Projecting a lot of control points is too laggy

hamed.desighn · October 12, 2021, 9:00am

My main language isn’t english , and im so sorry if i wasn’t polite , @martinsiegrist im so sorry my friend , but literally there is no file , this question is general and not related to a specific case and not needed a file , again im so sorry @martinsiegrist

martinsiegrist · October 12, 2021, 9:09am

Even for general situations it’s your task to provide a file, so the person helping you does not have to assume anything. Many times people struggle because of an overlooked stupid little detail. Might not be the case here but it’s much easier for anyone to help when there is a file.

In addition to this, you mention your very powerful computer. Very powerful … this is relative and does not mean anything.

Type SystemInfo and paste the entire system info in a new post would help developpers pinpoint why you’re experiencing problems

jeremy5 · October 12, 2021, 9:22am

So, continuing the guessing game…

Is the idea that you want to go from this:

to this?

And do you want the result to be a polysurface or a mesh?

hamed.desighn · October 12, 2021, 9:35am

first one and mesh

hamed.desighn · October 12, 2021, 9:41am

I guess thats not needed as our friend @Tom_P posted a file and photo already you can try it by yourself .

hamed.desighn · October 26, 2021, 1:43pm

Projectto.gh (13.0 KB)
1Mil points taking about 20 mins with this grasshopper project , i guess this is a performance issue with rhino , where i can report this ?

CPU : intel corei7 10700
16gb ram
gtx1060

eddi · October 26, 2021, 5:39pm

Hi Hamed,

Majority of Rhino users modeled with surfaces, and in this area has McNeel primarly developed his tools.
I refer to Jeremy’s solution, fast and precise.
Rhino is not polygonal or voxel specialized, but can handle these.
Everything else is tried to create it with plugins, if not possible, then hops to other software is required.

I think your request has been heard.

In my previous post I tested it with 2.5D plugin DOCOFOSSOR.
It has ability to stacking geometry over plane, similar to other known carving tools.

Manual for components here:

github.com

dbt-ethz/docofossor/blob/master/DOCUMENTATION.md

# Documentation

## Docofossor list format

The Docofossor format is used to calculate boolean operations within the 2.5D distance field. Docofossor's data structure is based on a single list that defines a regular spaced quad grid from topographic data. The Docofossor list `df[]` consist of a header part (dimension list) that defines the properties of the grid such as the cell size, the number of rows and columns, and the coordinates of the origin of the grid. The header information is followed by z-values coming from a [Digital Terrain Model (DTM)](https://en.wikipedia.org/wiki/Digital_elevation_model) in column-major order starting bottom left. 

## Dimension list

The first 10 values of the `df[]` list holds the following information, specified as the `dim[]` list:

|Line|type|Variable|Description|
|-|-|-|-|
|dim[0]|int|nc|Number of columns|
|dim[1]|int|nr|Number of rows|
|dim[2]|float|ox|X coordinate of the local origin (lower left corner of the grid, center of the cell)|
|dim[3]|float|oy|Y coordinate of the local origin (lower left corner of the grid, center of the cell)|
|dim[4]|float|cx|Cellsize X|
|dim[5]|float|cy|Cellsize Y|
|dim[6]||||
|dim[7]||||

This file has been truncated. show original

Input for height, side angle, indentation angle are available, other…
! Plugin has its limits !

pascal · October 26, 2021, 6:13pm

Projecting the mesh points to the breps, in @Tom_P 's file, is instant here. Please provide a file that shows the problem - if posting publically is a problem, please send to tech@mcneel.com with a link back to this topic in your comments.

-Pascal

Tom_P · October 26, 2021, 8:17pm

dear pascal - thanks for having a look at this.
using the 100x100 point mesh of my file, turn on control points,
_project
_selPt
… click on the one side surfaces
project needs arround 6 seconds on my macbook pro 2.3 ghz, 8 core.

if i do a rectangular selection (instead of _selPt), the mesh-edges are projected as well and become curves / lines.
3 times the work but arround 25 seconds to calculate.

doing the same (_pointsOn _selPt) on a virtual machine / vmware on the rhino windows side it feels faster (4.5 seconds ?) - but also not instant.

ok just wanted to say what i meant with

for me this is not a workflow i need. just wanted to clarify my initial post.
kind regards -tom

hamed.desighn · October 27, 2021, 12:20pm

Thanks everybody , this forum is literally the best ever , there was a lot of solutions for this , but i found using another software is the answer so far , but in rh7 we can kinda do this by projecting cps in smal clusters like 5k to get the job done as for the previous versions there is no solution at all , another alt softwares are artcam (specially made for this) or blender or clayoo for rhino .