Simulation - Animation

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It would be good to have a standard simulation, where the tool is shown
moving around.
Ideally this should work purely from the "NC Code" object ( a child of
"Program" ), so that it double checks the NC file, without using the
original operations, and also it can be used with old NC files.

Original issue reported on code.google.com by danhe...@gmail.com on 16 Jul 2009 at 8:50

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This should have solid representations of the tools and the holders

Original comment by danhe...@gmail.com on 16 Jul 2009 at 9:16

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Dan,

I don't know if this would be applicable to this issue, but perhaps something 
could 
be learned from the code... Blender (www.blender.com) incorporates a fairly 
sophisticated sculpting tool 
(http://wiki.blender.org/index.php/Doc:Manual/Modelling/Meshes/Sculpting) for 
use 
with its mesh geometry. This is basically an additive/subtractive geometry 
algorithm 
driven by user mouse/stylus input. If this input were changed to be fed by 
G-Code 
and the sculpting shape/mode adjusted to reflect the machine tool, could this 
be 
used to simulate subtractive machining?

Sorry if this is totally unrelated or unusable... I don't know much about 
coding or 
the inner workings of what you're considering. I'd love to see something like 
this 
incorporated, tho.

Cheers,
-Kelly (mzungu)

Original comment by kelly.la...@gmail.com on 28 Jul 2009 at 8:43

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Kelly,

The documentation says
"Add causes the brush to pull an area of the model in the positive direction, 
Sub in
the negative direction."

This just distorts the mesh, I think. What we need is to be able to subtract any
solid from any other solid, where the solids are made from triangles. Is there a
function in Blender to cut one solid from another?

Original comment by danhe...@gmail.com on 29 Jul 2009 at 7:37

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Dan,

There are pretty good boolean functions for meshes in blender: 
http://wiki.blender.org/index.php/Doc:Manual/Modifiers/Mesh/Booleans - 
implemented 
both as a mesh modifier and a separate tool, as I understand it. 

I would guess that these would have to be quite optimized in order to be 
efficient 
for an animated feedback. The thing that pops into my mind is to do the 
subtractions 
by g-code block, rather than on a time-based algorithm. 

Utilizing the modifier stack to do the boolean subtractions would be very 
interesting, as it would allow the "backing up" in time, & etc. But, knowing 
that 
the stack is not designed for this, it may not have the capacity to pull it off.

Again, this may only be useful to you to take a peek at their source code, then 
apply that knowledge to your situation here.

Hope this helps!
-Kelly

Original comment by kelly.la...@gmail.com on 29 Jul 2009 at 2:34

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Dan,

I just recalled another resource that may be of benefit to this project (and 
the 
HeeksCAD one, obviously) in general and to your interest in booleans (CSG) in 
particular: AYAM (http://ayam.sourceforge.net/) is open source under the BSD 
license. There may be some code in there to glimpse.

It also incorporates NURBS functionality, which would totally rock to have in 
HeeksCAD. (For a great implementation of NURBS, have you tried out MoI 
(http://moi3d.com/)? Its written by a former Rhino coder, is cheap, and has 
access 
to the latest beta for download & try, I believe.)

Meh, perhaps for future dev...

Cheers,
-Kelly

Original comment by kelly.la...@gmail.com on 29 Jul 2009 at 3:22

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I stumbled across Ayam the other day when looking at one of the libraries it 
uses.
Ayam uses the OpenCSG library to quickly render the CSG operations. 

http://www.opencsg.org/

Perhaps that help, perhaps it dosen't. 

Original comment by geo01...@gmail.com on 29 Jul 2009 at 4:06

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Oh, I suppose would would also need something like the GTS library to actually 
do the
CSG operations in the first place. 

Original comment by geo01...@gmail.com on 29 Jul 2009 at 4:08

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I think the first thing to look at would be GTS, as it is likely to be the most
simple and so I can hope that it might be fast.
It looks like Ayam is NURBS based, so it won't be optimized for fast booleans 
with
triangle models.

This conversation should be in issue 132 ( Simulation - Solid )
http://code.google.com/p/heekscnc/issues/detail?id=132

Original comment by danhe...@gmail.com on 29 Jul 2009 at 6:59

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no new features, just bug reports in this issue list

Original comment by danhe...@gmail.com on 24 Mar 2014 at 3:35

• Changed state: WontFix