Forest Engine is a C++ / OpenGL Game Engine made from scratch with the only purpose of improving my gamedev and programming skills.

Forest Engine has been the latest iteration of my Game Engine (previously DruidEngine and before that it was ThiefEngine).

After about 10 years of learning I've decided to stop working on it and release the code on GitHub in case it's helpful or interesting to other people.

The state I leave the engine is: stable but not usable, there are still known bugs and pending tasks, so don't take this code as a reliable source of knowledge.

• First, download and install dependencies: ./scripts/dependencies.sh
• Build project: python3 ./scripts/build.py -[ruixlch]
  • -h Show help.
  • -r Compile Release, Debug by default.
  • -u Compile Unit Tests suite. (NEEDED BY test.sh)
  • -i Compile Integration Tests suite. (NEEDED BY test.sh)
  • -x Compile Tools.
  • -l Enable Logs.
  • -p Enable Profiler.
  • -c Clean the project.
• Run unitary tests (optional): ./scripts/test.sh
• Generate documentation (optional): ./scripts/doc.sh

Example: build debug tool_Editor with this command python3 scripts/build.py -lp --tool=Editor --gpuDbg

Not available yet.

• code: Source and Headers.
• config: Engine and scenes config files.
• scripts: Contains scripts described above.
• compiledLibs: Contains the libForest.a. Generated by scripts/build.py.
• binaries: Generated by scripts/test.sh.. Contains the test executable files (both unitary and integration).
• test: Set of tests. Unitary and Integration.
• tools: Set of tools.
• dependencies: Generated by scripts/dependencies.sh. Contains third party libraries.
• build: Generated by scripts/build.py.

Run unitary tests with ./scripts/test.sh. Result are stored in binaries/output. This command will print the results in terminal.

Run integration test by executing ./binaries/test_integration. Result is stored in log.txt.

Here in my blog you can find all the devlogs of my Game Engine, from 2D initial stages to the latest 3D version: Devlogs

• OpenGL 4.x
• Batching
• Shaders
• Support for Texture Atlases
• Animation using Spritesheet
• Simple UI
• Scene management
• Perspective / orthographic camera
• Stencil
• Math module
• Simple scripting
• Loading 3D models with GLTF
• Skeletal Meshes
• Skeletal Animation
• GPU Skinning
• PBR Shading
• Directional Light
• Shadow Mapping