Half Knife. Fast knife tool for Blender

Artem_Poletsky · April 30, 2020, 1:36pm

And a new release too.

I just had to delete the original key to save changes in the addon preferences.

Should be turned off by default now.

bassig · April 30, 2020, 2:05pm

There seems to be an issue with the new version. After activating the addon and restarting Blender, the Hotkeys are gone:

Traceback (most recent call last):
  File "C:\Users\super\Desktop\blender-2.82a-windows64\2.82\scripts\startup\bl_ui\space_userpref.py", line 1916, in draw
    draw(context)
  File "C:\Users\super\Desktop\blender-2.82a-windows64\2.82\scripts\addons\half_knife\preferences.py", line 102, in draw
    self.draw_keymaps(box)
  File "C:\Users\super\Desktop\blender-2.82a-windows64\2.82\scripts\addons\half_knife\preferences.py", line 134, in draw_keymaps
    km = kc.keymaps['Mesh']
KeyError: 'bpy_prop_collection[key]: key "Mesh" not found'

After deactivating the addon it can’t be activated again:

Exception in module register(): C:\Users\super\Desktop\blender-2.82a-windows64\2.82\scripts\addons\half_knife\__init__.py
Traceback (most recent call last):
  File "C:\Users\super\Desktop\blender-2.82a-windows64\2.82\scripts\modules\addon_utils.py", line 382, in enable
    mod.register()
  File "C:\Users\super\Desktop\blender-2.82a-windows64\2.82\scripts\addons\half_knife\__init__.py", line 575, in register
    bpy.utils.register_class(cls)
ValueError: register_class(...): already registered as a subclass 'HalfKnifePreferences'

Artem_Poletsky · April 30, 2020, 2:13pm

Try a new version.
Linux problem with hotkeys will be opened for now. I reverted that change.

bassig · April 30, 2020, 2:39pm

Seems to work now, thanks!

Just had another small problem: I’ve set Half-Knife to C and Half-Knife with Snap to center enabled to Shift-C. After using both, Half-Knife always snapped to the edge’s center regardless of what I pressed. After enabling and disabling every unwanted option (so that they are not grayed out any more) it works as intended though.

Keep up the great work! Really like this tool and where it’s going.

Artem_Poletsky · April 30, 2020, 4:04pm

In new 1.2.3 version all items will be active by default.
Also, fixed division by zero error, when nothing is selected and you adding a new vertex.

MarioPeper · May 1, 2020, 1:04pm

I have now tested the 1.2.2 and everything is going well. Only changes in the keymap are not saved. But if you change it in the Blender Preferences it works. e.G. i use k without the preview and shift + K with.

Artem_Poletsky · May 2, 2020, 1:47pm

New 1.2.4 version is available on Gumroad.
Also you can check out keymap settings guide.

github.com

artempoletsky/half_knife_docs/blob/master/keymaps.md

# Keymaps settings

The author thinks that it is more convenient for new users to use the preview by default.
For expirienced users perhaps more useful to switch the `K` and the `shift K` shortcuts.

## Adding a new shortcut

After pressing the `Add new` button, you will see a new keymap item. 

![](https://raw.githubusercontent.com/artempoletsky/half_knife_docs/master/img/keymaps2.png)

All operator settings will be inactive and highlighted with gray color.
Because the `mesh.half_knife_operator` can be used as both modal and not modal operator, you need to specify all settings of the operator.
They all must be active like in the image below. Otherwise your shortcut will "remember" the setting from the last use.

![](https://raw.githubusercontent.com/artempoletsky/half_knife_docs/master/img/keymaps3.png)

Here is an example of a new custom shorcut. It can be used as quick edge subdivide.  
With nothing is selected, mouse over an edge, and press `ctrl K`.

This file has been truncated. show original

MarioPeper · May 2, 2020, 5:42pm

Well Done. This is a great helper in the mesh workflow. You should really post Half Knife at Blendermarket. You’ll get good customer ratings. I have installed and tested about 180 addons. This is one of the most important for people who love the famous fast shortcut workflow in Blender.

Artem_Poletsky · May 2, 2020, 6:17pm

You should really post Half Knife at Blendermarket.

Thanks. I have been waiting for closing up major issues. Now I have posted the addon to review at Blender market.

bassig · May 4, 2020, 7:46pm

Tried the latest version and keep getting this error very frequently:

location: <unknown location>:-1
Error: OverflowError: Python int too large to convert to C int

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Program Files\Blender Exp\2.90\scripts\addons\half_knife\__init__.py", line 593, in invoke
    self.run_cut()
  File "C:\Program Files\Blender Exp\2.90\scripts\addons\half_knife\__init__.py", line 395, in run_cut
    bpy.ops.view3d.select(location = (int(select_location.x), int(select_location.y)))
  File "C:\Program Files\Blender Exp\2.90\scripts\modules\bpy\ops.py", line 201, in __call__
    ret = op_call(self.idname_py(), None, kw)
SystemError: <built-in function call> returned a result with an error set

location: <unknown location>:-1

Happens in situations like these when cutting to a corner (from A to B in this image):

Artem_Poletsky · May 4, 2020, 8:30pm

I can’t reproduce. Can you send me a blend file?

bassig · May 4, 2020, 8:51pm

Well I just tried to reproduce it again but couldn’t. First I thought it may be related to me having used the 2.90 alpha because it didn’t occur with the current 2.82 stable. But after returning to 2.90 again it didn’t happen there either. It actually feels rock solid now. Sorry to bother you!

Artem_Poletsky · May 4, 2020, 8:55pm

A free thread bump

bkjernisted · May 5, 2020, 2:07am

Artem, how do you start your cut on the middle of an edge? Thanks Edit: I figured it out. You need to press control. Thanks

Artem_Poletsky · May 13, 2020, 6:27pm

Half-knife is finally released on the Blender market.

jay27flow · October 26, 2020, 8:32am

Is this tool working with 2.83?

Artem_Poletsky · October 26, 2020, 8:54am

Affirmative

jay27flow · October 26, 2020, 10:05am

Thank you!

xan2622 · November 1, 2020, 10:07am

Hi @Artem_Poletsky

I have noticed that your python files don’t have the usual “GPL license paragraph” (or compatible license) at the top.
Alternatively, you can just add a LICENSE.txt file in your ZIP archive if you prefer.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

Artem_Poletsky · November 1, 2020, 11:15am

I have read how to add GPL license. It seems like I need to add GPL block in EVERY file and LICENSE.txt both.

But I looked at other addons and they usualy adding only the GPL block without the license file. Is it because Blender already contains the license file? Are they all doing it wrong?