Volume calculation
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 From:  Ronamodeler (RON_A)
3746.13 
Download the evaluation version of Rhino. It has a built-in volume analysis tool; which should not be affected by the time limits.
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 From:  shayno
3746.14 
Minimagics 2.0 by materialise is an stl checker that will give the volume and is free.
cheers
shayne
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 From:  Max Smirnov (SMIRNOV)
3746.15 
I think there is no need to write a script for exact calculation of volume.
99% accuracy should be enough. I can write such a script very easily.
I have checked two methods today, but I found that some moi functions doesn't work as I need.


Here is the issues:
1. Boolean Isect doesn't work with solid and line.
2. Curve Isect generates many wrong points of intersections in some cases.

The last way which I can use is Trim function.. I'll check it.
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 From:  Michael Gibson
3746.16 In reply to 3746.15 
Hi Max,

> 1. Boolean Isect doesn't work with solid and line.

It seems to work over here but probably does not do what you need - the way the booleans work with curves interacting with solids is that the curve is extruded out into a surface and then it's that extrusion that interacts with the original solid.


> 2. Curve Isect generates many wrong points of intersections in some cases.

Can you post a 3DM file? I tried a box with diagonal line like you've got there and I got 2 points.

- Michael
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 From:  Max Smirnov (SMIRNOV)
3746.17 In reply to 3746.16 
Hi Michael,

the file attached to my previous message. Curve Isect generates 14 points.
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 From:  Michael Gibson
3746.18 In reply to 3746.17 
Hi Max, sorry I must have missed the attachment.

I'm not sure why there is no result from boolean intersection there, but even if it did work it would work as it does in the attached version.


re: 14 points - sorry I didn't notice there were so many points stacked up when I tried it. It's likely to be coming from multiple pieces of the solid's topology all intersecting the line there, probably results from 3 faces, 3 edges and 1 vertex all intersecting the line right there. The geometry library function that is being called for the intersection seems to return all those results and that's what gets generated currently. In v4 I should be able to filter results like that to weed out duplicates.

- Michael
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 From:  Metin Seven (SEVENSHEAVEN)
3746.19 
Volume calculation in MoI would be great. I create a lot of stuff for 3D printing, and now have to export a mesh to Blender 3D first, to measure its volume using the 3D Print Toolkit add-on.

———————

metinseven.com — 3D (print) modeling • animation • artwork • design • illustration • visualization

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