GPencil: After using eraser when draw primitives, next primitive has missing handles #68021

New Issue

mobin · 2019-07-31T22:44:19+02:00

mobin commented

2019-07-31 22:44:19 +02:00

System Information
Operating system:Windows 10
Graphics card:msi gtx 1050ti

Blender Version
Broken: blender-2.81.0-git.af4dcc6073fa-windows64
Worked: (optional)

Short description of error
problems in the Curve / Line / Circle / Arc / Box tool why handles sometimes appear and sometimes disappear. Of course I'm sure Show Gizmo options are active and I don't use shortcuts
Exact steps for others to reproduce the error

Draw an object with the Curve tool

Handles are present early but disappear after a while

To reproduce:

Add a Arc primitive. Move control points.
Confirm with MMB
Select Eraser Tool and erase some parts.
Select Arc primitive again and draw something-> Handles are missing.

**System Information** Operating system:Windows 10 Graphics card:msi gtx 1050ti **Blender Version** Broken: blender-2.81.0-git.af4dcc6073fa-windows64 Worked: (optional) **Short description of error** problems in the Curve / Line / Circle / Arc / Box tool why handles sometimes appear and sometimes disappear. Of course I'm sure Show Gizmo options are active and I don't use shortcuts **Exact steps for others to reproduce the error** Draw an object with the Curve tool Handles are present early but disappear after a while To reproduce: 1) Add a Arc primitive. Move control points. 2) Confirm with MMB 3) Select Eraser Tool and erase some parts. 4) Select Arc primitive again and draw something-> Handles are missing.

mobin commented

2019-07-31 22:44:19 +02:00

Added subscriber: @Mobin.artworks

Antonio Vazquez commented

2019-07-31 23:03:30 +02:00

Added subscriber: @antoniov

Antonio Vazquez commented

2019-07-31 23:03:30 +02:00

What do you mean with

after a while

...as soon you confirm the primitive, the handles cannot be enabled again. They are only for creation, not to edit later. Maybe you expect to have handles all the time and edit the figure after confirming.

What do you mean with > after a while ...as soon you confirm the primitive, the handles cannot be enabled again. They are only for creation, not to edit later. Maybe you expect to have handles all the time and edit the figure after confirming.

mobin commented

2019-08-01 14:52:32 +02:00

No I know this

But when the shape has not yet been confirmed, the handles will disappear but the angles can be changed without the handle

Only the handles disappear for no reason

No I know this But when the shape has not yet been confirmed, the handles will disappear but the angles can be changed without the handle Only the handles disappear for no reason

Antonio Vazquez commented

2019-08-01 16:11:29 +02:00

Added subscriber: @CharlieJolly

Antonio Vazquez commented

2019-08-01 16:11:29 +02:00

@CharlieJolly Can you reproduce it? I cannot.

Charlie Jolly commented

2019-08-01 18:51:43 +02:00

@Mobin.artworks I'm unable to reproduce the issue. Are the control points for the start and end points still visible?

mobin commented

2019-08-01 23:53:57 +02:00

No No points are visible

You should work with this tool for at least ten minutes to find out. I suggest drawing a simple character with it

Can I upload a photo or video here to show you?

No No points are visible You should work with this tool for at least ten minutes to find out. I suggest drawing a simple character with it Can I upload a photo or video here to show you?

Charlie Jolly commented

2019-08-02 01:12:44 +02:00

Yes, more information the better.

mobin commented

2019-08-02 11:15:29 +02:00

@CharlieJolly Jolly (charlie)

I was able to figure out the cause of this problem!
First, draw a few simple lines with the Curve tool and change the angles with the handles
Then select the Eraser tool and clear a section of lines with it
And now if you choose Curve again and you will notice the disappearance of the handles!
I was able to record a movie from that. How do I send it to you?

@CharlieJolly Jolly (charlie) I was able to figure out the cause of this problem! First, draw a few simple lines with the Curve tool and change the angles with the handles Then select the Eraser tool and clear a section of lines with it And now if you choose Curve again and you will notice the disappearance of the handles! I was able to record a movie from that. How do I send it to you?

Antonio Vazquez commented

2019-08-02 11:37:15 +02:00

@Mobin.artworks How you sue the Eraser tool? select in he toolbar?

I cannot select the Eraser tool (I need press Enter or MMB before)...if you do that..you have confirmed the curve, so you will never get the handles again. If you get the eraser using othe rmodes, tell me how you did it.

To clarify, the primitive tools are not like tools in other softwares where you can create, delete, edit again, etc. This is not supported, maybe in future relases, but now after the creation it converts in a normal stroke and you must modify with sculpt tools or common edit tools like hand drawing strokes.

PS: You can put the video in Dropbox/Youtube, etc and put here the link.

@Mobin.artworks How you sue the Eraser tool? select in he toolbar? I cannot select the Eraser tool (I need press Enter or MMB before)...if you do that..you have confirmed the curve, so you will never get the handles again. If you get the eraser using othe rmodes, tell me how you did it. To clarify, the primitive tools are not like tools in other softwares where you can create, delete, edit again, etc. This is not supported, maybe in future relases, but now after the creation it converts in a normal stroke and you must modify with sculpt tools or common edit tools like hand drawing strokes. PS: You can put the video in Dropbox/Youtube, etc and put here the link.

mobin commented

2019-08-02 11:56:13 +02:00

No, you haven't noticed!

Yes, you press Enter, then select Eraser and clear a part of the line drawn with the Curve tool!

Then select the Curve tool again and start dragging.

The handles no longer exist

No, you haven't noticed! Yes, you press Enter, then select Eraser and clear a part of the line drawn with the Curve tool! Then select the Curve tool again and start dragging. The handles no longer exist

mobin commented

2019-08-02 11:57:32 +02:00

bandicam 2019-08-02 13-41-34-615.mp4

[bandicam 2019-08-02 13-41-34-615.mp4](https://archive.blender.org/developer/F7645420/bandicam_2019-08-02_13-41-34-615.mp4)

Antonio Vazquez commented

2019-08-02 11:59:18 +02:00

Ok, this give us a clue of the problem...the handles are not visible in the "next" arc

Antonio Vazquez self-assigned this 2019-08-02 12:00:53 +02:00

mobin commented

2019-08-02 12:00:54 +02:00

Yes that's right

Antonio Vazquez changed title from ~~Gp handels~~ to GPencil: After using eraser when draw primitives, next primitive has missing handles

2019-08-02 12:02:41 +02:00

Charlie Jolly commented

2019-08-02 12:09:05 +02:00

Confirmed.

Not entirely sure why this is happening but if you select the draw tool then the arc tool the control points are visible again.

Confirmed. Not entirely sure why this is happening but if you select the draw tool then the arc tool the control points are visible again.

mobin commented

2019-08-02 12:20:26 +02:00

Yes, that's why I said that it appears for no reason and disappears again

Antonio Vazquez commented

2019-08-02 12:20:57 +02:00

I have seen the reason...fixing it

Antonio Vazquez commented

2019-08-02 12:39:54 +02:00

Added subscriber: @ideasman42

Antonio Vazquez commented

2019-08-02 12:39:54 +02:00

I have found the reason.

When you draw a primitive, by default the current brush->gpencil_tool is DRAW, so the following variable is true:

const bool is_paint_tool = (bool)((brush) && (brush->gpencil_tool == GPAINT_TOOL_DRAW));

The problem when you use the erase, the tool change to GPAINT_TOOL_ERASE and the variable above will be false.

To solve the issue, we need set the gpencil_tool to GPAINT_TOOL_DRAW for all primitives. This is the reason when you select again Draw tools, the handles back again.

@ideasman42 How we can set this value and change the brush when select the Primitive Tools (Line, Arc, Box, Curve)? The logic would be set the same Brush used in Draw mode.

I have found the reason. When you draw a primitive, by default the current brush->gpencil_tool is DRAW, so the following variable is true: `const bool is_paint_tool = (bool)((brush) && (brush->gpencil_tool == GPAINT_TOOL_DRAW));` The problem when you use the erase, the tool change to `GPAINT_TOOL_ERASE` and the variable above will be false. To solve the issue, we need set the gpencil_tool to `GPAINT_TOOL_DRAW` for all primitives. This is the reason when you select again Draw tools, the handles back again. @ideasman42 How we can set this value and change the brush when select the Primitive Tools (Line, Arc, Box, Curve)? The logic would be set the same Brush used in Draw mode.

mobin commented

2019-08-02 12:45:18 +02:00

I hope you find a solution

Thank you very, very much

I hope you find a solution Thank you very, very much

Antonio Vazquez commented

2019-08-02 12:46:21 +02:00

@Mobin.artworks Thanks to you for catching the bug and be able to reproduce it.

mobin commented

2019-08-02 12:58:07 +02:00

you're welcome. You're great because you make Blender users not alone with their problems and it makes a great sense❤?

Antonio Vazquez commented

2019-08-02 13:24:30 +02:00

I have seen this bug has other potential bug "inside". As the primitive is using the current brush, if the material is pinned, the primitive will use the current material and not the pinned material because the active brush is not the same used in Draw Tool.