TimeToDX

A real-time 3D renderer built with DirectX 11, featuring physically-based rendering (PBR), image-based lighting (IBL), and a deferred rendering pipeline. Inspired by Marmoset Toolbag.

Features

Rendering

• Deferred Rendering Pipeline - Compute shader-based lighting for efficient multi-light scenes
• Physically-Based Rendering (PBR) - Cook-Torrance BRDF with metallic-roughness workflow
• Image-Based Lighting (IBL) - HDR environment maps with irradiance and prefiltered specular
• Z-Prepass - Early depth testing for overdraw reduction

Scene Management

• Hierarchical Scene Graph - Parent-child transform propagation
• glTF Import - Load 3D models with materials and textures
• Multiple Light Types - Point, directional, and spot lights
• Object Picking - GPU-based selection via object ID buffer

Tools

• ImGui Interface - Scene hierarchy, material editing, light properties
• Gizmo Manipulation - Translate, rotate, scale objects
• Undo/Redo System - Command pattern with transaction support
• BVH Visualization - Debug view of bounding volume hierarchy

Screenshots

Requirements

• Windows 10/11
• Visual Studio 2022 (or compatible compiler with C++20 support)
• CMake 3.10+
• DirectX 11 compatible GPU

Building

Clone the Repository

git clone https://github.com/efimco/DOCXEngineDirectX.git
cd DOCXEngineDirectX

Configure with CMake

mkdir build
cd build
cmake ..

Or use CMake presets:

cmake --preset=default

Build

Using Visual Studio:

1. Open build/TimeToDX.sln
2. Set TimeToDX as the startup project
3. Build and run (F5)

Using Command Line:

cmake --build build --config Release

Run

The executable expects resources to be at ../../res/ relative to the working directory. When running from Visual Studio, the working directory is automatically set.

cd build/Release
TimeToDX.exe

Render Pipeline

┌─────────────┐
│  ZPrePass   │  Depth-only rendering
└──────┬──────┘
       ▼
┌─────────────┐
│   GBuffer   │  Albedo, Normal, Position, Metallic/Roughness, ObjectID
└──────┬──────┘
       ▼
┌─────────────┐
│  CubeMap    │  IBL: Irradiance, Prefiltered env, BRDF LUT
└──────┬──────┘
       ▼
┌─────────────┐
│  Deferred   │  Compute shader lighting (PBR + IBL)
└──────┬──────┘
       ▼
┌─────────────┐
│   FSQuad    │  Fullscreen blit to backbuffer
└──────┬──────┘
       ▼
┌─────────────┐
│    ImGui    │  UI overlay
└─────────────┘

Controls

Input	Action
RMB + WASD	Fly camera
RMB + Mouse	Look around
Scroll	Zoom
LMB	Select object
W/E/R	Translate/Rotate/Scale gizmo
Ctrl+Z	Undo
Ctrl+Y	Redo

Dependencies

All dependencies are included in thirdparty/Include/:

• GLM - Mathematics library
• Dear ImGui - Immediate mode GUI
• ImGuizmo - 3D gizmos
• tinygltf - glTF 2.0 loader
• stb_image - Image loading

Documentation

See the doc/ folder for detailed documentation:

• Deferred Rendering
• Scene Graph
• Object Picking

License

Add your license here

Acknowledgments

• HDR environment maps from Poly Haven
• Inspired by Marmoset Toolbag