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rapid prototyping (Read 624 times)
scn
rapid prototyping
Mar 10th, 2009, 8:08am  
Hi
I want to create a 3d object that will be affected my inputs from the arduino. I then would want to export the generated 3d object into a 3d program to be able to rapid prototype it. is it possible to export it in any way? if so, to what 3d program?

thanks for the help
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Angelo
Re: rapid prototyping
Reply #1 - Mar 10th, 2009, 8:54am  
I think an easy format to export to is .obj, and it's a widely supported format among 3d modeling applications.

From what I know about rapid prototyping, you might need to import the .obj into AutoCAD or some CAD software.
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scn
Re: rapid prototyping
Reply #2 - Mar 11th, 2009, 6:00pm  
Thank you very much. Would I have to use a certain library to export an .obj file? I clearly have no idea what I am doing...
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Angelo
Re: rapid prototyping
Reply #3 - Mar 15th, 2009, 12:40pm  
It should be relatively easy for you to export to .obj format without a library.

To make a basic .obj file, output each of your vertices in the form: v X Y Z
After outputting all of your vertices to the file,
for each face output a line in the form:
f vert1 vert2 vert3 etc.

The example below is a cube exported from blender to the .obj format:
Code:

# Blender3D v248 OBJ File: 
# www.blender3d.org
mtllib cube.mtl
v 1.472368 3.441291 1.752435
v 1.472368 3.441291 3.752434
v -0.527632 3.441291 3.752434
v -0.527631 3.441291 1.752434
v 1.472369 5.441291 1.752435
v 1.472368 5.441291 3.752435
v -0.527632 5.441291 3.752434
v -0.527632 5.441291 1.752434
usemtl Material
s off
f 1 2 3 4
f 5 8 7 6
f 1 5 6 2
f 2 6 7 3
f 3 7 8 4
f 5 1 4 8


There's a lot of documentation on the web about this format, if you need a more detailed tutorial.

With that said, I'm sure you can find a library somewhere that handles .obj.
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