FreeCAD is a general purpose feature-based, parametric 3D modeler for CAD, MCAD, CAx, CAE and PLM, aimed directly at mechanical engineering and product design but also fits a wider range of uses in engineering, such as architecture or other engineering specialties. FreeCAD is based on OpenCASCADE, a powerful geometry kernel, features an Open Inventor-compliant 3D scene representation model provided by the Coin 3D library, and a broad Python API.

FreeCAD - An Open Source parametric 3D CAD modeler

The OpenSceneGraph is an open source high performance 3D graphics toolkit, used by application developers in fields such as visual simulation, games, virtual reality, scientific visualization and modelling. It is based around the concept of a SceneGraph, providing an object-oriented framework on top of OpenGL. This frees the developer from implementing and optimizing low-level graphics calls and provides many additional utilities for rapid development of graphics applications.<BR><BR>It supports view-frustum culling, occlusion culling, small feature culling, Level Of Detail (LOD) nodes, OpenGL state sorting, vertex arrays, vertex buffer objects, OpenGL Shader Language and display lists as part of the core scene graph. These together make the OpenSceneGraph one of the highest performance graphics toolkit available. The OpenSceneGraph also supports easy customization of the drawing process, such as implementation of Continuous Level of Detail (CLOD) meshes on top of the scene graph (see Virtual Terrain Project and Delta3D).

The OpenSceneGraph is an open source high performance 3D graphics toolkit, used by application developers in fields such as visual simulation, games, virtual reality, scientific visualization and modelling. It is based around the concept of a SceneGraph, providing an object-oriented framework on top of OpenGL. This frees the developer from implementing and optimizing low-level graphics calls and provides many additional utilities for rapid development of graphics applications.

OpenSceneGraph - 3D graphics toolkit

LimonEngine is a 3D first person shooter engine, developed as a hobby, to acquire a deeper knowledge of 3D game engine programming. It can load a wide variety of models and skeletal animations thanks to Assimp, has realtime directional and point lights/shadows and physics.
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 you can check out the latest tech demo at <a href="https://youtu.be/XgFlNAy5i0w">https://youtu.be/XgFlNAy5i0w</a>

LimonEngine is a 3D first person shooter engine, developed as a hobby, to acquire a deeper knowledge of 3D game engine programming. It can load a wide variety of models and skeletal animations thanks to Assimp, has realtime directional and point lights/shadows and physics.


LimonEngine - 3D FPS game engine with full dynamic lighting and shadows

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FreeCAD - An Open Source parametric 3D CAD modeler

OpenSceneGraph - 3D graphics toolkit

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FreeCAD - An Open Source parametric 3D CAD modeler

OpenSceneGraph - 3D graphics toolkit

LimonEngine - 3D FPS game engine with full dynamic lighting and shadows

TechStack

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