🫧 gkern: Graphics Kernel

gkern is a flexible, highly configurable, and extensible render engine. It's designed for both realtime and offline rendering, with a focus on robustness, performance, and ease of use. It is written in C so it is easy to use with other languages.

📌 Currently the library renders using OpenGL. I'm trying to integrate with Metal, Vulkan, DirectX

HISTORY: The main purpose was render AssetKit content. Then it became general purpose rendering and graphics library.

Features:

• Similar scene data structure with COLLADA/glTF
• Shader generator for common materials (phong, blinn, lambert, const)
  • This generator also supports textures, shadowmaps ... all feeatures to render scene perfectly and fast
• Shader manager (currently for common profile)
• Transform caching
• Uniform location caching
• Built-in trackball
• Multi-pass rendering
• Rendering to Texture
• Multiple Render Targets
• Textures
• State Manager / Caching
• Frustum Culling
• Configurable shadowmaps: Yes you can select which technique to use! More techniques may be supportted by time
  • Basic/Simple Shadow Maps
  • Cascaded Shadow Maps (PSSM)
• Order Independent Transparency
  • Weighted, Blended OIT
  • Some other techniques aill also be supported natively
• PBR materials
  • Metallic-Roughness Workflow
  • Specular-Glossiness Workflow
• Simple animations
• Skeletal animations
• Morph animations
• ...
• and some built-in helpers for many common tasks and more by fetures time...

Todo

• [ ] Real-Time Path Tracing
• [ ] Order objects before rendering
• [x] PBR
• [x] Transparency
• [ ] Occlusion Culling
• [ ] Level of Detail for mesh
• [ ] Multithread rendering
• [ ] Instanced Rendering
• [ ] Animations
  • [x] Autoreserve animations
  • [x] Play count...
  • [x] Simple Animations
  • [ ] Keyframe animations
    • [x] Animate float/vec3/vec4
    • [ ] Interpolations
      • [x] STEP
      • [x] LINEAR
      • [x] CUBIC BEZIER SPLINE
      • [ ] CUBIC HERMITE SPLINE
      • [ ] B-SPLINE
      • [ ] CARDINAL SPLINE
  • [x] Skeletal animations (working on this)
  • [x] Morph animations
• [ ] ...

Screenshots

Build

todo

Notes

• This library is still unshaped, wait this until AssetKit finished.
• After finished this AssetKit and library, I'll publish documentation and update README.
• Also check simple-collada-viewer repo to see an example to how to use this