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I'm trying to wrap my head around how scene graphs work, and how to apply that to my game, in the context of all my game objects, including assets, cameras, units, shaders, etc.

All I can find are massively simplified examples that include planets and rotations. What I'd like is a real world example of a well written scene graph, preferably in C++ and if possible with some form of graphical representation of at least a part of the graph.

Additional information: I am writing a real time strategy game using C++ and DirectX 11. Any other pointers for advice would be massively helpful. Wrapping my head around a scene graph and how that would relate to design patterns like data locality etc, and how to encapsulate it all in a standardised system is proving very difficult for me. I am extremely, extremely confused.

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  • \$\begingroup\$ Did you inspect open source scene graphcs like Ogre3d or OpenSceneGraph? \$\endgroup\$
    – Vaillancourt ♦
    Nov 12, 2015 at 19:57
  • \$\begingroup\$ The truth is I wouldn't even know where to begin! \$\endgroup\$
    – Mark
    Nov 12, 2015 at 22:42
  • \$\begingroup\$ The most clear example is a component-entity framework that many game engines use. The hierarchy of entities is the structure of the underlying scene graph. \$\endgroup\$
    – ratchet freak
    Nov 13, 2015 at 9:45

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With a scene graph you can have child objects that move when parent moves. You can also make some states propagate to children, like hiding/showing groups of objects just by changing the state of the root of the hierarchy. Implementation could be done by game objects having a transform component that has a pointer to its parent.

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