The aim of this project is to creat a program able to render a scene with 3D objects using a ray tracing algorithm.

3 tipes of rendering engine:

• rend_term a real time terminal engine (only in black and white)
• rend_img a direct light only engine (fast but unaccurate)
• rend_img_p an ambient light sampling engine (complete render enginge with Montecarlo integration)

2 tipes of light:

• l_point (a spheric light source)
• sun (ambient light from given direction)

2 tipes of object:

• sphere
• plane

Download the ERTR directory and run make then execute build/ertr

An example program is given in the main.cpp file.
You can edit that or integrate the library in your software coping the 3 folders (GMath, lodepng and rend) and including the rend.h library.

In order to use the library:

• create a camera object camera(double lx,double ly,double df) where lx-ly are the sizes of the camera screen and df is the focal distance
• create a move function function void move(camera& cam, vector<object*>& obj, vector<light*>& lig, double n) that will be the function that iterate the movement of the objects of the scene at each frame
• create a scene object scene(camera c, (*move) m)
• create objects and lights of the available classes and add theme to the scene with the methods of the scene class add_obj(object& o) and add_lig(light& l)
• render the scene with one of the available engine using the respective method of the scene class

All the entities (camera, objects and lights) have movement and rotation methods that can be used to animate the scene in the movement function