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Author Topic: Voxel image stack and then what?  (Read 40812 times)
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slon_ru
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« Reply #135 on: July 12, 2012, 10:02:36 PM »

Hi!
Press "import parameter from main".
Try with default fractal.
br
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jpuget
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« Reply #136 on: April 29, 2015, 03:53:05 PM »

hello fractalists!

I have been trying to export a 3d fractal from MD3d to obj, using voxel stack,  Fiji and Meshlab following the instructions of Don Whiteaker and also the one made by Nic022. The problem is that when I open the xxx.pnm.obj only grey points appear, there is no mesh at all. Does anyone know what kind of problem might be?

I copy here my parameters just in case. It is very basic, but I would like to have something similar printed.

Mandelbulb3Dv18{
g.....Y/...g2...g2...26....GCJvysRf3.HoMiVB7HL3EhpM6m7p.XwPQObvQGBk6zKcf3AWXpQzj
................................XCUAP2KGiz1........Y./..................y.2...wD
...Uz6....k4..../MU0/......U0...48....E3.....6uKtdT.MQpD/..........m/dkpXm1.OaNa
z.UaNadD12..0..........wz.................................U0.....y1...sD...../..
.z1...kDzkKWs5.4Lx1..........0yVA4S5f9cj4c5VVNjziqvDgZ6y/UlJzQfEqzR5f9cjx8YxTrlu
0uns5mMsRgiUyUBTNOT.MQpDU.....2V/.............sD.6....sD..G.0...................
.............oAnAt1...sD....z...........................................n0...k1.
.....Ksulz1.....W.kz.wzzz1.U..6.P....w/...EB....m....c3...UK....2....I1...k3SN52
...U.avrazDjTCszzzzzzzzzz16.1c..zzzz............6wyBIC4OWz1...........Y/8..GciB.
.wUmc2beYz1.dA8E5Exwz0........../EU0.wzzz1...........s/...................E.2c..
zzzz.............0...................2./8.kzzzD............8....................
/EU0.wzzz1....................................Ak.1.k.1Ak87kzzzD.gLzzzDu5Z.1h....
U0Ok/xzzz1kzmzzzlo49ZtD.4kHitGMR0p2n.A0bQmdlsxTzy1.sVvjzPfrztnD.45xyvjrSz1Dy.Mhr
yvjyzxTzy1UQOejy........H8.zIV8Yq91zw1.shL5z.kzN................................
E....6E.F2E.....I....g....EHZtqNZ75Gt/LNm/UQ....................................
..U................0./........zD........kz1........sz........6.k................
.....QGA6k85OFxDuvbOwGrYcyHnAnAnAnAvz.........zD................................
.....................2.....3....8....YoMjBLMcJ4NmxaP7NoI........................
.....MU/4MU/4........QaNaNaNatxDMTmmCfe3VzXaNaNaNaNyz6nAnAnAngxD.......Un.2.....
..CA.1.......szj........Z.2.......yD./.......6.k................................
................................}
{Titel: MENGERHYPERPLUSICO 8E}



Thank you very much once again.
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bib
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« Reply #137 on: April 29, 2015, 04:22:59 PM »

Hi,

The params are not very useful because apparently the problem is in Fiji, so some screenshots would be helpful. Anyway, when you export to OBJ, try Threshold = 0 and Resampling factor = 1
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Between order and disorder reigns a delicious moment. (Paul ValÚry)
jpuget
Alien
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Posts: 22


« Reply #138 on: April 29, 2015, 04:58:47 PM »

Ok, thanks. I get now something better, but still a bad result.

I used 600 pngs , should I used 1000 to get a more accurate result? or what kind of parameters should I improve?


* Picture 2015-04-29 16_50_09.jpg (199.59 KB, 1000x746 - viewed 211 times.)
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bib
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« Reply #139 on: April 29, 2015, 05:29:10 PM »

You can always make it more accurate, but remember to take into account the maximum number of faces the printer can accept. 600 PNG is good. I use between 500 and 1000. At Shapeways the max number of faces is 1 million, and here you are already at 1.8 million. You will have to use the decimation filter in Meshlab to reduce number of faces (tutorials available on Shapeways site)
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Between order and disorder reigns a delicious moment. (Paul ValÚry)
jpuget
Alien
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Posts: 22


« Reply #140 on: April 30, 2015, 09:01:25 AM »

Then I imagine that it is going to be impossible to print something like this, isnt it?

Thank you


* MENGERHYPERPLUSICO 11.jpg (160.99 KB, 1066x800 - viewed 227 times.)
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bib
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« Reply #141 on: April 30, 2015, 09:10:59 AM »

Try and tell us!
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Between order and disorder reigns a delicious moment. (Paul ValÚry)
jpuget
Alien
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Posts: 22


« Reply #142 on: April 30, 2015, 09:21:19 AM »

I tell you now, for me it is not possible. This is the better I can get


* Picture 2015-04-30 09_03_32.jpg (174.46 KB, 1368x1115 - viewed 226 times.)
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Mrz00m
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Posts: 204


« Reply #143 on: January 03, 2017, 08:33:32 PM »

Is the best recommended program for this still Fiji?

Can you upload your cool meshes to a mesh sharing site like thingiversse or CGtrader?

Fiji probably doesn't throw empty marching cubes from memory, so it probably uses 100X or 1000X more memory than necessary. pure black and white cubes can nomrally be thrown out.

Fiji doesnt search where the actual edges and therefore vertices are on the B/W limit of the images. We should at least blur the image, or better still rewrite a MC which measures at least from 1/10 where on each edge of a cube the vertex should be because, once it sees one side is black and one is white, it probably assumes 0.5 for every vertex postion which is very low quality marching cubes.

I was thinking of writing a special mesh generator in Unity3D, which can process the PNG's on the fly and then discard them, and which can do optimized MC, and preferably even another mesh generation sequence than MC that is higher quality. is low quality.

It's cool that we can at least theoretically throw out 99 percent of the image from memory that doesnt contain a BW limit and that we can get 10 times better vertex precision if we tell the MC edges to check where the BW limit is found on them.

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