pack3d
Dev tools
3d print packing optimizer
SHOW HN2017
260points
45comments
#96of 2,242 in 2017
Top 5%of 2017 by points
How HN took it
LovedMost comments that take a side are positive
7 positive, 14 neutral or asking, 0 mixed, 1 critical, out of 22 comments about the project. Thread score +0.22.
Design: 2 for, 0 againstIdea: 1 for, 0 againstPerformance: 0 for, 1 againstPricing: 1 for, 0 against
The thread, comment by comment
Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.
positive neutral or mixed critical about another commenter or something else the maker
What HN said
What people liked
Great visuals and write-up
From 3 comments
I came here for the visuals and the visual explanation and OP delivered. Disclaimer: OP is a friend of mine.
obeid on HN>Note that pack3d runs until stopped, writing its output to disk whenever a new best is found. I wish more software operated like this. It makes it convenient because your…
vortico on HNLove the visualizations and the explanations Question: Is this more of an unbounded multi-dimensional knapsack problem? With bin packing, you have multiple bins and you're…
daenz on HN
Objections
Ignores thermal constraints of SLS builds
From 2 comments
Very cool! This is a bit of a naive optimization, though. Thermal properties have to be considered when planning SLS builds. Very dense cross sections will result in long laser…
2dollars27cents on HNAlso there are constraints with regards to specific part orientations in the build chamber and angles of specific parts of a print
fudged71 on HN
Requests
Support orientation constraints for SLA printers
From 1 comment
Could this be optimized for the SLA Form2? I.e. No flat sides oriented horizontal?
worldburger on HN
Non-90-degree rotations for shapes like wedges
From 1 comment
> So I precompute all possible rotations of the BVHs (24 rotations) It only does 90° rotations? Wouldn't some shapes (e.g. wedges) benefit from other angles?
the8472 on HN
Questions
Is this a knapsack or bin packing problem
From 1 comment
Love the visualizations and the explanations Question: Is this more of an unbounded multi-dimensional knapsack problem? With bin packing, you have multiple bins and you're…
daenz on HN
Does it increase printer throughput
From 1 comment
While packing problems are pretty cool in general, I'm afraid I don't understand why this is useful for 3D printing. Does this increase printer throughput?
slavik81 on HN
Alternatives named
SVGnest for 2D nesting
From 1 comment
Thanks! Have you seen this? http://svgnest.com/
fogleman on HN
Shapeways' Netfabb-based packing
From 1 comment
My understanding is Shapeways uses an advanced/custom version of Netfabb for their 3D packing. Yes they have some insane optimizations/automation already, and I believe they also…
fudged71 on HN