLightPos,fp_offset);
    //rsxSetFragmentProgramParameter(context,fpo,lightColor_id,lightColor,fp_offset);
    rsxSetFragmentProgramParameter(context,fpo,shininess_id,&shininess,fp_offset);

    rsxSetFragmentProgramParameter(context,fpo,Kd_id,materialColorDiffuse,fp_offset);
    rsxSetFragmentProgramParameter(context,fpo,Ks_id,materialColorSpecular,fp_offset);

    rsxLoadFragmentProgramLocation(context,fpo,fp_offset,GCM_LOCATION_RSX);

    rsxSetUserClipPlaneControl(context,GCM_USER_CLIP_PLANE_DISABLE,
                               GCM_USER_CLIP_PLANE_DISABLE,
                               GCM_USER_CLIP_PLANE_DISABLE,
                               GCM_USER_CLIP_PLANE_DISABLE,
                               GCM_USER_CLIP_PLANE_DISABLE,
                               GCM_USER_CLIP_PLANE_DISABLE);

    rsxDrawIndexArray(context,GCM_TYPE_TRIANGLES,mesh->ind_off,mesh->getIndexCount(),GCM_INDEX_TYPE_32B,GCM_LOCATION_RSX);

    mesh = donut;
    rotX = Matrix4::rotationX(DEGTORAD(rot));
    rotY = Matrix4::rotationY(DEGTORAD(30.0f));
    modelMatrix = rotX*rotY;
    modelMatrix.setTranslation(Vector3(3.0f,5.0f,-8.0f));

    modelMatrixIT = inverse(modelMatrix);
    modelViewMatrix = transpose(viewMatrix*modelMatrix);

    objEyePos = modelMatrixIT*eye_pos;
    objLightPos = modelMatrixIT*lightPos;

    rsxBindVertexArrayAttrib(context,vertexPosition_id,mesh->pos_off,sizeof(S3DVertex),3,GCM_VERTEX_DATA_TYPE_F32,GCM_LOCATION_RSX);
    rsxBindVertexArrayAttrib(context,vertexNormal_id,mesh->nrm_off,sizeof(S3DVertex),3,GCM_VERTEX_DATA_TYPE_F32,GCM_LOCATION_RSX);
    rsxBindVertexArrayAttrib(context,vertexTexcoord_id,mesh->uv_off,sizeof(S3DVertex),2,GCM_VERTEX_DATA_TYPE_F32,GCM_LOCATION_RSX);

    rsxLoadVertexProgram(context,vpo,vp_ucode);
    rsxSetVertexProgramParameter(context,vpo,projMatrix_id,(float*)&P);
    rsxSetVertexProgramParameter(context,vpo,modelViewMatrix_id,(float*)&modelViewMatrix);

    rsxSetFragmentProgramParameter(context,fpo,eyePosition_id,(float*)&objEyePos,fp_offset);
    rsxSetFragmentProgramParameter(context,fpo,globalAmbient_id,globalAmbientColor,fp_offset);
    rsxSetFragmentProgramParameter(context,fpo,lightPosition_id,(float*)&objLightPos,fp_offset);
    rsxSetFragmentProgramParameter(context,fpo,lightColor_id,lightColor,fp_offset);
    rsxSetFragmentProgramParameter(context,fpo,shininess_id,&shininess,fp_offset);

//.........这里部分代码省略.........

//! creates/loads an animated mesh from the file.
//! \return Pointer to the created mesh. Returns 0 if loading failed.
//! If you no longer need the mesh, you should call IAnimatedMesh::drop().
//! See IReferenceCounted::drop() for more information.
IAnimatedMesh* CSTLMeshFileLoader::createMesh(io::IReadFile* file)
{
	const long filesize = file->getSize();
	if (filesize < 6) // we need a header
		return 0;

	const u32 WORD_BUFFER_LENGTH = 512;

	SMesh* mesh = new SMesh();
	SMeshBuffer* meshBuffer = new SMeshBuffer();
	mesh->addMeshBuffer(meshBuffer);
	meshBuffer->drop();

	core::vector3df vertex[3];
	core::vector3df normal;

	c8 buffer[WORD_BUFFER_LENGTH];

	bool binary = false;
	file->read(buffer, 5);
	if (strncmp("solid", buffer, 5))
		binary = true;
	// read/skip header
	u32 binFaceCount = 0;
	if (binary)
	{
		file->seek(80);
		file->read(&binFaceCount, 4);
#ifdef __BIG_ENDIAN__
		binFaceCount = os::Byteswap::byteswap(binFaceCount);
#endif
	}
	else
		goNextLine(file);

	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
//.........这里部分代码省略.........

//.........这里部分代码省略.........
        }
    };

    Visitor visitor;
    tree.triangulate(triangles, section, min_height, max_height, &visitor);
    //tree.sweep(triangles, section, &visitor);

   //cout << "num triangle points: " << triangles.size() << endl;

    vector<QuadTreePtr> leaves;
    tree.dumpLeaves(leaves);

    //cout << "num leaves: " << leaves.size() << endl;

/*
    for (QuadTreePtr p1 : leaves)
        for (QuadTreePtr p2 : leaves)
            if (p1 != p2)
                if (p1->isAdjacent(p2))
                    if (!visitor.has(p1, p2))
                    {
                        auto sz1 = p1->region.getSize();
                        auto sz2 = p2->region.getSize();
                        auto c1 = p1->region.getCenter();
                        auto c2 = p2->region.getCenter();
                        char const* path1 = p1->getPath().c_str();
                        char const* path2 = p2->getPath().c_str();
                        cout << path1 << endl;
                        cout << path2 << endl;
                        cout << "Missing pair of adjacent vertices." << endl;
                    }

    float x1 = section.UpperLeftCorner.X;
    float x2 = section.LowerRightCorner.X;
    float y1 = section.UpperLeftCorner.Y;
    float y2 = section.LowerRightCorner.Y;
*/
    /*
        d---c
        | / |
        a---b
    */

    /*
    S3DVertex sa;
    sa.Pos = vector3df(x1, y1, 0);
    PsblVertPtr a = new PossibleVertex(sa);

    S3DVertex sb;
    sb.Pos = vector3df(x2, y1, 0);
    PsblVertPtr b = new PossibleVertex(sb);

    S3DVertex sc;
    sc.Pos = vector3df(x2, y2, 0);
    PsblVertPtr c = new PossibleVertex(sc);

    S3DVertex sd;
    sd.Pos = vector3df(x1, y2, 0);
    PsblVertPtr d = new PossibleVertex(sd);

    // a-b-c
    // a-c-d
    triangles.push_back(a);
    triangles.push_back(b);
    triangles.push_back(c);

    triangles.push_back(a);
    triangles.push_back(c);
    triangles.push_back(d);

    triangles.push_back(c);
    triangles.push_back(b);
    triangles.push_back(a);

    triangles.push_back(d);
    triangles.push_back(c);
    triangles.push_back(a);
    */

	SMeshBuffer* buffer = new SMeshBuffer();

    for (auto pv : triangles)
        pv->addToMeshBuf(buffer, vector3df());

    if (buffer->getIndexCount() % 3 > 0)
        throw std::logic_error("SurfaceQuadTree triangulation added a 'triangle' with less than 3 vertices in it.");

    //cout << "num vertices " << buffer->getVertexCount() << endl;
    //cout << "num indices " << buffer->getIndexCount() << endl;

	buffer->recalculateBoundingBox();
	buffer->setHardwareMappingHint(EHM_STATIC);

	SMesh* mesh = new SMesh();
	mesh->addMeshBuffer(buffer);
	mesh->recalculateBoundingBox();
	buffer->drop();

	return mesh;
}

IMesh* MeshTools::createMeshFromHeightmap(IImage* image, dimension2du tileSizeInPixels, vector2di tilePosInTiles, bool extraStripsOnEdges)
{
    // Use top corner of image to get bias for centering the Z axis.
    float imageZeroBias = image->getPixel(0,0).getAverage();

    dimension2du imageDimension = image->getDimension();

    // Easier to think of script working in whole tile units, so handle conversion to pixel pos in this method:
    vector2di startAtPixel = tilePosInTiles * vector2di(tileSizeInPixels.Width, tileSizeInPixels.Height);

    // However we're going to invert the image Y axis so that the bottom of the picture will be at 0,0 in world space,
    // and the top of the picture will be at +Y in world space.
    startAtPixel.Y = (imageDimension.Height-1) - startAtPixel.Y;

    // Return nothing if the tile is outside the image, or if the resulting mesh would have only 0 or 1 rows or columns.
    // Doing this check early prevents getting underflow when we clip the tile size to the image dimensions a few statements down.
    if (startAtPixel.X < 0 || startAtPixel.X >= (imageDimension.Width-1) || startAtPixel.Y <= 0 || startAtPixel.Y > (imageDimension.Height-1))
        return NULL;

    // Calculate whether to use tile size or tile size + 1 (for generating overlap)
    // Adding the extra strip amount before clipping to image dimensions prevents overflowing the image edges after clipping.
    dimension2du useTileSize = tileSizeInPixels + (extraStripsOnEdges? dimension2du(1,1) : dimension2du(0,0));

    // Clip the tile size if we're dealing with a "leftover" amount at the edge that's not a whole tile's width or height.
    // Most heightmap implementations require exactly a power of 2 + 1 square dimensions like 257x257, but supporting
    // image sizes that are not whole multiples of tile size is as simple as this one line of code and supporting
    // image sizes that are not square is a nice feature for a platformer game so you can have levels that are longer
    // than they are tall.
    useTileSize.set(min(useTileSize.Width, imageDimension.Width-startAtPixel.X), min(useTileSize.Height, (u32)startAtPixel.Y+1));

	SMeshBuffer* buffer = new SMeshBuffer();

	// Preallocate vertex buffer to the size we know we'll need.
	buffer->Vertices.set_used(useTileSize.Width*useTileSize.Height);

	// Amount of TCoord per unit of x,y in image.
    vector2df tCoordsScale(1.0f / useTileSize.Width, 1.0f / useTileSize.Height);

    // Whether we put y on the outside or x on the outside, doesn't matter, because we are
    // using getIndex() to find where x and y map too.  However, I happen to know I made getIndex
    // put x's together, y in rows, and looping in the same rank order might have better cache performance
    // because it should access the vertices in the same order they are in the array.
    for (u32 y=0; y < useTileSize.Height; ++y)
    {
        for (u32 x=0; x < useTileSize.Width; ++x)
        {
            u32 index = getIndex(useTileSize, x, y);
            S3DVertex& vert = buffer->Vertices[index];

            // No special coloration
            vert.Color = SColor(255,255,255,255);

            // Scale texture to tile.
            vert.TCoords = vector2df(x,y) * tCoordsScale;

            // y axis starts with 0 at image bottom and goes up.
            vector2di pixelPos(
                startAtPixel.X+x,
                startAtPixel.Y-y
            );

            SColor heightColor = image->getPixel(pixelPos.X, pixelPos.Y);
            float thisHeight = imageZeroBias - heightColor.getAverage();

            vert.Pos.set(x, y, thisHeight);

            // I'm only averaging normals along the 4 compass directions.  It's
            // arguable whether diagonals should count; I chose to ignore diagonals.
            // Ignoring diagonals allows me to assume the "run" in rise/run is always
            // just one unit; if you add diagonals here you'll also need to change
            // the slope calculation to use the actual distance instead of assuming 1.
            vector2di offsetsArray[] = {
                vector2di( 1, 0),  //  3 o'clock
                vector2di( 0, 1),  // 12 o'clock
                vector2di(-1, 0),  //  9 o'clock
                vector2di( 0,-1)   //  6 o'clock
            };

            // Calculate the normals of the surrounding slopes.
            // Uses the image, not just the tile patch size, so it will
            // calculate correct normals for vertices on tile edges.
            for (size_t i=-0; i < 4; ++i)
            {
                vector2di offset = vector2di(x,y) + offsetsArray[i];

                // Skip this offset if it's outside the image
                if (offset.X < 0 || offset.Y < 0 || offset.X >= (s32)imageDimension.Width || offset.Y >= (s32)imageDimension.Height)
                    continue;

                vector2di otherPixelPos(
                    startAtPixel.X+x+offset.X,
                    startAtPixel.Y-y-offset.Y
                );
                float otherHeight = 255 - image->getPixel((u32)otherPixelPos.X, (u32)otherPixelPos.Y).getAverage();

                // The code Irrlicht's in terrain scene node does all kinds of complicated
                // business with cross products and such - waaay over complicated.  You don't need
                // all that stuff.  Dude it' s a heightmap: all you need to worray about is
                // rise over run on unit intervals!  Algebra 1 type stuff, y = mx + c

//.........这里部分代码省略.........

// creates a hill plane
IAnimatedMesh* CGeometryCreator::createHillPlaneMesh(const core::dimension2d<f32>& tileSize, const core::dimension2d<s32>& tc,
        video::SMaterial* material,     f32 hillHeight, const core::dimension2d<f32>& ch,
        const core::dimension2d<f32>& textureRepeatCount)
{
    core::dimension2d<s32> tileCount = tc;
    tileCount.Height += 1;
    tileCount.Width += 1;

    core::dimension2d<f32> countHills = ch;

    SMeshBuffer* buffer = new SMeshBuffer();
    SMesh* mesh = new SMesh();
    video::S3DVertex vtx;
    vtx.Color.set(255,255,255,255);
    vtx.Normal.set(0,0,0);

    if (countHills.Width < 0.01f) countHills.Width = 1;
    if (countHills.Height < 0.01f) countHills.Height = 1;

    f32 halfX = (tileSize.Width * tileCount.Width) / 2;
    f32 halfY = (tileSize.Height * tileCount.Height) / 2;

    // create vertices

    s32 x = 0;
    s32 y = 0;

    core::dimension2d<f32> tx;
    tx.Width = 1.0f / (tileCount.Width / textureRepeatCount.Width);
    tx.Height = 1.0f / (tileCount.Height / textureRepeatCount.Height);


    for (x=0; x<tileCount.Width; ++x)
        for (y=0; y<tileCount.Height; ++y)
        {
            vtx.Pos.set(tileSize.Width * x - halfX, 0, tileSize.Height * y - halfY);
            vtx.TCoords.set(-(f32)x * tx.Width, (f32)y * tx.Height);

            if (hillHeight)
                vtx.Pos.Y = (f32)(sin(vtx.Pos.X * countHills.Width * engine::core::PI / halfX) *
                                  cos(vtx.Pos.Z * countHills.Height * engine::core::PI / halfY))
                            *hillHeight;

            buffer->Vertices.push_back(vtx);
        }

    // create indices

    for (x=0; x<tileCount.Width-1; ++x)
        for (y=0; y<tileCount.Height-1; ++y)
        {
            s32 current = y*tileCount.Width + x;

            buffer->Indices.push_back(current);
            buffer->Indices.push_back(current + 1);
            buffer->Indices.push_back(current + tileCount.Width);

            buffer->Indices.push_back(current + 1);
            buffer->Indices.push_back(current + 1 + tileCount.Width);
            buffer->Indices.push_back(current + tileCount.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 (material)
        buffer->Material = *material;

    buffer->recalculateBoundingBox();

    SAnimatedMesh* animatedMesh = new SAnimatedMesh();
    mesh->addMeshBuffer(buffer);
    mesh->recalculateBoundingBox();
    animatedMesh->addMesh(mesh);
    animatedMesh->recalculateBoundingBox();

    mesh->drop();
    buffer->drop();

    return animatedMesh;
}