Rt

générer des images de synthèse selon la méthode du Ray-Tracing. Ces images de synthèse représentent une scène, vue d’une position et d’un angle spécifiques, définie par des objets géométriques simples, entiers ou partiels, et disposant d’un système d’éclairage.

Installing

install SDL2.<br>

• Linux :

$ sudo apt install libsdl2-2.0-0 libsdl2-gfx-1.0-0 libsdl2-image-2.0-0 libsdl2-mixer-2.0-0 libsdl2-net-2.0-0 libsdl2-ttf-2.0-0

• Mac (takes time) :

$ brew install sdl2 sdl2_image sdl2_ttf

Then run :

$ make

Compiling

Use make for compiling all files.

When you have already installed SDL2 library you can use this simple rules:

• make: Compile all.
• make clean: Delete temporary files.
• make fclean: Delete executable Rt file & libft.
• make re: It's rules - make fclean & make in one.

Usage

The programm takes a scene written in xml as an argument. Multiple scenes are directly available in the directory "./scenes2/" .

$ ./rt 'file_name'

• save flag

$ ./rt 'file_name' --save

if you have more then 1 camera in the scene

• [o | p]: Moving camera forward | Moving camera backward.
• [f | g]: stretch texture | stretch back texture.
• [h | j]: shift texture to right | shift texture to left.

Features

Basics

• 4 objects : sphere, plane, cylinder, cone
• Multiple light sources
• Phong shading
• Shadows
• Translations & rotations (camera & objects)

Limited objects

• Each object can be cut on 3 different axes
• These 3 axes can be either the world axes or the object axes
• Translations & rotations are still working with cut objects
• Planes can either be cut into rectangles or circles

Textures

• Each object can have a texture put on it
• Variable scale & position
• Can use alpha channel to set the transparency of the object
• Can size the object (sets its limits)
• 24 bits & 32 bits images support

Refraction / Reflection

• Both have adjustable percentages
• Implementation of Snell-Descartes's indice of refraction
• A semi-transparent object has its colors projected in its shadow
• Checkerboard / rainbow

User Interface

• hover effect

Visual effects

• Anti-aliasing
• Sepia & grey filters
• Stereoscopy
• blur
• cartoon

<img src="imgs/aba.png" height="800" width="800"> # 

Lights

• Direct & parallel lights
• Colored lights
• multi lights
• ambient %

Optimization

• Pixelation
• Multi-threading

<img src="imgs/ap.png" width="837" height="525">