topic Re: How do I add each group of selected edges to a separate array? in 3ds Max Programming Forum

How do I add each group of selected edges to a separate array?

ivanchin.ivan — Sun, 05 Dec 2021 16:52:39 GMT

There are selected edges, as in the picture. When the code below is executed, it outputs everything in one array.

output:
# {151, 181, 185, 3985, 3987, 3991}

how to implement a loop to put each group of edges into an array?

output:
# {151, 181, 185}
# {3985, 3987, 3991}

I can't figure it out.
Thank you in advance!

from pymxs import runtime as mxs mxs.clearListener() obj = mxs.getCurrentSelection()[0] edges_data = mxs.polyop.getEdgeSelection(obj) print(edges_data)

Re: How do I add each group of selected edges to a separate array?

ivanchin.ivan — Sun, 05 Dec 2021 16:59:51 GMT

Found a solution

https://help.autodesk.com/view/MAXDEV/2022/ENU/?guid=GUID-9D9CB9CD-5F2C-4AF6-8A55-54D933A8457A

Re: How do I add each group of selected edges to a separate array?

denisT.MaxDoctor — Sun, 05 Dec 2021 19:45:25 GMT

The MXS Help developers sometimes surprise me with some impractical or unprofessional solutions and examples, as showed above .. see for yourself:

delete objects s = plane widthsegs:200 lengthsegs:200 converttopoly s ee = #{} for k=1 to s.edges.count do ee[k] = (random 0 1) == 1 polyop.setedgeselection s ee ( t0 = timestamp() h0 = heapfree getEPolyUnconnectedEdgesSelections s format "time:% heap:%\n" (timestamp() - t0) (h0 - heapfree) )

but you can do the same hundreds of times faster if you know how MAXScript works

Re: How do I add each group of selected edges to a separate array?

ivanchin.ivan — Mon, 06 Dec 2021 05:26:41 GMT

hastily, rewrote in python, then I'll revise the solution

from pymxs import runtime as mxs mxs.clearListener() mxs.execute("fn b2a bitarray = (return bitarray as Array)") obj = mxs.getCurrentSelection()[0] def get_data_edges(): edges_data = mxs.b2a(mxs.polyop.getEdgeSelection(obj)) edges_loop = mxs.Array() current_sel_count = 0 while edges_data.count > 0: mxs.append(edges_loop, mxs.Array()) if edges_loop.count == 1: current_sel_count = 0 else: current_sel_count += 1 mxs.append(edges_loop[current_sel_count], edges_data[0]) mxs.deleteItem(edges_data, 1) cnt = 0 while cnt < edges_loop[current_sel_count].count: current_edge_verts = mxs.b2a(mxs.polyOp.GetVertsUsingEdge(obj, edges_loop[current_sel_count][cnt])) neigbor_edges = mxs.Array() cnt += 1 for vert in current_edge_verts: mxs.join(neigbor_edges, mxs.b2a(mxs.polyOp.GetEdgesUsingVert(obj, vert))) for edge in neigbor_edges: check_in_selection = mxs.findItem(edges_data, edge) if check_in_selection > 0: mxs.deleteItem(edges_data, check_in_selection) mxs.append(edges_loop[current_sel_count], edge) return edges_loop print(get_data_edges())

Re: How do I add each group of selected edges to a separate array?

denisT.MaxDoctor — Mon, 06 Dec 2021 18:21:06 GMT

@ivanchin.ivan wrote:
hastily, rewrote in python, then I'll revise the solution

what's the difference? it is the same algorithm, the same very slow for high resolution objects.

Re: How do I add each group of selected edges to a separate array?

ivanchin.ivan — Tue, 07 Dec 2021 03:58:33 GMT

I agree with you, this is still temporary

Re: How do I add each group of selected edges to a separate array?

denisT.MaxDoctor — Tue, 07 Dec 2021 11:37:00 GMT

even if you rewrite this algorithm in c++, nothing will change anyway. everything will remain very slow with a huge memory leaking... this algorithm works for "teapots" only

Re: How do I add each group of selected edges to a separate array?

ivanchin.ivan — Tue, 07 Dec 2021 12:43:37 GMT

I'm not trying to argue with you, I repeat - this is a temporary solution, for my tasks, so far enough.