OIT OpenGL

This project demonstrates an approch for order independent transparency. For implementation details, see main.cpp

Build System

The build system that was chosen is the SCons build system (https://scons.org/).

Installing SCons

Scons required python 3 to be installed, along with pip. Once installed run

python3 -m pip install scons

or if you are on Windows

python -m pip install scons

Requirements

• OpenGL 4.3
• Anisotropic Filtering Extension
• Shader Storages Buffer Objects Extension
• Shader Atomic Counters Extension

Installing

Due to restrictions with file size and github, the model files and textures (except for dragon.mtl) are not included. However, the build system will handle the downloading and extracting of the files. In the project directory run

scons get-dependecies

Linux

Make sure that 64 bit GLFW3 and it's dev files are installed

Ubuntu

sudo apt install libglfw3
sudo apt install libglfw3-dev

Windows

Download 64 bit GLFW3 from https://www.glfw.org/download. If using MSBuild tools use the files from any of the lib-vc*. If using GCC, use the files from lib-mingw-w64

Building

The build system that was chosen is the SCons build system. To build, open a terminal in the project directory and run

scons

To speed up build times, you can use the -j flag to specify the number of theads to use, just like make. For example:

scons -j4

In some linux distributions, linking to glfw3 will fail and must be linked to glfw. If this happens, add '--glfw-linker-fix" to the build command

scons --glfw-linker-fix

Build Flags

--glfw-linker-fix       Links to glfw instead of glfw3
--debug-build           Enables debug logging
--debug-opengl          Enables OpenGL debug logging