3D CPU Engine

My very first 3D engine! This is a simple 3D rendering engine using CPU (no GPU), for learning purpose. The main goal of this project was to understand the low-level components of a 3D engine (e.g., rendering pipeline, drawing algorithm, maths for 3D, rendering loop), as well as learning the C++ language. Therefore, I used few libraries and tried to re-implements everything, such as math library and drawing algorithms.

Features

Math library
- Vectors 2
- Vectors 3
- Vectors 4
- Matrix 3
- Matrix 4
- Matrix Transformations
  - Translation
  - Scaling
  - Rotations
  - LookAt
  - Perspective
  - Project 3D point into 2D screen
Mesh
- Loading from JSON (.babylon format)
Rendering
- Draw line
  - DDA algo
- Draw filled triangle
  - Scanline Algorithm
  - Scanline Algorithm with z-buffering
  - Scanline Algorithm with z-buffering and Flat-Shading
  - Scanline Algorithm with z-buffering and Gouraud Shading
Render engine
- Render loaded meshes (by default, renders Suzanne monkey)
- Zoom in / out
SSE4.1 optimization (used by the math library)

Dependencies

Dependencies marked with (CMake) are automatically downloaded by CMake and placed in the dependencies folder. The Others must be installed manually (generally system-wide install).

SDL2 (Must be installed system-wide)
Boost property tree (Must be installed system-wide)
GoogleTest (Downloaded by CMake)

Build instructions (Linux only)

Uses C++11
Requires pragma once support

Build and run engine (CMake)

# Manual instructions
mkdir build
cd build
cmake ..
make -j2
make runEngine

# Automated script
./build.sh

Build and run tests (CMake)

mkdir build
cd build
cmake ..
make -j2
make runAllTests

# Automated script
./build.sh

Hard work

As you may see, Gnu and Panda have been working really hard on this project! Sometime, they even forgot to eat the bamboo. (At least Panda, Gnu probably prefers the emacs source code).

Screenshots

Author

Constantin Masson (geekymoose)

geekymoose/3d-cpu-engine