Processing 1.0 - Processing Discourse - OBJ Export library released

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Index › Processing Development › Libraries, Tool Development › OBJ Export library released

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OBJ Export library released (Read 4104 times)

nervoussystem

OBJ Export library released
May 3^rd, 2009, 4:07pm

I've released an OBJ export library that works in the same manner as the PDF and DXF libraries. You can find it at:

n-e-r-v-o-u-s.com/tools/obj.php

I wanted to make a library to export 3D data that would not be triangulated, and you wouldn't have to reset camera() to have your units export correctly.

It's still in beta. I plan to add support for multiple groups as well as lines, though it seems many programs do not support the standard for lines in objs.

Jesse Louis-Rosenberg
Nervous System

Cedric God Member Offline Posts: 1838	Re: OBJ Export library released Reply #1 - May 6^th, 2009, 4:27pm Thanks, thats great. I guess ill give it a try Btw, 3 days ago i discovered your work at the processing flickr pool. I really like your work! Keep it up!
	twitter.com/CedricKiefer

gll

Re: OBJ Export library released
Reply #2 - May 27^th, 2009, 2:02pm

Hello Jesse,

Thank you for the posting this. It's true, it's better when you have unbroken polygons instead of a scene full of triangles. I did a library for .OBJ exports based on beginRaw() exporter (which is triangles only). It works for various 3D formats. http://labelle.spacekit.ca/supercad/ (rhino-povray-autocad-sketchup).

Since superCAD is only intended for low-level exports, I felt that for things like groups, layers and more complex objects, it was important to create a better DataStructure first. This is what the library http://anar.ch is for. The lib let you exports unbroken polygons, curves and solids into various formats.

For example, you might have box() or sphere() exported into a solid object (CSG-AXIS solid). We keep adding elements; Rhino's Curves (CSplines) are preserved when exported for example.

I'm currently writting a P5-->ANAR recorder to make the things even more easier. It's based on beginRecord() instead of beginRaw() and should be ready soon.

LaBelle / ANAR.ch / LaBelle.spaceKIT.ca

DieTapete

Re: OBJ Export library released
Reply #3 - Feb 10^th, 2010, 9:25am

Hi,

I know this thread was posted a while ago.. but I'm having trouble with the library. I get an ArrayIndexOutOfBounds Exception regarding the "vertices" Array, when I want to export rather large OBJ-Files.
It's in this line: float vertex[] = vertices[vertexCount]; in the vertex(x,y,z) function. The index is at 512 when it stops.

I wanted to fix it by initializing the vertices Array with a higher value, but I couldt find the declaration of the array anywhere...

Would be great if anyone can help me with this..

Alessio Erioli

Re: OBJ Export library released
Reply #4 - Apr 27^th, 2010, 10:43am

Hi,

I know this is quite an old discussion, but I hope someone might still be checking it (Jessica maybe?) and help me with this: I downloaded the cellcycle applet to give it a try on my computer. I also downloaded and correctly (or at least so it seems) installed the required libraries. Still, I get this error message:

Cannot find a class or type named "Face"

referring to line 44:

Face faces[] = new Face[0];

Any suggestions?

Thank you very much in advance.

Alessio

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