lamarqua / le3d

A straightforward and easy to use 3D software renderer for real-time retro graphics.

le3d

LightEngine 3D
Version 1.7 - 04/06/2018

A straightforward C++ 3D software engine for real-time graphics.
The engine aims to be a minimal and clear implementation of a simplified fixed pipeline.
Code has been designed for resource constrained platforms.

Build status - Linux, MacOS, Amiga (GCC / CLang)

Build status - Windows (MSVC)

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A project maintained by Fred's Lab
http://fredslab.net

This is open source software released under the MIT License, please refer to LICENCE file for more information.

Currently supported platforms:

• Microsoft Windows XP, 7, 8 and 10
• Linux based operating systems
• MacOS X
• AmigaOS 3.x (m68k)

Core engine

Source code / examples / documentation
Frédéric Meslin
Twitter: @marzacdev
Email: [e-mail]

CMake scripts / Amiga + MacOS support
Andreas Streichardt
Twitter: @m0ppers
Email: [e-mail]

Exceptions

Mesh textures
In the example folder, one or more textures on the 3D models have been created with photographs from Textures.com.
These photographs may not be redistributed by default;
Please visit:
http://www.textures.com
for more information.

Skybox texture
In the example folder, the meadow skybox has been created by Emil "Humus" Persson and it is licenced under the Creative Commons
Attribution 3.0 Unported License.
Please visit:
http://www.humus.name/index.php?page=Textures
for more information.

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Renderer (Portable C++ / ASM (SSE2))

The renderer:

• Renders meshes
• Renders billboard sets
• Does simple transformations (rotation, scaling, translation)
• Performs 3D clipping
• Performs 2D clipping
• Performs projection
• Does backculling
• Performs Z-sorting

The rasterizer:

• Draws textured triangles
• Handles mipmapping
• Handles alpha blending
• Applies solid color per triangle
• Applies quadratic fog per fragment
• Performs perspective correction
• Does not perform texture filtering
• Does not draw anti-aliased edges
• Align vertex coordinates to nearest pixel coordinates

The lighting system:

• Handles point lights
• Handles directional lights
• Handles ambient lights

Backends (Native OS code)

window / draw / gamepad / timing / system

The backend - Windows version:

• Handles windows creation / management
• Handles mouse events
• Handles keyboard events
• Handles graphic contexts with GDI
• Handles joysticks with rumble support (with Microsoft XInput V1.3 drivers)
• Supports Windows XP / 7 / 8 and 10 OS
• Supports fullscreen mode

The backend - Linux version:

• Handles windows creation / management (with X11)
• Handles mouse events (with X11)
• Handles keyboard events (with X11)
• Handles graphic contexts (with X11)
• Handles joysticks with rumble support (with evdev interface)
• Supports virtually all Linux based OS

The backend - MacOS version:

• Similar to Linux version
• Needs X11 (XQuartz) for MacOS
• No native COCOA support
• No joystick support yet (soon)

The backend - Amiga version:

• Similar to Linux version
• Needs cybergraphics installed
• No joystick support yet
• AmigaOS 3.x
• Too slow on old m68k hardware (use vampire)
• PowerPC support unclear/untested
• AmigaOS 4.x support unclear/untested

File formats

Supported bitmap / texture formats:

• Uncompressed 24bit RGB windows bitmap
• Uncompressed 32bit RGBA windows bitmap
• Import & export functions

Supported 3D model formats:

• Wavefront OBJ
• Import & export functions

Limitations

• No Z-buffer
• No antialiasing
• Single core support

Comparison

It renders graphics a bit better than a Sony Playstation one.

Building

Please refer to BUILDING.md