topic Re: Detach script with c ++ in 3ds Max Programming Forum

Detach script with c ++

anycganycgJ8A6A — Tue, 16 Aug 2022 04:25:32 GMT

Nice to meet you

I have a problem

I have a 5000 object

That is attached..

I would like to detach with elements

I tested many detahel script

But all is failed or max freezz problem

So i found this link

C++ detach script

https://forums.cgsociety.org/t/c-detach-by-elements/1707338

If i use c++ , can i detach my objects

I dont know c++

Uf that is possible , can you help that ?

Re: Detach script with c ++

denisT.MaxDoctor — Tue, 16 Aug 2022 05:34:29 GMT

Since I am the actual author of this code, it will probably be easier for me to answer you.
If you don't know c++, then this code won't help you. It's impossible to just take it and somehow execute it in 3DS MAX.
Only the MaxScript solution will suit you and nothing else. If you couldn't find a working script, it doesn't mean that it doesn't exist. You just haven't come across any good ones.

The easiest way to get a working solution is to post an example of a max scene (MAX 2020 version), and clearly tell which object and how should be detached by element...

Actually, there are two technical problems here (not one):
1. find all the necessary elements
2. detach them

So, we need to take a look first

Re: Detach script with c ++

anycganycgJ8A6A — Tue, 16 Aug 2022 09:55:49 GMT

really thank you for reply

https://drive.google.com/file/d/1eJQo2kvwSnBHH94Z6d2WtJbIgfebCic7/view?usp=sharing
that is attached object
i am sorry
pls can you detach test ?
i would like to know detach speed with c++ script
my pupose is element detach.
thank you again ~

Re: Detach script with c ++

denisT.MaxDoctor — Tue, 16 Aug 2022 17:25:27 GMT

It should be noted that the task is not easy for c++ either.
Just so you know, your example does not have 5000 elements as you said, but 50000(!)... and that's a big difference.
So far, I can't solve this problem with a pure maxscript, but it's a challenge for me, and I'm interested in solving this problem anyway

Re: Detach script with c ++

anycganycgJ8A6A — Wed, 17 Aug 2022 02:22:41 GMT

Really really thank you for your effort
I wish you can do that ~
At any way thank you

Re: Detach script with c ++

denisT.MaxDoctor — Wed, 17 Aug 2022 02:36:32 GMT

@anycganycgJ8A6A wrote:

pls can you detach test ?
i would like to know detach speed

how fast does it have to be to make you happy? 😉

Re: Detach script with c ++

anycganycgJ8A6A — Wed, 17 Aug 2022 03:14:49 GMT

Thank you for your kindness
As fast as possbile.
5 seond is very happy
10 second is very happy also
Really Sorry for rude request :

Re: Detach script with c ++

denisT.MaxDoctor — Wed, 17 Aug 2022 05:51:42 GMT

@anycganycgJ8A6A wrote:
As fast as possbile.
5 seond is very happy
10 second is very happy also

Ha ha ha... you're naive. While we can talk about 3-5 minutes

Re: Detach script with c ++

anycganycgJ8A6A — Wed, 17 Aug 2022 07:26:06 GMT

i adore you
I always think of your word as the word of God
Even if I become a stone, I will wait for your answer

Re: Detach script with c ++

denisT.MaxDoctor — Wed, 17 Aug 2022 16:16:29 GMT

I'm just wondering... why attach all the objects to one mesh first and then detach them piece by piece again?

It turns out 50,000 objects ... it is simply impossible to work with such a number!

you imagine detaching all in 3-5 seconds...
let's do a simple experiment, just try to create 50,000 comparable by size box objects:

( delete objects t0 = timestamp() h0 = heapfree bb = for k=1 to 50000 collect ( b = box lengthsegs:2 widthsegs:2 heightsegs:2 pos:(random -[1000,1000,1000] [1000,1000,1000]) converttomesh b ) format "count:% time:% heap:%\n" bb.count (timestamp() - t0) (h0 - heapfree) )

how long does it take on your machine?

Re: Detach script with c ++

anycganycgJ8A6A — Wed, 17 Aug 2022 16:52:50 GMT

really thank you for reply again
first of all, i tested
count:50000 time:17770 heap:49620672L

Please understand my poor English skills

Here's why it's made with one mesh:

I often get attached large objects from clients.
So I have to separate for mapping.

So this time
I have a curiosity that I want to solve

My curiosity won't stop

Re: Detach script with c ++

anycganycgJ8A6A — Wed, 17 Aug 2022 17:00:39 GMT

second : count:50000 time:11445 heap:49893368L
third : count:50000 time:11601 heap:49891960L

denist , i have a question
without opening max program , Is it impossible to run a script from the command line?

Re: Detach script with c ++

denisT.MaxDoctor — Wed, 17 Aug 2022 17:36:45 GMT

@anycganycgJ8A6A wrote:
I often get attached large objects from clients.
So I have to separate for mapping.

In this case, you do not need to detach all the parts. Detach only those you need to work on at the moment and reattach them when the job is done.
It also makes sense to specifically do the mapping for only certain parts, and copy the mapping from them to the same or similar ones. This will save you a lot of time.

Re: Detach script with c ++

denisT.MaxDoctor — Wed, 17 Aug 2022 17:46:17 GMT

@anycganycgJ8A6A wrote:
without opening max program , Is it impossible to run a script from the command line?

in general, consider that it is impossible. Expect MAX must be opened to run tools...

The "hidden UI" option (launching MAX without a UI) is designed and used almost exclusively for rendering purposes. Running MAX with command line is not an area in which my expert opinion means something. Surely there are more experienced people in this topic

Re: Detach script with c ++

anycganycgJ8A6A — Wed, 17 Aug 2022 17:54:09 GMT

Really Thank you for good advice
I have many style in my work

1. Detach all , and replace that
2. Other complex attached scene , extract model

Etc...

Files from clients have a lot of different styles.
I felt it was convenient to work after just detaching the whole thing.

Re: Detach script with c ++

denisT.MaxDoctor — Wed, 17 Aug 2022 18:41:20 GMT

try this:

try(destroydialog TakeApartRol) catch() rollout TakeApartRol "Take Apart" width:191 ( fn getAllMeshElements node faces: detach:on pb: ni: gi: ti: mi: gc_count:0 = ( prefix = node.name + "_" local tmesh = snapshotasmesh node --local amesh = copy tmesh local num_groups = 0 local num_elements = 0 local elements = #() local _detachfaces = meshop.detachfaces local _deletefaces = meshop.deletefaces local t0 = timestamp() local numverts = tmesh.numverts local numfaces = tmesh.numfaces local allfaces = #{1..numfaces} local verts = for v = 1 to numverts collect #() for j in allfaces do ( f = getface tmesh j for k = 1 to 3 do append verts[f[k]] j ) out = false local element = #() if faces == unsupplied do faces = allfaces for i in faces while not keyboard.escPressed do ( element = #(i) for j in element where faces[j] do ( faces[j] = false f = getface tmesh j for k = 1 to 3 where verts[f[k]] != undefined do ( join element verts[f[k]] verts[f[k]] = undefined ) ) if detach then ( join elements element ) else ( append elements (element as bitarray) ) num_elements += 1 if pb != undefined do pb.value = mod (num_elements/10.0) 100 if ni != undefined do ni.text = num_elements as string if gc_count and (mod num_elements gc_count == 0 or i == numfaces) do ( --gc light:on if detach do ( m = _detachfaces tmesh elements delete:false asmesh:true name = uniquename prefix n = editable_mesh name:name parent:node n.mesh = m elements = #() ) num_groups += 1 if gi != undefined do gi.text = num_groups as string if ti != undefined do ti.text = ((timestamp() - t0) / 1000) as string local val = int (100.0 * heapFree / heapSize + 0.5) if mi != undefined do mi.text = val as string windows.processPostedMessages() ) out = true ) num_elements elements ) label facetype_lb "Face Targets: " align:#right offset:[0,4] across:2 radiobuttons facetype_rb labels:#("All", "Selected") columns:1 align:#left offset:[0,3] label bycount_lb "Group By Count: " align:#right offset:[0,4] across:2 radiobuttons bycount_rb labels:#("1", "10", "100", "1000", "10000") default:1 columns:1 align:#left offset:[0,3] checkbox detach_ch "Detach" align:#left offset:[0,0] --across:2 button mxs_detach_bt "MXS Process" width:172 align:#left offset:[-4,2] progressbar progress_pb color:orange width:172 height:10 align:#center offset:[0,0] group "Statistics: " ( label number_lb "All Elements" align:#left offset:[8,0] across:3 label info_01 "0" align:#right offset:[40,0] label data_01 "" width:20 align:#right offset:[8,0] label groups_lb "Groups By Count" align:#left offset:[8,0] across:3 label info_02 "0" align:#right offset:[40,0] label data_02 "" width:20 align:#right offset:[8,0] label time_lb "Time" align:#left offset:[8,0] across:3 label info_03 "0" align:#right offset:[40,0] label data_03 "s" width:20 align:#right offset:[8,0] label heap_lb "Memory" align:#left offset:[8,0] across:3 label info_04 "0" align:#right offset:[40,0] label data_04 "%" width:20 align:#right offset:[8,0] ) group "Settings and Debug: " ( checkbox debugh_ch "Debug" align:#left offset:[0,4] across:2 checkbox gclight_ch " GC Light" align:#left offset:[20,4] button gc_bt "Garbage Collection" width:172 align:#left offset:[-4,2] ) fn memoryDisplay = ( local val = 100.0*heapFree/heapSize + 0.5 info_04.text = (int val) as string ) on gc_bt pressed do ( gc light:gclight_ch.state memoryDisplay() completeRedraw() ) local num local t0, t1 local h0, h1 on mxs_detach_bt pressed do undo "Detach" off, with redraw off ( node = selection[1] if iskindof node GeometryClass do ( gc light:on memoryDisplay() t0 = timestamp() h0 = heapfree mesh = gettempmesh node faces = if facetype_rb.state == 1 then #{1..mesh.numfaces} else (mesh.selectedfaces as bitarray) count = #(1,10,100,1000,10000)[bycount_rb.state] global _ee = GetAllMeshElements node faces:faces detach:detach_ch.state \ pb:progress_pb ni:info_01 gi:info_02 ti:info_03 mi:info_04 gc_count:count t1 = timestamp() h1 = heapfree format "count:% time:% heap:%\n" _ee.count (t1 - t0) (h0 - h1) ) ) on TakeApartRol open do ( gc light:on memoryDisplay() ) ) createdialog TakeApartRol

Re: Detach script with c ++

denisT.MaxDoctor — Wed, 17 Aug 2022 18:45:26 GMT

you have a pretty fast machine, so the script might not be too slow for you

Re: Detach script with c ++

anycganycgJ8A6A — Wed, 17 Aug 2022 19:29:28 GMT

I fell asleep and woke up .
You gave me something big like Santa Claus.
thank you thank you thank you
I'll test it tomorrow after I get some sleep.
thank you so much.

Re: Detach script with c ++

Serejah — Wed, 17 Aug 2022 20:00:13 GMT

Removing frequent stats updates and unrolling 1..3 loops made it noticebly faster from 5.856sec to 4.176sec. But I'm not sure if it depends on a test scene. I used a few dozens of teapots collapsed together.

Re: Detach script with c ++

denisT.MaxDoctor — Wed, 17 Aug 2022 20:44:37 GMT

I'm pretty sure you're right... there are a few traces, mostly for debugging and analysis, and they should be removed in the final version.