MiniRT - Ray tracer

Our really first Ray Tracer!

• Intro
• Usage
• Features
• Scene format
• Example

Intro

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The “Ray Tracing” method, developed for the first time in 1968 (but improved upon since) is even today more expensive in computation than the “Rasterization” method. A ray-tracing project implemented on CPU. Allows you to generate scenes in 3D containing objects. Each scene can be be viewed by a set of cameras characterized by its position, direction and Field Of View (FOV). This project can be used only with Minilibx so it can work only on macOS.

Usage

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Installation

git clone https://github.com/zurag/miniRT.git && cd miniRT && make

Starting the program

./miniRT <scene_name.rt>

<Scene_name.rt> files are located in the srcs/scenes_files/

Features

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• Raycasting
• Object shadows
• Correct intersections of the objects
• Real-time camera movement / rotation
• Multithreaded render
• Antialiasing
• Blinn–Phong lighting model
• Reflections of objects
• Creating screenshots

Supported figures

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• Sphere
• Plane
• Cylinder
• Cone
• Hyperboloid
• Paraboloid

Scene format

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• Each element first's infomation is the type identifier (composed by one or two character(s)), followed by all specific information for each object in a strict order such as:

• Ambient lightning:

  • A 0.2 255,255,255
  • Identifier: A
  • Ambient lighting ratio in range [0.0,1.0].
  • R,G,B colors in range [0-255].
    
    

• Camera:

  • c -50,0,20 0,0,1 70
  • Identifier: C
  • x,y,z coordinates of the view point.
  • 3d normalized orientation vector. In range [-1,1] for each x,y,z axis.
  • FOV : Horizontal field of view in degrees in range [0,180].
    
    

• Light:

  • l -45,50,0 0.6 10,0,255
  • Identifier: L
  • x,y,z coordinates of the light point.
  • The light brightness ratio in range [0.0,1.0].
  • R,G,B colors in range [0-255].
    
    

• Sphere:

  • sp 0,0,20.6 12.6 10,0,255
  • Identifier: sp
  • x,y,z coordinates of the sphere center.
  • The sphere diameter.
  • R,G,B colors in range [0-255].
    
    

• Plane:

  • pl 0,0,-10 0,0.5,0 0,0,225
  • Identifier: pl
  • x,y,z coordinates.
  • 3d normalized orientation vector. In range [-1,1] for each x,y,z axis.
  • R,G,B colors in range [0-255].
    
    

• Cylinder:

  • cy 50,0,20.6 0,0,1 10,0,255 14.2 21.42
  • Identifier: cy
  • x,y,z coordinates of the cylinder center.
  • 3d normalized orientation vector. In range [-1,1] for each x,y,z axis.
  • The cylinder diameter.
  • The cylinder height.
  • R,G,B colors in range [0-255].
    
    

Example of .rt file

A 0.2 255,255,255

L 0,20,0 1 255,255,255

C 0,0,5 0,0,-1  70

pl 0,-0.5,0 0,1,0 104,104,104
sp 0,1,0 1 220,0,0
sp -2,1,0 2 107,159,0

>>>>>>> 43c3a5fc1752a4b3637599d87d4db1f9ad791ede