Problems of UV coordinates and SVG export #76736

New Issue

baoyu · 2020-05-14T10:22:47+02:00

baoyu commented

2020-05-14 10:22:47 +02:00

System Information
Operating system: Windows 10 1903
Graphics card: rtx 2070 super and rtx 2080

Blender Version
Broken: 2.9 alpha and all older versions
Worked: none worked

Short description of error
No.1, 2D UV point average coordinate behaves differently from other 3D package or 2D programs.
No.2, when exporting uv as svg from a blender file whose name contains Chinese charactor, the result svg file would have encoding issue in block causing most software treat the svg file as borken file.
Detailed problem discription here https://devtalk.blender.org/t/problems-of-uv-coordinates-and-svg-export/13148

Exact steps for others to reproduce the error
Just try the attached blend file.
你好测试.blend
Based on the default startup or an attached .blend file (as simple as possible).

**System Information** Operating system: Windows 10 1903 Graphics card: rtx 2070 super and rtx 2080 **Blender Version** Broken: 2.9 alpha and all older versions Worked: none worked **Short description of error** No.1, 2D UV point average coordinate behaves differently from other 3D package or 2D programs. No.2, when exporting uv as svg from a blender file whose name contains Chinese charactor, the result svg file would have encoding issue in <desc> block causing most software treat the svg file as borken file. Detailed problem discription here https://devtalk.blender.org/t/problems-of-uv-coordinates-and-svg-export/13148 **Exact steps for others to reproduce the error** Just try the attached blend file. [你好测试.blend](https://archive.blender.org/developer/F8534725/你好测试.blend) Based on the default startup or an attached .blend file (as simple as possible).

baoyu commented

2020-05-14 10:22:47 +02:00

Added subscriber: @baoyu

Philipp Oeser commented

2020-05-14 11:28:04 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-05-14 11:28:04 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Philipp Oeser commented

2020-05-14 11:28:04 +02:00

Just a first stab in the dark:

Does it help to specifiy encoding? Changing it "by hand" to

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

or

<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>

Does the import in other software work then?

Just a first stab in the dark: Does it help to specifiy encoding? Changing it "by hand" to ``` <?xml version="1.0" encoding="UTF-8" standalone="no"?> ``` or ``` <?xml version="1.0" encoding="ISO-8859-1" standalone="no"?> ``` Does the import in other software work then?

baoyu commented

2020-05-14 11:55:39 +02:00

In #76736#931305, @lichtwerk wrote:
Just a first stab in the dark:

Does it help to specifiy encoding? Changing it "by hand" to
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
or
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
Does the import in other software work then?

Nope.
e.g. my blender file name is "你好测试.blender" ("Hello test.blender" in English), when I export uv map as svg, other programs wouldn't recognize it. When open that svg file in text editor, note the 6th line goes:

<desc>ÄãºÃ²âÊÔ.blend, (Blender 2.90 (sub 1))</desc>

It's these Chinese charator being wrongly encoded to some weird unicode. I guess some tweaks in the svg export python script would solve the issue. Though I could manually fix this issue using text editor, I thought maybe the developer could solve the inconvience once for all CJK language users.

> In #76736#931305, @lichtwerk wrote: > Just a first stab in the dark: > > Does it help to specifiy encoding? Changing it "by hand" to > > ``` > <?xml version="1.0" encoding="UTF-8" standalone="no"?> > ``` > or > > ``` > <?xml version="1.0" encoding="ISO-8859-1" standalone="no"?> > ``` > > Does the import in other software work then? Nope. e.g. my blender file name is "你好测试.blender" ("Hello test.blender" in English), when I export uv map as svg, other programs wouldn't recognize it. When open that svg file in text editor, note the 6th line goes: ``` <desc>ÄãºÃ²âÊÔ.blend, (Blender 2.90 (sub 1))</desc> ``` ![image.png](https://archive.blender.org/developer/F8534954/image.png) It's these Chinese charator being wrongly encoded to some weird unicode. I guess some tweaks in the svg export python script would solve the issue. Though I could manually fix this issue using text editor, I thought maybe the developer could solve the inconvience once for all CJK language users.

Philipp Oeser commented

2020-05-14 12:01:52 +02:00

Maybe a misunderstanding, what I meant is changing the first line in the svg file in a text editor and save, have you tried that?
(your first line still shows as <?xml version="1.0" standalone="no"?> -- no encoding specified...)

Maybe a misunderstanding, what I meant is changing the first line in the svg file in a text editor and save, have you tried that? (your first line still shows as `<?xml version="1.0" standalone="no"?>` -- no encoding specified...)

Yevgeny Makarov commented

2020-05-14 12:10:38 +02:00

Added subscriber: @jenkm

Yevgeny Makarov commented

2020-05-14 12:10:38 +02:00

No.1

Here the average value for all vertices, some vertices are overlaid.

For example:

( 0.5 + 0.5 + 0.5 + 0.25 + 0.25 + 0.0 ) / 6 = 0.333

No.1 Here the average value for all vertices, some vertices are overlaid. For example: ![uv-average.png](https://archive.blender.org/developer/F8534995/uv-average.png) ( 0.5 + 0.5 + 0.5 + 0.25 + 0.25 + 0.0 ) / 6 = 0.333

Yevgeny Makarov commented

2020-05-14 12:28:47 +02:00

I have no problems with exporting svg and then opening it in Affinity Designer.

I have no problems with exporting svg and then opening it in Affinity Designer. ![export.png](https://archive.blender.org/developer/F8535029/export.png)

baoyu commented

2020-05-14 13:02:05 +02:00

In #76736#931357, @jenkm wrote:
No.1

Here the average value for all vertices, some vertices are overlaid.

For example:

( 0.5 + 0.5 + 0.5 + 0.25 + 0.25 + 0.0 ) / 6 = 0.333

Thank you! If I don't misunderstand what you said, when I don't rip apart the uv faces, the uv points are just overlaping each other like this:

However, this agorithom is kind unintuitive to artist, especially for those who are used to 2D programs that thinks and manipulates things in 2D space.
I highly suggest we offer a choice to change this calc behavier!

> In #76736#931357, @jenkm wrote: > No.1 > > Here the average value for all vertices, some vertices are overlaid. > > For example: > > ![uv-average.png](https://archive.blender.org/developer/F8534995/uv-average.png) > > ( 0.5 + 0.5 + 0.5 + 0.25 + 0.25 + 0.0 ) / 6 = 0.333 Thank you! If I don't misunderstand what you said, when I don't rip apart the uv faces, the uv points are just overlaping each other like this: ![image.png](https://archive.blender.org/developer/F8535045/image.png) However, this agorithom is kind unintuitive to artist, especially for those who are used to 2D programs that thinks and manipulates things in 2D space. I highly suggest we offer a choice to change this calc behavier!

baoyu commented

2020-05-14 13:04:05 +02:00

In #76736#931360, @jenkm wrote:
I have no problems with exporting svg and then opening it in Affinity Designer.

Why? How did you make that happen?

> In #76736#931360, @jenkm wrote: > I have no problems with exporting svg and then opening it in Affinity Designer. > > ![export.png](https://archive.blender.org/developer/F8535029/export.png) Why? How did you make that happen?

baoyu commented

2020-05-14 13:11:25 +02:00

In #76736#931360, @jenkm wrote:
I have no problems with exporting svg and then opening it in Affinity Designer.

Oh, I think I figured it out! Maybe it's be i18n thing. Can I see your translation config in Blender preference?
This is mine:

> In #76736#931360, @jenkm wrote: > I have no problems with exporting svg and then opening it in Affinity Designer. > > ![export.png](https://archive.blender.org/developer/F8535029/export.png) Oh, I think I figured it out! Maybe it's be i18n thing. Can I see your translation config in Blender preference? This is mine:![image.png](https://archive.blender.org/developer/F8535076/image.png)

Yevgeny Makarov commented

2020-05-14 13:32:45 +02:00

I use English, but I also tried switching to others.

Try "Load Factory Preferences" and then export.

I use English, but I also tried switching to others. Try "Load Factory Preferences" and then export.

baoyu commented

2020-05-14 13:39:27 +02:00

In #76736#931407, @jenkm wrote:
I use English, but I also tried switching to others.

Try "Load Factory Preferences" and then export.

I was using automatic, and basically automatic is the same as English. I tried switch to English, that didn't work either.
Then I tried export after Load Factory Preferences, failed again.
BTW, thanks for your patience!

> In #76736#931407, @jenkm wrote: > I use English, but I also tried switching to others. > > Try "Load Factory Preferences" and then export. I was using automatic, and basically automatic is the same as English. I tried switch to English, that didn't work either. Then I tried export after Load Factory Preferences, failed again. BTW, thanks for your patience!

Ankit Meel commented

2020-05-21 14:41:56 +02:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Campbell Barton commented

2020-06-02 10:57:24 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2020-06-02 10:57:24 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Campbell Barton commented

2020-06-02 10:57:24 +02:00

Please include the generated SVG, when I export this file on Linux I get the file name working properly:

Please include the generated SVG, when I export this file on Linux I get the file name working properly: ![Suzanne.svg](https://archive.blender.org/developer/F8571760/Suzanne.svg)

baoyu commented

2020-06-02 11:02:44 +02:00

In #76736#942610, @ideasman42 wrote:
Please include the generated SVG, when I export this file on Linux I get the file name working properly:

Here's the svg I exported from
Blender 2.90.3 Alpha
Hash: 86fa8dc7f7

> In #76736#942610, @ideasman42 wrote: > Please include the generated SVG, when I export this file on Linux I get the file name working properly: ![Suzanne.svg](https://archive.blender.org/developer/F8571760/Suzanne.svg) Here's the svg I exported from Blender 2.90.3 Alpha Hash: 86fa8dc7f73a ![Cube.svg](https://archive.blender.org/developer/F8571767/Cube.svg)

Campbell Barton commented

2020-06-02 11:07:19 +02:00

If you type this into the Python console, does it display the file path properly?

bpy.data.filepath

(press Enter).

I see:

PYTHON INTERACTIVE CONSOLE 3.8.3 (default, May 17 2020, 18:15:42)  [GCC 10.1.0]

Builtin Modules:       bpy, bpy.data, bpy.ops, bpy.props, bpy.types, bpy.context, bpy.utils, bgl, blf, mathutils
Convenience Imports:   from mathutils import *; from math import *
Convenience Variables: C = bpy.context, D = bpy.data

>>> bpy.data.filepath

'/d/你好测试.blend'

>>>

If you type this into the Python console, does it display the file path properly? ``` bpy.data.filepath ``` (press Enter). ----- I see: ``` PYTHON INTERACTIVE CONSOLE 3.8.3 (default, May 17 2020, 18:15:42) [GCC 10.1.0] Builtin Modules: bpy, bpy.data, bpy.ops, bpy.props, bpy.types, bpy.context, bpy.utils, bgl, blf, mathutils Convenience Imports: from mathutils import *; from math import * Convenience Variables: C = bpy.context, D = bpy.data >>> bpy.data.filepath '/d/你好测试.blend' >>> ```

baoyu commented

2020-06-02 11:09:18 +02:00

It returns:

>>> bpy.data.filepath

'C:\\Users\\jiabaoyu\\Desktop\\你好测试.blend'

It returns: ``` >>> bpy.data.filepath 'C:\\Users\\jiabaoyu\\Desktop\\你好测试.blend' ```

blender-admin commented

2020-06-02 11:28:22 +02:00

This issue was referenced by blender/blender-addons@86c4ca71ef

This issue was referenced by blender/blender-addons@86c4ca71ef180fd67fe64451f8533d5ca3f6417e

Campbell Barton commented

2020-06-02 11:30:42 +02:00

Changed status from 'Needs User Info' to: 'Resolved'

Campbell Barton closed this issue

2020-06-02 11:30:42 +02:00

Campbell Barton self-assigned this 2020-06-02 11:30:42 +02:00

Campbell Barton commented

2020-06-02 11:30:42 +02:00

Committed fix blender/blender-addons@86c4ca71ef

baoyu commented

2020-06-02 11:32:38 +02:00

Good job Campbell!
Could you please check the other issue I posted ;)

Good job Campbell! Could you please check the other issue I posted ;)

Campbell Barton commented

2020-06-02 14:34:41 +02:00

@baoyu Blender uses the median center for coordinates, this is working as intended, we could support this but it's not something we use the bug tracker for.

baoyu commented

2020-06-02 14:47:50 +02:00

@ideasman42 Thanks! I was trying to implement that feature by making a addon, though my python skill is on a low level and I can't find default api for manipulating UV coordinate :(

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Problems of UV coordinates and SVG export #76736