/miniRT-1

Simple ray tracing on CPU

Primary LanguageCMIT LicenseMIT

MiniRT - Ray tracer

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Our really first Ray Tracer!

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

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

  • 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

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

Scene format

  • 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

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