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LordOfTheBytes

Member Since 08 Oct 2012
Offline Last Active Oct 19 2012 10:40 AM

Topics I've Started

[Open source project] Voxel based mesh generator

08 October 2012 - 10:08 AM

Hi,
I want to introduce a new open source tool and I hope that this is the right forum. vBaum is a voxel based generator for procedural geometry. vBaum stands for "voxel-Baum", which means "voxel-tree" in english. This primaly relates to the underlying data structure, but we also plan to generate tree meshes with it later. The core algorithms are written in C++ for maximum performance. It supports various geometric figures, noise, splines, boolean operations, extrusion and more. The created geometry can be exported in the .obj and .stl file formats using the marching cubes algorithm and smoothing. A python interface is provided that enables users to quickly construct arbitrary geometry. Let me give an example:
Posted Image
This was created with vBaum (notice the self intersection) and rendered in Ogre. It was created with the following python script:
#!/bin/python
from vBaum import *
from math import *
scale = 5
splinePoints = [Vector3(0,5,0)*scale,
Vector3(3,4,20)*scale,
Vector3(10,5,25)*scale,
Vector3(20,15,15)*scale,
Vector3(25,15,0)*scale,
Vector3(5,5,0)*scale,
Vector3(-10,-10,5)*scale,
Vector3(-10,25,10)*scale,
Vector3(20,-5,10)*scale,
Vector3(16,5,-10)*scale]

spline = Spline(splinePoints, True)  #create a closed spline from the points
knot = spline.extrude(Sphere(20)) #this will thicken the spline, creating a torus knot
knot.exportAsObj("knot", 50) #file will be names knot.obj and a smooth with 50 iterations will be applied
The next example is a bit more complex but the python script still has less than 80 lines. The mesh was rendered with Blender:
Posted Image
The next example shows that vBaum can also be used to generate less abstract objects. It was rendered using Ogre:
Posted Image
Posted Image

Usage: For windows 64 bit users we provide a precompiled binary along with some example scripts, in this case you only need python 3 to get started. If you want to build vBaum from source you need boost (because of boost::python) and the corresponding python version. vBaum was developed, compiled and tested under both windows and linux. Side note: The C++ implementation was developed by me and a friend in only one week of coding fun, so you will not find many commentaries. Posted Image You can find some background information here. If you create something cool using vBaum please post some screenshots!
Known issues:
  • Spline creation sometimes leads to an endless loop. However this problem occured rarely, we are looking into it. Our provided example scripts should run fine.
  • Memory consumption: Creating large geometry can lead to memory and performance problems. We spent a lot of time optimising it, but it is still not perfect.

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