Step also looked, then start analyzing the specific function. This operation can be seen using SceneManager's spatial management algorithm to make visibility judgments on all SceneNode and, if possible, add to RenderQueue Roughly speaking, this class is mainly to group Objects by material, it will also manage the rendering priority of objects Ĥ． OctreeSceneManager::_findVisibleObjects
SceneManager:: _updateSceneGraph recursive calls from root node to all scene node update, mainly calculated transform ģ． SceneManager: :p repareRenderQueue here is an Ogre scenario management concept RenderQueue. The call step of the scene manager is basically as follows: - Refer to Yanliang Daniel blog.Ģ. It's a little complicated, see it a few more times))Įxplain from the step of program execution:įirst, what is the scene manager? A: cull, that is, to remove the invisible East East. (Added: Since OctreeNode inherited with SceneNode, the brothers who have seen my previous introduction know that SceneNode is also made up of tree structures.) But this tree is not the tree in our Octree, so ignore it in the next explanation, but be aware that OctreeNode's LosBound Box is a combination of all the SceneNode's Atticated Box (imagine one or more 3D models) hooked up below the SceneNode. OctreeSceneMgr contains an Octtree root, an Octtree object contains a subtree in eight directions (see member above), and an Octtree manages n OcttreeNode with a list. The relationship between the three is as follows: Note: The number of members in the actual code, the number of methods is more than 10 times what I provide below: I'll just talk about the members and methods used in the key process. Introduction to the Octagon tree in the attachment, if you do not understand the first read the attachment, I will not nonsense. Octree management, useful, very suitable for space gamesĪll of the above managers inherit the interfaces they provide with the SceneManager classĪnd the SceneNode hooked with SceneManager is managed according to its own characteristics.Įnter the title: OctreeSceneManager - Name is long, typing is troublesome
Terrain management to optimize large terrain scenariosģ. BSP management is used to support the Quade familyĢ. Ogre provides a variety of scene managers as plug-insġ. Let's start by reviewing the architecture of Ogre scenario management
IS OGRE ENGINE STILL UPDATED CODE
In view of the fact that our game version of the tutorial has not been updated for a long time, today I sent a note on the Ogre Scene Manager's Octree source code analysis. Referring to countless Octree code, found that it is still our lovely Ogre wrote the best, so look at n thousand lines of code, extract the essence for everyone to share.
Since my engine, Project Gaia, serves the 2008 Innovation Cup game project, 3D Space Games, it's time to join Octtree (Octagon Tree - which has been posted by Zhou Ning) Scenario Manager.
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