Various enhancements and bug fixes

[richardkchapman]

Added multi-tile support, support for vertical printing, support for printing a "crust" (works for vertical printing) and a few miscellaneous fixes/changes that helped me get my print to work.

[ThatcherC]

Hi Richard,
Those are a ton of changes! I haven't read through all the differences yet,
but tile-crossing is a big step.
I have a few questions on your additions:

1. What is the vertical option? I'm not sure what it does.
2. Is the crust option a certain height added to the bottom of the model?
   If so, you might want to check out the 'newfeatures' branch of the project

• it adds a 'baseHeight' parameter to make printing easier.
• The hole-fixing part looks good, but how does it fair on large void
  regions, like Mt. Everest? I have considered finding or developing an
  algorithm to fix the whole dataset, rather than each model as it is made.
  In the mean time, averaging for holes is a good addition.

I might not merge you changes soon. I currently in a negotiation to partner
with a 3D printing company and I'm not sure how they want to handle extra
contributions yet. I can assure you, though, that I will incorporate them
into the project at some point, probably six weeks at the most.

Thanks a lot for you additions to the project!
Thatcher

On Sat, Dec 13, 2014 at 2:53 PM, Richard Chapman notifications@github.com
wrote:

Added multi-tile support, support for vertical printing, support for
printing a "crust" (works for vertical printing) and a few miscellaneous

fixes/changes that helped me get my print to work.

You can merge this Pull Request by running

git pull https://github.com/richardkchapman/Terrain2STL master

Or view, comment on, or merge it at:

#2
Commit Summary

• Add vertical option
• Add argument parsing
• Better hole fixing
• Added support for spanning lat/long tile boundaries

File Changes

• M elevstl.cpp
  https://github.com/ThatcherC/Terrain2STL/pull/2/files#diff-0 (331)

Patch Links:

• https://github.com/ThatcherC/Terrain2STL/pull/2.patch
• https://github.com/ThatcherC/Terrain2STL/pull/2.diff

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#2.

[richardkchapman]

The crust option makes the thickness of the model constant - i.e. the bottom surface is not flat but instead is a constant distance from the top surface. It makes for an interesting effect (and uses less plastic!).

I have not tried the hole fixing anywhere other than the one area I was trying to print (in the English Lake District). It was good enough to fix up that area, but might not completely fix up other areas. Shouldn't make anything any worse though.

Really the code should be taking an average of the non-void surrounding area of whatever size is necessary to find some non-void data, I think.