Recall Engine
by AmeliePick.
Project Description
Recall Engine is a modular game engine. Being developed for role-playing video games. Allows to create 2D/3D games in first/third person view, with elements of visual novel. Because the engine is modular you can choose exactly what you need to make your software. The engine follows the philosophy:
- Own solution works good or better than the existing one, and it's independent.
- Don't pay for what is not used(e.g lower performance, executable file size, etc).
- The performance is better than the compatibility.
- Works everywhere the OS runs.
The engine contains a lot of parts to use it separetly and it all has a low-level optimization and suports most popluar and last tecnologies. So you can use it to create not only games but also for a software.
Down below you can find engine's features, which are already completed or in the development so the list will be appended during the progress.
Features
Done.
In development.
In design.
Memory Management
- Fully custom memory management provides fast work with memory. The average delay for memory allocation operation is <≈2 ms.
- Automatic memory defragmentation controls proper memory usage and reduces latency and improves memory usage.
- Automatic garbage collection physically frees up unused memory, which avoids running out of memory.
Multithreading
- Create own threads or use lightweight threads(Task) without latency.
- Make parallel execution on CPUs without hyperthreading feature. You can run two parallel threads even if CPU doesn't support hyperthreading feature but it requires two or more physical cores.
- Simply manage and synchronize threads by yourself using special functions and objects.
- Low performance mode to reduce CPU usage for non-real-time applications.
I/O
- Work with any device, whether game controllers, keyboard, mouse or even any USB, COM and HID devices.
- Four modes of work: Windows, RawInput, DirectInput and XInput(only controllers and it also provides work with feedback).
- Different types of device events allows to create new control mechanics.
- Custom "Terminal" API provides a simple handling of input to any output device(file, display).
GUI
- Modern GUI for applications allows adjust every graphics element from the status bar to the button.
- Simple and understandable API allows to write a minimum of code for a graphical application.
- Create your own design in couple of minutes using simple markup.
Graphics
- "Slow CPU" mode to lower FPS drops.
- Frames sampling to make double postprocessing, integrate scaling ML algorithms and other stuff.
- Boosted buffering.
- Variable(VFR) and constant(CFR) frame rate support.
- Integrated Nvidia Driver's features.
- Automatic GPU overclocking/undervolting.
2D
- Create layered scenes, add animations.
- Work with images, gif, text and other objects via simple understandable API.
- Create own complex objects or code to draw something complicated.
- DirectX 11 and 12 support provides the hardware acceleration for drawing.
- Huge optimized render allows to use max power of a graphics card.
3D
- The module is at the design stage.
Audio
- DirectX audio components as additional to RE custom sound system to extend use of the engine.
- Play, mix the sounds with each other, create custom or use built-in effects.
- Supports all formats and containers which Windows 10 supports(based RIFF(i.e WAV, AVI, RMI) and also MP3, MP4, AAC, FLAC, etc).
- Custom low-level sound system which already include spatial audio or 3D Audio.
Visual Novel module
- Animate sprites, backrounds and so on.
- Manage audio. Add SFX to music and sounds.
- A convenient text output system that separates the code and text of the game. Support for custom fonts, text output animations.
- Custom script system.
Engine
- Collision detection.
- Complex UI elements.
- Custom build system.
- Code generation based on custom script system.
- In-game logic processing and features(e.g. task manager, etc).
Security
- Anti-debug protection.
- Dll injection protection.
- Files security certificate validation.
- Audio files author signature validation.
Other features
- The Accurate adjustment of all engine's parts allow to optimizie the software for a concrete hardware. For example you can adjust the memory limits, GC timeout, which Instuction Set Extensions will be used and many other parameters.
- The Third-party modifications support which allows to release DLCs, gives the opportunity to your community to create mods and support the software for a long time.
- The integration with popular tools for artists(Adobe Photoshop, 3dMax, Maya).
- Anti-debug/emulating mechanisms, memory and binary files protect, files(resources) authentication to protect it from modifying by the user.
Enhanced with
System specifications
It describes only Recall Engine's requirements and it's needs. At least the PC must run Windows 10.
CPU: It requires the SSE instruction set support, but it also provides the AVX-AVX512 support. Target architecture: x86, 64-bits only. Because the engine is targeting Windows 10, here is a table of minimal supported CPUs:
| Intel | AMD | |
| To run the engine | Pentium 4(Prescott) rev. E04 | Athlon64, Optero |
| For AVX usage | Sandy Bridge, rev. Q1 | Bulldozer, rev. Q4 |
If you want to support CPUs like i7 860, just don't use AVX compability methods of the engine because it secured from emulators and just will not start. The most fine way is to make some versions of your software or just to let old cpus to be gone.
RAM: At least 500 MB free, not more than 256 TB installed.
Storage: 23 MB for the engine and all extensions.
Graphics adapter(optional): Windows 10 can run without any graphics adapters(neither integrated nor dedicated) in headless mode.
| GUI render tasks | At least DirectX 9 |
| 2D/3D graphics | DirectX 11.1, DirectX 12 |
| Auto overclocking/undervolting* | GTX 700s, GTX 900s, GTX 10s, RTX20-50s |
* It's not recommended to apply the overclocking for any 5+ year-old GPU.
Written on Assembler(ml64), C, C++17.
Engine API: C++, REVNS (Recall Engine Visual Novel Script).
Demos
Demo 1. 2D with sfx and sound sfx.
Demo 2. Visual Novel example.
Demo 3. Visual Novel scene.
FAQ and reviews