OpenGL Rendering Engine

OpenGLScene.webm

A WIP 3D rendering engine built to learn graphics programming with the help of the LearnOpenGL tutorials. Interactive scene editing will be added later – for now everything is hardcoded in the main application loop.

Features

• Model loading: Imports complex 3D models and scenes (FBX, OBJ, etc.) along with their textures using Assimp (much to improve here, mostly copy-pasted from the tutorial...)
• Lighting:
  • Directional light
  • Multiple point lights with configurable attenuation
  • Blinn-Phong shading
• Shadow mapping:
  • Calculates directional light shadows using 2D depth maps
  • Calculates omnidirectional point light shadows using depth cubemaps and geometry shaders
  • Percentage-Closer Filtering (PCF) for softer shadow edges
• Camera system: Interactive 3D fly-camera with zoom
• Interactive shaders: Toggle between Phong, Constant and Depth visualization shaders at runtime

Future Plans

• Saving/loading scenes: Implement a scene graph and serialization system to save and load complex scenes
• Stencil outlining & object selection: Highlight selected objects using stencil buffer techniques and move them in-engine
• Advanced textures: Add support for normal maps etc.
• HDR & bloom: Implement high dynamic range rendering and bloom post-processing effects for light sources
• PBR...: More advanced shading models TBD

Controls

Key/Input	Action
WASDEQ	Move forward / backward / left / right / up / down
Mouse move	Look around (yaw/pitch)
Mouse scroll	Zoom (adjust field of view)
L	Toggle active shader (Phong / Constant / Depth*) (*not included in demo)
Space	Print current camera position to standard output (helps with object/light placement)
Escape	Close the application

Dependencies

• OpenGL 4.6 (Core Profile)
• GLFW: Window creation and input handling
• GLAD: OpenGL function pointer loading
• GLM: OpenGL Mathematics library for vector and matrix operations
• Assimp: Open Asset Import Library for loading 3D models
• stb_image: Image loading for textures

For building, the following should be retrieved and added to the project:

include/
├── third-party/
│   ├── glad/
│   ├── glm/
│   ├── KHR/
│   ├── stb_image.h
utils/
├── glad.c

Assets

The following open-source assets are used in the video demo:

• Modern Bedroom by Visthétique
• Ceiling Fan by Prince Obrymec