florianvazelle/gltessellation

Real-time adaptative level of detail with tessellation shader

glTessellation

Building

Build and run the standalone target

Use the following command to build and run the executable target.

cmake -B build
cmake --build build
./build/bin/glTessellation

Dependencies

• C++20 compiler (to use Mathematical constants) :
  • VS 2019 16.5
  • GCC 10+ or Clang 11+
• CMake for build system creation (>= 3.8)
• Conan for install packages (>= 1.0)

Example

My scene renders a sphere whose vertices are modified by a geometry shader, to look like a "planet". And the color is added according to the height of the vertex.
The camera can move in space.

• The sphere initially sent does not have many triangles.

• When the camera gets closer, we see the planet starting to become more detailed.

• When the camera is very close we see a very well defined planet.

References

Octree

• C Implementation
• As LOD System

OpenGL Wiki Shader

• Tessellation Control
• Tessellation

Tessellation Tutorial

• Shader Example

Papers

• Adaptive GPU Tessellationwith Compute Shaders
• A Real-Time Procedural Universe
• Efficient GPU Rendering of Subdivision Surfaces using Adaptive Quadtrees
• Terrain Tessellation with Geomipmapping
• Dynamic Feature-Adaptive Subdivision

Books

• ShaderX
• GPU Gems

Tools

• Pixar OpenSubdiv