Urchin Engine

Videos

• Game created with the engine (2023): https://www.youtube.com/watch?v=JbVsi7y7nu0
• Technical demo of physics and shadows (2015): https://www.youtube.com/watch?v=lSbCx7u6RtE

Description

Game engine library in C++20: 3D, Physics, Sound, Network, IA, Map Editor

• 3D Engine:

  • Graphic API: Vulkan
  • 3D models with skeleton animation & Blender exporter
  • Materials:
    • Albedo texture or color
    • Normal texture
    • PBR with metal/roughness workflow
    • Transparency
    • Ambient
    • Emissive
    • Depth test/write
  • Dynamic shadow: cascade shadow maps + improved PCF filter + stabilized shadow
  • Dynamic lighting with deferred shading: directional, omnidirectional, spot
  • Terrain multi-layered and grass
  • Ambient occlusion (SSAO+)
  • Anti-aliasing (FXAA)
  • Space partitioning: octree
  • UI: text, button, window, textbox, textarea, bitmap, sequence, checkbox, slider, scrollbar
  • Skybox
  • Fog

• Physics Engine:

  • Supported shapes: sphere, box, cylinder, capsule, cone, convex hull, compound shape, terrain
  • Body types: rigid body, ghost body
  • Algorithms:
    • Broad phase: AABBox Tree
    • Narrow phase: sphere-sphere, sphere-box, GJK/EPA, concave-convex
    • Constraint solver (iterative): external force, friction, restitution, inertia
  • Continuous collision detection (CCD)
  • Island
  • Ray cast
  • Character controller

• Sound Engine:

  • Supported formats: ogg
  • Localizable sound and global sound
  • Sound trigger based on character position

• IA Engine:

  • Automatic navigation mesh generator
  • Pathfinding A* with funnel algorithm
  • Character controller

• Network Engine:

  • HTTP request sender

• Map Editor:

  • Handle:
    • 3d objects with physics
    • Lights
    • Landscape: terrain, water, sky
    • Sound
    • AI agent
  • Debug visualization: hit box, light range, sound trigger, navigation mesh

Build

• Environment setup: here
• Build:
  • Debug:

    git clone https://github.com/petitg1987/urchinEngine.git && cd ./urchinEngine
    cmake -DCMAKE_BUILD_TYPE=Debug -S ./ -B .build/debug/
    cmake --build .build/debug/ -- -j 8
    

  • Release:

    git clone https://github.com/petitg1987/urchinEngine.git && cd ./urchinEngine
    cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -S ./ -B .build/release/
    cmake --build .build/release/ -- -j 8
    

• Execute tests:

  cd urchinEngine/test/
  ./testExecutor [unit] [integration] [monkey]
  

• Launch map editor:

  cd urchinEngine/mapEditor/
  ./urchinMapEditor