C++ MeshPtr::buildTangentVectors方法代码示例

void OgreSample8App::setupModes()
{
    StringVector matNames;

    matNames.push_back("Examples/BumpMapping/MultiLight");
    matNames.push_back("Examples/BumpMapping/MultiLightSpecular");
    matNames.push_back("Examples/OffsetMapping/Specular");
    matNames.push_back("Examples/ShowUV");
    matNames.push_back("Examples/ShowNormals");
    matNames.push_back("Examples/ShowTangents");

    matNames.push_back("RTSS/NormalMapping_SinglePass");
    matNames.push_back("RTSS/NormalMapping_MultiPass");

    mPossibilities["ogrehead.mesh"] = matNames;
    mPossibilities["knot.mesh"] = matNames;

    matNames.clear();
    matNames.push_back("Examples/Athene/NormalMapped");
    matNames.push_back("Examples/Athene/NormalMappedSpecular");
    matNames.push_back("Examples/Athene/NormalMappedSpecular");
    matNames.push_back("Examples/ShowUV");
    matNames.push_back("Examples/ShowNormals");
    matNames.push_back("Examples/ShowTangents");
    matNames.push_back("RTSS/Athene/NormalMapping_SinglePass");
    matNames.push_back("RTSS/Athene/NormalMapping_MultiPass");

    mPossibilities["athene.mesh"] = matNames;

    for (std::map<Ogre::String,Ogre::StringVector>::iterator it = mPossibilities.begin(); it != mPossibilities.end(); it++)
    {
        Ogre::MeshPtr mesh = MeshManager::getSingleton().load(it->first,ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY);

        unsigned short src,dest;
        if (!mesh->suggestTangentVectorBuildParams(VES_TANGENT,src,dest))
        {
            mesh->buildTangentVectors(VES_TANGENT,src,dest);
        }
        Entity* ent = mSceneMgr->createEntity(mesh->getName(),mesh->getName());
        ent->setMaterialName(it->second.front());
    }

    mMeshMenu->addItem(new CEGUI::ListboxTextItem("athene.mesh"));
    mMeshMenu->addItem(new CEGUI::ListboxTextItem("ogrehead.mesh"));
    mMeshMenu->addItem(new CEGUI::ListboxTextItem("knot.mesh"));
    mMeshMenu->setItemSelectState(size_t(0),true);

    const char * a = mMeshMenu->getSelectedItem()->getText().c_str();
    Ogre::StringVector::iterator it = mPossibilities[a].begin();
    Ogre::StringVector::iterator itEnd = mPossibilities[mMeshMenu->getSelectedItem()->getText().c_str()].end();

    for (; it != itEnd; it++)
    {
        mMaterialMenu->addItem(new ListboxTextItem(it->c_str()));
    }
    mMaterialMenu->setItemSelectState(size_t(0),true);
    mSceneMgr->getEntity(mMeshMenu->getSelectedItem()->getText().c_str())->setMaterialName(mMaterialMenu->getSelectedItem()->getText().c_str());
}

NxEntity * NxNode::CreateNxBox( const std::string & BoxName, const Nx::Vector3 & Dimensions, const Nx::Vector3 & NumSegments  )
{
	Ogre::MeshPtr NxMesh = NxMeshManager::getSingleton().CreateBox( BoxName, Dimensions, NumSegments );

	unsigned short src, dest;
	if (!NxMesh->suggestTangentVectorBuildParams(VES_TANGENT, src, dest)){
		NxMesh->buildTangentVectors(VES_TANGENT, src, dest);		
	}

	NxEntity * c = new NxEntity( this, BoxName );
	mNxEntities.insert( NxEntityList::value_type( BoxName, c ) );
	return c;
}

//.........这里部分代码省略.........
                // Vertex normals
                // For the moment, ignore any discrepancies per vertex
				msTriangleEx_GetNormal(pTriangleEx, k, &Normal[0]);
				msTriangleEx_GetTexCoord(pTriangleEx, k, &uv[0]);
				pTex[(vertIdx*2)]=uv[0];
				pTex[(vertIdx*2)+1]=uv[1];
                pNorm[(vertIdx*3)] = Normal[0];
                pNorm[(vertIdx*3)+1] = Normal[1];
                pNorm[(vertIdx*3)+2] = Normal[2];
            }

        } // Faces
        nbuf->unlock();
        ibuf->unlock();
        tbuf->unlock();

        // Now use Ogre's ability to reorganise the vertex buffers the best way
        Ogre::VertexDeclaration* newDecl = 
            ogreSubMesh->vertexData->vertexDeclaration->getAutoOrganisedDeclaration(
                foundBoneAssignment, false);
        Ogre::BufferUsageList bufferUsages;
        for (size_t u = 0; u <= newDecl->getMaxSource(); ++u)
            bufferUsages.push_back(Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
        ogreSubMesh->vertexData->reorganiseBuffers(newDecl, bufferUsages);


        logMgr.logMessage("Geometry done.");
    } // SubMesh

    // Set bounds
    ogreMesh->_setBoundingSphereRadius(Ogre::Math::Sqrt(maxSquaredRadius));
    ogreMesh->_setBounds(Ogre::AxisAlignedBox(min, max), false);


    // Keep hold of a Skeleton pointer for deletion later
    // Mesh uses Skeleton pointer for skeleton name
    Ogre::SkeletonPtr pSkel;

    if (exportSkeleton && foundBoneAssignment)
    {
        // export skeleton, also update mesh to point to it
        pSkel = doExportSkeleton(pModel, ogreMesh);
    }
    else if (!exportSkeleton && foundBoneAssignment)
    {
        // We've found bone assignments, but skeleton is not to be exported
        // Prompt the user to find the skeleton
        if (!locateSkeleton(ogreMesh))
            return;

    }

    // Export
    logMgr.logMessage("Creating MeshSerializer..");
    Ogre::MeshSerializer serializer;
    logMgr.logMessage("MeshSerializer created.");

    // Generate LODs if required
    if (generateLods)
    {
        // Build LOD depth list
        Ogre::Mesh::LodDistanceList distList;
        float depth = 0;
        for (unsigned short depthidx = 0; depthidx < numLods; ++depthidx)
        {
            depth += lodDepthIncrement;
            distList.push_back(depth);
        }

        ogreMesh->generateLodLevels(distList, lodReductionMethod, lodReductionAmount);
    }

    if (generateEdgeLists)
    {
        ogreMesh->buildEdgeList();
    }

    if (generateTangents)
    {
		unsigned short src, dest;
		ogreMesh->suggestTangentVectorBuildParams(tangentSemantic, src, dest);
		ogreMesh->buildTangentVectors(tangentSemantic, src, dest, tangentsSplitMirrored, tangentsSplitRotated, tangentsUseParity);
    }

    // Export
    Ogre::String msg;
	msg  = "Exporting mesh data to file '" + Ogre::String(szFile) + "'";
    logMgr.logMessage(msg);
    serializer.exportMesh(ogreMesh.getPointer(), szFile);
    logMgr.logMessage("Export successful");

    Ogre::MeshManager::getSingleton().remove(ogreMesh->getHandle());
    if (!pSkel.isNull())
        Ogre::SkeletonManager::getSingleton().remove(pSkel->getHandle());

	if (exportMaterials && msModel_GetMaterialCount(pModel) > 0)
	{
		doExportMaterials(pModel);
	}
}