Generating one point with Line node in End Points mode #87702

New Issue

Sergey · 2021-04-22T11:13:30+02:00

Sergey commented

2021-04-22 11:13:30 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: Intel(R) HD Graphics 630 Intel 4.5.0 - Build 25.20.100.6471

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-04-21 20:15, hash: 932b23782a

Short description of error
It looks inconsistent to me that the node in Offset mode can generate only one point but in Edn Points mode it can't.

Exact steps for others to reproduce the error
untitled.blend

Open the file
Switch between the node modes and look into Spreadsheet editor

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: Intel(R) HD Graphics 630 Intel 4.5.0 - Build 25.20.100.6471 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-04-21 20:15, hash: `932b23782a` **Short description of error** It looks inconsistent to me that the node in `Offset` mode can generate only one point but in `Edn Points` mode it can't. **Exact steps for others to reproduce the error** [untitled.blend](https://archive.blender.org/developer/F10032253/untitled.blend) 1. Open the file 2. Switch between the node modes and look into Spreadsheet editor

Sergey commented

2021-04-22 11:13:30 +02:00

Added subscriber: @randum

Jacques Lucke commented

2021-04-23 12:32:08 +02:00

Added subscribers: @HooglyBoogly, @JacquesLucke

Jacques Lucke commented

2021-04-23 12:32:08 +02:00

Hm, I can confirm the behavior, but I'm not sure if this should be considered a bug. Should the single point be the start location, the end location or maybe in the middle?

Hans Goudey commented

2021-04-23 20:42:50 +02:00

I guess it would make most sense at the beginning, since that's a bit similar to the offset mode? That's pretty arbitrary though...

Sergey commented

2021-04-24 20:27:49 +02:00

I was trying to recreate array linear modifier with the node. I think primitive nodes quite suitable for this. And it's very convenient that the Offset mode is able to generate one point because there are cases when generating of one object is what is expected from the array modifier. Also it's convenient sometimes to generate arrays with the end points mode interface.

One more evidence of that End points mode also could be capable of generating only one point is the linspace function of the numpy library. Its functionality actually is pretty the same. The function can generate array with only one value which is equal to the start parameter.

I think if someone need guarantee output of the node consists of no less than two points it's always possible to use a math node before the count parameter.
Actually with new switch node it's also possible to replace output of the node with one point but this solution looks unnecessary too nody.

I was trying to recreate array linear modifier with the node. I think primitive nodes quite suitable for this. And it's very convenient that the `Offset` mode is able to generate one point because there are cases when generating of one object is what is expected from the array modifier. Also it's convenient sometimes to generate arrays with the `end points` mode interface. One more evidence of that `End points` mode also could be capable of generating only one point is the [linspace](https://numpy.org/doc/1.20/reference/generated/numpy.linspace.html?highlight=linspace#numpy.linspace) function of the `numpy` library. Its functionality actually is pretty the same. The function can generate array with only one value which is equal to the start parameter. I think if someone need guarantee output of the node consists of no less than two points it's always possible to use a math node before the count parameter. Actually with new switch node it's also possible to replace output of the node with one point but this solution looks unnecessary too nody.

Hans Goudey commented

2021-04-26 23:55:44 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'