Method createTextureAtlasObject

Samples/ShaderSystem/src/ShaderSystem.cpp:1166–1271

}

ManualObject* Sample_ShaderSystem::createTextureAtlasObject()
{
    TextureAtlasSamplerFactory * textureAtlasSamplerFactory = 
        static_cast<TextureAtlasSamplerFactory *>(mShaderGenerator->getSubRenderStateFactory(TextureAtlasSampler::Type));
    TextureAtlasTablePtr textureAtlasTable(new TextureAtlasTable);

    DataStreamPtr taiFile = Ogre::ResourceGroupManager::getSingleton().openResource("TextureAtlasSampleWrap.tai");

    textureAtlasSamplerFactory->addTexutreAtlasDefinition(taiFile, textureAtlasTable);

    //Generate the geometry that will seed the particle system
    ManualObject* textureAtlasObject = mSceneMgr->createManualObject("TextureAtlasObject");

    int sliceSize = 30.0;
    int wrapSize = 5.0;

    String curMatName;

    // create original texture geometry
    for( size_t i = 0 ; i < textureAtlasTable->size() ; i++ )
    {
        bool changeMat = (curMatName != (*textureAtlasTable)[i].atlasTextureName);

        if (changeMat)
        {
            if (curMatName.empty() == false) // we don't want to end before we begin
            {
                textureAtlasObject->end();
            }

            curMatName = (*textureAtlasTable)[i].originalTextureName;
            createMaterialForTexture(curMatName, false);
            textureAtlasObject->begin(curMatName, RenderOperation::OT_TRIANGLE_LIST);
        }

        // triangle 0
        textureAtlasObject->position(i * sliceSize, 0, 0); //Position
        textureAtlasObject->textureCoord(0,0); //UV

        textureAtlasObject->position(i * sliceSize, 0, sliceSize); //Position
        textureAtlasObject->textureCoord(0,wrapSize); //UV

        textureAtlasObject->position((i + 1) * sliceSize, 0 , sliceSize); //Position
        textureAtlasObject->textureCoord(wrapSize,wrapSize); //UV

        // triangle 1
        textureAtlasObject->position(i * sliceSize, 0, 0); //Position
        textureAtlasObject->textureCoord(0,0); //UV

        textureAtlasObject->position((i + 1) * sliceSize, 0, sliceSize); //Position
        textureAtlasObject->textureCoord(wrapSize,wrapSize); //UV

        textureAtlasObject->position((i + 1) * sliceSize, 0, 0); //Position
        textureAtlasObject->textureCoord(wrapSize, 0); //UV

    }

    // create texture atlas geometry