Cristian Gora
a36ed3a902
Engine: - Create, resize and update functions now restore the bindings they touch instead of leaving their own objects bound or resetting to 0 (Texture, FrameBuffer, Mesh, UniformBuffer) - Texture::bind/unbind switch back to texture unit 0 afterwards, so later texture binds can't replace a material's specular map - Add gl_get_binding() helper to read the current binding - Renderer remembers the wireframe mode (new is_wireframe()); draw_debug_wireframes restores it instead of always disabling it, which fixes H having no effect while debug wireframes are shown main.cpp (same behavior and UI): - main() only sets up the window and renderer; all GL resources live in run() and are released before Renderer::shutdown() - One function per scene and a shared create_textured_material() - Split app state into AppState, CameraInput and PerformanceStats; drop the duplicate delta_time and static toggle variables - Move the scene pass to render_scene() and the overlay to draw_overlay(); name the light box and overlay constants - Clear the mouse callback before AppState is destroyed
Fan Engine
A minimal 3D renderer written in C++ and OpenGL 3.3 Core.
NOTE: The engine is still in development. Expect breaking changes.
Building
The only tested platform at the moment is GNU/Linux (x86_64).
To build the project you'll need to have GLFW already installed system-wide, the rest of the dependencies are already included.
After that, building comes down to just running the included Makefile.
$ make # optionally pass -j$(nproc)
Features
This is the current state of the engine architecture:
flowchart TB
subgraph Infrastructure["Infrastructure"]
direction LR
subgraph Platform
direction TB
Window --> GLFW
Window --> glad
Window --> ImGui["Dear ImGui"]
end
subgraph Loading
direction TB
Loader --> tinyobjloader
Loader --> stb_image
end
end
subgraph Application
direction LR
Framebuffer
Renderer --> Camera
Renderer --> Scene
Renderer -->|Updates| UniformBuffer
Renderer -->|Owns| ResourceCache
end
subgraph World
direction LR
subgraph SceneGraph["Scene Graph"]
direction TB
Scene --> Entity
Entity --> Transform
Entity --> Mesh
Entity -.->|Optional override| Material
Mesh -->|Partitions| SubMesh
SubMesh -->|Owns| Material
end
subgraph Lighting
direction TB
Scene --> LightEnvironment
LightEnvironment --> DirectionalLight
LightEnvironment --> PointLight
LightEnvironment --> SpotLight
end
end
subgraph SceneData["Scene Data"]
direction LR
subgraph Geometry
direction TB
Mesh --> Vertices
Mesh --> Indices
end
subgraph Resources
direction TB
Material --> Shader
Material --> Texture
UniformBuffer -->|Global data| Shader
ResourceCache -.->|Caches, falls back| Texture
ResourceCache -.->|Caches, falls back| Shader
end
end
tinyobjloader -->|Generates| Entity
Texture -.->|Decodes via| stb_image
classDef application fill:#7c3aed,stroke:#4c1d95,color:#fff
classDef world fill:#2563eb,stroke:#1e3a8a,color:#fff
classDef data fill:#0f766e,stroke:#134e4a,color:#fff
classDef loading fill:#d97706,stroke:#92400e,color:#fff
classDef platform fill:#64748b,stroke:#334155,color:#fff
class Renderer,Scene,Camera,Framebuffer,ResourceCache application
class Entity,Transform,Mesh,SubMesh,Material,LightEnvironment world
class UniformBuffer,Shader,Texture,Vertices,Indices,DirectionalLight,PointLight,SpotLight data
class Loader,tinyobjloader,stb_image loading
class Window,GLFW,glad,ImGui platform