Nitro

Nitro is a real-time 3D renderer built using C++ and OpenGL that aims to implement the latest rendering techniques such as:

• Physically Based Rendering (PBR).
• Ambient Occlusion.
• Parallax Occlusion Mapping.
• Normal Maping.
• Environment Mapping.
• Dynamic Shadow Mapping.
• Atmospheric Scattering.
• Bloom.
• Volumetric lighting.
• Deferred Rendering.

Also, another of the objectives of Nitro is to implement core aspects of a renderer from scratch (except model loading since we want to test the renderer with a number of models):

• Virtual Camera: Movement and Rotation.
• Light Sources: Point Lights, Directional Lights and SpotLights.
• Primitives: Planes, Cubes and Spheres.
• Event System.

How to build:

Clone the project:

git clone https://github.com/rxwp5657/Nitro.git

Download and init project dependencies with the following command:

git submodule update --init --recursive  lib/

Create a build directory on the project root folder ../Nitro/build and change into that directory:

mkdir build && cd build

Type the following commands:

cmake ..
make && ./nitro

How to use:

Move through the scene by using WASD and your mouse as you like and exit by pressing ESC on your keyboard (artifacts appearing becuase of GIF format):

Progress:

Point Light Shadow Mapping:

Spot Light Shadow Mapping:

Parallax Occlussion Mapping:

Without Parallax vs Parallax

Environment Mapping

To be uploaded ...

PBR pipeline implementation (Still in development)

To-Do list:

• Dynamic Variance Shadow Mapping:
  • Gaussian Blur (Spotlights).
  • Implement Percentage-Closer Soft Shadows.
  • Cascade Shadow Mapping.
• PBR:
  • Add PBR materials to Material struct.
  • Add PBR materials to Model loader.
  • Implement BRDF algorithm on shaders (Cook–Torrance? or Lambert or Brent Burley (Disney)).
• Implement Deferred Rendering:
  • Implement G-buffer structure.
  • Implement G-buffer components (Diffuse, Normla, Depht, etc.).
  • Implement Light Volume.
• Study and Implement Atmospheric Scattering.
• Study and Implement Ambient Occlusion.
• Study and Implement Bloom.
• Study and Implement Volumetric Lighting.
• Study and Implement Image-Based Lighting.