How ogrecave/ogre works
OGRE is a modular C++ 3D rendering engine, also exposed through Python bindings. The principal workflow is an application creating a window and scene, loading resources and configuring scene content, then asking OGRE to render through a selected graphics backend to a display. Separate branches cover the README’s major capabilities: shading, compositing, animation, particles, terrain, UI, volumetrics and optional Bullet integration. The graph uses documented capabilities and sampled SceneManager/backend behavior; several subsystem links reflect the README and tree rather than inspected implementation details.
Main entry points: OgreSceneManager.cpp Scene manager · Ogre.h Engine root · OgreApplicationContextBase.cpp Application context · OgreGLEngineDll.cpp Render system plugins
Components 21
Application Layer
- Python HighPy
Components/Python/HighPy.py - Application context
Components/Bites/src/OgreApplicationContextBase.cpp - Engine root
OgreMain/include/Ogre.h - Render window
OgreMain/include/OgreRenderWindow.h
Scene and Resources
- Scene manager
OgreMain/src/OgreSceneManager.cpp - Resource system
OgreMain/include/OgreResourceGroupManager.h - Meshes and materials
OgreMain/include/OgreMeshManager.h - Character animation
OgreMain/include/OgreAnimation.h - Particle systems
OgreMain/include/OgreParticleSystem.h
Rendering Pipeline
- Render queue
OgreMain/include/OgreRenderQueue.h - Compositor
OgreMain/include/OgreCompositorManager.h - Render system plugins
RenderSystems/GL/src/OgreGLEngineDll.cpp - Graphics API
Rendering Features
- Runtime shader system
Components/RTShaderSystem/src/OgreShaderGenerator.cpp - Terrain and paging
Components/Terrain/src/OgreTerrainGroup.cpp - Overlay UI
Components/Overlay/src/OgreOverlayManager.cpp - Volumetric rendering
Components/Volume/src/OgreVolumeMeshBuilder.cpp - Mesh LOD
Components/MeshLodGenerator/src/OgreMeshLodGenerator.cpp
Integrations
- Bullet physics
Components/Bullet/src/OgreBullet.cpp
Other components
- Application developer
- Rendered display
Connections 23
- Application developer → Application context: creates app
- Application developer → Python HighPy: calls API
- Python HighPy → Application context: wraps engine
- Application context → Engine root: initializes
- Engine root → Render window: creates window
- Engine root → Scene manager: creates scene
- Scene manager → Resource system: loads resources
- Scene manager → Meshes and materials: creates entities
- Scene manager → Character animation: manages animation
- Scene manager → Particle systems: manages effects
- Scene manager → Render queue: queues visible objects
- Scene manager → Compositor: uses pipeline
- Render queue → Render system plugins: submits rendering
- Compositor → Render system plugins: composes passes
- Render system plugins → Graphics API: issues graphics commands
- Graphics API → Rendered display: renders frames
- Scene manager → Runtime shader system: generates shaders
- Scene manager → Terrain and paging: renders terrain
- Scene manager → Overlay UI: renders overlays
- Scene manager → Volumetric rendering: renders volumes
- Meshes and materials → Mesh LOD: generates LOD
- Application developer → Bullet physics: integrates physics
- Bullet physics → Scene manager: provides physics objects