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#miniRT

A small ray tracing render in C

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Example - scenes/42.rt

INSTRUCTIONS

Download and compile (project works with Linux and MacOS)

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

Execute: ./miniRT scene_name.rt for showing render image in window or ./miniRT scene_name.rt --save for save it to bmp.

Control keys

Key Action
ESC Close window and exit
SPACE Next camera
S Save current image to bmp
Key Effect
F Sepia
Z Anti aliasing (shine on 3D figures)
R Rainbow
G Strange effect

Scene example

R 800 600
A 0.3 255,255,255

c   0,0,0       0,0,1    80
c   15,0,7      -1,0,0   80
l   -2,-2,0     0.3      255,0,255
ld  1,0,0       0.5      255,255,255

sp 0,-2,8     2.5        0,255,20
pl 2,3,0      0,1,0.1    5,200,235  
tr 1,1,9      0,0,9      1,-1,8     255,0,0
sq -2,-1,5    0.5,0.3,1  1.5        123,124,183
cy 2.5,0.2,6  0,1,1      1.5        3.0         255,3,123
cu 2,-2,6     1,0,1 1  	 155,99,71
py -4.5,2,9   0,-1,0     1          2           255,99,71

Resolution:

R 1920 1080
  • identifier: R
  • x render size
  • y render size (Only one declare per scene)

Ambient lightning:

A 0.2 255,255,255
  • identifier:A
  • ambient lighting ratio in range [0.0,1.0]: 0.2
  • R,G,B colors in range [0-255]: 255, 255, 255 (Only one declare per scene)

Camera:

c  -50.0,0,200,0,1   70
  • identifier:c
  • x,y,z coordinates of the view point: 0.0,0.0,20.6
  • 3d normalized orientation vector. In range [-1,1] for each x,y,z axis: 0.0,0.0,1.0
  • FOV: Horizontal field of view in degrees in range [0,180]

Light (spot):

l   -40.0,50.0,0.0  0.6 10,0,255
  • identifier: l
  • x,y,z coordinates of the light point: 40.0,50.0,0.0
  • the light brightness ratio in range [0.0,1.0]: 0.6
  • R,G,B colors in range [0-255]: 10,0,255

Light (parallel):

ld  1,0,0       0.5      255,255,255
  • identifier: l
  • x,y,z coordinates of the light oriental: 1,0,0
  • the light brightness ratio in range [0.0,1.0]: 0.5
  • R,G,B colors in range [0-255]: 10,0,255

Sphere:

sp  0.0,0.0,20.6  12.6  10,0,255
  • identifier: sp
  • x,y,z coordinates of the sphere center: 0.0,0.0,20.6
  • the sphere diameter: 12.6
  • R,G,B colors in range [0-255]: 10,0,2557

Plane:

pl  0.0,0.0,-10.0  0.0,1.0,0.0  0,0,225
  • identifier: pl
  • x,y,z coordinates: 0.0,0.0,-10.0
  • 3d normalized orientation vector. In range [-1,1] for each x,y,z axis: 0.0,0.0,1.0
  • R,G,B colors in range [0-255]: 0,0,255

Square:

sq  0.0,0.0,20.6   1.0,0.0,0.0  12.6  255,0,255
  • identifier: sq
  • x,y,z coordinates of the square center: 0.0,0.0,20.6
  • 3d normalized orientation vector. In range [-1,1] for each x,y,z axis: 1.0,0.0,0.0
  • side size: 12.6
  • R,G,B colors in range [0-255]: 255,0,255

Cylinder:

cy  50.0,0.0,20.6   0.0,0.0,1.0  10,0,255   14.2 21.42
  • identifier: cy
  • x,y,z coordinates: 50.0,0.0,20.6
  • 3d normalized orientation vector. In range [-1,1] for each x,y,z axis: 0.0,0.0,1.0
  • the cylinder diameter: 14.2
  • the cylinder height: 21.42
  • R,G,B colors in range [0,255]: 10,0,255

Triangle:

tr 10.0,20.0,10.0 10.0,10.0,20.0  20.0,10.0,10.0  0,0,255
  • identifier: tr
  • x,y,z coordinates of the first point: 10.0,20.0,10.0
  • x,y,z coordinates of the second point: 10.0,10.0,20.0
  • x,y,z coordinates of the third point: 20.0,10.0,10.0
  • R,G,B colors in range [0,255]:0, 255, 255

Cub:

сu 2,-2,6     1,0,1   3.2  	 155,99,71
  • identifier: cu
  • x,y,z coordinates of the center of the base of the cylinder: 2,-2,6
  • 3d normalized orientation vector. In range [-1,1] for each x,y,z axis: 1,0,1
  • side size: 3.2
  • R,G,B colors in range [0-255]: 155,99,71

Pyramid:

py -4.5,2,9   0,-1,0     3          2           255,99,71
  • identifier: py
  • x,y,z coordinates of the center of the base of the pyramid: 0.0,0.0,20.6
  • 3d normalized orientation vector of the base. In range [-1,1] for each x,y,z axis: 1.0,0.0,0.0
  • size of the side of the base of the pyramid: 3 . pyramid height: 2
  • R,G,B colors in range [0-255]: 255,99,71

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Example - scenes/all_figures.rt