Vibrant Engine

A rendering engine focused on 2D lighting and the use of normals to create beautiful scenes.

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Features

• Dynamic Lighting
• Normal Support
• Framebuffer Scaling

Optimization

Vibrant is optimized through and through, with the following notable optimization tricks used:

Name	Perf. Before	Perf. After
Use of C++ (low level language)	---	---
Optimized object structure	3.2 GB	1.9 GB
Replaced raw pointers with STL	1.9 GB	1.8 GB
Cache textures, vertex arrays, GPU buffers	1.8 GB	420 MB
Cache shaders and return on request	420 MB	405 MB
Remove unnecessary data from Texture struct	405 MB	394 MB
Implement Deferred Rendering	---	52 FPS
Remove variables from deferred shaders	52 FPS	65 FPS
Used XML for level parsing (+ readability)	---	58 ms (?)
Used std::string_view instead of std::string	---	---
Used const references to minimize copy operations	394 MB	340 MB
Used std::map in include/log.h, O(n^2) time to O(n)	---	---
Used clang-format and clang-tidy with Google Style	---	+ aura

(Tested with a scene with 10000 objects, Rig info: 12900K, RTX 3060, Windows 10 22H2. Averages of 10 runs after stabilizing. Used ImGui to extract FPS info. FPS measurements are the averages of a timespan of 10 seconds (after initialization). Level loading time is extracted from measurements using std::chrono implemented in LoadScene(std::string_view), in src/scene.cc. Level saving time is extracted from measurements using std::chrono implmeneted in SaveScene(const Scene& scene, std::string_view path), in src/scene.cc. Memory usage measurements taken from Task Manager (Windows))

Installation

Linux

1. Install dependencies pugixml

• Example sudo pacman -Sy pugixml (For Arch Linux) You will also need kdialog OR xdialog OR applescript for UI input. If you lack any of these, tinyfiledialogs will fall back to console input.

2. Download the latest Linux release from the releases page
3. cd into the folder and run the executable cd /path/to/vibrant/executable;./vibrant If the program throws an error complaining about missing dependencies, install them from your distro's package manager.

Windows

1. Download the latest Windows release from the releases page
2. Run the executable (vibrant.exe)