C++ MaterialPtr::applyTextureAliases方法代码示例

    //---------------------------------------------------------------------
    bool SubMesh::updateMaterialUsingTextureAliases(void)
    {
        bool newMaterialCreated = false;
        // if submesh has texture aliases
        // ask the material manager if the current summesh material exists
        if (hasTextureAliases() && MaterialManager::getSingleton().resourceExists(mMaterialName))
        {
            // get the current submesh material
            MaterialPtr material = MaterialManager::getSingleton().getByName( mMaterialName );
            // get test result for if change will occur when the texture aliases are applied
            if (material->applyTextureAliases(mTextureAliases, false))
            {
                Ogre::String newMaterialName;

                // If this material was already derived from another material
                // due to aliasing, let's strip off the aliasing suffix and
                // generate a new one using our current aliasing table.

                Ogre::String::size_type pos = mMaterialName.find("?TexAlias(", 0);
                if( pos != Ogre::String::npos )
                    newMaterialName = mMaterialName.substr(0, pos);
                else
                    newMaterialName = mMaterialName;

                newMaterialName += "?TexAlias(";
                // Iterate deterministically over the aliases (always in the same
                // order via std::map's sorted iteration nature).
                AliasTextureIterator aliasIter = getAliasTextureIterator();
                while( aliasIter.hasMoreElements() )
                {
                    newMaterialName += aliasIter.peekNextKey();
                    newMaterialName += "=";
                    newMaterialName += aliasIter.getNext();
                    newMaterialName += " ";
                }
                newMaterialName += ")";
                    
                // Reuse the material if it's already been created. This decreases batch
                // count and keeps material explosion under control.
                if(!MaterialManager::getSingleton().resourceExists(newMaterialName))
                {
                    Ogre::MaterialPtr newMaterial = Ogre::MaterialManager::getSingleton().create(
                        newMaterialName, material->getGroup());
                    // copy parent material details to new material
                    material->copyDetailsTo(newMaterial);
                    // apply texture aliases to new material
                    newMaterial->applyTextureAliases(mTextureAliases);
                }
                // place new material name in submesh
                setMaterialName(newMaterialName);
                newMaterialCreated = true;
            }
        }

        return newMaterialCreated;
    }

    //---------------------------------------------------------------------
    bool SubMesh::updateMaterialUsingTextureAliases(void)
    {
        bool newMaterialCreated = false;
        // if submesh has texture aliases
        // ask the material manager if the current summesh material exists
        if (hasTextureAliases() && MaterialManager::getSingleton().resourceExists(mMaterialName))
        {
            // get the current submesh material
            MaterialPtr material = MaterialManager::getSingleton().getByName( mMaterialName );
            // get test result for if change will occur when the texture aliases are applied
            if (material->applyTextureAliases(mTextureAliases, false))
            {
                // material textures will be changed so copy material,
                // new material name is old material name + index
                // check with material manager and find a unique name
                size_t index = 0;
                String newMaterialName = mMaterialName + "_" + StringConverter::toString(index);
                while (MaterialManager::getSingleton().resourceExists(newMaterialName))
                {
                    // increment index for next name
                    newMaterialName = mMaterialName + "_" + StringConverter::toString(++index);
                }

                Ogre::MaterialPtr newMaterial = Ogre::MaterialManager::getSingleton().create(
                    newMaterialName, material->getGroup());
                // copy parent material details to new material
                material->copyDetailsTo(newMaterial);
                // apply texture aliases to new material
                newMaterial->applyTextureAliases(mTextureAliases);
                // place new material name in submesh
                setMaterialName(newMaterialName);
                newMaterialCreated = true;
            }
        }

        return newMaterialCreated;
    }

Ogre::MaterialPtr EmberTerrainProfile::generate(const Ogre::Terrain* terrain)
{
    const EmberTerrain* emberTerrain = static_cast<const EmberTerrain*>(terrain);

    const auto& index = emberTerrain->getIndex();

    IPageData* pageData = mDataProvider.getPageData(index);

    if (!pageData) {
        S_LOG_WARNING("Could not find corresponding page data for OgreTerrain at " << "[" << index.first << "|" << index.second << "]");
        return getOrCreateMaterialClone(mErrorMaterialTemplate, terrain->getMaterialName());
    }

    S_LOG_INFO("Loading material for terrain page: " << "[" << index.first << "|" << index.second << "]");

    Ogre::MaterialPtr mat = pageData->getMaterial();

    if (mat.isNull()) {
        S_LOG_WARNING("Terrain material was not found.");
        return getOrCreateMaterialClone(mErrorMaterialTemplate, terrain->getMaterialName());
    }

    Ogre::AliasTextureNamePairList aliases;
    aliases[Techniques::Shader::NORMAL_TEXTURE_ALIAS] = terrain->getTerrainNormalMap()->getName();
    auto compositeMap = terrain->getCompositeMap();
    if (!compositeMap.isNull()) {
        aliases[Techniques::Shader::COMPOSITE_MAP_ALIAS] = compositeMap->getName();
    }

    bool success = mat->applyTextureAliases(aliases);
    if (!success) {
        S_LOG_WARNING("Could not apply alias for normal map and/or composite map for terrain material \"" << mat->getName() << "\"");
    }

    return mat;
}

const Ogre::MaterialPtr&
Terrain::_getGridMaterial(const TerrainData::GridInfo &gridInfo, ushort depthBias, int nTileX, int nTileZ)
{
    assert(mData != NULL);

    size_t textureIds[TerrainData::NumLayers] = { 0 };
    for (size_t i = 0; i < TerrainData::NumLayers; ++i)
    {
        if (gridInfo.layers[i].pixmapId)
        {
            textureIds[i] = _getPixmapAtlasId(gridInfo.layers[i].pixmapId - 1) + 1;
        }
    }
    assert(textureIds[0] && "Internal fault while create grid material");

    bool lightmapped = mData->mLightmapImage && getLightmapQuality() != LMQ_NONE;
   Ogre::ulong lightmapId = lightmapped ? (nTileZ << 16) | nTileX : ~0;

    MaterialId id(textureIds[0], textureIds[1], lightmapId, depthBias);

    // find the material that already created
    MaterialMap::const_iterator it = mMaterials.find(id);
    if (it != mMaterials.end())
        return it->second;

   Ogre::String name = "Terrain/";
    if (!mData->mName.empty())
        name += mData->mName + "/";
    name += Ogre::StringConverter::toString(textureIds[0]) + "." + Ogre::StringConverter::toString(textureIds[1]);
    if (depthBias)
        name += "_" + Ogre::StringConverter::toString(depthBias);

   Ogre::String lightmapName = "<Lightmap>(" +
        Ogre::StringConverter::toString(nTileX / mData->mTileSize) + "," +
        Ogre::StringConverter::toString(nTileZ / mData->mTileSize) + ")";
    if (lightmapped)
        name += "_" + lightmapName;

	Ogre::MaterialPtr material = Ogre::MaterialManager::getSingleton().getByName(name);
    if (material.isNull())
    {
        // get user supplied material
       Ogre::String templateName = textureIds[1] ? "TwoLayer" : "OneLayer";
		if (lightmapped)
            templateName += "Lightmap";

        TerrainData::MaterialTemplates::const_iterator it =
            mData->mMaterialTemplates.find(templateName);
        if (it == mData->mMaterialTemplates.end())
            OGRE_EXCEPT(Ogre::Exception::ERR_ITEM_NOT_FOUND,
                "Can't found grid material template for '" + templateName + "'!", 
                "Terrain::_getGridMaterial");

        const Ogre::String& baseName = it->second;
        Ogre::MaterialPtr templateMaterial = Ogre::MaterialManager::getSingleton().getByName(baseName);
        if (templateMaterial.isNull())
            OGRE_EXCEPT(Ogre::Exception::ERR_ITEM_NOT_FOUND, 
                "Can't load grid material template '" + baseName + "'!", 
                "Terrain::_getGridMaterial");

        // clone the material
        material = templateMaterial->clone(name, true, BRUSH_RESOURCE_GROUP_NAME);

        // Setup texture alias list
        Ogre::AliasTextureNamePairList aliasList;
        aliasList["<layer0>"] = mAtlases[textureIds[0]-1].texture->getName();
        if (textureIds[1])
            aliasList["<layer1>"] = mAtlases[textureIds[1]-1].texture->getName();
        if (lightmapped)
            aliasList["<lightmap>"] = lightmapName;

        // Applies texture names
        material->applyTextureAliases(aliasList);

        // Applies surface params
        _applySurfaceParams(material);

        // Applies fog
        _applyFogMode(material, Ogre::FOG_NONE, mCurrentFogMode);

        // Adjust other material attributes
        Ogre::Material::TechniqueIterator ti = material->getTechniqueIterator();
        while (ti.hasMoreElements())
        {
            Ogre::Technique* technique = ti.getNext();
            Ogre::Technique::PassIterator pi = technique->getPassIterator();
            while (pi.hasMoreElements())
            {
                Ogre::Pass* pass = pi.getNext();
                if (depthBias)
                {
#if OGRE_VERSION >= 0x010300
                    pass->setDepthBias(depthBias + pass->getDepthBiasConstant(), pass->getDepthBiasSlopeScale());
#else
                    pass->setDepthBias(depthBias + pass->getDepthBias());
#endif
                }
            }
        }
    }
//.........这里部分代码省略.........

bool Terrain::createTerrain()
{

	if(mMainViewport == NULL) 
		mMainViewport = Core::getSingleton().mCamera->getViewport();
	Ogre::CompositorManager::getSingleton().addCompositor(mMainViewport, "DemoCompositor");
	Ogre::CompositorManager::getSingleton().setCompositorEnabled(mMainViewport, "DemoCompositor", true);

	mMapData = MapDataManager::getSingletonPtr();
	DataLibrary* datalib = DataLibrary::getSingletonPtr();
	int terrainszie = mMapData->getMapSize() + 2 * MAPBOLDER + 1;

	Core::getSingleton().mSceneMgr->setSkyBox(true, "SkyBox",200);

	Ogre::GpuSharedParametersPtr sharedparams = Ogre::GpuProgramManager::getSingleton().getSharedParameters("TestSharedParamsName");
	float border = mMapData->getMapSize() * 12.0f;
	sharedparams->setNamedConstant("border", border);

	//创建灯光
	Core::getSingleton().mSceneMgr->setAmbientLight(Ogre::ColourValue(0.5f, 0.5f, 0.5f));
	mLight = Core::getSingleton().mSceneMgr->createLight("TerrainLight");
	mLight->setType(Ogre::Light::LT_DIRECTIONAL);
	mLight->setPosition(-500.0f,500.0f, 500.0f);
	mLight->setDirection(1.0f, -1.0f, -1.0f);
	mLight->setDiffuseColour(Ogre::ColourValue(0.5f, 0.5f,0.5f));
	mLight->setSpecularColour(Ogre::ColourValue(0.8f, 0.8f,0.8f));

	//设置深度图投影
	Ogre::TexturePtr tex = Ogre::TextureManager::getSingleton().getByName("shadowdepthmap");
	if(tex.isNull())
		tex = Ogre::TextureManager::getSingleton().createManual("shadowdepthmap",
			Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, Ogre::TEX_TYPE_2D, 2048, 2048, 0, Ogre::PF_FLOAT16_R, Ogre::TU_RENDERTARGET);
	mShadowDepthMapTarget = tex->getBuffer()->getRenderTarget();
	Ogre::Viewport* vp = mShadowDepthMapTarget->addViewport(CameraContral::getSingleton().getShadowMapCamera());
	vp->setSkiesEnabled(false);
	vp->setOverlaysEnabled(false);
	vp->setVisibilityMask(VISMASK_OPAQUE);
	vp->setMaterialScheme("WriteDepthMap");
	vp->setBackgroundColour(Ogre::ColourValue(1.0f,1.0f,1.0f));
	mShadowDepthMapTarget->addListener(this);
	//弱爆了……
	Ogre::MaterialPtr mat;
	mat = Ogre::MaterialManager::getSingleton().getByName("TerrainTile");
	Ogre::AliasTextureNamePairList texAliasList;
	std::string texname;
	datalib->getData("GameData/BattleData/MapData/Ground/G0Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse",texname));
	datalib->getData("GameData/BattleData/MapData/Ground/G1Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse1",texname));
	datalib->getData("GameData/BattleData/MapData/Ground/G2Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse2",texname));
	datalib->getData("GameData/BattleData/MapData/Ground/G3Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse3",texname));
	mat->applyTextureAliases(texAliasList);
	texAliasList.clear();

	mat = Ogre::MaterialManager::getSingleton().getByName("CliffMat1");
	datalib->getData("GameData/BattleData/MapData/Ground/G0Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse",texname));
	texAliasList.insert(std::make_pair("Diffuse1","Cliff.tga"));
	mat->applyTextureAliases(texAliasList);
	texAliasList.clear();

	mat = Ogre::MaterialManager::getSingleton().getByName("CliffMat2");
	datalib->getData("GameData/BattleData/MapData/Ground/G1Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse",texname));
	texAliasList.insert(std::make_pair("Diffuse1","Cliff.tga"));
	mat->applyTextureAliases(texAliasList);
	texAliasList.clear();

	mat = Ogre::MaterialManager::getSingleton().getByName("CliffMat3");
	datalib->getData("GameData/BattleData/MapData/Ground/G2Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse",texname));
	texAliasList.insert(std::make_pair("Diffuse1","Cliff.tga"));
	mat->applyTextureAliases(texAliasList);
	texAliasList.clear();

	mat = Ogre::MaterialManager::getSingleton().getByName("CliffMat4");
	datalib->getData("GameData/BattleData/MapData/Ground/G3Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse",texname));
	texAliasList.insert(std::make_pair("Diffuse1","Cliff.tga"));
	mat->applyTextureAliases(texAliasList);
	texAliasList.clear();

	mat = Ogre::MaterialManager::getSingleton().getByName("BankMat1");
	datalib->getData("GameData/BattleData/MapData/Ground/G0Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse",texname));
	texAliasList.insert(std::make_pair("Diffuse1","Cliff.tga"));
	mat->applyTextureAliases(texAliasList);
	texAliasList.clear();

	mat = Ogre::MaterialManager::getSingleton().getByName("BankMat2");
	datalib->getData("GameData/BattleData/MapData/Ground/G1Tex",texname);
	texAliasList.insert(std::make_pair("Diffuse",texname));
	texAliasList.insert(std::make_pair("Diffuse1","Cliff.tga"));
	mat->applyTextureAliases(texAliasList);
	texAliasList.clear();

	mat = Ogre::MaterialManager::getSingleton().getByName("BankMat3");
	datalib->getData("GameData/BattleData/MapData/Ground/G2Tex",texname);
//.........这里部分代码省略.........