I’m looking for help in writing a blender readable voxel or point cache file. I’ve looked at the generated .bphys files, and I’ve read this website .
I can deal with converting the raw data (from an excel file) into the blender readable format, but I really need to see an example of the formatting or syntax of a voxel or point cache file.
I assume you can write these files in a text editor and open them using the “external” cache option. Is there more to it? 
Thanks.
Moved from “General Forums > Blender and CG Discussions” to “Coding > Python Support”
I found this script for writing a blender voxel file but it doesn’t work. Any ideas?
#! /usr/bin/env python
import sys, os
from struct import *
def main():
if len(sys.argv) < 2:
print(“Usage: " + sys.argv[0] + " <file>”);
return
SOURCE = sys.argv[1]
if not os.path.exists(SOURCE):
print("Can't find source file " + SOURCE)
return
source = open(SOURCE, "r")
destination = open('./voxels.bvox', "wb")
lines = source.readlines()
X, Y, Z = lines[0].split(' ')
destination.write(pack('i', int(X)))
destination.write(pack('i', int(Y)))
destination.write(pack('i', int(Z)))
destination.write(pack('i', int(50))) # 1 frame
for value in lines[1].split(" "):
if value != '
':
destination.write(pack(‘f’, float(value)))
destination.close()
source.close()
print("Success.")
main()
In Python indentation is very important. Could you copy/paste the script within
tags to keep indentation and formatting correct?Note: The instructions say open command prompt, navigate to directory containing this python and a .txt containing the data to be converted, type: >bvox.py data.txt
import sys, os
from struct import *
def main():
if len(sys.argv) < 2:
print(“Usage: " + sys.argv[0] + " <file>”);
return
SOURCE = sys.argv[1]
if not os.path.exists(SOURCE):
print("Can't find source file " + SOURCE)
return
source = open(SOURCE, "r")
destination = open('./voxels.bvox', "wb")
lines = source.readlines()
X, Y, Z = lines[0].split(' ')
destination.write(pack('i', int(X)))
destination.write(pack('i', int(Y)))
destination.write(pack('i', int(Z)))
destination.write(pack('i', int(50))) # 1 frame
for value in lines[1].split(" "):
if value != '
':
destination.write(pack(‘f’, float(value)))
destination.close()
source.close()
print("Success.")
main()
#! /usr/bin/env python
# Writes a Blender Voxel accepting this format:
# ----------------------------
# X Y Z
# data data data data data
# ----------------------------
# Where X Y Z are the dimentions (separated by spaces)
# data is a float between 0.0 and 1.0
#
# Data is read by Blender in this manner:
# Z * resY * resX + Y * resX + X
#
# So write your data line like this for a 3 x 3 voxel box:
# (0, 0, 0) (1, 0, 0) (2, 0, 0)
# (0, 1, 0) (1, 1, 0) (2, 1, 0)
# (0, 2, 0) (1, 2, 0) (2, 2, 0)
#
# (0, 0, 1) (1, 0, 1) (2, 0, 1)
# (0, 1, 1) (1, 1, 1) (2, 1, 1)
# (0, 2, 1) (1, 2, 1) (2, 2, 1)
#
# (0, 0, 2) (1, 0, 2) (2, 0, 2)
# (0, 1, 2) (1, 1, 2) (2, 1, 2)
# (0, 2, 2) (1, 2, 2) (2, 2, 2)
#
# Remember to write these all on 1 line in a constant row
import sys, os
from struct import *
def main():
if len(sys.argv) < 2:
print("Usage: " + sys.argv[0] + " <file>");
return
SOURCE = sys.argv[1]
if not os.path.exists(SOURCE):
print("Can't find source file " + SOURCE)
return
source = open(SOURCE, "r")
destination = open('./voxels.bvox', "wb")
lines = source.readlines()
X, Y, Z = lines[0].split(' ')
destination.write(pack('i', int(X)))
destination.write(pack('i', int(Y)))
destination.write(pack('i', int(Z)))
destination.write(pack('i', int(50))) # 1 frame
for value in lines[1].split(" "):
if value != '
':
destination.write(pack('f', float(value)))
destination.close()
source.close()
print("Success.")
main()
I’m basically starting from the bottom with intro to python tutorials. Anyway, using Eclipse with PyDev installed I get the following error when running this script:
“Unused in wild import: Struct, calcsize, error, pack_into, unpack, unpack_from - location: Line 29.”
So, it doesn’t like "from struct import * "
That’s all I got.