电光源线光源光的颜色方向位置
createRoot()
Technique
EntiyNode
RenderSystem::_updateAllRenderTargets
q->clear
_setProjectionMatrix
Pass
initialiseRTShaderSystem
_addObjects
SceneManager::_renderScene
setup()
prepareRenderQueue
_findVisibleObjects
root::renderOneFrame
setCurrentViewport
initApp()
SceneManagerEnumerator
cameraNode
_renderVisibleObjects
createRenderWindow()
Root
renderSingleObject
addRenderQueueListener
unbindGpuProgram
初始化：
_endFrame
RenderQueue
mShaderGenerator
_updateSceneGraph
lightNode
DynLibManagerArchiveManagerResourceGroupManagerResourceBackgroundQueueSceneManagerEnumeratorShadowTextureManagerRenderSystem(GLSupport)MaterialManagerMeshManagerSkeletonManagerParticleSystemManagerTimerLodStrategyManager
getGLContext
RenderSystem
eglGetCurrentContext
loadResources
createNewContext
Material
clearFrameBuffer
拿顶点、矩阵、找光源
addViewport
createSceneManager（SceneManager）
createEntity（mesh）
渲染：
Camera::_renderScene
Viewport::update
_beginFrame
渲染状态的设置参数，比如光照参数、纹理阶段设置、Alpha 混合操作、深度缓冲、雾、裁减方式、填充模式
root::rendertarget
Texture
