Sunday, December 26, 2010

POV-ray + Python - Scene Creation

Brief recap:  this recipe from the Python cookbook webpage is the basis for an api for POV-ray from Python.  I added an Object class to the api for more flexibility in manipulating pre-made POV-ray objects.

This final post in the POV-ray series deals with an attempt to create a scene.  I want to draw some pysanky eggs on a board with pegs in it for the eggs to stand on.

For the wood texture of the board I've used T_Wood10 from the POV-ray woods.inc library.  This requires the inclusion of the woods.inc library in the Python code:

file = pov.File('test5.pov', 'colors.inc', 'woods.inc')

test5.pov is my output file; colors.inc and woods.inc are my include files.

Because the api deals exclusively with text, the wood texture will have to be put in as a string literal complete with POV-ray's curly brackets:

testblock = pov.Box((-15, -6.50, -18), (15, -2.00, -3), 
    texture = '{T_Wood10}')

As for the scene itself:
This is good for illustrating the scene's design, but it's not very realistic.  The eggs look like they're wrapped in cellophane.  I tried introducing some focal blur:

cam = pov.Camera(location = (0, 5, -35), look_at = (0, 0, 2),
    focal_point = (0, 2, -10), aperture = 0.4, blur_samples = 20)

This looks more realistic, but blurry.  It would probably serve a remote corner of a scene better rather than the main object.

At this point it's really the nuances of POV-ray scene creation that will make a difference.  The purpose of this post and the last three was to show that you can do some fun things with POV-ray from Python.

Lastly, and just for fun, some wooden eggs (textures textures.inc/Cork, woods.inc T_Wood10 and T_Wood14):

3 comments:

  1. Exciting to see you moving in this direction Carl. Python + POV-Ray is a long time interest of mine as well.

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  2. @Kirby, thanks for the look. I understand POV-ray is good for a lot of 3D mathematical visualizations - right up your alley.

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  3. Hei Carl,.!
    Como instalar povray, no ubuntu12.04? ou ppa direto? grato, espelhodagu@gmail.com, thank you

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