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scene_file.md

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Scene description file

A scene file is a defined data structure that contains:

  • a collection of objects (objects are also called models)
  • one camera or more
  • one light point or more
  • textures (optional)
  • global render settings or options such as the resolution of the image.

Format

A scene description file must end by the .rt extension:

scene.rt

R   1920 1080
A   0.2                                                255,255,255

c   -50.0,0,20       0,0,1            70
l   -40.0,50.0,0.0                    0.6              10,0,255

sp  0.0,0.0,20.6     12.6                              10,0,255
pl  0.0,0.0,-10.0    0.0,1.0,0.0                       0,0,225
sq  0.0,0.0,20.6     1.0,0.0,0.0      12.6             255,0,255
cy  50.0,0.0,20.6    0.0,0.0,1.0      14.2 21.42       10,0,255
tr  10.0,20.0,10.0   10.0,10.0,20.0   20.0,10.0,10.0   0,0,255

Resolution

R 1920 1080
  • x render size
  • y render size

Must be declared only once in a scene.

Ambient lighting

A 0.2 255,255,255
  • ambient lighting ratio in range [0.0,1.0]
  • R,G,B colors in range [0,255]

Must be declared only once in a scene.

Camera

c -50.0,0,20   0,0,1   70
  • 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 -40.0,50.0,0.0   0.6   10,0,255
  • x,y,z coordinates of the light point
  • light brightness ratio in range [0.0,1.0]
  • R,G,B colors in range [0,255]

Sphere

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

Plane

pl 0.0,0.0,-10.0   0.0,1.0,0.0   0,0,225
  • 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]

Square

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

Cylinder

cy 50.0,0.0,20.6   0.0,0.0,1.0   14.2 21.42   10,0,255
  • x,y,z coordinates
  • 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]

Triangle

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