Raytracer - Epitech Project

The repository for the Raytracer project.

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Table of contents

1. The purpose of the project
2. How to use Raytracer
3. How to launch
4. People on the project

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1. The purpose of the project

Raytracing is a 3D rendering technique used in computer graphics.

This technique consists of simulating the propagation of light in a virtual scene by tracing light rays from the camera or a light source and calculating their interaction with the objects in the scene.

The result is a realistic image with very realistic light effects, reflections, refractions and shadows.

Your goal is to create a program able to generate an image from a file describing the scene.

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2. How to use Raytracer

To use Raytracer you need a configuration file like the following:

scene =
{
    camera = {
        posx = -1.9;
        posy = 0.0;
        posz = 0.0;
        angle1 = 0;
        angle2 = 0;
    };
    shapes = (
        {
            shape = "sphere";
            x = 0;
            y = 0;
            z = 2;
            radius = 0.5;
            color = "1 1 1";
            light = "1 1 1 1.0";
        },
        {
            shape = "sphere";
            x = 0;
            y = 0;
            z = 0;
            radius = 0.8;
            rgb = "1 1 1 0.2";
        },
        {
            shape = "plane";
            x = 0;
            y = 0;
            z = 2;
            vectx1 = 1;
            vecty1 = 0;
            vectz1 = 0;
            vectx2 = 0;
            vecty2 = 1;
            vectz2 = 0;
            color = "1.0 1.0 1.0";
            light = "1.0 1.0 1.0 0.2";
            mirror = 0.98;
        },
        {
            shape = "plane";
            x = 0;
            y = 0;
            z = -2;
            vectx1 = 1;
            vecty1 = 0;
            vectz1 = 0;
            vectx2 = 0;
            vecty2 = 1;
            vectz2 = 0;
            rgb = "1 1 1";
            mirror = 0.98;
        },
        {
            shape = "plane";
            x = 2;
            y = 0;
            z = 0;
            vectx1 = 0;
            vecty1 = 1;
            vectz1 = 0;
            vectx2 = 0;
            vecty2 = 0;
            vectz2 = 1;
            rgb = "0.5 0.5 1.0";
            mirror = 0.98;
        },
        {
            shape = "plane";
            x = -2;
            y = 0;
            z = 0;
            vectx1 = 0;
            vecty1 = 1;
            vectz1 = 0;
            vectx2 = 0;
            vecty2 = 0;
            vectz2 = 1;
            rgb = "1.0 1.0 1.0";
            mirror = 0.98;
        },
        {
            shape = "plane";
            x = 0;
            y = -2;
            z = 0;
            vectx1 = 1;
            vecty1 = 0;
            vectz1 = 0;
            vectx2 = 0;
            vecty2 = 0;
            vectz2 = 1;
            rgb = "1.0 0.5 0.5";
            mirror = 0.98;
        },
        {
            shape = "plane";
            x = 0;
            y = 2;
            z = 0;
            vectx1 = 1;
            vecty1 = 0;
            vectz1 = 0;
            vectx2 = 0;
            vecty2 = 0;
            vectz2 = 1;
            rgb = "0.5 1 0.5"
            mirror = 0.98;
        }
    );
};

When creating the camera, you must define:

• The coordonates of the camera (posx, posy and posz)
• The angle of the camera (angle1, angle2)

You could also define:

• the field of view (fov)

When creating a shape, you must define:

• The shape
• its coordinates (x, y and z, all doubles)
• its texture. Depending on the shape, it can be:

• • a color defined with 'color'

• • a texture defined with:

• • • a color (rgb/rgba)

• • • a color and a light (rgb/rgba)

• • • a color, a light and a mirror value (double)

list of the available shapes:

• sphere
• plane
• triangle
• ambiant_light/ambiantLight/ambiant/light
• directional_light/directionalLight/directional
• object

When creating a sphere, you must also define:

• the radius (double)

When creating a plane, you must also define:

• the size of the plane via two vectors:

• • first vector defined like this:

• • • vectx1

• • • vecty1

• • • vectz1

• • second vector defined like this:

• • • vectx2

• • • vecty2

• • • vectz2

When creating a triangle, you must also define:

• the size of the plane via two points:

• • first point defined like this:

• • • x1

• • • y1

• • • z1

• • second point defined like this:

• • • x2

• • • y2

• • • z2

When creating an ambiant light, you must also define:

• The color (rgb/rgba, or a texture)

When creating a directional light, you must also define:

• The color (rgb/rgba, or a texture)
• the direction (x, y and z)

When creating an object, you must define:

• the path of the file (path/to/object.obj)

You can also define a group which contains lany of these shapes using group.

Warning: if the shape is not defined or invalid, the program will fail! Warning: each undefined value will be replaced by a default value !

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3. How to launch

To run the project:

> make
> ./raytracer <SCENE_FILE> with argument

THE arguments to return which are the following:

--blending or -b for Blending, which overlays the scene possibilities

--fov or -f for Field Of View, which changes the fov of the scene

--height or -h for Height, which changes the size we want for our scene

--width or -w for Width, which changes the width of our scene

--out or -o for Out, which changes the output file name

--rebound or -r for Rebound, which changes the number of bounce of the light

4. People on the project

Cyprien Nguyen-Van-Vien	Damien Benais-Captal	Pierre-Louis Leroy	Virgile Berrier

cyprien.nguyen-van-vien@epitech.eu damien.benais-captal@epitech.eu pierre-louis.leroy@epitech.eu virgile.berrier@epitech.eu