Ray Tracer

Introduction

Real Time Ray Tracer

This Ray Tracer Renderer provides the ability to move freely in the scene with the keyboard and mouse, while streaming live the results from the GPU to the screen.

Table of Contents

1. About The Project
2. Getting Started
   • Prerequisites
   • Installation
3. Usage
4. Demo Videos and Screenshots
5. Citations

About The Project

This project is a ray tracer / path tracer visualizer that provides a way to move freely in the scene with the keyboard and mouse similar to a free camera in a world. The tracing algorithm is calculated on the GPU using the CUDA C++ toolkit. The program is written mainly in C++20 and CUDA-C++17 and built with cmake. To present the result in realtime, I used OpenGL with glfw, glew to have a windowed program and also ImGui to have a simple UI.

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Getting Started

Prerequisites

1. Make sure you have the CUDA toolkit installed and have NVIDIA nvcc compiler installed.
2. Have cmake 3.8+ installed.

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Installation

1. Clone the repo

   git clone https://github.com/Sahar-E/Raytracer.git raytracer

2. cd raytracer && mkdir build && cd build
3. cmake ..
4. cmake --build .

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Usage

Launch the application executable. To move the camera, use the following keybindings:

• W - move the camera forward.
• S - move the camera backward.
• D - move the camera right.
• A - move the camera left.
• SPACE - move the camera up.
• SHIFT+SPACE - move the camera down.
• MOUSE_PRESS_LEFT + MOUSE_MOVEMENT - pan the camera according to the mouse movements.

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Demo Videos and Screenshots

Example video for Real Time raytracing:

Screenshot of the program:

Screenshot of the save from the video:

Last rendered image:

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Citations and sources

• Scratch Pixel
• Ray Tracing in One Weekend
• NVIDIA CUDA Guides
• TheCherno - Youtube channel
• demofox blog about Programming, Graphics, Gamedev...

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