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View mystlfile-openscad-import.stl
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@jstults
jstults / solution_30.stl
Created Jan 24, 2019
inverse csg of openlsto example 3d cantilever
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@jstults
jstults / ransac.conf
Created Jan 24, 2019
configuration file for InverseCSG RANSAC algorithm
View ransac.conf
target_sample_num: 50000
cluster_epsilon: 0.1
epsilon: 0.1
min_points: 500
normal_threshold: 0.8
probability: 0.5
max_iter: 100
max_diam: 0.1
gc_max_iter: 10
base: 5.0
@jstults
jstults / topopt2CSG.py
Created Jan 24, 2019
python script to run InverseCSG on an example part from OpenLSTO based on the run_tests script that ships with InverseCSG
View topopt2CSG.py
import os
import sys
# Usage: python3 topopt2CSG.py <build_dir> <test_name>
# Example:
# python3 topopt2CSG.py ../build openlsto
#
if len(sys.argv) < 3:
print('Error: please specify the test case name.')
@jstults
jstults / pure-bending.tpd
Last active Dec 16, 2017
Pure bending ToPy problem definition
View pure-bending.tpd
[ToPy Problem Definition File v2007]
# Author: Josh Stults
# pure bending topology optimization on a 640x720 domain
PROB_TYPE : comp
PROB_NAME : pure-bend
ETA : exp
DOF_PN : 2
VOL_FRAC : 0.3
@jstults
jstults / solidvoid.py
Created Dec 7, 2013
script to process 1-bit pngs that define solid and void regions for ToPy topology optimization problems
View solidvoid.py
# read in black & white pngs and create PASV_ELEM and ACTV_ELEM lists
# for topy input decks
#
# void.png: black pixels indicate regions that should be void
# solid.png: black pixels indicate regions that should be solid
#
from PIL import Image
solidim = Image.open("solid.png")
voidim = Image.open("void.png")
@jstults
jstults / framev.tpd
Created Dec 7, 2013
ToPy Problem Definition (tpd) for topology optimization of a Prusa Mendel frame vertex Based on this one: http://www.thingiverse.com/thing:5094/
View framev.tpd
[ToPy Problem Definition File v2007]
#
# Author: Joshua Stults
# a 2d cross-section for a Prusa Mendal RepRap frame vertex
#
PROB_TYPE : comp
PROB_NAME : framev
ETA : 0.5 # reciprocal approx.
DOF_PN : 2
@jstults
jstults / octet_truss.py
Created Jun 25, 2013
octet truss cubes with two levels of hierarchical organization to improve the speed of the union operation
View octet_truss.py
import scipy as sp
import itertools as it
class rcc_shape():
def __init__(self, name, origin, height, radius):
self.name = name
self.origin = origin
self.height = height
self.radius = radius
def mged_string(self):
@jstults
jstults / ofat.R
Created Feb 2, 2013
why one-factor-at-a-time testing is a bad idea
View ofat.R
#
# why one-factor-at-a-time testing is a bad idea
# http://www.variousconsequences.com/2013/02/no-interactions-ofat-is-still-bad-idea.html
#
library(AlgDesign)
library(xtable)
# full factorial of 6 factors at 2 levels:
fullfac = gen.factorial(levels=c(2,2,2,2,2,2), center=TRUE)
# D-optimal fraction, 32 runs:
dx.1 = optFederov(~(X1+X2+X3+X4+X5+X6)^2, data=fullfac, nTrials=32, nullify=2, maxIteration=64, nRepeats=200)
@jstults
jstults / multi_scatter.R
Created Jan 21, 2013
example of small multiple scatter plots and marginal densities in R
View multi_scatter.R
ninputs = 3 # across the columns
noutputs = 2 # down the rows
iin = c(1,2,3) # indices for the inputs
jout = c(4,5) # indices for the ouputs
# example data frame:
npoints = 2**14
data.set = data.frame(X1=rnorm(npoints), X2=rnorm(npoints), X3=rnorm(npoints))
data.set = transform(data.set, X4=X1*X2+0.1*X3**2, X5=2*X2+X1+0.1*X3**2)
# the width/height are set by \showthe\columnwidth \textheight in latex
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